Agenda for the 79th
Meeting of PCSC scheduled to be held on 25th
October, 2018 Page 1
SOUTHERN REGIONAL POWER COMMITTEE BENGALURU
Agenda for the 79th Meeting of Protection Coordination Sub-Committee of SRPC to be held on 25th October, 2018
1. Introduction
2. Confirmation of Minutes of last PCSC meeting
Confirmation of minutes of 78th Protection Coordination Sub-Committee meeting held on 27.09.2018.
3. Grid Occurrences
3.1 Grid Disturbances (GD), Grid Incidences (GI), and trippings due to failure of Auto-
reclosing (A/R), and mal-operation of PLCC equipment that occurred during the period Septmeber-October, 2018 given at Annexure-I would be discussed in the PCSC meeting.
Constituents are requested to furnish the following information in respect of the above grid occurrences to have fruitful discussions.
(a) Single line diagram of the station with switching devices, CT, PT and relay details. (b) Cause of the tripping & Remedial Action taken (c) Relay setting details
Constituents are requested to bring/ furnish full particulars of the tripping events pertaining to their system.
3.2 In compliance of Regulations 5.2 (r) of IEGC, the Constituents are required to furnish
the following information in respect of Grid Occurrences within 24 hrs of occurrence of the same to SRLDC/ SRPC: (a) First Information Report (FIR) (b) Event Logger (EL) output (c) Disturbance Recorder (DR) output (d) Trip event analysis report (with pre and post fault system conditions) Non-furnishing of tripping details (FIR/DR/EL/TR) for the period 01.09.2018 – 30.09.2018 had been brought to Constituents’ notice vide letters (i) No. SRPC/ SE-III/ PCSC/ 2018/ 6056-64 dated 20.09.2018, and (ii) No. SRPC/ SE-III/ PCSC/ 2018/ 6629 - 38 dated 10.10.09.2018. Non-compliance in this regard would be discussed in the meeting.
4. Submission of Reports/ Compliance by Constituents
4.1 Status of implementation of pending Protection Coordination
Sub-Committee (PCSC) Recommendations
The status of implementation of pending PCSC recommendations (up to 77th PCSC meeting) is given at Annexure-II. The latest status on the same may please be sent latest by 31.10.2018.
Agenda for the 79th
Meeting of PCSC scheduled to be held on 25th
October, 2018 Page 2
4.2 Remedial measures for "Transmission Elements under Forced Outage"
The Constituents are requested to furnish the remedial measures/ action taken by them for the tripping events as circulated vide our emails. (Annexure-III)
The tripping events are based on the daily reports at SRLDC website http://srldc.in/Reports.aspx under the menu: Reports->Daily-> "TL under Forced Outage")
4.3 Certificate for Healthiness of Batteries
As per the MoP direction given in pursuant to recommendations of the Enquiry Committee (NEW grid disturbance on 30th & 31st July, 2012), RPC’s are required to obtain from their respective Constituents the monthly certificate for healthiness of batteries, installed at 220 KV and above voltage level Substations (for power supply to Relays, RTUs and PLCC equipment) and furnish the same to CEA/ MoP.
With reference to above, the Constituents have been requested to submit the certificate on healthiness of batteries on monthly basis (i.e. status for a month shall be sent by the 7th day of the following month) to SRPC Secretariat.
The sought status for the months of September, 2018 is awaited from the following SR-Constituents:
KPTCL, TANGEDCO, TANTRANSCO, Puducherry ED, PGCIL (SR-I), NPCIL (KKNPP), JSWEL & TPCIL
5. Operationalization of Data Modification Notification System (DMNS) for the States
of Tamil Nadu, Kerala & Telanagana and the Union Territory of Puducherry
On the above subject, SRPC, vide their letter no: SRPC/ SE-III/ PMS/ 2018/ 5124 – 146 dated 03.08.2018 & subsequent reminder mails, had requested the Utilities of Tamil Nadu, Puducherry, Kerala & Telangana to furnish the details of their Users who are responsible for calculating relay settings and/ or intimating calculated relay settings to the field to SRPC Secretariat ([email protected]) latest by 18.08.2018 so as to create their respective DMNS Accounts. However, it is noted with concern that details in this regard are still awaited from the following Utilities:
SLDC-TANTRANSCO, TANGEDCO, and IL&FS Since DMNS has already been operationalised w.e.f. 10.09.2018, it is requested from the above Utilities to kindly furnish the sought details without further delay. In this regard, it is also requested from all Utilities of Tamil Nadu, Kerala, Telangana & Puducherry and SRLDC to regularly use DMNS application for intimating further changes that have taken place at the stations falling under their control after PRDC field visits.
Agenda for the 79th
Meeting of PCSC scheduled to be held on 25th
October, 2018 Page 3
6. Nominations of Nodal Officers from System Study Group & Protection Dept. of SLDC
& STU of all States and SRLDC for perfecting 132/ 110/ 66 kV Network of Southern
Region
As agreed in TCC-33 & SRPC-34 meetings on the above subject, SRPC, vide their mail dated 18.08.2018 & subsequent reminder mails, had requested to kindly send nomination (s) of suitable Nodal Officer (s) from System Study Group & Protection Dept. of SLDC & STU of each state, who are thorough with their respective 132/ 110/ 66 kV of network, and System Study Group & Protection Dept. of SRLDC to SRPC Secretariat ([email protected]) latest by 24.08.2018 for perfecting/ updating 132/ 110/ 66 kV network of southern region. However, it is noted that the following Utilities are yet to furnish the sought details:
SLDC & STU of Kerala and SLDC & STU of Karnataka Since it is proposed undertake & complete this exercise during October - November, 2018, it is requested from the above Utilities to kindly furnish the sought details without further delay.
7. Submission of PMS Pending Data by the Utilities of Andhra Pradesh
As informed by PRDC, the pending PMS Data as on 12.10.2018 yet to be submitted by the Utilities of Andhra Pradesh are enclosed at Annexure-IV for kind reference. It is requested from all concerned Nodal Officers of Utilities of Andhra Prdesh to take steps to ensure that the pending data are furnished to PRDC positively by 24.10.2018.
Non-compliance in this regard would be discussed in the meeting.
8. Other Protection Issues, if any, with the permission of the Chair
9. Sending Agenda items for the PCSC meetings
As per the Guidelines of CEA/MOP, it has been decided to conduct the PCSC meetings on monthly basis. It is requested that Agenda Items for the PCSC meetings, if any, may please be sent latest by 5th working day of the month to SRPC Secretariat to compile and circulate the same so as to have fruitful discussions in the PCSC meetings.
10. Date of next PCSC meeting
It is informed that the 80th meeting of PCSC will be held on 20th December, 2018 (Thursday) from 10:30 hrs onwards in the Conference Hall of SRPC Secretariat, Bengaluru.
*****
Grid Occurrences to be discussed in the 79th Meeting of PCSC scheduled to be held on 25th Oct, 2018 1/5
Grid Occurrences - 79
For all tripping events involving failure of substation equipment, Constituents are requested to kindly furnish the SLD or equivalent pictorial representation showing (i) Location of the fault, and (ii) Bus-bar arrangement/ Configuration of feeders and other connected equipment with proper CB positions (OPEN/ CLOSE) at the time of occurrence of the fault.
I. Details of Grid Disturbances:
Sl. No.
Details of Event Date &Time Reason Remarks Category
1 Complete Outage of 220kV Idukki Power Station
01-10-2018 at 04:16 hrs
Triggering incident was R-Ph fault in 220kV Idukki Kalamessary line-2. R-phase pole of breaker didn’t open at Idukki end. LBB of Bus-2 operated resulting in tripping of all connected elements along with running unit#4 at Idukki and 50MVA station transformer. At the same time, 220kV Idukki Kalamessary line-1 also got tripped at Idukki end. Subsequently running units 1 and 2 also tripped on Governor oil Low Pressure due to loss of AC supply. This resulted in complete outage of Idukki PS.
Gen. Loss: 125 MW
and Load Loss:
29 MW
GD-1
2 Complete outage of 230kVGummidipoondi Station
05-10-2018 at 00:42 hrs
Triggering incident was B-phase fault at 230kV Gummidipoondi substation due to which 230kV Bus-1 Bus-bar protection operated. 230kV Gummidipoondi Station was under single bus operation, hence operation of Bus-bar protection resulted in tripping of all connected elements.
Gen. Loss: 148 MW
and Load Loss:
22 MW
GD-1
3 Complete outage of 230kV Thiruvalam Substation
05-10-2018 at 14:32 hrs
Bus-1 got tripped at 230kV Thiruvalam substation due to spurious LBB relay (independent) operation of 230kV Thiruvalam Chitoor line. 230kV Thiruvalam substation was under single bus operation; hence operation of LBB protection resulted in tripping of all connected elements resulting in the complete outage
Load Loss: 244 MW
GD-1
4
Complete outage of 765/400kV Srikakulam SS and 220kV Tekkali SS
11-10-2018
Due to heavy wind and rain, all connected elements of 765kV and 400kV Srikakulam substations got tripped subsequently from 22:21hrs on 10-10-2018 to 03:10hrs of 11-10- 2018 resulting in the complete loss of supply. Due
Load Loss: 100 MW
GD-1
Annexure-I
Grid Occurrences to be discussed in the 79th Meeting of PCSC scheduled to be held on 25th Oct, 2018 2/5
to tripping of 220kV Garividi Tekkali line 2 at 22:44hrs on 10-10-2018 and 220kV Garividi Tekkali line 1 at 04:15hrs on 11-10-2018 because of heavy rain and wind, there was complete loss of supply at 220kV Tekkali Station . This further resulted in the loss of supply to radially fed 132kV stations of Tekkali namely 132kV Naupada,132kV Palasa, 132kV Narasannapatnam, 132kV Baruva and 132kV Pathapatnam substations of APTRANSCO
II. Details of Grid Incidents:
Sl. No. Details of Event Date &Time Reason Category
1 Tripping of Units- 3, 4 and 6 at Nagjheri.
03-09-2018 at 10:11 hrs
Unit # 3,4 and 6, station transformer and North Bus sectionalizer at 220 kV Nagjheri PH tripped due to control DC supply interruption. As verbally informed the control DC supply was switched OFF inadvertantly which resulted in trippings at Nagjheri.
GI-1
2 Tripping of 400kV Khamma-Kalpakka -2
01-09-2018 at 12:20 hrs
As per FIR, direct trip got extended from from Kalpakka to Khammam during carrying out retrofitting work in 400kV Simhadri feeder at 400kV Kalpaka Substation. Line was holding from Kalpakka end. Subsequently, operation of over voltage stg-1 protection at Khammam led to sending of direct trip command to Kalpakka resulting in tripping of line.
GI-2
3
Tripping of 400kV Suryapet – Julurupadu-2
02-09-2018 at 21:54 hrs
400kV Julurupadu-Suryapet line-2 tripped on directional earth fault indications at Suryapet end due to relay maloperation. As reported there was fault in 220kV Julurupadu-Kallur lines. The line didnot trip at Julurupadu end
GI-2
4 Tripping of 400kV Gooty - Nelmangala
03-09-2018 at 11:23 hrs
Line tripped on operation of DEF protection in Main-2 distance relay (MICOM-P444) during 220kV downstream fault near Gooty. Direct trip was sent to Nelamangala
GI-2
5 Tripping of HVDC Talcher-Kolar pole- 1
09-09-2018 at 07:45 hrs
Pole-1 got tripped at Kolar end on transformer protection due to operation of Bucholz alarm in Y-phase converter transformer. Pole-2 went into metallic
Annexure-I
Grid Occurrences to be discussed in the 79th Meeting of PCSC scheduled to be held on 25th Oct, 2018 3/5
return mode after the tripping of pole-1. SPS of HVDC Talcher-Kolar (Trip 1) got operated resulting in load relief of 783MW
6 Tripping of 400kV Khamman – Asupaka line-1
09-09-2018 at 09:59 hrs
B-phase to earth fault occurred in line. At Asupaka end, main breaker had tripped but Tie Breaker did not trip and LBB got operated due to gas pressure lockout resulting in tripping of line. Direct trip was sent to Khammam.
GI-2
7
Tripping of 400kV Srisailam – Dindi-1 and Srisailam - Kurnool
10-09-2018 at 15:11 hrs
Line tripped due to operation of Ground time over current protection in BUSBAR bay at SRISAILAM end. DT was sent to Dindi and Kurnool end.
GI-2
8 Tripping of 400kV Neyvelli TS-2 (Exp)-Pugalur
10-09-2018 at 20:57 hrs
Line tripped on B-N fault. Auto-reclose was not attempted at Pugalur end due to direct trip receive from NLC TS-2 end. At NLC TS-2 end, V>2 trip was observed in D.R. Analog voltages recorded in DR were observed to be less that O/v stg-2 setting.
GI-2
9 Tripping of 400kV Suryapet-Julurupadu-2
11-09-2018 at 14:46 hrs
As reported, line tripped on Directional Earth fault indications at Suryapet end and Direct trip received at Julurupadu end. Relay maloperation at Suryapet end.
GI-2
12-09-2018 at 11:33 hrs
10 Tripping of 400kV Suryapet –Julurupadu-1 and 2
11-09-2018 at 11:23 hrs & 11:24 hrs resp.
GI-2
11 Tripping of 400kV Suryapet –Julurupadu-1 and 2
25-09-2018 at 11:44 hrs
GI-2
12 Tripping of 400kV Nirmal-Sundilla-2
15-09-2018 at 13:55 hrs
Line tripped on operation of Overvoltage Stage-1 at Sundilla end and Direct trip received at Nirmal end. From the DR of Sundilla end difference in phase voltages observed (Vr-256kC, Vy-238kV and Vb-222kV). R-phase voltage is considerably higher than other two phases.
GI-2
18-09-2018 at 08:57 hrs
Line tripped on operation of Overvoltage Stage-1 at Sundilla end and Direct trip received at Nirmal end. From Sundilla end DR; Vr-256kV, Vy-236kV and Vb-224kV
13 Tripping of 400/220kV ICT-1 at Guttur
20-09-2018 at 18:18 hrs
As reported, ICT got tripped on operation of Back-up HV OC Numerical relay.
GI-2
Annexure-I
Grid Occurrences to be discussed in the 79th Meeting of PCSC scheduled to be held on 25th Oct, 2018 4/5
14 Tripping of 400kV Mamidapalli – Dindi-1
29-09-2018 at 16:00 hrs
On both occasions, line got tripped due to mal-operation of over-voltage function provided in distance relay.
GI-2
29-09-2018 at 23:12 hrs
30-09-2018 at 11:26 hrs
15 Tripping of 400/110kV ICT-1 & 2 at Rasipalayam
29-09-2018 at 22:57 hrs
ICTs tripped on operation of backup earthfault protection. Fault was in 110kV feeder.
GI-2
III. Details of Trippings due to Failure or Non-operation of Auto-Reclose:
Sl. No. Element Date & Time Reason
1 Tripping of 400kV Talaguppa-Nelmangala line
03-09-2018 at 11:25 hrs
B-phase to earth fault occurred in line due to insulator de-capping. Auto reclose was kept out of service by KPTCL.
2 Tripping of 400kV Ramagundam – Hyderabad-3
09-09-2018 at 03:23 hrs
B-phase to earth fault occurred in line. Auto-reclose was successful at Ghanapur and there was 3-phase trip at Ramagundam end due to direct trip receive
3 Tripping of 400 kV VIJAYAWADA-NELLORE-AP line-2
11-09-2018 at 15:26 hrs
B-phase to earth fault occurred in line. At vijayawada end there was zone-2 trip due to non-receipt of carrier which was in-turn due to PLCC carrier channel fail. Auto reclose not attempted.
4 Tripping of 400kV Chittoor – Kalikiri Line-1
15-09-2018 at 22:17 hrs
Line tripped on R-N fault. Auto-reclose successful at Kalikiri end but unsuccessful at Chittoor end.
16-09-2018 at 23:02 hrs
5 Tripping of 400kV Vemagiri-Sattanapalli
25-09-2018 at 14:10 hrs
Line tripped on B-N fault. Auto reclose successful at Sattenapally end and unsuccessful at Vemagiri end.
6 Tripping of 400kV RYTPP-Kalikiri line-2
26-09-2018 at 21:13 hrs
Line tripped on B-N fault. Auto-reclose was successful at Kalikiri and three phase trip at RYTPP due to A/r lockout.
7 Tripping of 400kV Veltoor-Uravakonda line-2
30-09-2018 at 18:42 hrs
Line tripped on B-N fault. Auto reclose not attempted at Veltoor end.
Annexure-I
Grid Occurrences to be discussed in the 79th Meeting of PCSC scheduled to be held on 25th Oct, 2018 5/5
IV. Details of Trippings due to PLCC mal-operation:
Sl. No. Element Date & Time Reason
1 Tripping of 400 kV KAYATHAR - KARAIKUDI line-2
12-09-2018 at 16:39 hrs
Line got tripped due to spurious direct trip sent from Kayathar. Direct trip was received at Karaikudi.
2 Tripping of 400kV Veltoor-Uravakonda line-2
22-09-2018 at 23:37 hrs
Feeder tripped on over voltage at Uravakonda end. Line did not trip at Veltoor end. DT not sent from Uravakonda end due to problem in configuration.
3 Tripping of 400kV JSW – Guttur line
28-09-2018 at 12:18 hrs
Line tripped on R-N fault. At Guttur end , AR attempted but unsuccessful due to persistant fault. Auto-reclose not attempted at JSW due to DT received.
*****
Annexure-I
Meeting
No /
Index
Details of Event Date & Time Reason PCSC Recommendations Utility responsible for
Implementation
Status of Implementation of PCSC Recommendations Remarks
Multi-Utilities
Status of Pending Implementation of PCSC Recommendations as on 12.10.2018 (up to 77th Meeting)
KPTCL Mail dated 27-05-2015:
1. KPTCL has taken action to provide bus bar protection to 220kV buses. --- Pending
2. Over current relay Settings of ICTs to be reviewed by PGCIL.
--- Pending
3. --- Pending
KPTCL Mail dated 29-07-2015:
1. Initial Tendering stage. --- Pending
2. --- Pending
3. --- Pending
KPTCL Mail dated on 23-01-2016:
1. Detailed estimate prepared for taking up the work. CEE, Transmission Zone, Gulbarga will
take up necessary procurement and further execution. --- Pending
2. --- Pending with PGCIL (SR-I).
3. --- Pending
PGCIL (SR-I) Mail dated 14.07.2016:
2. Relay settings of all the stations in SRTS-1 were derived as per Ramakrishna Commettee
recomendations and implemented" --- Completed.
KPTCL Mail dated 16.12.2017:
1) & 3). DPR is approved. Tender is to be called by CEE,TZ Kalaburgi --- Pending
Review Meeting dated 19.12.2017:
1. KPTCL informed that Tenders for providing BBP would be called in Jan-Feb, 2018; Supply of
the same is targeted by September, 2018; Erection & Commissioning is targeted by January,
2019
--- Pending
3. PGCIL (SR-I) informed that time-synchronization of 220 kV side is in place. --- Completed.
16-07-2014
APGENCO letter dated 18.03.2016:
1.SOE and SLD are attached. The DR of 405 CB is not generated during the incident. Now the
problem is identified and rectified.
--------- Completed
2.All the 3 lines i.e CHTR-2, MNBL-I & II tripped in zone
protection. The fault was in Blind zone i.e P2 side of CT, where it was covered under Bus fault by
the time fault moved on to P1 side when the fault comes under STUB/TEED zone after 330msec
all the feeders expect CHTR-1 tripped in Zone-II and total fault persisted for 500msec before the
405 TIE CB opens and clear the fault. As a remedial the STUB protection operation also checked
and found OK.------- Completed
3.The Time Sync was missed on the day and found there was problem with LAN Timer same was
rectified. Now found OK.
-----------Completed
4.Now the DR Time scale changed to 1 sec for Pre fault and 3 sec for Post fault and STATE of
events are corrected wherever found wrong/or misguiding during analysis.---------Completed.
PGCIL-SR1 RVMD 27-04-2016:
5. Procurement of differential protection for 400kV NPS-NLR D/C and 400kV RCR-RTPS-D/C is
under tendering.
PGCIL-SR1 RVMD 14-07-2016:
5. The proposal for procurement of Line differential Protections for 400kV Raichur - RTPS-1 & 2
and 400kV Nellore - NPS - 1 & 2 lines has been approved and tender is under technical
evaluation
PGCIL (SR-I) Mail dated 15.12.2017:
PGCIL: On 23.11.2017 LDP relays commissioned in place of Main-1 distance relay in 400kV NPS-
Nellore line-2 & In line-1 installation of LDP relay is planned in Dec-2017/Jan-2018.
Review Meeting dated 19.12.2017:
5. PGCIL (SR-I) informed that LDP commissioning on both lines would be completed by February,
2018. In this regard, PCSC made it clear that the recommendation pertains to providing LDP as
both Main-I & Main-II on both the lines, and asked PGCIL (SR-I) to ensure & comply with the
same.
APGENCO/
PGCIL (SR-I)
1. APGENCO to furnish to PCSC forum (i) A3-size Single Line
Diagram of SDSTPS, and (ii) the sequence of events with time
stamp showing the protection that opened Tie-CB (405) at
SDSTPS.
2. APGENCO to review STUB/TEED protection in all dias at
SDSTPS and ensure that they are configured for
instantaneous operation.
3. APGENCO to properly configure the STATE of the tripping
events so that they get recorded appropriately like TRIP/
OPERATED in their corresponding Event Loggers.
4. APGENCO to ensure time sync of all DR’s and EL’s at
SDSTPS.
5. PGCIL (SR-I) to provide line differential protection for 400
kV NPS –Nellore-PG lines 1 & 2.
As per FIR submitted, CT damage observed in Chitoor-
Main bay (404). Main breakers connected to bus-1 (401,
404, 407, 410) got tripped on operation of bus bar
protection. Unit-1 tripped on operation of MFT. Unit-2
was not in service
Complete outage of
Krishnapatnam TPS
08-09-2015
at 18:20 hrs
47/I/2
34/I/6 400/220 kV ICT-1 & 2 at
Munirabad
As reported directional over current relay of ICT’s
operated due to snapping of line jumper in 220kV
Lingapur line.
1. Bus bar protection shall be provided by asset owner ( i.e
KPTCL).
2. Settings for main distance protection & Overcurrent
protection shall be examined and reviewed.
3. Time synchronization of the Substation shall be ensured.
KPTCL/
PGCIL (SR-I)
Pending
(with KPTCL)
Pending
[with
PGCIL (SR-I)]
Annexure-II
Page 1 of 47
PGCIL (SR-I) mail dated 20.06.2018:
PGCI(SR1) procuring LDP relays for retrofitting of Main-1&2 distance relays. Tenders are invited
from bidders & tender floated. Technical bid opening in this week.
APGENCO letter dated 18.03.2016:
1.SOE and SLD are attached. The DR of 405 CB is not generated during the incident. Now the
problem is identified and rectified.
--------- Completed
2.All the 3 lines i.e CHTR-2, MNBL-I & II tripped in zone
protection. The fault was in Blind zone i.e P2 side of CT, where it was covered under Bus fault by
the time fault moved on to P1 side when the fault comes under STUB/TEED zone after 330msec
all the feeders expect CHTR-1 tripped in Zone-II and total fault persisted for 500msec before the
405 TIE CB opens and clear the fault. As a remedial the STUB protection operation also checked
and found OK.------- Completed
3.The Time Sync was missed on the day and found there was problem with LAN Timer same was
rectified. Now found OK.
-----------Completed
4.Now the DR Time scale changed to 1 sec for Pre fault and 3 sec for Post fault and STATE of
events are corrected wherever found wrong/or misguiding during analysis.---------Completed.
PGCIL-SR1 RVMD 27-04-2016:
5. Procurement of differential protection for 400kV NPS-NLR D/C and 400kV RCR-RTPS-D/C is
under tendering.
PGCIL-SR1 RVMD 14-07-2016:
5. The proposal for procurement of Line differential Protections for 400kV Raichur - RTPS-1 & 2
and 400kV Nellore - NPS - 1 & 2 lines has been approved and tender is under technical
evaluation
PGCIL (SR-I) Mail dated 15.12.2017:
PGCIL: On 23.11.2017 LDP relays commissioned in place of Main-1 distance relay in 400kV NPS-
Nellore line-2 & In line-1 installation of LDP relay is planned in Dec-2017/Jan-2018.
Review Meeting dated 19.12.2017:
5. PGCIL (SR-I) informed that LDP commissioning on both lines would be completed by February,
2018. In this regard, PCSC made it clear that the recommendation pertains to providing LDP as
both Main-I & Main-II on both the lines, and asked PGCIL (SR-I) to ensure & comply with the
same.
APGENCO/
PGCIL (SR-I)
1. APGENCO to furnish to PCSC forum (i) A3-size Single Line
Diagram of SDSTPS, and (ii) the sequence of events with time
stamp showing the protection that opened Tie-CB (405) at
SDSTPS.
2. APGENCO to review STUB/TEED protection in all dias at
SDSTPS and ensure that they are configured for
instantaneous operation.
3. APGENCO to properly configure the STATE of the tripping
events so that they get recorded appropriately like TRIP/
OPERATED in their corresponding Event Loggers.
4. APGENCO to ensure time sync of all DR’s and EL’s at
SDSTPS.
5. PGCIL (SR-I) to provide line differential protection for 400
kV NPS –Nellore-PG lines 1 & 2.
As per FIR submitted, CT damage observed in Chitoor-
Main bay (404). Main breakers connected to bus-1 (401,
404, 407, 410) got tripped on operation of bus bar
protection. Unit-1 tripped on operation of MFT. Unit-2
was not in service
Complete outage of
Krishnapatnam TPS
08-09-2015
at 18:20 hrs
47/I/2 Pending
[with
PGCIL (SR-I)]
Annexure-II
Page 2 of 47
PGCIL (SR-I) mail received on 27-04-2016:
1. The firmware of REL670 is being upgraded. ------- Completed.
2. The recording of events in msec interval is being taken up with OEM. Henceforth, for analysis
purpose, we will provide larm list which has msec time stamp. -------- Completed.
3. End to end testing of PLCC code transmision and tuning of channels carried out. -------
Completed.
4. Procurement of differential protection for 400kV NPS-NLR D/C and 400kV RCR-RTPS-D/C is
under tendering. The legends modified in Event/alarm list. Provision of diff. relay for all short
lines emanating from NPS is being taken up with our corporate.
----- Pending.
PGCIL(SR-I) RVMD 14-07-2016:
4. The proposal for procurement of Line differential Protections for 400kV Raichur - RTPS-1 & 2
and 400kV Nellore - NPS - 1 & 2 lines has been approved and tender is under technical
evaluation --- Pending
PGCIL (SR-I) Mail dated 15.12.2017:
4. LDP relays procurement is under process. Procurement will be completed by Feb-2018. TPCIL
has to give written confirmation for LDP relay procurement. For want of written confirmation
from TPCIL, PGCIL approving authority has withheld the LDP proposal.
Review Meeting dated 19.12.2017:
4. PGCIL (SR-I) informed that they are waiting for written confirmation from TPCIL to complete
procurement of LDP relays. To this, PCSC forum asked TPCIL to submit written confirmation to
PGCIL (SR-I) by 29.12.2017. PGCIL (SR-I) assured that with receipt of above confirmation from
TPCIL by Dec, 2017, they would be able to complete the work by FEbruary, 2018.
APTRANSCO informed that they would be able to implement LDP from their & APGENCO side by
April, 2018.
In this regard, PCSC forum made it clear that the recommendation is about providing LDP as
both Main-I & Main-II relays on all stated lines in Nellore Complex, ans asked all stakeholders to
ensure & comply with the same.
PGCIL (SR-I) mail dated 20.06.2018:
PGCI(SR1) procuring LDP relays for retrofitting of Main-1&2 distance relays. Tenders are invited
from bidders & tender floated. Technical bid opening in this week.
50/I/2 Complete outage of TPCIL power
station
30-12-2015 at
06:02hrs
Running units at Thermal Powertech power Station
tripped due to tripping of 400kV Nellore pooling station
(NPS)-TPCIL line and 400kV Nellore pooling station (NPS)-
NCC line
47/II/7 KPTCL Mail recieved on 25-05-2016:
1. Availability of week end infeed with eco feature to be confirmed by SEE,RTC,Hubli ---
Pending.
NPCIL (KGA) Mail recieved on 03-12-2016:
2. The 200 ms Definite time DEFR element in both Kaiga Kadra and Kaiga Kodasally lines were
disabled. IDMT DEFR is retained. The 200 ms Definite time back up o/c element in both Kaiga
Kadra and Kaiga Kodasally lines were disabled. IDMT is retained. --- Completed.
Status received vide KPCL mail dated 14.06.2017 & 29.11.2017:
1. Since PT blasted (B phase) at Karwar end, resistive over reach occurred. hence Backup
protecion operated at Kadra end (zone-2 not sensed) --- Pending.
2. ---- Completed
3.Newly commissioned micom P444 relay time synchronised with GPS ------ Completed.
KPTCL Mail dated 16.12.2017:
1. Week end infeed logic will be enabled in the new numerical relays supplied to Karwar under
R&U during retrofitting works.
--- Pending
Review Meeting dated 19.12.2017:
1. KPTCL informed that since the line is a double circuit, there may not be need for
implementing Weak Infeed logic with Echo feature at Karwar end. However, the same would be
looked into w.r.t. the newly commissioned NR's at Karwar, and final action taken would be
informed by March, 2018.
KPTCL/ KPCL/
NPCIL (KGS)
1. KPTCL/ KPCL to see the possibility of implementing Weak
Infeed logic with Echo feature enabled by Under
Voltage (27) element on Kadra-Karwar lines 1 &2, and
implement the same if feasible.
2. NPCIL to time-coordinate Kaiga’s DEFR settings with (i)
Zone-2 settings at Kaiga, and (ii) primary protections of the
lines emanating from Kadra and Kodasalli.
3. KPCL to ensure time-sync of EL’s, and healthiness of the
Fault Locators at Kadra.
220kV Kadra-Karwar lines-1&2 tripped
on earth fault in B-phase in zone-2.
Kaiga-Kadra line tripped at Kaiga end
only on operation of directional eath
fault protection.
Pending
[with KPTCL]
1.PGCIL (SR-I) to furnish Action Taken Report on the findings
of OEM on relay mal-operation at NPS end on 400 kV NPS –
NCC line to PCSC forum.
2. PGCIL (SR-I) to appropriately configure Station Event
Logger at NPS to record events at msec interval.
3. PGCIL (SR-I) to carry out PLCC end-to-end testing in
coordination with TPCIL for 400 kV NPS –TPCIL line.
4.PGCIL (SR-I), MEPL, SEL, TPCIL & NCC to take steps to
provide line differential protection at their respective ends on
all 400 kV lines (except Gooty line) emanating from Nellore
Pooling Station, and furnish an action plan to implement the
same.
PGCIL (SR-I),
MEPL, SEL, TPCIL, NCC
Pending
Tripping of 220 kV Kadra-Karwar
lines - 1&2 and 220kV Kaiga-
Kadra line
31-07-2015 at
11:44 hrs
Annexure-II
Page 3 of 47
PGCIL mail received on 27-04-2016:
Being pursued with APTRANSCO
APTRANSCO mail dated on 22-06-2016:
AS maintenance being carrired out by PGCIL(SR-1), the required relay replacement
(wiring/programming) may also be carried out by PGCIL(SR-1).
PGCIL RVMD 14.07.2016:
1. The CB problem has been attended by POWERGRID by using OEM M/s BHEL services &
POWERGRID's O&M spares.
------ Completed.
2. Being pursued with APTRANSCO to replace the faulty Event Logger at Vijayawada (Nunna) SS.
---- Pending
APTRANSCO mail dated on 31-08-2016 & 04.03.2017 & 24.05.2017:
As maintenance being carrired out by PGCIL(SR-1), the required relay replacement
(wiring/programming) may also be carried out by PGCIL(SR-1).
APTRANSCO mail dated 20.10.2017:
May be coordinated with PGCIL
APTRANSCO mail dated 22.11.2017:
PGCIL may be requested to take necessary action
APTRANSCO mail dated 15.12.2017:
2. EL procured and drawn. Configuration to be done by Alstorm company engineer. Will be
configured in four weeks.
---Pending
PGCIL (SR-I) Mail dated 15.12.2017:
2. APTRANSCO is to replace the faulty/outdated relays & POWERGRID has to maintain the relays
after retrofitting.
Review Meeting dated 19.12.2017:
2. APTRANSCO informed that the recommended works would be completed in one-month
period.
APTRANSCO Mail dated 30.01.2018 & 24.05.2018 & 26.06.2018
As per the requirement of PGCIL.Event logger(BCU) with data base is configured and handed
over to PGCIL/Nunna on 27 th dec 17.PGCIL is requested to take action for taking event logger
(BCU) into service.
PGCIL (SR-I) mail dated 20.06.2018:
PGCIL(SR1): New event logger was given by APTRANSCO to be installed & commissioned by
APTRANSCO.
As asset belongs to APTRANSCO & they have to commission the same.
56/I/2 Complete outage of 220kV
Sedam Substation of KPTCL.
19-06-2016 at
15:27hrs
220kV Sedam-Humnabad-2 tripped at Sedam on
Distance protection, Zone-2. Sedam-RTPS-1 &2 lines
tripped at RTPS end only. 220kV Tandoor inter-state line
was hand tripped due to incoming supply failure
KPTCL and TSTRANSCO to take steps to provide A/R feature
on 220 kV Sedam – Tandur inter-state line at their respective
ends at the earliest.
KPTCL/
TSTRANSCO
KPTCL Mail dated 16.12.2017:
Carrier protection is to be restored. B/U OC and EF relay is to be replaced by M-II distance
relay. Required materials like wave trap, M-II distance relay are already supplied. The work will
be taken up on top priority through GE Ltd. --- Pending
Review Meeting dated 19.12.2017:
TSTRANSCO informed that they have kept A/R in service from Tandur end. KPTCL informed that
the works relating to put A/R in service are going on at their Sedam SS, and assured that it
would be put into service by February, 2018.
Pending
[with KPTCL]
25-12-2015 at 3:01
hrs
51/II/6 PGCIL (SR-I)/ APTRANSCOTripping of 400kV Sattenapalli-
Vijayawada line
Pending
[with PGCIL (SR-I)]
1. PGCIL (SR-I), in co-ordination with APTRANSCO, to address
the problem with CB at the earliest opportune time.
2. APTRANSCO to take steps to replace the faulty Event
Logger at Vijayawada (Nunna) SS.
Line tripped due to operation of over voltage protection
at Vijayawada end and Direct Trip was received at
Sattenapalli end
Annexure-II
Page 4 of 47
APTRANSCO mail dated on 31-08-2016:
To avoid the unwanted malopeartions due to the external LBB trip initiation from PGCIL, Vide
letter Dt: 04-08-2016, APTRANSCO has requsted the PGCIL to arrange the Master trip relay and
breaker contacts of ICT-1 &2 LV side to enable the internal LBB feature in the Busbar protection
scheme at 220kV Gooty Switching station. Waiting for the PGCIL response.
APTRANSCO mail dated on 15-11-2016:
To avoid the unwanted maloperations due to the external LBB trip initiation from PGCIL, vide
letter Dt: 04-08-2016, ARTRANSCO has requested the PGCIL to arrange the Master trip relay and
breaker contacts of ICT-1&2 LV side to enable the internal LBB feature in the Busbar protection
scheme at 220kV Gooty Switching station. Waiting for the PGCIL response.
APTRANSCO mail dated on 20-12-2016:
Waiting for the PGCIL response.
APTRANSCO mail dated 04.03.2017 & 24.05.2017.
SRPC is requested to coordinate with PGCIL in takind necessary action.
APTRANSCO mail dated 20.09.2017 & 22.11.2017
PGCIL may be requested to take necessary action
APTRANSCO maild ated 15.12.2017:
1. Cable healthiness checked and found ok. But it is proposed to replace the cable with armored
cable. --Completed
2. After replacing the cable contactors will be removed so as to avoid unwarrented delays in
transmitting trigging signal to the central unit . ---Pending
Review Meeting dated 19.12.2017:
APTRANSCO informed that replacement of the existing cable with armoured cable and
subsequent removal of cable contactors would be completed by 31.12.2017. In this regard,
PGCIL (SR-I) also assured that they would render all required help from their side to complete
the stated works in time.
APTRANSCO Mail Dated 30.01.2018:
New armoured cable is laid from 220 kv Gooty (AP) to 400/220 kv Gooty (PGCIL) for replacing
the existing cable connected to ICT-2.PGCIL is requested to provide spare contacts from trip
relays of 315 mva LV-1 and LV-2 for providing internal CB failure in busbar protection scheme.
APTRANSCO Mail Dated 24.04.2018 & 24.05.2018:
As requested by PGCIL the busbar drawings Were submitted for providing spare contacts from
trip relays of 315 mva LV-1 and LV-2 for providing LBB in busbar protection scheme.
PGCIL (SR-I) mail dated 20.06.2018:
220kV CB LBB protection (Stand alone protection) available at PGCIL end is to protect ICT in case
of non tripping of CB. It is opined that stand alone protection is better than new LBB logic
proposed by APTRANSCO in Busbar schme. The reason for mal-operation of 220kV Bus on
24.06.2016 is mainly due to cable issue. The problem shall be solved once we replace, this
suspected cable betweem POWERGRID & APTRANSCO.
56/III/4 Tripping of 220 kV Sedam-
Tandur line
03-06-2016
at 21:52 hrs
Line tripped on B-phase to earth fault. Auto-reclose is
not enabled for line.
KPTCL and TSTRANSCO to fast-track providing A/R on 220 kV
Sedam – Tandur line, and furnish an action plan of providing
the same by next PCSC meeting (PCSC-57).
KPTCL/
TSTRANSCO
KPTCL Mail dated 16.12.2017:
Carrier protection is to be restored. B/U OC and EF relay is to be replaced by M-II distance
relay. Required materials like wave trap, M-II distance relay are already supplied. The work will
be taken up on top priority through GE Ltd.
Review Meeting dated 19.12.2017:
TSTRANSCO informed that they have kept A/R in service from Tandur end. KPTCL informed that
the works relating to put A/R in service are gonig on at their Sedam SS, and assured that it
would be put into service by February, 2018.
TSTRANSCO MAIL DATED 20.01.2018:
As discussed in the review meeting on 19-12-2017, A/R is kept in service from
Tandur(TSTRANSCO) end.---Pending
TSTRANSCO MAIL DATED 19.03.2018:
Issue is not pending from TSTRANSCO side.
Pending
(With KPTCL)
APTRANSCO/
PGCIL (SR-I)
Pending [ with
PGCIL (SR-I) ]
24-06-2016 at 16:04
hrs
LBB protection got operated for 400/220kV ICT-2
breaker which had resulted in tripping of 220kV Bus-2 at
220kV Gooty Substation
Tripping at 220 kV Gooty
Substation of APTRANSCO
56/II/13 1.APTRANSCO to check the healthiness of the connecting
cable between Gooty (PGCIL) and Gooty (APTRANSCO), and
replace it, if required.
2.APTRANSCO to ensure that the distributed architecture
employed in implementing busbar protection at their Gooty
220 kV SS does not introduce any unwarranted delays in
transmitting the triggering signals to the Central Unit.
Annexure-II
Page 5 of 47
57/I/1 Complete outage of 220 kV
Karwar Substation of KPTCL
12-07-2017
at 11:36 hrs
Triggering incident was failure of R phase PT in Bus-1 at
220kV Karwar substation. 220kV Kaiga-Kodasalli tripped
during the incident. Also bus shut down occurred at
Kadra and Kodasally stations.
1.NPCIL (KAPS) to disable DefiniteTime O/C relay, and put in
its place by IDMT O/C relay for backup protection on both
220 kV Kaiga – Kadra line and 220 kV Kaiga – Kodasalli line at
Kaiga end.
2.KPTCL to put bus bar protection in service at their 220 kV
Karwar SS at the earliest.
3.KPCL/ KPTCL to implement Weak In-feed Logic with Echo
feature enabled by Under Voltage (27) element on Kadra –
Karwar lines 1 & 2.
4.KPTCL to furnish equipment failure report of the current
incident to PSE&TD Division of CEA with a copy marked to
SRPC.
KPTCL/ KPCL/
NPCIL (KGS)
NPCIL(KGS) mail dated on 03-12-2016 & 29.11.2017:
1.The 200 ms Definite time DEFR element in both Kaiga Kadra and Kaiga Kodasally lines were
disabled. IDMT DEFR is retained. --- Completed
2. --- Pending
3. --- Pending
4. --- Pending
KPTCL Mail dated 16.12.2017:
2) Bus-bar protection panel is supplied under R&U. Replacement work will be taken up after
priority Sub stations.
--- Pending
3] Weak end Infeed logic available in new relays supplied; Will be enabled During R&U works. ---
Pending
4] Equipement failure reports are being sent to CEA regularly.
--- Completed
Review Meeting dated 19.12.2017:
2. KPTCL informed that the works relating to providing BBP are targeted to be completed by
March, 2018. --- Pending
3. KPTCL informed that since the line is a double circuit, there may not be need for
implementing Weak Infeed logic with Echo feature at Karwar end. However, the same would be
looked into w.r.t. the newly commissioned NR's at Karwar, and final action taken would be
informed by March, 2018.
-- Pending
Pending
[with KPCL &
KPTCL]
KPTCL Mail dated 25.06.2017:
In Kadra for all the lines New Numerical Distace protection relay commissioned in Dec 2016. The
enabling of weak Infeed logic with echo system is pending with KPTCL RT Hubli division
APTRANSCO mail dated on 20-12-2016:
Issue was addressed to the concerned for necessary action.
APTRANSCO mail dated on 24-05-2017:
Meeting was conducted and the relays procurement for all the loctions is under progress.
APTRANSCO mail dated on 20-10-2017 & 22.11.2017:
Relays procurement for all the locations is under progress.
APTRANSCO Mail dated 15.12.2017:
Technical bids opened. PQ evaluation under progress . Price bids expected to open in next
week.
PGCIL (SR-I) Mail dated 15.12.2017:
LDP relays procurement is under process. Procurement will be completed by Feb-2018. TPCIL
has to give written confirmation for LDP relay procurement. For want of written confirmation
from TPCIL, PGCIL approving authority has withheld the LDP proposal.
Review Meeting dated 19.12.2017:
PGCIL (SR-I) informed that they are waiting for written confirmation from TPCIL to complete
procurement of LDP relays. To this, PCSC forum asked TPCIL to submit written confirmation to
PGCIL (SR-I) by 29.12.2017. PGCIL (SR-I) assured that with receipt of above confirmation from
TPCIL by Dec, 2017, they would be able to complete the work by FEbruary, 2018.
APTRANSCO informed that they would be able to implement LDP from their & APGENCO side by
April, 2018.
In this regard, PCSC forum made it clear that the recommendation is about providing LDP as
both Main-I & Main-II relays on all stated lines in Nellore Complex, ans asked all stakeholders to
ensure & comply with the same.
APTRANSCO MAIL DATED 30.01.2018
Technical & financial bids are opened. Tenders will be awarded shortly.
57/II/9 Tripping of 400 kV Nellore (PG) -
NPS line-1, 400 kV
Krishnapatnam-Nellore (AP) lines
-1&2 and 400kV NPS - MEPL line
18-07-2016
at 19:05 hrs
Triggering incident was snapping of Y phase conductor in
400kV Nellore (PG) - NPS line-1. Distance relay at
Krishnapatnam end over-reached in Zone-1, and
resulted in tripping of 400kV Krishnapatnam – Nellore
(AP) lines - 1&2 from Krishnapatnam end. Distance relay
at MEPL over-reached and resulted in tripping of MEPL-
NPS line from MEPL end.
PGCIL (SR-I), TPCIL, MEPL, SEL, SGPL, APTRANSCO, APGENCO
and SDSTPS to implement line differential protection on all
400 kV transmission lines (of length less than 50 km)
emanating from Nellore PS, Nellore (PG) SS, and Nellore (AP)
SS. [It may be noted here that the cut-off length of 50 km has
been specified with a view to exclude only long transmission
lines].
APGENCO/
PGCIL(SR-I)/
TPCIL/MEPL/SEL/
SGPL/ APTRANSCO
Pending
Annexure-II
Page 6 of 47
APTRANSCO Mail Dated 24.04.2018:
ABB make LDP relays inspection is completed. SNEIDER make LDP relays inspection yet to be
completed. Delivery of relays expected in the 1st weak of May-2018.
APTRANSCO Mail Dated 24.05.2018:
SNEIDER make LDP relays inspection yet to be completed.Delivery of relays expected in the
month of june 2018.
PGCIL (SR-I) mail dated 20.06.2018:
PGCI(SR1) procuring LDP relays for retrofitting of Main-1&2 distance relays. Tenders are invited
from bidders & tender floated. Technical bid opening in this week.
APTRANSCO Mail Dated 26.06.2018:
ABB make LDP relays are delivered. Schneider make LDP relays inspection to be offered by the
company.
APTRANSCO Mail Dated 25.07.2018:
schneider LDP relays inspection yet to be offered by the company.
APTRANSCO Mail Dated 25.09.2018:
ABB make LDP relays for Main-1 protection were delivered earlier and schneider make LDP
relays for Main-2 protection are delivered in this week.
63/II/9 Tripping of 400 kV YTPS-BTPS
line and 400 kV BTPS-JSWEL line
14-03-2017 at 19:11
hrs
R-phase to earth had occurred in 400kV BTPS-JSWEL line
and protection issued a 3 phase trip
1. JSWEL to follow file naming terminology provided by
SRPC for various tripping files uploaded in SRLDC’s
TMS portal.
2.JSWEL to furnish reasons for AR-BLOCK observed
during the instant tripping and remedial action taken
by them to keep A/R in service.
3. KPCL to configure DR & EL properly to record OVR
Stage-I & Stage-II protections at their BTPS station.
KPCL/ JSWEL Status received vide mail dated 14.12.2017:
1. JSWEL will follow the file naming terminology provided by SRPC during future uploads -----
Completed
2. Auto-reclosure is in service for JSW BTPS line. The reason for AR-Block was due to carrier fail
signal which was after the fault clearance. As per the attached event list, the fault occurred at
7:11:21:550 PM & the AR block appeared around 7:11:21:586 PM, after the clearance of the
fault at around 7:11:21:583 PM (3PH-TRIP) -----Completed
3. --- Pending with KPCL
Review Meeting dated 19.12.2017:
3. KPCL informed that DR's & EL's had been configured for OVR (Stage-I & Stage-II) protections
at their BTPS sttaion, and the exact date of completion of the same would be intimated soon.
JSWEL Status received vide mail dated 01.03.2018:
1. JSWEL will follow the file naming terminology provided by SRPC during future uploads.
2. Auto-reclosure is in service for JSW BTPS line. The reason for AR-Block was due to carrier fail
signal which was after the fault clearance. As per the attached event list, the fault occurred at
7:11:21:550 PM & the AR block appeared around 7:11:21:586 PM, after the clearance of the
fault at around 7:11:21:583 PM (3PH-TRIP)
Pending
57/II/9 Tripping of 400 kV Nellore (PG) -
NPS line-1, 400 kV
Krishnapatnam-Nellore (AP) lines
-1&2 and 400kV NPS - MEPL line
18-07-2016
at 19:05 hrs
Triggering incident was snapping of Y phase conductor in
400kV Nellore (PG) - NPS line-1. Distance relay at
Krishnapatnam end over-reached in Zone-1, and
resulted in tripping of 400kV Krishnapatnam – Nellore
(AP) lines - 1&2 from Krishnapatnam end. Distance relay
at MEPL over-reached and resulted in tripping of MEPL-
NPS line from MEPL end.
PGCIL (SR-I), TPCIL, MEPL, SEL, SGPL, APTRANSCO, APGENCO
and SDSTPS to implement line differential protection on all
400 kV transmission lines (of length less than 50 km)
emanating from Nellore PS, Nellore (PG) SS, and Nellore (AP)
SS. [It may be noted here that the cut-off length of 50 km has
been specified with a view to exclude only long transmission
lines].
APGENCO/
PGCIL(SR-I)/
TPCIL/MEPL/SEL/
SGPL/ APTRANSCO
Pending
Annexure-II
Page 7 of 47
64/I/1 Complete outage of North
Chennai TPS STG-2
24-04-2017
at 21:02hrs
Tripping of evacuating lines due to fault led to tripping of
Units
64/I/2 Complete outage of North
Chennai TPS STG-2
25-04-2017
at 18:27hrs
Tripping of evacuating lines due to fault led to tripping of
Unit
64/I/3 Complete outage of North
Chennai TPS STG-2
26-03-2017
at 21:09 hrs
Tripping of evacuating lines due to fault led to tripping of
running Unit at NCTPS Stg-2
TANTRANSCO MAIL DATED 22.05.2018:
Existing Porcelain insulators of all other 400kV feeders are being replaced with Polymer
insulators in a phased manner. Timeline: Sep-2018. Detailed plan of action will be submitted.
TANTRANSCO MAIL DATED 08.06.2018:
Existing Porcelain insulators of all other 400kV feeders are being replaced with Polymer
insulators in a phased manner. Timeline: Sep-2018. Detailed plan of action will be submitted.
TANTRANSCO MAIL DATED 23.07.2018:
Existing Porcelain insulators of all other 400kV feeders are being replaced with Polymer
insulators in a phased manner. Timeline: Sep-2018.
TANTRANSCO MAIL DATED 11.09.2018:
Existing Porcelain insulators of all other 400kV feeders are being replaced with Polymer
insulators in a phased manner. Timeline: Dec-2018.
Status received vide TANTRANSCO mail dated 15-06-2017 & 04.08.2017 & 18.09.2017 & 12-12-
2017:
1. All the Porcelain insulators of 400kV NCTPS-II - Vallur feeders-1&2 were replaced with
Polymer insulators by 20.05.2017. -----Completed
2. Existing Porcelain insulators of all other 400kV feeders are being replaced with Polymer
insulators in a phased manner.
--- Pending
PGCIL (SR-II) Mail dated 11-12-2017:
Pertaining to POWERGRID all the porceleing insulators in the polluted streches has been
completed. - Completed.
Review Meeting dated 19.12.2017:
TANTRANSCO informed that a total of 597 insulators ahd alreeady been replaced, and the total
replacement would take another 9-month period.
In this regard, TANTRANSCO was asked to furnish detailed plan of action regarding replacement
of insulators on all 400 kV lines owned by them in Chennai area.
TANTRANSCO MAIL DATED 25.01.2018:
Existing Porcelain insulators of all other 400kV feeders are being replaced with Polymer
insulators in a phased manner. Timeline: Sep-2018. Detailed plan of action will be submitted.
TANTRANSCO MAIL DATED 29.08.2018:
Existing Porcelain insulators of all other 400kV feeders are being replaced with Polymer
insulators in a phased manner. Timeline: Sep-2018.
TANTRANSCO/
PGCIL(SR-II)
TANTRANSCO and PGCIL (SR-II) to take steps to complete
insulator replacement works on the 400 kV lines owned by
them in Chennai area within 3 months.
Pending
[with
TANTRANSCO]
Annexure-II
Page 8 of 47
1. --- Pending with TSGENCO
PGCIL (SR-I) Mail dated 15-12-2017:
2). TOR feature in MiCOM P444 relay enabled for 400kV KMM-KTPS lines at Khammam end. DT
send on TOR trip is not as per protection philosopy. However if SRPC/SRLDC gives separate
instructions exclusively for this line, the same shall be imoplemented after getting our CC
approval. --- Pending
3). At Khammam SS all DR & ELs are time synched. --- Completed.
4). --- Pending
TSGENCO Mail dated 18.12.2017:
1). If the auto reclose function dead time kept same at both ends as 1 sec uniformly. In case of
persistent fault, it leads to feed the fault from both ends and cause the generator breaker
switching on to high fault current and chances of pole slip. To avoid this time differentiated A/R
scheme to be implemented. In KTPS 400KV Line –I & II at KTPS end dead time is 1.2sec and at
KMM end it is 1sec.
In our relay 7SA522 does not have the adaptive dead time function A/R. Hence, it is requested
to send DT in case of on 3-phase trip and A/R unsuccessful at KMM end to avoid reclose
attempt from KTPS end after dead time (1.2Sec) for persistent faults.
We communicated to M/s Siemens to upgrade the firmware version regarding adaptive dead
time.
Hence, it is requested to review these settings to reduce the stress on Generating Station ---
Completed
Review Meeting dated 19.12.2017:
2. It was made clear to PGCIL (SR-I) that this is a specific case of those 400 kV lines where one
one of the ends is a generating station, and the other end is grid-connected substation having
TOR feature in line protection relays. The said recommendation of enabling TOR along with
sending DT to the other end is basically to ensure safety of Generating Units at the other end.
Accordingly, PGCIL (SR-I) was asked to take steps to ensure the same. --- Pending
4. PGCIL (SR-I) informed that shutdown was availed by TSGENCO on 14.12.2017, and all issues
relating to PLCC including end-to-end testing were carried out. --- Completed
PGCIL (SR-I) mail dated 20.06.2018:
2. Please mention clearly which feature to be enaled at KMM end(DT send feature on TOR or
DT send feature while 3-ph trip). SRPC may advise TS TRANSCO for arrangieing OEM (MiCOM
p444 relay) service engineer for configuration & implementation of DT send for TOR trip, as the
feature is no where implemented in POWERGRID-SR1.--- Pending
4. 400kV KMM-KTPS-1 line PLCC system checked & End to end code transmission checked on
19.01.2018 & found ok. ---Completed
08-06-2017 at 18:32
hrs
Lines – 1 & 2 tripped on B-phase to earth faults Pending
[with
PGCIL (SR-I)]
Tripping of 400 kV Khammam –
KTPS lines – 1 & 2
TSGENCO/
PGCIL (SR-I)
1. TSGENCO to keep uniform A/R dead-time of 1 sec on the
lines emanating from their KPTS station.
2. PGCIL (SR-I) to enable Trip-on-Reclose (TOR) functionality
for Zone-2 faults for Khammam – KTPS lines at Khammam
end, if such a feature is available in the concerned relay, and
to configure it for sending Direct Trip (DT) Command to KTPS
end.
3. PGCIL (SR-I) to set right time-sync issues w.r.t. Khammam
end Event Loggers on Khammam – KTPS lines.
4. For 400 kV Khammam – KTPS line-1, PGCIL (SR-I), in
coordination with TSGENCO, shall carry out the following:
(i) End-to-end communication for DT/ permissive & other
signals may be ensured by testing at both the ends.
(ii) Healthiness of PLCC system components (hardware and
software) at both ends shall be checked and faulty
components shall be repaired/ replaced.
66/ II/ 8
Annexure-II
Page 9 of 47
66/ II/ 10 Tripping of 400/ 220 kV ICT’s – 3
& 4 at Ramagundam STPS
11-06-2017
at 19:46hrs
Triggering incident was failure of 220 kV
B-phase LA in ICT-3 LV extension feeder (220KV line-2)
at Malayalapalli substation
1. NTPC to disable high-set of DEFR on the 220 kV lines
emanating from their Ramagundam STPS.
2. NTPC/ TSTRANSCO to provide Line Differential Protection
(with or without pilot) on 220 kV Ramagundam –
Malayalapalli lines – 1 & 2 & 3.
NTPC-Ramagundam/
TSTRANSCO
NTPC mail dated 07.12.2017:
1. High set DEFR on 220 KV lines is disabled ----Completed
2. ---- Pending
Review Meeting dated 19.12.2017:
TSTRANSCO informed that the works are under progress, and are targeted to be completed in 3
months time.
TSTRANSCO MAIL DATED 20.01.2018:
Line Differential Protection will be provided within 3 months i.e., by end of March, 2018.
TSTRANSCO MAIL DATED 20.04.2018:
Line Differential Protection relays are under procurement and will be provided by end of May,
2018.
TSTRANSCO MAIL DATED 17.05.2018:
Line Differential relays will be supplied to site by manufacturer by end of May, 2018 and
erection will be completed by end of June, 2018.
Pending
1. --- Pending
2. --- Pending
3. --- Pending
Status received vide NPCIL mail dated 29-11-2017:
4. The event logger(ESCADA) has inherent time resolution of 10 millisecond for digital inputs. In
future higesht resultion event logger history will be extratced for submission to grid authorities..-
-NPCIL-KAIGA ----Completed
Review Meeting dated 19.12.2017:
1). Kadra-kaiga 220KV line tripped on both end in Zone-1 distance protection. Fault distance is
0.9KM from kadra end. Kodasalli-Kadra 220KV tripped at Kodasalli end only in Zone-1 fault.
Reason for tripping is the both Kadra-kodasalli, kadra-Kaiga line are in same tower, hence same
fault reflected adjuscent line. Because of no Bus source, Kadra end relay stopped to detect,
hence Kadra end breaker was intact.
---- Completed
2). Issue relating to downloading of DRs & Els at Kadra PH rectified. --- Completed
3). KPCL informed that they have planned to take up providing double-bus operation at their
220 kV Kadra PH, 220 kV Gersoppa PH, and 220 kV Raichur TPS through PSDF funding, and DPR
for the same is under preparation. After obtaining approval of the same from their
management, other activities inluding tenders floating, approaching PSDF would be taken up.
All these activites are targeted to be completed within 2 years.
--- Pending
68/I/2 Pending
[with KPCL]
KPCL/ NPCIL (KGS)1. KPCL to investigate the reasons for non-tripping of 220 kV
Kadra – Kodasalli line from Kadra end by any of the Main
protection relays, and opening of only B-ph pole at Kodasalli
end, and furnish an action taken report on the same.
2.KPCL to sort out issues relating to downloading of DR’s &
EL’s at Kadra PH at the earliest.
3. KPCL to use both the 220 kV buses as main buses under
normal operation, and to go for single bus operation only
during emergencies at their Kadra PH.
4. NPCIL (KGS) to configure time resolution of Event Loggers
to milli seconds at their Kaiga GS.
Triggering incident was tripping of 220 kV Kadra-
Kodasalli and 220 kV Kadra-Kaiga line. There was no
generation at Kadra in antecedent condition.
25-09-2017
at 11:41hrs
Complete outage of 220 kV
Kadra Power Station of KPCL.
Annexure-II
Page 10 of 47
69/I/2 Complete outage of 400kV TPCIL
station
30-10-2017 at 21:37
hrs
400kV TPCIL - Nellore line-1 got tripped at TPCIL end
during failure of LA of Station Transformer-2 at TPCIL.
Running Units at TPCIL got tripped due to loss of
evacuating line. 400kV TPCIL - Nellore PS line-2 was
under emergency shutdown
1. TPCIL to configure DEF protection such that it remains in
blocked condition as long as Distance Protection is active, and
becomes active only when distance protection does not
pickup.
2.PGCIL (SR-I) to ensure healthiness of Carrier
communication, and the set PUP mode of carrier aided
scheme operates reliably on TPCIL lines 1 & 2.
TPCIL/
PGCIL (SR-I)
Review Meeting dated 19.12.2017:
PGCIL (SR-I) informed that they are waiting for written confirmation from TPCIL to complete
procurement of LDP relays. To this, PCSC forum asked TPCIL to submit written confirmation to
PGCIL (SR-I) by 29.12.2017. PGCIL (SR-I) assured that with receipt of above confirmation from
TPCIL by Dec, 2017, they would be able to complete the work by February, 2018.
APTRANSCO informed that they would be able to implement LDP from their & APGENCO side by
April, 2018.
In this regard, PCSC forum made it clear that the recommendation is about providing LDP as
both Main-I & Main-II relays on all stated lines in Nellore Complex, ans asked all stakeholders to
ensure & comply with the same.
PGCIL (SR-I) mail dated 20.06.2018:
PGCI(SR1) procuring LDP relays for retrofitting of Main-1&2 distance relays. Tenders are invited
from bidders & tender floated. Technical bid opening in this week.
Pending
69/III/3 Tripping of 400 kV Kurnool(PG) –
Kurnool(AP) line-2
02-10-2017 at 02:03
hrs
Line tripped on B-ph to ground fault. A/R was
unsuccessful at both Kurnool (AP) and Kurnool (PG)
ends.
1) PGCIL (SR-I) and APTRANSCO to provide for Line
Differential Protection as both the Main protections on 400
kV Kurnool (AP) – Kurnool (PG) lines 1 & 2 lines.
2) APTRANSCO to furnish an action taken report w.r.t.
resolving A/R non-operation at Kurnool-AP end for the
subject trippings and configure EL for capturing PDR
operation at their 400 kV Kurnool-AP SS.
APTRANSCO/
PGCIL (SR-I)
APTRANSCO maild ated 30.01.2018:
1. Pending...
2.A/R scheme on 400kV Kurnool (PGCIL) feeder-2 will be checked after getting LC.
APTRANSCO maild ated 24.04.2018 & 24.05.2018 & 26.06.2018:
1. Pending...
2. B Ph auxilary trip relay is found defective. The same is to be replaced by M/S PGCIL. Ii) PD
relay event is configured in the EL as per the recommendation.
PGCIL (SR-I) mail dated 20.06.2018:
1. ---Pending
2. PGCIl(SR-1): B-Ph auxiliary relay problem rectified at Narnoor end by replacing relay contact. --
-Completed
APTRANSCO Mail Dated 25.07.2018:
Lines and Bays pertain to PGCIL
Pending
69/III/7 Tripping of 220 kV Ragulapadu –
Alipura line
12-10-2017 at 01:30
hrs
Line tripped on B-Ph to earth fault. A/R was successful at
Regulapadu and breakers at Alipura end got tripped.
KPTCL and APTRANSCO to sort out issues relating to
incongruence in denoting R, Y, B phases of the electric supply
on their respective sides.
APTRANSCO/ KPTCL APTRANSCO maild ated 15.12.2017:
APTRANSCO would extend support and requirements if any ,for the rectification proposed by
KPTCL.
Review Meeting dated 19.12.2017:
It was noted that the original Gooty - Lingapur line got LILOed at BTPS, Alipura, and Ragulapadu.
It was also noted that Phase Discrepancy is being observed in Ragulapadu - Alipira section only.
When enquired about the same, KPTCL informed that they would examine the issue in detail,
and would inform the action lan proposed by next PCSC-71 meeting. On this, APTRANSCO was
also asked to render all help required from their side to KPTCL.
APTRANSCO maild dated 30.01.2018:
APTransco world extend required support .
APTRANSCO maild dated 24.04.2018 & 24.05.2018 & 26.06.2018:
AP Transco would extend required support for attending, phase discrepancy issue in ragulapadu-
Alipura line by KPTCL.
APTRANSCO Mail Dated 25.07.2018:
To be attended by KPTCL as discussed in 75th PCSC meeting
Pending [ with
KPTCL ]
Annexure-II
Page 11 of 47
72/II/4 Tripping of 400/ 220 kV Hoody
ICT-3 and 400 kV Kolar-Hoody
line-2
14-01-2014 at 17:42
hrs
Triggering incident was failure of Y-phase lightning
arrestor of 400kV Hoody-Kolar line-2 at Hoody end due
to which 400 kV Kolar – Hoody line-2 tripped on
operation of distance protection. At the same time
400/220 kV, 500 MVA ICT-3 at Hoody also tripped on
earth fault protection.
For the Hoody – Kolar line-2, the following shall be carried
out by KPTCL, in coordination with
PGCIL (SR-II):
(i) End-to-end communication for DT/ permissive & other
signals may be ensured by testing at both the ends.
(ii) Healthiness of PLCC system components (hardware and
software) at both ends shall be checked and faulty
components shall be repaired/ replaced.
KPTCL to keep A/R in service on Hoody – Kolar line-2 after
verifying the healthiness of PLCC communication.
KPTCL / PGCIL (SR-II) Yet to be informed Pending
73/IV/3 Tripping of 400 kV Pondicherry-
S.V.Chatram line.
10-03-2018 at 17:58
hrs
Line tripped at SVChatram end only and was holding
from Puducherry. No fault was observed from DR of
S.V.Chatram. Suspected PLCC mal-operation.
For the line under consideration, the following shall be
carried out by PGCIL (SR-II), in coordination with TSTRANSCO:
(i) End-to-end communication for DT/ permissive & other
signals may be ensured by testing at both the ends.
(ii) Healthiness of PLCC system components (hardware and
software) at both ends shall be checked and faulty
components shall be repaired/ replaced.
TANTRANSCO/ PGCIL (SR-II) TANTRANSCO Mail dated 22.05.2018 & 08.06.2018:
PLCC LINK will be checked on availing LC
TANTRANSCO Mail dated 24.07.2018:
PLCC link checked and defective card at Puducherry end is to be replaced.
TANTRANSCO Mail dated 29.08.2018 & 11.09.2018:
PLCC link checked and defective card at Puducherry end is to be replaced.
Pending
74/I/1 Complete outage of 220 kV
Sedam Substation
01-04-2018 at
19:56hrs
Triggering incident was fault in 220 kV Sedam-Tandur
line. 220 kV Sedam-Shahapur, 220 kV Sedam-RTPS lines -
1&2 and 220 kV Sedam-Tandoor line tripped from RTPS,
Shahpur and Tandoor. Tripping of incoming lines to
Sedam caused shut down at Sedam Sub Station resulting
in complete outage of the station.
KPTCL and TSTRANSCO to establish PLCC link on 220 kV
Sedam – Tandur line, and implement A/R using PLCC carrier
communication.
KPTCL/TSTRANSCO TSTRANSCO mail dated 20.06.2018:
Will coordinate with KPTCL and arrange for procurement of PLCC panel at Tandur end.
pending
KPTCL Mail dated
It is observed that the loop wire(i.e from BCU to CB closing coil)missed for A/R close operation
to CB remote close and it was given on 21.04.2018 in the presence of PGCIL authorities.
NPCIL (KGS) mail dated 25.06.2018:
1) KGS agreed to disable sending of DT to remote ends upon 86X operations for any line
protection operation at its 400kV KGS within one month.
2) KPTCL agreed to resolve the PLCC issues at Guttur SS at the earliest.
NPCIL (KGS) mail dated 18.07.2018:
Clarification on proposed modification for disabling DT from SRLDC & SRPC got on 05.07.2018.
Will be implemented within a month.
NPCIL (KGS) mail dated 10.09.2018:
Will be implemented after approval of line shutdowns. Line shutdown request forwarded for
discussion in 146 th OCC . Planned on 13/9 (Kaiga -Guttur CKT-1)
17/9(Kaiga -Guttur CKT-2),19/9(Kaiga -Narendra CKT-1) & 21/9 (Kaiga -Narendra CKT-2)
NPCIL (KGS) mail dated 24.09.2018:
1. Disabling of sending - DT to remote ends upon 86X operations for Kaiga -Guttur CKT-1 & CKT -
2 is implemented on 15/09/2018 & 17/09/2018 respectively.
---- Completed
2. Pending
KPTCL/
NPCIL [KGS]1) NPCIL (KGS) to take steps to disable sending of DT to
remote ends upon 86X operation for any line protection
operation at its 400 kV KGS.
2) KPTCL to resolve PLCC issues on 400 kV Guttur –Kaiga lines
at the earliest.
Pending400 kV Guttur-Kaiga-1 Breaker was in lock-out condition.
It was intended to take Kaiga line-1 on tie CB. While
carrying out this operation bus bar protection operated
at Guttur resulting in tripping of all connected elements.
17-03-2018 at 08:25
hrs
Multiple trippings at 400 kV
Guttur Substation.
73/II/7
Annexure-II
Page 12 of 47
76/I/2 Complete outage of 220 kV
Sedam Station
19-06-2018 at 1:41
hrs
Triggering incident was B-phase to ground fault in 220
kV Sedam – RTPS line-2.
KPTCL and KPCL to provide PLCC carrier communication &
Auto-reclosure (A/R) on all 220 kV lines emanating from
Sedam SS at their respective ends.
KPTCL/ KPCL Yet to be informed Pending
76/II/9 Tripping of 230 kV Thiruvalam -
Chittoor line
13-06-2018 at
18:55hrs
Y-phase to earth fault occurred in line. At 230 kV
Tiruvalam end, breaker was under lockout leading to
operation of LBB protection.
1) TANTRANSCO to provide double-bus operation at their 230
kV Thiruvalam SS.
2) APTRANSCO to replace the existing static relays with
suitable numerical relays for various line protections at their
220 kV Chittoor SS.
TANTRANSCO/ APTRANSCO 1) TANTRANSCO Mail dated 29.08.2018 & 11.09.2018:
Material supplied and work to be taken up ---Pending
2) APTRANSCO Mail dated 24.09.2018:
The static relays were replaced with Numerical relay on all 220 kV feeders at 220 kV SS chittoor.--
-Completed
Pending
52/I/2
(GD)
Complete outage of 220 kV
Yerraguntla substation and
tripping of running Units at
Rayalaseema TPS
21-02-2016 at 10:39
hrs
HV B-Ph Current transformer of 100MVA Power
Transformer -1 failed resulting into a bus fault on 220KV
Bus-1. Unit-1 and Unit-5 at RYTPS tripped during the
fault at Yerraguntla substation
1. APGENCO to check associated logic for lube oil pump for
correct operation under transient low voltage conditions at
Rayalaseema TPS, Unit-1.
2. APGENCO to keep appropriate time delay/ fault ride
through delay (typically 2 sec) in VFD speed sensor relay at all
its generating Units including Rayalaseema TPS Units.
APGENCO Mail received on 27-07-2016:
1.The drop out relays of reducer oil pumps time setting was increased for all mills.So there will
not be any trip under transient low voltage condition.----Complied
2.The recommendation regarding 2 sec time delay will be implemented during unit shut down
and will be intimated immediately after implementation.------Pending
Review Meeting dated 19.12.2017:
It was noted that no APGENCO representative had come to attend the meeting.
Status received vide mail dated 25.09.2018:
Unit - 1: The Drop out relays of Reducer Oil Pumps time setting was increased
for all mills. So there will not be any trip under transient low voltage
condition. Hence it is requested to droo the ooint.
UNIT-5:
APGENCO to keep appropriate time delay/ fault ride through delay
(typically) 2sec in VFD speed sensor relay at all its generating units
including RTPP. The above recommendation was implemented durinq unit shut down and
Hence it is requested to drop the point
Pending
Andhra Pradesh
Annexure-II
Page 13 of 47
57/II/9 Tripping of 400 kV Nellore (PG) -
NPS line-1, 400 kV
Krishnapatnam-Nellore (AP) lines
-1&2 and 400kV NPS - MEPL line
18-07-2016
at 19:05 hrs
Triggering incident was snapping of Y phase conductor in
400kV Nellore (PG) - NPS line-1. Distance relay at
Krishnapatnam end over-reached in Zone-1, and
resulted in tripping of 400kV Krishnapatnam – Nellore
(AP) lines - 1&2 from Krishnapatnam end. Distance relay
at MEPL over-reached and resulted in tripping of MEPL-
NPS line from MEPL end.
APGENCO to furnish a report on the remedial action
implemented w.r.t. overreaching of Krishnapatnam end
distance relays during the tripping of 400 kV Nellore (PG) -
NPS line-1
APGENCO Review Meeting dated 19.12.2017:
It was noted that no APGENCO representative had come to attend the meeting.
APGENCO Mail dated 19.12.2017:
Procurement of relays is under progress
Pending
APGENCO MAIL DATED 20.09.2018:
2 ii) Placing of purchase order is under progress for the work along with the material and the
work is likely to be completed by 25-10-18.
74/I/5 Complete outage of 400 kV
Kalikiri station
25-04-2018 at 16:55
hrs
Triggering incident was Y-phase to ground fault in 400kV
Kalikiri - RYTPP line-2. 400kV Kalikiri- Chittoor lines - 1&2
got tripped from Chittoor end. This resulted in complete
outage of 400kV Kalikiri station.
APGENCO to furnish tripping files (FIR/DR/EL/TR) of an event
involving their system within 24-hrs of occurrence of the
same to SRLDC and SRPC in line with IEGC Regulation 5.2 (r).
APGENCO Status received vide mail dated 25.09.2018:
RTPP Staqg. -lV is ngw gtation anC we were, not alv,afe of the proced,ureg,of trippins repo4s
syb.mission. So the subF!?s,ions,of trippinq,reports submission delayed. ln the mean time.
when it was tried extract the DR file, the data files in the relav were deleted from relav
automaticallv an4 could not be extracted. Hence, the same could not be uploaded to SBPC.
Now we are promptlv uplgadinq the trippirg data within 24 hrs as per IEGC resulation.
Pending
1.APGENCO to furnish compliance report on the
recommendations given by PSAG-9 team that had visited
Srisailam RB PH on 14-15 October, 2014.
2.APGENCO to carry out the following:
(i)Removal of DC earth leakage in station switchyard on
priority basis (latest by 10.12.2017)
(ii)Integration of Station earth-mat and Switchyard earth-
mat.
3. APGENCO to provide for numerical relays (as both Main-I &
Main-II) on all 220 kV feeders emanating from Srisailam RB
PH.
4.APGENCO to put A/R into service on all 220 kV feeders
emanating from Srisailam RB PH.
5.APGENCO to provide for Time Synchronization equipment
at their Srisailam RB PH to synchronize all protection relays
with GPS.
PendingAPGENCO Mail dated 06.03.2018:
1. Complainance report on PSAG -9 recommendations is enclosed in next sheet.
--Completed
2. i ) Attended and removed the earth leakage. --Completed
2 ii) Procurement of material is under progress. --Pending
3. Material received at site. Work will be completed by April 2018. --Pending
4. Will be provided at the time of commissioning of new protection panels. --Pending
5. i) Time synchronization for Unit-4 both MAin- I & II relays was provided through SNTP.
--Completed
ii) Time synchronization for Unit-1,2 ,3,5,6, & 7 RET- 670 Main -II Relays was provided
through SNTP. --Completed
iii) Time synchronization for Unit -1,2,3,5,6, & 7 REG- 670 Main - I & II Relays was provided
through PPM. --Completed
APGENCO Mail dated 25.06.2018:
2 ii) Procurement of material is under progress.
3. New numerical Relay panels erection nad commissioning work is under progress. It will be
completed within two months for all feeders.
4. Work is under progress and it will be completed within two months for all feeders -Pending
APGENCO MAIL DATED 29.08.2018:
1,5. Completed
2 ii) Placing of purchase order is under progress for the work along with the material and the
work is likely to be completed by 30-09-18.
3. COMPLETED -New Numerical Relay panels Erection and Commissioning work completed for
all 220kv feeders. (last feeder completed on 17-08-18 )
4. COMPLETED - A/R provision was provided for all the 220kv feeders. (last feeder on 17-08-
18). However for Nagarjunasagar feeder A/R was kept off, being the feeder between
Generating stations.
APGENCO220kV Srisailam RB – Markapuram S/C line and 220 kV
Srisailam – Podili S/C line tripped on operation of
distance protection. Srisailam Units - 3, 4, 6 and 7 got
tripped during the incident.
09-10-2017 at 14:39
hrs
Multiple trippings at Tripping at
220 kV Srisailam Right Bank
power station
69/II/1
Annexure-II
Page 14 of 47
74/II/21 Tripping of 400 KV Kalikiri –
RYTPP line-2
29-04-2018 at 19:29
hrs
Line tripped on operation of over-voltage protection at
RYTPP and Direct Trip receipt at Kalikiri. The correct
operation of over-voltage tripping could not be validated
as FIR, DR and EL of RYTPP and DR and EL of Kalikiri were
not furnished.
1). APGENCO to furnish detailed report on the reasons for the
tripping of the line including remedial measures taken.
2). APGENCO to ensure that the OVR-settings implemented at
Rayalaseema TPP are as per the SRPC provided settings
issued vide letter dated 01.05.2018, and confirm the same.
APGENCO Status received vide mail dated 25.09.2018:
OVR settinss incorporated as per the Lr.No. CE/IPC&PS/SP/13/
400KV -OVR -SRPC/VOL.OI/ D.No,2001333/ 18: Dt: 04.05.18
Pending
75/I/2 Complete outage of 400 kV
Kalikiri and 400 kV RyTPP, Stage-
V station
16:08 hrs on
11-05-2018
Triggering incident was R-E fault in 400kV RyTPP- Kalikiri
Ckt-1. Auto reclose (A/ R) was successful at Kalikiri end
but didn’t operate at RyTPP end. This led to tripping of
running unit at RyTPP due to tripping of evacuating line
and complete outage of RYTPP. At the same time 400kV
Chittoor-Kalikiri lines - 1&2 got tripped from Chittoor
end on operation of Z3 (mal-operation) resulting in loss
of supply to Kalikiri station.
APGENCO to ensure that A/R functionality implemented on
400 kV RyTPP (Stage-V) – Kalikiri lines – 1 & 2 at RyTPP (Stage-
V) end is healthy and in kept service.
APGENCO Status received vide mail dated 25.09.2018:
RTPP,(9taqe-lU end,iis healthy and kept in service. Hence it is requested to drop all the ahove
points.
Pending
73/I/7 Complete outage of 220 kV Vizag
(Gazuwaka) switching station
27-03-2018 at 16:14
hrs
Triggering incident was R-ph CT failure Bus-Coupler. This
resulted in tripping of all the connected elements due to
operation of bus bar protection.
1) APTRANSCO to furnish equipment failure report of the
current incident (CT blast) to PSE&TD Division of CEA with a
copy marked to SRPC.
2) APTRANSCO to take steps to provide one more thermo-
vision camera to Vizag division for use exclusively on 400 kV
& 220 & 132 kV transmission lines emanating from Kalpaka,
Gajuwaka, VSS, Pendurti and other adjoining substations of
APTRANSCO.
APTRANSCO APTRANSCO Mail Dated 26.06.2018 & 25.07.2018:
i) Vide Lr.No.CE/Tr/SE/Tr/DE/SS/ADE-4/F.No.1/D.No.138/18Dt:20.06.18. Equipment & failure
report communicated to CE(STED),CE/(IC),CEA.
---Complied.
ii) Indent is being processed.---Pending.
APTRANSCO Mail dated 24.09.2018:
ii) Tendering process has been initiated. ---Pending
Pending
76/II/3 Tripping of 400 kV Ghani –
Narnoor line- 2
02-06-2018 at 05:35
hrs
Line tripped on mal-operation of Tie-CB LBB at Narnoor
end and DT receive was received at Ghani
For the subject tripping, APTRANSCO to furnish a detailed
report on the reasons for operation of Tie-CB LBB protection
including remedial measures taken to SRPC.
APTRANSCO APTRANSCO Mail dated 24.09.2018:
LC planned on 20/09/18 for thorough testing
Pending
77/I/4 Complete outage of 400 kV
Hinduja (HNPCL) station
29-07-2018 at 13:20
hrs
Triggering incident was Y-B fault in 400 kV Hinduja - KV
Kota line-2. Simultaneously, 400 kV Hinduja - KV Kota
line-1 and 400kV Hinduja – Kalpaka lines – 1 & 2 also got
tripped due to tripping of remote end breakers i.e., at KV
Kota and Kalpaka end. This resulted in complete outage
of 400kV HNPCL Station. It was stated that the relays at
KV Kota and Kalpaka end had mal-operated due to
improper relay configuration.
APTRANSCO to ensure that in all P444 relays being used in
their network, the PSL logic employed for issuing
instantaneous 3-ph trip upon detection of Zone-2 Start/ Zone-
3 Start for Ph-Ph faults is disabled.
APTRANSCO APTRANSCO Mail dated 25.09.2018:
Instructions were issued to the field to ensure configuration of correct PSL logic in P442/P444
relays in AP system
Pending
Annexure-II
Page 15 of 47
61/III/5 Tripping of 400 kV Khammam -
KTPS line-2
24-12-2016 at 10:52
hrs
Line tripped on B-phase to earth fault. First fault was
persistent for 380 ms. Auto-reclose was successful at
Khammam end during 1st fault. 2nd fault occurred
during re-claim time of breaker hence Khammam end
breakers also got tripped.
1. TSGENCO to implement the SRPC agreed philosophy for
Power Swing Blocking in all distance relays on the feeders
emanating from KTPS.
2. For the line under consideration, TSGENCO to consult
relays OEM to migrate to new versions of Firmware (from
4.68.03 to 4.72.01) and Pset (from 4.63.04 to 4.70.02).
TSGENCO TSGENCO mail dated 30.03.2017:
1. According to SRPC phylosphy power swing block settings are changed to ALL ZONES BLOCK
EXCEPT ZONE1.
---------- Completed
2. M/s. Siemens is requested to depute the service Engineer to update the firm ware of existing
SIPROTEC relays in 400KV switch yard. This work will be completed on or before 15.04.2017.
----------- Pending
TSGENCO mail dated 08.12.2017:
1. --- Completed
2. As this KTPS line-II is being LILOed at KTPS, Stage-VII, those relays would be replaced with line
diff relays. --- Pending
Review Meeting dated 19.12.2017:
As recommeded, TSGENCO was asked to migrate to new versions of firmware in consultation
with relays OEM.
------- Pending
Pending
07-11-2017 at 23:02
hrs
09-11-2017 at 21:57
hrs
12-11-2017 at 20:54
hrs
17-11-2017 at 21:19
hrs
11-11-2017 at 22:02
hrs
12-11-2017 at 23:09
hrs
24-11-2017 at 18:46
hrs
11-12-2017 at 18:49
hrs
18-12-2017 at 19:10
hrs
1. TSGENCO to take steps to replace the existing faulty CVT’s
at Srisalam end on 400 kV Srisailam – Narnoor line at the
earliest.
2. TSGENCO to adopt stipulated OVR, Stage-I gradings on all
400 kV transmission lines emanating from Srisaliam LB.
TSGENCO TSGENCO mail dated 31.07.2018:
1.TSGENCO: Purchase order was placed on 08.03.2018 for procurement of CVT’s & after receipt
of new CVT’s faulty CVT’s will be replaced with new CVT’s. Replacement of faulty CVT's will be
completed by the end of September 2018. ---Pending
2.TSGENCO: TSGENCO was adopted new OVR stage-1 gradings on all feeders issued by SRPC. ---
Complied
Line tripped on operation of over-voltage protection at
Srisailam and Direct Trip was received at Sattenapalli.
Considerable voltage difference was observed between
R, Y & B phases at Srisailam end.
71/II/7
70/II/3
Telangana
70/II/2 PendingTripping of 400kV Kurnool-
Srisailam line
Tripping of 400 kV Narnoor –
Srisailam LB line
Line tripped due to operation of over voltage protection
at Srisailam LB end. Considerable phase difference was
observed between phases at Srisailam end
Pending
TSGENCO mail dated 31.07.2018:
TSGENCO: Purchase order was placed on 08.03.2018 for procurement of CVT’s & after receipt
of new CVT’s faulty CVT’s will be replaced with new CVT’s. Replacement of faulty CVT's will be
completed by the end of September 2018.
TSGENCO: TSGENCO was adopted new OVR stage-1 gradings on all feeders issued by SRPC.
TSGENCOTSGENCO to adopt stipulated OVR, Stage-I gradings for the
400 kV lines emanating from their 400 kV Srisailam LB RH,
and furnish an action taken report w.r.t. mitigating observed
voltage difference among R & Y & B phases
Line tripped on operation of Over-Voltage protection at
Srisailam and Direct Trip was received at Kurnool.
Considerable voltage difference was observed between
R, Y & B phases.
TSGENCO to adopt stipulated OVR, Stage-I gradings for the
400 kV lines emanating from their 400 kV Srisailam LB RH,
and furnish an action taken report w.r.t. mitigating observed
voltage difference among R & Y & B phases.
Tripping of 400 kV Satenapalli-
Srisailam line-1
TSGENCO TSGENCO mail dated 31.07.2018:
TSGENCO: Purchase order was placed on 08.03.2018 for procurement of CVT’s & after receipt
of new CVT’s faulty CVT’s will be replaced with new CVT’s. Replacement of faulty CVT's will be
completed by the end of September 2018.
TSGENCO: TSGENCO was adopted new OVR stage-1 gradings on all feeders issued by SRPC.
Pending
Annexure-II
Page 16 of 47
74/II/2 Tripping of 400 kV Kurnool-
Srisailam line
01-04-2018 at 18:03
hrs
Line tripped on operation of Over Voltage Stg-1
protection at Srisailam and Direct Trip was received at
Kurnool. Considerable difference between Phase
voltages was observed in Srisailam end DR. (Vr-257kV,
Vy-246kV, Vb-239kV)
1). TSGENCO was asked to double—check the faulty CVT’s
and replace them at the earliest.
2). TSGENCO was also asked to implement new OVR gradings
issued vide SRPC letter dated 01.05.2018.
TSGENCO TSGENCO mail dated 31.07.2018:
1. TSGENCO: Purchase order was placed on 08.03.2018 for procurement of CVT’s & after receipt
of new CVT’s faulty CVT’s will be replaced with new CVT’s. Replacement of faulty CVT's will be
completed by the end of September 2018.
2.TSGENCO: TSGENCO was implemented new OVR gradings issued by SRPC.
Pending
74/II/4 Tripping of 400 kV Gajwel -
Shankarapally line-1 and 400kV
Gajwel-Hyderabad line
03-04-2018 at 14:13
hrs
400 kV Gajwel-Shankarapally line-1 tripped due to B-
phase to earth fault (persistent fault). At this instant,
400 kV Gajwel-Hyderabad line also tripped on operation
of over-voltage protection at Gajwel and Direct Trip was
received at Hyderabad.
TSTRANSCO to expedite commissioning of new numerical
relays (with voltage drop-off to pick-up ratio better than
0.97) on all 400 kV lines at their Gajwel SS and implement
OVR (Stage-I & Stage-II) functionality from the numerical
relays.
TSTRANSCO TSTRANSCO mail dated 20.06.2018:
New relays are available at site and will be commissioned by 2nd week of August-2018. Over
Voltage settings will be implemented in the new relays.
Pending
74/II/8 Tripping of 400/220 kV ICT-2 at
Gajwel
11-04-2018 at 5:50
hrs
400/220 kV ICT-2 at Gajwel tripped on mal-operation of
Buchholtz relay.
1). TSTRANSCO was asked to keep the ICT and its mechanical
protections under observation for detecting any slippages.
2). TSTRANSCO was also asked to configure capturing of
mechanical protections of ICT’s in the respective relay’s/
station’s event logger.
TSTRANSCO TSTRANSCO mail dated 20.06.2018:
1. Mechanical protections of ICTs is under observation.
2.New relays are available at site and will be commissioned by 2nd week of August-2018. The
mechanical protection of ICTs will be configured in the new relays.
Pending
Provision of line differential protection for Jurala line 1 & 2 (line length-1.45 KM) feeders at 220 kV Jurala HPS
[Carry-Over from Protection Audit Recommendations]
TSGENCO/ TSTRANSCO PendingPAR/
PCSC-58
The issue was discussed in PCSC-58 meeting held on 18.10.2016, when PCSC forum agreed to de-
link the implementation of the Item from the scope of Protection Audit Recommendations
(PAR), and pursue it as part of PCSC Recommendations.
TSGENCO mail dated 30-05-2017
Procurement of Differential Protection relays is under process and the work will be completed
by the end of November 2017.
TSGENCO mail dated 18-09-2017
Procurement of Line Differential Protection Relays is under process and the work will be
completed by the end of January 2018.
Review Meeting dated 19.12.2017:
TSGENCO informed that they are in constant touch with TSTRANSCO in this regard, and hope to
implement LDP by February, 2018.
TSTRANSCO informed that procurement of LDP relays is under progress, and assured that LDP
would be implemented in 3-months time.
TSTRANSCO MAIL DATED ON 20-01-2018:
The matter is being coordinated with TSGENCO.
TSTRANSCO MAIL DATED ON 05-03-2018:
As a part of implementation of line differential relays for short distance (Jurala PH to Jurala SS)
feeders, procurement of Line Differential Protection Relays are in process and the work will be
completed by the end of June 2018.
TSGENCO mail dated 31.07.2018:
TSGENCO: Purchase Order was placed on 05.06.2018 for Procurement of Line Differential
Protection (LDP) relays and the work will be completed by the end of October 2018
Annexure-II
Page 17 of 47
74/II/18 Tripping of 400 kV Srisailam-
Dindi line-2
24-04-2018 at 17:05
hrs
Line tripped at Srisailam end on operation of distance
protection B-E, Zone-1. There was no tripping at Dindi
end and line was holding from Dindi. B-phase to earth
fault occurred in 400 kV Mamidapally-Dindi line-2 at the
same time.
1) It was noted that tripping of 400 kV Srisailam – Dindi line-2
from Srisailam end for a fault on 400 kV Dindi – Mamidipally
line-2 was a typical case of Zone-1 Over-reach. Accordingly
TSGENCO was asked to review DPR, Zone settings of the
subject line along with checking mutual compensation factor.
TSGENCO was also asked to keep the line under observation
so as to determine the integrity and operation of the distance
protection relay under similar conditions.
2) W.r.t. OVR operation on 400 kV Dindi – Mamidipally line-2
at Dindi end, TSTRANSCO was asked to ensure that they kept
required time delay of 100 msec for OVR, Stage-II operation.
TSGENCO/ TSTRANSCO TSTRANSCO mail dated 20.06.2018:
1. ---Pending.
2. Stage-2 Over Voltage setting time delay is 100msec on 400 kV Dindi – Mamidipally line-2 at
Dindi end. --- Completed
Pending
[with TSGENCO]
Mail received on 21-10-2015:
1) Anti-pumping contactors of all the nine 220KV Lines are in circuit and tested periodically
during AOH works of lines along with other protections.
2) Completed.
3) Possibility to use both the 220kV buses as main bus under normal operation is under review.
Mail recieved on 23-11-2015:
1) Completed
3) Two bus operation for 220kV buses : In place of existing CT switching relays, High speed
manual heavy duty change over switch of sufficient current capacity will be retrofitted to all
feeders at 220kV station and same will be operated manually during changeover of feeder by
one bus to the other and this arrangement may facilitate to put both buses in service. Time
required for this retrofit is around 90days . However, this work will be taken up only after
retrofitting of electromagnetic relays with numerical relays for Main-2 protection of all 220kV
lines, for which work is in progress.
Status received vide mail dated 10-07-2017:
1) --- Completed.
2) --- Completed. Status received vide KPCL mail dated 14.12.2017:
3) DPR for implementation of Two Bus operation for 220kV bus system has been prepared and
proposal is placed for funds from PSDF. After the approval of the DPR, the work is proposed to
be taken up.
Review Meeting dated 19.12.2017:
3) KPCL informed that DPR for implementation of Two Bus operation for 220kV bus system has
been prepared and proposal is placed for funds from PSDF. After the approval of the DPR, the
work is proposed to be taken up. Time frame requested for is 2 yrs.
54/II/4 Tripping of 400 kV Raichur TPS-
Mahboobnagar line
05-04-2016 at 10:23
hrs
Line tripped on operation of Backup impedance
protection of line reactor. Direct trip was received at
Mahboobnagar end.
KPCL to keep the functioning of the concerned electro-
mechanical back-up impedance protection relay under
observation, and replace it with a spare at the earliest.
KPCL Status received vide KPCL mail dated 10.07.2017:
The electro-mechanical back-up impedance protection relay is in service. However, Budgetary
offer obtained for the retrofitting of Line reactor protection with Numerical relay and is under
process
Status received vide KPCL mail dated 14.12.2017:
Tendering under process
Review Meeting dated 19.12.2017:
KPCL informed that the new numerical relay for backup impedance protection of Line Reactor
would be provided by June, 2018.
KPCL Mail dated 19.01.2018:
E-tender for the retrofitting work of Line Reactor protections will be invited shortly.
Pending
46/II/21 Trippings at 220kV Raichur TPS Pending07-06-2015 at 01:35
hrs
KPCL1. KPCL to check the operation of anti-pumping relay on 220
kV side and keep it in healthy condition.
2. KPCL to provide manual reset to the 220 kV side master
trip relay.
3. KPCL to use both the 220 kV buses as main buses under
normal operation, and should go for single bus operation
only during emergencies.
Karnataka
Annexure-II
Page 18 of 47
Status received vide KPCL mail dated 10.07.2017:
1. (ii) Hot line water washing stopped and off line water washing is carried out whenever the
400 KV Unit or line is under tripped condition / Shutdown condition. --- Completed
1. (iii) Silicon coating for Unit#8 main & tie breakers carried out in Sep'16 and same is under
observation. Till today in order and good condition. For remaining breakers, since it is big order,
approval for the same is under process. --- Pending
2. Static / Electromechanical relays are existing in all 1 to 7 units. Breaker flash over protection
feature will be enabled (if available) in the numerical relays which will be retrofitted in phased
manner during R&M works.
Status received vide KPCL mail dated 14.12.2017:
1.(i) --- PendingReview Meeting dated 19.12.2017:
1 (iii) As upgradation of 400kV switchyard equip's to be taken under PSDF funds, Silicon rubber
coating for breakers is deffered till then. --- Pending
2. Replacement by Num relay for Units - 5,6 & 7 completed in the month of Oct-2017. Main-I is
Seimens make and Main-II is ABB make. --- Pending
KPCL mail dated 19.01.2018:
2. Replacement of Numerical relays for Units-5, 6 & 7 have been completed. Referred to OEM
for providing the Breaker flashover protection for all the breakers.
54/II/13 Tripping of Units at 220 kV
Raichur TPS
15-04-2016 at 15:36
hrs
During testing of retrofitted distance protection in
400kV Raichur-2 feeder, LBB protection trip DC got
extended to Bus trip. This resulted in tripping of 220kV
bus at RTPS and all connected 220 kV elements. Unit-4
which is connected to 400 kV Bus got tripped due to
tripping of Station Utility Transformer that is connected
220 kV bus
In view of the availability of two buses along with healthy bus-
coupler at 220 kV RTPS, KPCL is recommended to put in
service the double-bus operation at 220 kV RTPS by suitably
distributing loads within 15 days.
KPCL Status received vide KPCL mail dated 10.07.2017 & 14.12.2017:
Two Bus operation for 220kV bus is being carried out whenever required. However scheme for
tripping of one bus during LBB/fault and maintaining the other bus intact by tripping B/C
breaker will be taken up in R&M works.
Review Meeting dated 19.12.2017:
3) KPCL informed that DPR for implementation of Two Bus operation for 220kV bus system has
been prepared and proposal is placed for funds from PSDF. After the approval of the DPR, the
work is proposed to be taken up. Time frame requested is 2 yrs.
Pending
PendingKPCL 1.KPCL to undertake the following remedial measures to
avoid breaker flashovers:
(i) Replacing all porcelain insulators with composite insulators
(ii) Carrying out hot-line water washing of all insulators on
regular basis.
(iii) Applying Room Temperature Vulcanizing (RTV) Silicone
high voltage insulator coatings to all bus-connected ceramic
insulators of equipment like CT, PT, CB, Isolators etc.
2.KPCL to take steps to provide dedicated breaker flashover
protection to all breakers at Raichur TPS at the earliest.
Y-ph Pole of Tie-breaker of Unit-4 at RTPS failed. Unit-4
got tripped on operation of Generator Differential,
Reverse power & LBB protection. Operation of LBB
protection led to tripping of BUS-2 at RTPS
54/II/9 Tripping of 400kV Raichur TPS
Bus-2
13-04-2016 at 21:12
hrs
Annexure-II
Page 19 of 47
58/I/3
(GD)
Complete outage of 220 kV
Kadra power station of KPCL
06-09-2016
at 14:40 hrs
LBB of 220kV Kodasalli breaker at Kadra end got
operated which resulted in tripping of Bus at Kadra and
in turn led to tripping of all elements
1) KPCL to check settings of LBB protection in all relays from
which it was implemented, and ensure that their
configuration, logic, and timing are in order at their 220 kV
Kadra PH.
2) KPCL to furnish details regarding the existing LT auxiliary
supply arrangement at their 220 kV Kadra PH, and take steps
to provide a suitable Auto-Main-Fail (AMF) panel for DG set
to effect its auto-starting in case of failure of LT supply.
3) KPCL to ensure time-sync of all relays (DR’s & EL’s) with
GPS at their 220 kV Kadra PH.
4) KPCL to provide stand-alone Event Logger at their 220 kV
Nagjheri PH.
KPCL Status received vide KPCL mail dated 14.06.2017:
1. All logics checked and found normal. LBB timing checked and found 200msec as per KPTCL
MRT recommendation. - Completed
2. Work Under Progress ---- Pending
3. New GPS System commissioned along with new numerical and synchronised with GPS system -
Complied
4. Work Under Progress ---- Pending
Status received vide mail dated 14.12.2017:
1),3),4) Completed
2. Auto Start of DG set is taken up --- Pending
Review Meeting dated 19.12.2017:
2. KPCL informed that for AMF of DG, Scheme prepared & material procurement under process.
The AMF scheme will be implemented in January 2018. --- Pending
3. The GPS system commissioned on Nov 2016 & all the numarical relay time synchronised with
GPS ---- Completed
Status received vide mail dated 25.07.2018:
AMF panel procurement under progress.
Pending
62/I/1 Complete outage of 220 kV
Nagjheri substation of KPCL
21-01-2017
at 00:38 hrs
Triggering event was the fault on 220 kV Nagjheri
–Kodasalli line-2. Both buses of 220 kV Nagjeri power
station of KPCL got
de-energized.
1. KPCL to adopt the following VT fuse-fail logic for all 220 kV
lines emanating from NPH:
“Under VT fuse fail condition, distance protection shall
normally be kept blocked. However, upon detection of a fault
(sensed by negative sequence component), blocking of
distance protection shall give rise to operation of its inherent
Over-Current protection set with a definite time delay of 500
msec”.
2. KPTCL/ KPCL to revise Zone-2, Zone-3 and Zone-4 (reverse)
timings of DPR of all 220 kV lines emanating from Nagjheri PH
in line with Ramakrishna Committee guidelines.
KPCL Status received vide mail dated 14.06.2017:
1. Already settings are discussed with EE(RT), Hubli and soon relays will be tested for VT fuse fail
condition.
2. Timings of Zones were set as per the recommendations of CE(RT) & R&D, KPTCL, Bangalore &
EE(RT), KPTCL, Hubli.Regarding revision of timings will be carried out in co- ordination with
EE(RT), KPTCL, Hubli.
Status received vide mail dated 14.12.2017:
1. As per the recommendations of SRPC and SRLDC, in the event of VT fuse fail, non directional
over current and earth fault feature is enabled in the distance relay with a definite time lag of
600msec on pick up and the same is tested by KPTCL Hubli(RT) and KPCL jointly on 18.05.2017.
--- Completed
2. --- Pending
Review Meeting dated 19.12.2017:
2. KPCL informed that Zone settings of distance relays of all 220 kV lines emanating from
Magjheri SS had been revised in line with Ramakrishna Committee guidelines.. --- Completed.
Pending
69/II/8 Tripping of 220 kV Kaiga- Kadra
line-1
06-10-2017 at 22:22
hrs
While de-synchronising of Unit-2, B-phase pole of GCB
did not open and pole descrepancy relay operated.
Hence all 220KV lines CB hand tripped.
KPCL to take steps to replace the existing static protection
relays for Generator Units and Generating Transformers
(GT’s) with suitable Numerical relays at their 220 kV Kadra
PH.
KPCL Status received vide mail dated 25.07.2018:
Numerical Generator protection relay replacement proposed to be taken up alongwith SCADA
work.
Pending
72/I/4 Complete outage of 220kV
Sedam, Shahapur, Shahabad,
Kapanoor, Humnabad and
Halabarga Stations of KPTCL
01-02-2018
at 17:46 hrs
High resistance fault occurred in 110kV Sedam-Chittapur
line near Sedam end. Line DEF operated and backup OC
protection of 100MVA transformer operated at Sedam
end. But line breaker and transformer HV breaker didn’t
open due to problem in trip circuit. This resulted in
cascade tripping of upstream feeders and power supply
was lost to six 220kV stations of KPTCL.
KPCL to disable GFC protection on all lines emanating from
their generating stations.
KPCL Yet to be informed Pending
73/I/5 Complete outage of 220kV
Varahi power station
15-03-2018 at 22:36
hrs
There was Y-phase to ground fault on 220 kV Varahi -
Shimoga line-2. Consequent to persisting fault in ‘Y’
phase, the breaker failure protection operated resulting
in operation of 220KV bus bar protection at Varahi,
tripping all the connected lines and Varahi running units.
KPCL to take steps to put double-bus operation into service at
their 220 kV Varahi PH.
KPCL Status received vide mail dated 25.07.2018:
Under Implementation.
Pending
Annexure-II
Page 20 of 47
73/II/6 Multiple trippings at 220 kV
Sharavathy Power station.
15-03-2018
at 22:05 hrs
The incident happened during shifting of Unit-8 from
220 kV North West bus to 220 kV South West Bus. The
220 kV buses got tied together without synchronizing
which resulted in operation of bus bar protection.
KPCL to take steps to using full-fledged Double Main-Bus
system with four sections instead of the present Single Main-
Bus with two sections at their 220 kV Sharavathy GS.
KPCL Yet to be informed Pending
75/II/9 Tripping of 400 kV BTPS - JSWEL
line-1
11-05-2018
at 18:32 hrs
Over voltage stg-1 operated at BTPS and DT received at
JSWEL. Voltage difference was observed between R, Y
&B phases
KPCL to configure DR’s & EL’s of various protection relays at
their BTPS plant to record all mandated protections.
KPCL Yet to be Informed Pending
77/I/3 Complete outage of 220 kV
Sharavathy Generating Station
of KPCL and 220 kV Shimoga
Substation of KPTCL
25-07-2018
at 15:03 hrs
Triggering incident was bus fault at 220 kV Shimoga
substation due to snapping of R-phase jumper. Busbar
protection at 220 kV Shimoga substation did not operate
resulting in operation of distance protection Zone-2 at
remote ends. This led to complete outage of 220 kV
Shimoga substation. All running Units at 220 kV
Sharavathy GS also tripped due to tripping of evacuating
lines connected to Shimoga. This led to complete outage
at 220 kV Sharavathy GS.
W.r.t. Generator Unit protections at their 220 kV Sharavathy
GS, KPCL, in consultation with their OEM, would review the
time setting employed for Under Voltage (Stage-II) Protection
for providing a suitable time delay of 100 - 500 msec.
KPCL Yet to be informed Pending
Mail received on 28-04-2015:
1. In view of operating 220kV Ambewadi SS in split bus mode, action is being taken up by KPTCL.
Problem in the 220kV bus coupler breaker is attended and isolator overhauling work is under
progress. Spilt bus operation at Ambewadi will be made possible at the earliest. --- Pending
2. ICT Protection system at Ambewadi and trippings occured at Supa GS during the instance is
checked up and remedial measures already furnished in this regard.
---- Completed
Mail recieved on 29-07-2015:
1. Action is being taken by KPTCL for operating Ambewadi in split bus mode. Problem in bus
coupler breaker is attended.Isolator overhaulling work is completed.PTs are already provided to
220kV Bus-II. After commissioning of Bus-II PTs, Ambewadi can be operated in split bus mode.
Pending works will be completed within a months time.KPTCL Mail dated 16.12.2017 & Review Meeting dated 19.12.2017:
1. Recommended works at Ambewadi have not been taken up due to various problems faced
due to poor response from the turn key agency M/s ERL. A site meeting is planned during this
month to discuss about further plan of action for attending SRPC recommendations pertaining
to the Sub station.
The issue was discussed in the review meeting. Considering the importance of the substation
and delay in executing the works, it was decided to escalate all pending issues relating to
Ambewadi SS to KPTCL top Management for early completion.
40/I/1 1. Till the completion of R&M works for bus bar and LBB
protection, KPTCL shall explore the possibility of having split
bus operation at Ambewadi and submit the details of the
same to PCSC forum.
2. KPTCL shall provide the details of the tripping of Supa
hydro station connected downstream from 110 kV bus.
PendingKPTCLGD-1 at 220kV Ambewadi
Station of KPTCL
Triggering incident was B-phase to earth fault in 220kV
Ambewadi- Nagzari line-1. B-pole of breaker did not
open at Ambewadi end. LBB protection not available at
Ambewadi end. All elements tripped on Zone-2 from
remote ends.
22-12-2014
at 21:22 hrs
Annexure-II
Page 21 of 47
Mail received on 28-04-2015:
Procurement of Bus bar and LBB protection is in the final tendering stage. 2. Action is being
taken to restore the carrier protection for 220kV Sedam-Tandoor line. AR will be enabled.
Mail received on 29-07-2015:
1. Procurement of Bus bar and LBB protection is in the final tendering stage.
2. Action is being taken to restore the carrier protection for 220kV Sedam-Tandoor line. AR will
be enabled after restoration of PLCC.
KPTCL mail received on 23-01-2016:
1. Bus bar protection panels pocured and erected at Sedam. Wiring , testing ,commissioning is
being taken up.Planned to complete by April 2016.
2. Action is being taken to restore the carrier protection for 220kV Sedam-Tandoor line. AR will KPTCL Mail dated 16.12.2017:
1 & 2) Replacement of Bus Bar Protection is included under R&U project. Awarded to M/s GE
Ltd. Panels have alredy been supplied by the Agency. The work will be taken up on top priority.
Review Meeting dated 19.12.2017:
KPTCL informed that the works relating to put A/R in service are going on at their Sedam SS, and
assured that it would be put into service by February, 2018.
R-Phase to ground fault occurred on 220kV Sedam-
Shahpur line. Fault not cleared from Sedam end due to
stuck-breaker condition. While the Sedam- Sahapur line
tripped from Shahapur end in Zone-1, the other 220 kv
lines from Sedam tripped at remote ends in Zone-2. This
caused complete outage of 220kV Sedam substation.
20-12-2014
at 22:20 hrs
Pending41/I/4 Complete outage at 220kV
Sedam Substation of KPTCL (GD-
1)
KPTCL 1. KPTCL to provide Bus bar and LBB protections for 220 kV
bus at Sedam S/s.
2. KPTCL to implement A/R feature on 220 kV Sedam-
Tandur inter-state line.
Line tripped on Yphase to earth fault from both the ends Pending220kV Sedam-
Tandur line
27-01-2015 at 8.00
hrs
Mail recieved on 29-07-2015:
Carrier protection is being restored for 220kV Sedam-Tandoor line at Sedam end. After
restoring the carrier protection , AR will be enabled.
KPTCL mail recieved on 23-01-2016:
Carrier protection is being restored for 220kV Sedam-Tandoor line at Sedam end. After
restoring the carrier protection , AR will be enabled.
KPTCL mail recieved on 25-05-2016:
SEE,SCADA to update the latest status
KPTCL mail recieved on 28-06-2016:
Action is being taken to restore carrier protection.AR will be enabled once carrier signal is
restored.
KPTCL Mail Recieved dated 22-11-2017:
The Wave traps required are supplied under R&U project and the same is to be commisioned at
Sedam end for restoration of PLCC. Also,M-II distance relays have already been supplied by GE
Ltd.
KPTCL Mail dated 16.12.2017:
Carrier protection is to be restored. B/U OC and EF relay is to be replaced by M-II distance
relay. Required materials like wave trap, M-II distance relay are already supplied. The work will
be taken up on top priority through GE Ltd.
Review Meeting dated 19.12.2017:
KPTCL informed that the works relating to put A/R in service are going on at their Sedam SS, and
assured that it would be put into service by February, 2018.
KPTCLKPTCL was requested to explore the possibility of providing
A/R feature to this line and submit the remedial measures to
the PCSC forum.
40/IV/1
Annexure-II
Page 22 of 47
42/I/1 Complete outage of 220kV
Sedam substation of KPTCL
15-02-2015
at 14:24 hrs
Fault occurred in 220kV Sedam-Shahpur line 1. KPTCL to provide Bus Bar protection and LBB protection at
Sedam S/s and furnish the status of their implementation to
PCSC forum.
2. KPTCL to implement A/R feature on 220 kV Sedam-Tandur
inter-state line.
KPTCL Mail received on 27-05-2015:
1. Bus Bar protection will be provded under R&U.
2. A/R yet to be enabled.
Mail received on 29-07-2015:
1. Procurement of Bus bar and LBB protection is in the final tendering stage.
2. Action is being taken to restore the carrier protection for 220kV Sedam-Tandoor line. AR will
be enabled after restoration of PLCC.
KPTCL Mail Recieved dated 22-11-2017:
Bus Bar Protection panel and required Wave traps are supplied under R&U. Wave trap to be
commisioned in Tandoor line and PLCC to be restored.Once PLCC is restored AR will be enabled.
KPTCL Mail dated 16.12.2017:
1. Replacement of Bus Bar Protection is included under R&U project. Awarded to M/s GE Ltd.
Panels have alredy been supplied by the Agency. The work will be taken up on top priority.
2. AR feature will be enabled during retrofitting of Main-2 relays.
Review Meeting dated 19.12.2017:
1 & 2) KPTCL informed that the works are under progress and are targeted to be completed by
February, 2018.
Pending
42/I/2
(GD)
Complete outage of 220 kV
Ambewadi substation of KPTCL
12-03-2015 at 7:51
hrs
Fault in 220kV Ambewadi-Nagjheri line-2 1. KPTCL shall provide A/R feature on Ambewadi – Ponda 220
kV D/C inter-state line.
2. Till the completion of R&M works for bus bar and LBB
protection, KPTCL shall explore the possibility of having split
bus operation at Ambewadi and submit the details of the
same to PCSC forum.
KPTCL Mail received on 29-07-2015:
1. Procurement of Bus bar and LBB protection is in the final tendering stage.
2. Action is being taken to restore the carrier protection for 220kV Sedam-Tandoor line. AR will
be enabled after restoration of PLCC.
KPTCL Mail Recieved dated 22-11-2017 & 16.12.2017:
1.Enabling the AR feature was discussed during PCSC meetings and since Ambewadi-Ponda and
Ambewadi-Xeldom lines are radial lines, it was decided that enabling AR is not required. To clear
the faults in the abovelines early, the timings of the Zone 2 was reduced to 150mS and the Back
Up EFR timings have been reducedto 150mS. --- Completed
2.The planned works as per R&M could not be taken up due to the problem with the vendor
and could not be taken up under R&U project due to administrative reasons. ---- Pending
Review Meeting dated 19.12.2017:
2. The issue was discussed. Considering the importance of the substation and delay in
executing the works, it was decided to escalate all pending issues relating to Ambewadi SS to
KPTCL top Management for early completion.
Pending
48/I/2 Complete outage of 220kV
Peenya Substation in Karnataka
27-09-2015
at 4:23:17 hrs
All connected 220kV lines and transformers were taken
on 220kV North bus as South bus was under shut down
for conversion of strung bus to rigid bus and isolator
replacement under R&M works. Failure of HV side Y
phase CT of 150MVA Transformer-3 occurred at Peenya
Substation which resulted in operation of Differential
and HV REF protection. The failure of CT also resulted in
a 220kV bus fault in North Bus.
KPTCL to revise distance relay settings at Nelamangala end
for 220 kV Nelamangala – Hebbal - Peenya line – 1 for the
effective line length of 17 km. These new settings can be
appropriately reviewed as and when the tie-arrangement at
Hebbal is done away with.
KPTCL KPTCL mail received on 25-05-2016:
Presentl 220kV Nelamangala -Hoody (i.e. nelamangala-Peenya-Hebbal -Hoody line is made
LIILO at Yelahanka sub station and breaker at Peenya is kept open, necessary modification in
distance relay settings adopted for new configuration.
KPTCL Mail Recieved dated 22-11-2017:
Since usage of this line as an Incoming line at Peenya is required for emrgency purposes, the
settings of this line at Nelamangala end will be reduced to 17KMs and as a special case, to cover
the rest of the length of the line, Zone 2 timing will be reduced to 150 ms.
KPTCL Mail dated 16.12.2017:
The revised settings to be adpopted for this line considering reduced protected line length(
17KMs) is issued as a special case which will be implemened and tested during scheduled
outage.
Review Meeting dated 19.12.2017:
KPTCL informed that the revised setting would be implemented by December, 2017.
KPTCL Mail dated 26.06.2018:
Attended . Revised settings adopted at Nelamangala and connectted sub stations.
Pending
Annexure-II
Page 23 of 47
48/I/3 Outage of 220kV Ambewadi
station in Karnataka
30-09-2015 at 10:41
hrs
220kV Ambewadi-Nagjheri line-2 tripped on B-phase to
earth fault. This resulted in loss of supply to 220kV
Ambewadi bus. 220kV Ambewadi-Ponda line-1&2 were
hand tripped after deenergization of bus at Ambewadi.
KPTCL to fast-track providing A/R on all 220 kV lines
emanating from Ambewadi SS to prevent Station shut-down
on temporary faults.
KPTCL KPTCL mail received on 23-01-2016:
Will be complied in a months time.
KPTCL Mail Recieved dated 22-11-2017:
Enabling the AR feature was discussed during PCSC meetings and since Ambewadi-Ponda and
Ambewadi-Xeldom lines are radial lines, it was decided that enabling AR is not required. To clear
the faults in the abovelines early, the timings of the Zone 2 was reduced to 150mS and the Back
Up EFR timings have been reducedto 150mS.
KPTCL Mail dated 16.12.2017:
Enabling the AR feature was discussed during PCSC meetings and since Ambewadi-Ponda and
Ambewadi-Xeldom lines are radial lines, it was decided that enabling AR is not required. To clear
the faults in the abovelines early, the timings of the Zone 2 was reduced to 150mS and the Back
Up EFR timings have been reduced to 150mS. In view of the above, it is requested to drop the
issue from this list.
Review Meeting dated 19.12.2017:
KPTCL informed that AR would be enabled at Ambewadi end for lines other than Ponda and
Xeldom lines during retrofitting of Back Up protection by Distance protection relay at
Ambewadi.
Considering the importance of the substation and delay in executing various works, it was
decided to escalate all pending issues relating to Ambewadi SS to KPTCL top Management for
early completion.
Pending
KPTCL Mail received dated 25-05-2016:
SEE, RTC, Bangalore to update the status
KPTCL Mail received dated 28-06-2016:
Providing numerical bus bar protection to 400kV buses and GPS time synchronising equipment
at Guttur is considered under R&U. Work is awarded to M/s Alstom, execution will be taken up
shortly.
KPTCL Mail received dated 25-04-2017:
GPS and accessories will be supplied during May 2017, expected to complete the work within a
month after supply of materials.
KPTCL Mail dated 16.12.2017:
1). The work of replacing static type 400kV Bus Bar Protection scheme by numerical BBP is
under progress at Guttur.
--- Pending
2). GPS time syncronising device is expected to be supplied before end of December 2017 ---
Pending
Review Meeting dated 19.12.2017:
1) & 2) KPTCL informed that the works are under progress, and are targeted to br completed by
February, 2018.
KPTCL Mail dated 26.06.2018:
GPS time synchronisaionis provided for protection relays under R&U project. Replacement of
400kV BBP by numerical BBP is envisaged under R&U works. Additional quantity of controls
cables required to take up the BBP replacement work. Supply of control cables awaited.
KPTCL PendingMultiple tripping at 400kV
Guttur SS
1. KPTCL to configure all DR’s and EL’s at 400 kV Guttur SS so
that they will also get triggered for BBP operation.
2. KPTCL to ensure time-synchronization of all DR’s and EL’s
with GPS at their 400 kV Guttur SS.
51/II/21 Failure of Lightning Arrestor of Y-phase Line Reactor of
400kV Guttur-Hiriyur line-1 and line tripped on distance
protection Zone-1. Bus-bar protection of 400kV Bus-2 at
Guttur substation also got operated during the event
sensing this through fault. 400/220 kV ICT-1 & 2 at
Guttur, 400kV Kaiga-Guttur-2, 400kV
Guttur-Narendra-2, 400kV Guttur-Hiriyur-2 and 400kV
Guttur-Munirabad which are on 400kV Bus-2 got tripped
during the incident. 400kV Guttur-Narendra-1 which was
on Bus-1 also tripped at the same time.
17-01-2016 at 18:53
hrs
Annexure-II
Page 24 of 47
52/I/3 Complete outage of 220 kV
Shimoga substation
22-02-2016 at 15:03
hrs
220kV Bus Bar protection operated during failure of R
phase CT in DVG-2 line bay.
KPTCL to operate 220 kV Shimoga on multi-bus operation
under normal conditions, and put it on single-bus operation
only under emergency conditions.
KPTCL KPTCL Mail received dated 25-04-2017:
Replacement of existing BBP by new BBP with 4 zone protection is being taken up under R&U.
KPTCL Mail Recieved dated 22-11-2017:
GE Ltd has already supplied the necessary Bus Bar protection panels for replacement of the
existing static type BBP by new numerical BBP with 4 zone protection under R&U project. The
work of commissioning the same will be taken up shortly.
KPTCL Mail dated 16.12.2017:
Due to operational constraints two/ multi bus operation is not being implemented.
Review Meeting dated 19.12.2017:
It was noted that Shimoga SS is having required configuration for providing double-bus
operation. However, due to large no. of feeders (15 in no) with variable gneration at certain
remote ends like Varahi, the flows on these lines are bound to vary. As such it is necessary to
zero in on appropriate arrangement of feeders on different buses so that bus-isolators of the
feeders are not overloaded.
The issue was discussed. KPTCL was asked to try out multi-bus operation on trial basis to arrive
at suitable arrangement of feeders.
Pending
53/I/1 Complete outage of 220kV
Peenya Substation of KPTCL
16-03-2016 at 11:39
Hrs
220kV Peenya-Nelamangala-3 tripped on B-E fault at
both ends. At the same time, 220kV Peenya-
Nelamangala-4 tripped on R-Y fault only at Nelamangala
end, and was in service from Peenya end. Due to
tripping of these two lines, 220kV Peenya-Nelamangala-
2 tripped on overcurrent protection.
KPTCL to furnish a report on the tripping of 220 kV Peenya-
Nelamangala line-4 Nelamangala detailing the remedial
measures taken including the settings adopted for Z1B (Zone
extension) and Power Swing Block.
KPTCL KPTCL Mail received dated 25-05-2016:
SEE, RTC, Bangalore to update the status
KPTCL Mail Recieved dated 22-11-2017:
Since usage of this line as an Incoming line at Peenya is required for emrgency purposes, the
settings of this line at Nelamangala end will be reduced to 17KMs and as a special case, to cover
the rest of the length of the line, Zone 2 timing will be reduced to 150 ms.
KPTCL Mail dated 16.12.2017:
Considering it as special case, revised settings to be adpopted for this line considering reduced
protected line length( 17KMs) is issued which will be implemened and tested during next
scheduled outage.
Review Meeting dated 19.12.2017:
KPTCL informed that the revised settings would be implemented by December, 2017.
Pending
57/II/1 Tripping of 220 kV Chikkodi-
Mudshingi and 220 kV Chikkodi-
Talandage lines
01-07-2016 at 03:03
hrs
Triggering incident was failure of B-ph PT of 220kV Bus-2
(western bus) at 220KV Chikkodi substation. 220KV
Chikodi- Belgaum-I line tripped on DEFR (Inst), 220KV
Chikkodi-Kudachi line tripped on Distance protection
and also 100MVA transformer-2 tripped on E/F
protection.
1.KPTCL to take steps to provide busbar protection at their
220 kV Chikkodi inter-regional substation, and furnish a time-
line for the same.
2.KPTCL to review distance protection settings for 220 kV
Chikkodi – Kudachi line.
3.KPTCL to furnish equipment failure report of the current
incident to PSE&TD Division of CEA with a copy marked to
SRPC.
KPTCL KPTCL Mail Recieved dated 22-11-2017:
1. The necessary Bus Bar protection panels are already supplied to Chikkodi under R&U project.
Presently R&U works at sub stations subjected to audit are taken up. After completion of PAR
works, the baove works are planned.
--- Pending
2. --- Pending
3. --- Pending
KPTCL mail dated 16.12.2017:
1.The necessary Bus Bar protection panels are already supplied to Chikkodi under R&U project.
Control cables have to be supplied. Presently R&U works at sub stations subjected to audit are
taken up. After completion of PAR works at 26 Sub stations, remaining works will be taken up
through M/s GE.
--- Pending.
2. --- Pending
3. --- Pending
Review Meeting dated 19.12.2017:
1. KPTCL informed that BBP would be provided by April, 2018.
---- Pending
2. KPTCL informed that DPR settings had been reviewed.
---- Completed
3. EFR on failure of B-ph PT of 220 kV Bus-2 had been furnished to CEA. ---- Completed
Pending
Annexure-II
Page 25 of 47
62/II/3 Tripping of 220 kV Bus 2 and
connected elements (220kV HAL
#1 and 2, 400/220 kV ICT- 1, 2
and 220/66 kV ICT-2) at 400/220
kV Hoody substation of KPTCL
(Load loss : 590 MW)
09-01-2017
at 23:06 hrs
Failure of R-phase CT of 220/ 66 kV transformer-2 at
220kV Hoody end resulted in a bus fault in 220kV Bus-2.
Fault was cleared by backup protection of ICT's (220kV
lines were being radially operated) due to absence of
busbar protection
1. KPTCL to provide Busbar protection at their 220 kV Hoody
SS at the earliest.
2. KPTCL to furnish an Equipment Failure Report on CT failure
to CEA with a copy marked to SRPC.
KPTCL KPTCL mail received dated 25.04.2017:
Numerical BBP is being provided under R&M works.
KPTCL Mail Recieved dated 22-11-2017:
1. Numerical Bus Bar protection panels have already been supplied as a part of R&M works
awarded to GE Ltd. Due to issue regarding the sectionaliser CTs, the work had stopped. Now the
same is resolved and the the above work will be taken up after supply of sectionaliser CTs. ---
Pending
2. --- Pending
KPTCL Mail dated 16.12.2017:
1. Numerical Bus Bar protection panels have already been supplied as a part of R&M works
awarded to GE Ltd. Due to issue regarding the sectionaliser CTs, the work had stopped. Now the
same is resolved and the the above work will be taken up after supply of sectionaliser CTs. ---
Pending
2. --- Pending
Review Meeting dated 19.12.2017:
1. KPTCL informed that BBP at 220 kV Hoody would be provided by March, 2018.
---- Pending
2. EFR on failure of R-ph CT of 220/ 66 kV Transformer-2 had been furnished to CEA. ----
Completed
Pending
62/II/5 Tripping of 220 kV South Bus and
connected elements (220kV HSR,
220kV Nagnathpura, 220 kV
Harohalli, 220 kV
Subramanyapura, 220 kV
Tataguni, 220 kV Mallur and
400/220kV ICT-2 and 3) at
400/220kV Somanhalli
substation of KPTCL
(Load loss: 850 MW)
20-01-2017 at 14:34
hrs
Triggering incident was fault in 66 kV Somanahalli -
Bannerghatta line and fault was cleared by operation of
Back-up OCR at Somanahalli end.
KPTCL to provide numerical Busbar Protection at their 220 kV
Somanahalli SS at the earliest.
KPTCL KPTCL mail received dated 25.04.2017:
Numerical BBP is being provided under R&M works
KPTCL Mail Recieved dated 22-11-2017:
Tesing & Commissioning of numerical BBP at Somanahalli is under progress. There was some
technical issue wth BBP scheme supplied to Somanahally which is being finalised in
consultation with OEM SIFANG. Numerical BBP will be commissioned at Somanahally within a
month's time.
KPTCL Mail dated 16.12.2017:
Numerical Bus Bar protection Scheme will be commissioned at Somanahally before end of
December 2017
Pending
69/III/5 Tripping of 220 kV Sedam-
Tandur line
10-10-2017 at 00:50
hrs &
10-10-2017 at 17:27
hrs
Tripped on Y-Phase to ground fault due to distance
protection operation. Auto reclosure could not be
validated from the submitted DR/EL.
KPTCL to enable and put A/R into service from Sedam end on
220 kV Sedam – Tandur S/C line.
KPTCL Review Meeting dated 19.12.2017:
KPTCL informed that the works relating to put A/R in service are going on at their Sedam SS, and
assured that it would be put into service by February, 2018.
Pending
72/I/3 Complete outage of 220kV TK
Halli, Kadakola,
Chamarajanagara and
Maduvinahally substation of
KPTCL
27-01-2018
at 12:41 hrs
Snapping of B-phase Jumper in 220 kV Bastipura -
Kadakola line-1 resulted in tripping of the line. 220kV
Bastipura-Kadakola line-2 also got tripped during fault in
line-1. Due to tripping of above lines bus shutdown
occurred at TK Halli, Madhuvanahally, Chamarajanagara
and Kadakola stations due to overloading of connected
lines.
1. KPTCL to provide the detailed logics of SPS proposed in
Hotagally – Bastipura – Kadakola area, and take steps to
implement the same at the earliest.
2. KPTCL to take steps to put A/R into service on 220 kV
Bastipura – Kadakola lines at the earliest.
KPTCL KPTCL Mail dated 26.06.2018:
1. ---Pending.
2. Auto Reclosure enabled for 220kV Bastipura Lines at Kadakola end. Power Grid has been
requested to enable AR for Kadakola lines at Bastipura Sub Station. ---Completed.
Pending
74/I/1 Complete outage of 220 kV
Sedam Substation
01-04-2018 at
19:56hrs
Triggering incident was fault in 220 kV Sedam-Tandur
line. 220 kV Sedam-Shahapur, 220 kV Sedam-RTPS lines -
1&2 and 220 kV Sedam-Tandoor line tripped from RTPS,
Shahpur and Tandoor. Tripping of incoming lines to
Sedam caused shut down at Sedam Sub Station resulting
in complete outage of the station.
KPTCL to adopt the following VT fuse-fail logic for all 220 kV
lines emanating from Sedam:
“Under VT fuse fail condition, distance protection shall
normally be kept blocked. However, upon detection of a fault
(sensed by negative sequence component), blocking of
distance protection shall give rise to operation of its inherent
Over-Current protection set with a definite time delay of say,
500 msec”.
KPTCL KPTCL Mail dated 26.06.2018:
Attended in all 220kV bays at Sedam.
Pending
Annexure-II
Page 26 of 47
74/I/2 Complete outage of 220 kV
Ambewadi station
02-04-2018 at
13:46hrs
Loss of supply occurred to 220 kV Ambewadi station due
to tripping of 220kV Nagzhari-Ambewadi line-2 (Source)
from Nagzhari power station. After bus dead, Ambewadi-
Ponda lines – 1 & 2 were hand-tripped. In antecedent
conditions, 220kV Ambewadi - Nagjheri ckt-1, 220kV
Ambewadi-Narendra Ckt-1 &2 were out of service.
1). KPTCL to review operation of SPS at NPH for proper
functionality and changed network conditions (reduction of
generation with tripping of evacuating lines) and put it into
service at the earliest.
2). KPTCL to furnish equipment failure report of the current
incident (R-phase CT in Nagjheri – 1 bay at Ambewadi SS) to
PSE&TD Division of CEA with a copy marked to SRPC.
KPTCL Yet to be informed Pending
74/II15 Multiple Trippings at 400/220kV
Guttur station
21-04-2018 at 12:50
hrs
Triggering incident was fault in 220 kV Davanagare -
Shimoga line. Bus bar protection operated at Guttur
resulting in tripping of all the connected elements. 220
kV Guttur was on single bus operation due to CVT
problem in Bus-2.
KPTCL to put double-bus operation at their 220 kV Guttur
substations by attending to Bus-2 CVT problem.
KPTCL Yet to be informed Pending
21-04-2018 at 12:55
hrs
21-04-2018 at 13:33
hrs
75/I/1 Complete outage of 220 kV
Kadra PH
21:54 hrs on
10-05-2018
Triggering incident was snapping of tower earth guard
conductor above 220kV bus. Bus bar protection
operated resulting in complete outage of 220 kV Kadra
Station. 220 kV Kadra Station was on single bus
operation.
KPTCL to provide double-bus operation at their Kadra PH
within one-year period.
KPTCL Yet to be informed. Pending
yet to be informed PendingTripping of 400 kV Nelamangala-
Bidadi line-1&2 and 400/220 kV
ICT-3 at Nelamangala
Mal-functioning of LBB relay provided on the 400 kV side
of ICT-3 resulted in Bus-B tripping at Nelamangala
KPTCL to furnish a detailed action taken report for the
subject trippings including remedial measures taken.
KPTCL74/II/16
Annexure-II
Page 27 of 47
49/I/3 Complete outage of 220kV
Ambewadi Substation of KPTCL
29.10.2015 at 14:34
hrs
220kV Nagjheri-Ambewadi line-1 tripped at 13:33 hrs
due to B phase to earth fault. Ambewadi was radially fed
from Nagjheri power station through 220kV Nagjheri-
Ambewadi line-2. Tripping of this line caused 220kV Bus
shut down at Ambewadi and remaining lines and
transformers were hand tripped
1. KPCL to provide A/R on all 220 kV lines emanating from
Nagjheri PH.
2. KPTCL to provide A/R on all 220 kV lines emanating from
Ambewadi SS.
KPCL/ KPTCL KPTCL Mail Recieved dated 22-11-2017:
1. coordination of KPCL has been requested for enabling AR lines terminated to Nagajari.
2. AR will be enabled at Ambewadi end for lines other than Ponda and Xeldom lines during
retrofitting of Back Up protection by Distance protection relay at Ambewadi.
KPTCL Mail dadted 16.12.2017 & Review Meeting dated 19.12.2017:
1. KPTCL informed that Coordination of KPCL has been requested for enabling AR lines
terminated to Nagajari.
--- Pending
2. KPTCL informed that AR would be enabled at Ambewadi end for lines other than Ponda and
Xeldom lines during retrofitting of Back Up protection by Distance protection relay at
Ambewadi. -- Pending
Pending
Status informed during Special Meeting held on 03.06.2016:
1. KPTCL informed that the matter had been taken up with concerned Line Operation and
Maintenance wing to carry out corridor clearance and maintenance as per schedule to avoid
frequent line faults in this corridor. A letter had also been addressed to Chief Engineer,
Bhagalkot zone, to ensure lines in & around Kali complex are maintained in healthy condition. ---
Completed
2. KPTCL assurd that the final modified SPS would be implemented at Nagjheri PH at the
earliest. ------ Pending
3. KPCL informed that Nagjhari- Kodasalli Lines 1 & 2 had been kept in service since 23.05.2016
@ 08.06hrs.
--- Completed
KPTCL Mail received dated 28-06-2016:KPTCL Mail dated 16.12.2017:
1) & 3). --- Completed.
2). Proposed revision in existing SPS scheme is already submitted to SRLDC/SRPC., yet to be
discussed and approved by the SRPC forum --- Pending
Review Meeting dated 19.12.2017:
2. The SPS proposed by KPTCL was discussed and the PCSC forum suggested certain changes for
suitable incorporation. KPTCL agreed to look into the same and assured that the modified SPS
would be furnished by January, 2018.
KPCL/ KPTCL Pending220kV lines from Nagjheri power house started tripping
from 11:00 hrs due to fault in lines. The sequence of
tripping is shown in SOE list. At 12:33 hrs, 220kV
Narendra-Ambewadi lines-1&2 got tripped which
resulted in loss of evacuation path to Nagjheri station
resulting in tripping of running Units and complete
outage at Nagjhheri power station. 220kV Ambewadi
station also got de-energized due to tripping of source
feeders i.e. 220kV Narendra-Ambewadi-1&2 and 220kV
Nagjheri-Ambewadi-1&2.
22-02-2016 at 12:36
hrs
Complete outage of 220 kV
Nagjheri power station and 220
kV Ambewadi substation of
KPTCL
1. To avoid tripping of transmission lines on transient faults,
KPCL/ KPTCL is recommended to carry out periodic patrolling
of lines, and ensure their proper maintenance by carrying out
jungle/ bushing clearance and trimming of tree branches
within the RoW of transmission lines as per the SRPC
transmission line patrolling guidelines (available under the
menu item "All Uploads/ Operation/ Miscellaneous/
Transmission Line Patrolling Protocol / Guidelines for
Southern Region" on SRPC website).
2. KPCL/ KPTCL to review operation of SPS at NPH for
functionality (reduction of generation with tripping of
evacuating lines) and healthiness.
3. KPCL to put 220 kV Kodasalli - Nagjheri D/C lines into
service if more than 200 MW generation from Kali Complex
(with Nagheri Contribution not less than 50 MW) is ensured
on sustained basis.
51/I/3
Annexure-II
Page 28 of 47
Pending
Complete outage of 220kV
Ambewadi station of KPTCL and
220kV Nagjheri of KPCL
TANGEDCO mail dated 15.04.2017:
1) New Relay is tested and ready for replacement.Now all 5 units are in service.The relay will be
replaced when lesser units are in service. --- Pending
2.a)Steps are taken to renovate & mordernization of all the control panel into Numerical based
control panels. --- Pending
2.b) Since 230 KV indoor switchyard has no spare space providing dual CT`s is not fessible. --
Completed
3) Procurement of EL & DR is under progress. --- Pending
TANGEDCO mail dated 26.04.2017:
1) Check zone New Relay is replaced on 17.04.2017 -- Completed.
2. --- Pending
3. --- Pending
TANGEDCO mail dated 13.12.2017:
2).P & C wing gives clearance to TTPS to procure the Bus bar protection relays and protection
relays and SER / DR system vide Lr.CE/P&C/SE/D/EEPC4/AEE3/F.TECH/D.27/17 Dated:
05.10.2017. To get administrative approval budgetary offer has bar protection relay from
various companies ----Pending
3). SRPC vide Lr: SRPC/SE- III/CEA/2017/6450/DT:27.10.2017 gives features of SER/DR.
Budgetary offer will be called for SER / DR having above features. ---Penidng
Review Meeting dated 19.12.2017:
2) & 3) The issue was discussed and TANGEDCO was asked to provide time-line for
implementing the recommendations.
Mail dated 29.01.2018:
Procurement work is under progress and will be completed by December 2018.
PendingKPCL/ KPTCL53/I/3
62/II/7
Tamil Nadu
25-01-2017 at 22:36
hrs
Tripping of running Units &
230kV feeders at Tuticorin TPS of
TANGEDCO
(Gen Loss: 640 MW)
KPTCL Mail received dated 28-06-2016:
Modifications to be carried in Nagzari SPS logic is submitted to SRLDC/SRPC for verification and
approval
Status received vide KPCL mail dated 14.06.2017:
1. Tripped since there was evacuation problem and there were only two lines NA-1 and NA-2 ----
Completed
2. Will be reviewed in consultation with EE(RT), KPTCL, Hubli. --- Pending
3. Both the lines are in charged condition. --- Completed.
KPTCL Mail Recieved dated 22-11-2017:
2. Proposed revision in existing SPS scheme is already submitted to SRLDC/SRPC., yet to be
discussed and approved by the SRPC forum. --- Pending
KPTCL Mail dated 16.12.2017:
18-03-2016 at 14:40
hrs
Ambewadi Narendra line-2 tripped on fault and 220kV
ambewadi Narendra line-1 tripped due to over-loading.
Running Units at Nagjheri also tripped during the event
due to tripping of evacuating lines
1. KPCL to furnish a report on the reasons for Unit-6 tripping
at Nagjheri PH.
2. KPCL/ KPTCL to modify suitably the SPS at Nagjheri Power
House such that it would also factor in the over loading of
Ambewadi-Narendra lines.
3. KPCL to put 220 kV Kodasalli - Nagjheri D/C lines into
service if more than 200 MW generation from Kali Complex
(with Nagheri Contribution not less than 50 MW) is ensured
on sustained basis.
Failure of Bus Section-I Y-ph CT resulted in operation of
bus-bar protection for Bus Sections -I & II. Running
Units#1, 4 and 5, 230 kV Kayathar, 230kV Kudankulam,
230kV Sterlite, Station Transformer-1, 2 & 3 got tripped
during the incident. Unit – 2 & 3 were not in service.
TANGEDCO1. TANGEDCO to replace existing Check-Zone relay with a new
one possessing required performance.
2. TANGEDCO to take steps to provide numerical busbar
protection at their 220 kV Tuticorin TPS. TANGEDCO may also
explore providing dual CT’s (on either side) for all B/S
breaakers at the time of commissioning of numerical BBP, if
there were no space constraints.
3. TANGEDCO to take steps to provide for standalone Event
Logger (EL) and standalone Disturbance Recorder (DR) with
automatic downloading facility to a centralized server.
Annexure-II
Page 29 of 47
TANTRANSCO MAIL DATED 22.05.2018 & 08.06.2018:
230kV Othakalmandapam - Myvadi feeder replacement of kundha conductor with Zebra and
tower replacement work has been sanctioned. Work will be taken up. Timeline: June-2018.
TANTRANSCO mail dated 29-08-2018 & 11.09.2018:
230kV Othakalmandapam - Myvadi feeder replacement of kundha conductor with Zebra and
tower replacement work has been sanctioned. Work will be taken up. Timeline: Dec-2018.
TANTRANSCO Mail received on 19-02-2016 and 24-03-2016:
Revision of Bus Bar Protection setting was carried out. The stabilizing voltage setting was raised
from 410 to 450 volts. After completing the necessary test, the bus bar protection put in to
service on 29.12.2015.
Mail Received on 27-04-2016 ,16-06-2016,25-07-2016 & 24-09-2016:
Revision of Bus Bar Protection setting was carried out. After completing the necessary test, the
bus bar protection put in to service on 29.12.2015.
Mail received on 10-11-2016 & 20.12.2016:
Provision of Bus Coupler bay arrangement was included in the Upgradation works proposed and
the same was sanctioned by MoP through PSDF.
Numerical relay allotted and being commissioned.
Mail received on 20-02-2017:
Numerical BBP relay was commissioned on 02.02.2017
Status received vide mail dated 12.04.2017 & 01.06.2017 & 15-06-2017:
Numerical BBP relay was commissioned on 02.02.2017.
Provision of Bus Coupler bay arrangement was included in the Upgradation works proposed and
the same was sanctioned by MoP through PSDF.
Status received vide mail dated 04.08.2017:
21-12-2015 at 6:28
hrs
TANTRANSCO TANTRANSCO Mail received on 19-02-2016, 24-03-2016 and 27-04-2016:
230kV Othakalmandapam - Myvadi feeder will be made LILO at Kongal Nagar. Line restringing
will be carried out along with the above proposal.
Mail Received on 20-05-2016 ,16-06-2016,25-07-2016 & 24-09-2016:
230kV Othakalmandapam - Myvadi feeder will be made LILO at Kongal Nagar. Line restringing
will be carried out along with the above proposal.
Status received vide mails received on 10-11-2016 & 20.12.2016 & 12.04.2017 & 01.06.2017 &
15-06-2017 & 04.08.2017:
230kV Othakalmandapam - Myvadi feeder will be made LILO at Kongal Nagar. Line restringing
will be carried out along with the above proposal.
TANTRANSCO mail dated 18-09-2017 & 31-10-2017:
Othakalmandapam - Myvadi feeder will be made LILO at Kongal Nagar. Line restringing will be
carried out along with the above proposal.
Status received vid email dated 12-12-2017:
Othakalmandapam - Myvadi feeder replacement of kundha conductor with Zebra and tower
replacement work has been sanctioned. Work will be taken up.
Review Meeting dated 19.12.2017:
TANTRANSCO informed that 230 kV OK Mandapam - Myvady feeer was LILOed at Anaikadavu
on 06.11.2017. Further replacement of the existing Kundah condductor with Zebra has also
been taken up, and is targeted to be completed by June, 2018.
TANTRANSCO mail dated 25-01-2018:
230kV Othakalmandapam - Myvadi feeder replacement of kundha conductor with Zebra and
tower replacement work has been sanctioned. Work will be taken up. Timeline: June-2018.
TANTRANSCO PendingTANTRANSCO to examine the feasibility of providing two
main-zone operation for bus bar protection by exploring
various alternatives like replacing existing bus-coupler CB
with a hybrid bus-coupler CB that comes with inbuilt CT,
replacing existing BBP relay with another suitable relay that
supports two main-zone operation, and implement the same.
Complete outage of 230kV Palladam, 230 kV
Othakalmandapam S/s, 230 kV Coimbatore S/s, 230 kV
Thudialur and 230 kV Sadayapalayam S/s
TANTRANSCO to take suitable measures like installing more
stub-towers along 230 kV OK Mandapam – Myvady line to
avoid excessive sag due to over-loading.
Disturbance in 220kV Tamilnadu
system
50/I/3
Pending
Complete outage of 230kV
Mywadi station of TANTRANSCO
48/I/1 05-09-2015 at 14:04
hrs
Busbar protection got operated for a fault in 230kV
Mywadi-Anaikadavu line
Annexure-II
Page 30 of 47
Status received vide mail dated 18-09-2017 & 31-20-2017:
Numerical BBP relay was commissioned on 02.02.2017. Provision of CT in Bus Coupler bay is
arranged and zone segregation will be provided.
Status received vid email dated 12-12-2017:
Numerical BBP relay was commissioned on 02.02.2017. Provision of CT in Bus Coupler bay has
been allotted. Zone segregation will be provided after commissioning of CT.
Review Meeting dated 19.12.2017:
TANTRANSCO informed that the recommendation would be complied with by March, 2018.
TANTRANSCO Mail received on 25-01-2018:
Provision of CT in Bus Coupler bay is arranged and zone segregation will be provided. Timeline:
March-2018.
TANTRANSCO MAIL DATED 22.05.2018 & 08.06.2018:
Bus coupler bay equipments allotted will be commissioned by Aug 2018
TANTRANSCO MAIL DATED 23.07.2018:
Commissioning of CT in Bus Coupler bay is under progress
TANTRANSCO MAIL DATED 29.08.2018 & 11.09.2018:
Commissioning of CT in Bus Coupler bay is under progress Will be completed by Oct.2018.
21-12-2015 at 6:28
hrs
TANTRANSCO PendingTANTRANSCO to examine the feasibility of providing two
main-zone operation for bus bar protection by exploring
various alternatives like replacing existing bus-coupler CB
with a hybrid bus-coupler CB that comes with inbuilt CT,
replacing existing BBP relay with another suitable relay that
supports two main-zone operation, and implement the same.
50/I/3 Complete outage of 230kV
Mywadi station of TANTRANSCO
Busbar protection got operated for a fault in 230kV
Mywadi-Anaikadavu line
Annexure-II
Page 31 of 47
TANTRANSCO mail received on 25-01-2018:
1) Commissioning of Bus Coupler CT, Extended Bus with Additional Bus Coupler is under
progress. Timeline: June-2018.
2) Numerical BBP commissioned on 29.08.2017 to enable Bus seggregation.
3) Providing Re-Trip feature for LBB will be studied.
TANTRANSCO MAIL DATED 22.05.2018 & 08.06.2018:
Providing new Bus coupler bay involes bay shifting work.work awarded and under progress.
Time line. Dec2018.
TANTRANSCO MAIL DATED 23.07.2018:
Providing new Bus coupler bay involes bay shifting work.work awarded and under progress.
Time line. Dec2018.
TANTRANSCO MAIL DATED 29.08.2018 & 11.09.2018:
Providing new Bus coupler bay involes bay shifting work.work awarded and under progress.
Time line. Dec2018.
Mail recieved on 25-07-2016 & 24-09-2016:
TANTRANSCO: Auto Transformer-2 HV side Bus isolator 'C'-phase support insulator of 230kV
Southern Bus was replaced and Bus Bar Protection scheme was restored on 12.05.2016.
Status received vide mails received on 10-11-2016 & 20.12.2016 & 12.04.2017 & 01.06.2017 &
15-06-2017 & 04.08.2017 & 18.09.2017:
CT is not available in the Bus Coupler bay for zone segregation. CT latch relay is to be provided
for all bays for zone segregation.
Status received vide mails received on 31-10-2017 & 12-12-2017:
Numerical Bus bar protection panel allotted and will be commissioned with zone segregation..
Review Meeting dated 19.12.2017:
TANTRANSCO informed that Numerical BBP would be commissioned by March, 2018.
TANTRANSCO mail received on 25-01-2018:
Commissioning of Numerical Bus bar protection is under progress. Zone segregation will be
ensured. Timeline: March-2018.
55/I/1
(GD)
Complete outage of 230 kV
Gummidipoondi Station of
TANTRANSCO
12-05-2016 at 12:15
hrs
Flashover of Auto Transformer- 2 HV
B-phase Isolator supporting insulator of 230kV Southern
Bus occurred at Gummidipoondi station. At the time of
fault, Bus bar protection relay was not in service for pre-
commissioning testing of Auto Transformer-2. All
feeders got tripped due to operation of zone-2
protection from remote ends.
TANTRANSCO to take steps to provide double-bus operation
at their 230 kV Gummidipoondi SS.
TANTRANSCO Pending
51/I/1
(GD)
PendingTANTRANSCO 1. TANTRANSCO to provide split-bus operation with bus
sectionalizer CB for their 230 kV Madurai (Chekanurani) SS.
2. TANTRANSCO to provide two main-zone operation for the
numerical BBP that is being commissioned.
3. TANTRANSCO to examine the feasibility of providing Re-
Trip feature for the LBB protection, and accordingly take
steps for implementing the same.
Fault had occurred in 230kV Madurai-Sembatty line. Trip
from distance relay was not extended to breaker due to
protection DC fail. LBB protection got operated resulting
in a busbar trip at 230kV Madurai substation. All
elements got tripped as there is a single bus operation at
230kV Madurai S/s
19-01-2016
at 11:56 hrs
Complete outage of 230kV
Madurai S/s (Chekanaurani) of
TANTRANSCO
TANTRANSCO mail received on 24-03-2016:
CMR relay for extending LBB protection was released and LBB extended from Distance
Protection relay directly. CT is not available in the Bus Coupler bay for zone segregation.
However, during commissioning of third ICT, Bus section Breaker will be provided for zone
segregation. Numerical BBP relay will be provided.
Status received vide mails recieved on 27-04-2016 and 20-05-2016 ,16-06-2016, 25-07-2016,
24-09-2016,10-11-2016 & 20.12.2016 & 12.04.2017 & 01.06.2017 & 15-06-2017:
1 & 2) CT is not available in the Bus Coupler bay for zone segregation. However, during
commissioning of third ICT, Bus section Breaker will be provided for zone segregation.
Numerical BBP relay will be provided.
Status received vide mail dated 04.08.2017:
1 & 2) Contract awarded for providing third ICT & Bus modification works to accomodate bus
coupler bay. Numerical BBP relay has been provided and tesing under progress.
Status received vide mail dated 18.09.2017:
1 & 2) Contract awarded for providing third ICT & Bus modification works to accomodate bus
coupler bay. Numerical BBP relay has been provided and tesing under progress.
Status received vide mail dated 01.11.2017:
1 & 2) Contract awarded for providing third ICT & Bus modification works to accomodate bus
coupler bay.
Annexure-II
Page 32 of 47
TANTRANSCO MAIL DATED 22.05.2018 & 08.06.2018:
Numerical Busbar protection relay commissioned on 14.05.2018
TANTRANSCO MAIL DATED 23.07.2018:
Control & Status of isolator feedeback to be provided by replacement of Drive Mechanism box.
TANTRANSCO MAIL DATED 29.08.2018:
Control & Status of isolator feedeback to be provided by replacement of Drive Mechanism box.
TANTRANSCO MAIL DATED 11.09.2018:
Control & Status of isolator feedeback to be provided by replacement of Drive Mechanism box.
Timeline requested upto Dec 2018.
55/I/1
(GD)
Complete outage of 230 kV
Gummidipoondi Station of
TANTRANSCO
12-05-2016 at 12:15
hrs
Flashover of Auto Transformer- 2 HV
B-phase Isolator supporting insulator of 230kV Southern
Bus occurred at Gummidipoondi station. At the time of
fault, Bus bar protection relay was not in service for pre-
commissioning testing of Auto Transformer-2. All
feeders got tripped due to operation of zone-2
protection from remote ends.
TANTRANSCO to take steps to provide double-bus operation
at their 230 kV Gummidipoondi SS.
TANTRANSCO Pending
Annexure-II
Page 33 of 47
The issue was discussed in PCSC-58 meeting held on 18.10.2016, when PCSC forum agreed to de-
link the implementation of the Item from the scope of Protection Audit Recommendations
(PAR), and pursue it as part of PCSC Recommendations.
Status received vide mails dated 10.01.2017 & 12.04.2017 & 01.06.2017 &15-06-2017 &
04.08.2017 & 18.09.2017 & 31-10-2017& 12-12-2017:
Different make Relays will be provided for Main-I & II relays at Sunguvarchatram end in a
phased manner.
Review Meeting dated 19.12.2017:
TANTRANSCO informed that the recommended works of providing different make Relays for
Main-I & Main-II are targeted to be completed by September, 2018.
TANTRANSCO mail received on 25-01-2018:
Different make Relays will be provided for Main-I & II relays at Sunguvarchatram end in a
phased manner. Timeline: September-2018.
TANTRANSCO MAIL DATED 22.05.2018:
TANTRANSCO informed that the recommended works of providing different make Relays for
Main-I & Main-II are targeted to be completed by September, 2018.
TANTRANSCO MAIL DATED 08.06.2018:
provision of Different make Relays for Main-I & Main-II will be completed by September, 2018.
TANTRANSCO MAIL DATED 23.07.2018:
Different make Relays will be provided for Main-I & II relays at Sunguvarchatram end in a
phased manner. Timeline: September-2018.
TANTRANSCO MAIL DATED 29.08.2018 & 11.09.2018:
Different make Relays will be provided for Main-I & II relays at Sunguvarchatram end in a
phased manner. Timeline: September-2019.
14-09-2016 at
11:13Hrs
Bus Bar Protection (Zone-2) of 230 kV Bus-B got
operated at Alamathy Station during fault in 230 kV
Alamathy-Korattur feeder.
Pending
Pending
58 Different type and Make of distance protection relays to be provided for Main-I & Main-II protection for 230kV feeders at 400 kV Sunguvarchathiram & 230 kV
Sunguvarchathiram Substation [Carry-Over from Protection Audit Recommendations]
TANTRANSCO
58/II/17 Multiple tripping at 230 kV
Alamathy Station
1. TANTRANSCO to check the healthiness of BBP relay by
conducting stability test, and take appropriate remedial
action like increasing voltage settings, ensuring the
healthiness of CT’s, using CT’s with similar characteristics
(equal saturation effects & equal winding resistances) etc. at
their 230 kV Alamathy SS.
2. TANTRANSCO to replace the existing high-impedance BBP
relay with its low-impedance/ numerical variant so as to
accommodate variation in CT characteristics at their 230 kV
Alamathy SS.
Mail received on 10-11-2016 & 20.12.2016:
1. The Bus Bar Protection scheme will be tested for healthiness including the CT circuits.
2. High impedance BBP relay will be replaced by Numerical relay.
Status received vide mails dated 10.01.2017 & 12.04.2017 & 01.06.2017 & 15-06-2017:
1. The Bus Bar Protection scheme was tested for healthiness including the CT circuits. AREVA
make CTs in Alamathy SS are having different kneepoint voltage for the cores. CT cores of higher
knee point voltage has been choosen for BBP in 230kV Korattur, 230kV OPG-1 & 230kV OPG-2
feeders on 29.11.2016. ---- Completed.
2. High impedance BBP relay will be replaced by Numerical relay. --- Pending,
Status received vide mails dated 04.08.2017 & 18.09.2017 & 31-10-2017 & 12-12-2017.
1. ---- Completed
2. High impedance BBP relay will be replaced by Numerical relay. --- Pending
Review Meeting dated 19.12.2017:
2) TANTRANSCO informed that Numerical BBP would be provided by April, 2018 --- Pending
TANTRANSCO mail received on 25-01-2018:
1. --- Complied.
2. High impedance BBP relay will be replaced by Numerical relay. Timeline: April-2018.
TANTRANSCO MAIL DATED 22.05.2018 & 08.06.2018 & 23.07.2018:
2.Numerical BBP relay will be provided. Timeline: Sep-2018.
TANTRANSCO MAIL DATED 29.08.2018 & 11.09.2018:
1. Complied
2.Numerical BBP relay will be provided. Timeline: Sep-2018.
TANTRANSCO
Annexure-II
Page 34 of 47
15-09-2016 at 22:14
hrs
Bus Bar Protection (Zone1) of 230kV Bus-A got operated
at Alamathy Station during fault in 230 kV Alamathy-
OPG-1 feeder.
Pending58/II/17 Multiple tripping at 230 kV
Alamathy Station
1. TANTRANSCO to check the healthiness of BBP relay by
conducting stability test, and take appropriate remedial
action like increasing voltage settings, ensuring the
healthiness of CT’s, using CT’s with similar characteristics
(equal saturation effects & equal winding resistances) etc. at
their 230 kV Alamathy SS.
2. TANTRANSCO to replace the existing high-impedance BBP
relay with its low-impedance/ numerical variant so as to
accommodate variation in CT characteristics at their 230 kV
Alamathy SS.
Mail received on 10-11-2016 & 20.12.2016:
1. The Bus Bar Protection scheme will be tested for healthiness including the CT circuits.
2. High impedance BBP relay will be replaced by Numerical relay.
Status received vide mails dated 10.01.2017 & 12.04.2017 & 01.06.2017 & 15-06-2017:
1. The Bus Bar Protection scheme was tested for healthiness including the CT circuits. AREVA
make CTs in Alamathy SS are having different kneepoint voltage for the cores. CT cores of higher
knee point voltage has been choosen for BBP in 230kV Korattur, 230kV OPG-1 & 230kV OPG-2
feeders on 29.11.2016. ---- Completed.
2. High impedance BBP relay will be replaced by Numerical relay. --- Pending,
Status received vide mails dated 04.08.2017 & 18.09.2017 & 31-10-2017 & 12-12-2017.
1. ---- Completed
2. High impedance BBP relay will be replaced by Numerical relay. --- Pending
Review Meeting dated 19.12.2017:
2) TANTRANSCO informed that Numerical BBP would be provided by April, 2018 --- Pending
TANTRANSCO mail received on 25-01-2018:
1. --- Complied.
2. High impedance BBP relay will be replaced by Numerical relay. Timeline: April-2018.
TANTRANSCO MAIL DATED 22.05.2018 & 08.06.2018 & 23.07.2018:
2.Numerical BBP relay will be provided. Timeline: Sep-2018.
TANTRANSCO MAIL DATED 29.08.2018 & 11.09.2018:
1. Complied
2.Numerical BBP relay will be provided. Timeline: Sep-2018.
TANTRANSCO
Annexure-II
Page 35 of 47
64/1/4 Complete outage of North
Chennai TPS STG-1
26-03-2017
at 23:14hrs
Tripping of evacuating lines due to fault led to tripping of
running Unit at NCTPS Stg-1
1. TANTRANSCO to take steps to complete insulator
replacement works on the 230 kV lines owned by them in
NCTPS area within 6 months.
2. TANTRANSCO to take steps to implement A/R on all 230 kV
lines emanating from NCTPS-I at the earliest.
TANTRANSCO Status received vide mails dated 04.08.2017 & 18.09.2017 & 31-10-2017:
1. All the Porcelain insulators were replaced with Polymer insulators in 230kV NCTPS-I -
Tondiarpet feeders - 1 & 2.
---- Completed
2. AR will be implemented on all 230kV lines emanating from NCTPS-I. --- Pending
Status received vid email dated 12-12-2017:
1. Completed
2. The scheme needs modification to enable AR, since AR was not envisaged for this station
during commissioning. AR will be implemented on all 230kV lines emanating from NCTPS-I
within six months. --- Pending
Review Meeting dated 19.12.2017:
2) TANTRANSCO informed that A/R would be implemented on all 230 kV lines emanating from
NCTPS-I by June, 2018.
TANTRANSCO mail received on 25-01-2018:
1. Complied.
2. The scheme needs modification to enable AR, since AR was not envisaged for this station
during commissioning. AR will be implemented on all 230kV lines emanating from NCTPS-I
within six months. Timeline:June-2018.
Pending
TANTRANSCO MAIL DATED 22.05.2018:
2. The scheme needs modification to enable AR, since AR was not envisaged for this station
during commissioning. AR will be implemented on all 230kV lines emanating from NCTPS-I
Timeline:Sep -2018.
TANTRANSCO mail received on 08-06-2018:
1. Complied.
2. The scheme needs modification to enable AR, since AR was not envisaged for this station
during commissioning. AR will be implemented on all 230kV lines emanating from NCTPS-I
Timeline:Sep -2018.
TANTRANSCO MAIL DATED 23.07.2018:
AR implemented for 4 feeders and remaining lines will be provided with AR subsequently.
TANTRANSCO MAIL DATED 29.08.2018:
1. Complied
2. AR enabled for 3 feeders.
TANTRANSCO MAIL DATED 11.09.2018:
1. Complied
2. AR enabled for 5 feeders.
73/I/6 Complete outage of 400 kV
Sriperumbudur station
24-03-2018 at 18:01
hrs
There was HV side Y-phase CT failure of 400/ 230 kV ICT-
2 at Sriperumbudur. This resulted in tripping of all
connected feeders and ICTs.
1) TANTRANSCO to ensure healthiness of 400 kV side CB of
ICT-3 (CB-1752) and integrity of its LBB protection.
2) TANTRANSCO to furnish equipment failure report of the
current incident (CT blast) to PSE&TD Division of CEA with a
copy marked to SRPC.
3) TANTRANSCO to refer the instant case of PRV operation of
ICT-1 to its OEM, and take appropriate action based on their
advice.
TANTRANSCO TANTRANSCO MAIL DATED 22.05.2018 & 08-06-2018:
1. 96 relay operation checked and scheme operation ensured.
----Complied
2. Failure Report will be sent to CEA
----Pending
3.Issue will be refered with OEM and appropriate action will be taken
----Pending
TANTRANSCO MAIL DATED 23.07.2018:
OEM being referred to attend the issue
Status received vide mail dated 25.07.2018:
Under Implementation.
TANTRANSCO MAIL DATED 29.08.2018 & 11.09.2018:
Failure report will be sent OEM being referred to attend the issue
Pending
Annexure-II
Page 36 of 47
77/II/9 Multiple trippings at
400 kV Manali Substation
TANTRANSCO to refer the issue of selective tripping of 400 kV
side breakers, and non-tripping of 230 kV side breakers due
to operation of Densimeters on low pressure in the instant
case to their OEM, and share OEM’s advice/ remedy in this
regard.
TANTRANSCO mail dated 11.09.2018:
OEM will be referred
PED
Annexure-II
Page 37 of 47
KSEB Mail received vide dated 17.01.2017:
1. 110 kV bus bar protection progressing ----Pending
2. Connection of 220kV earth mat and 110 kV plate earthing system completed.---- Completed
3. Redundancy of 110V DC system in progress. Complete independent redundancy is not
practical for the time being. 48 V DC redundancy was already there. ----Pending
4. Instead of stand alone event logger, SCADA system of 110 kV feeder is expected to be
completed by the end of 2017. SCADA system of 220kV side will be taken up after that ----
Pending
KSEB Mail received vide dated 18.09.2017:Status received vide mail dated 12-12-2017:
1. Detailed engineering of the scheme has been completed. Material procurement is in
progress. ---Pending
2.,3. ---- Completed
4. The SOE and DR are available with time stamping from the numerical relays. Hence stand
alone event logger is not necessary ----- Completed
68/II/12 Tripping of 400 kV NPS – Nellore-
PG D/C line
08-10-2017
at 18:58 hrs
Lines tripped during a fault on 400 kV Nellore-PG –
Vijayawada line-2
1. For the 400 kV Nellore-PG – Vijayawada line, PGCIL (SR-I) to
investigate the reasons for 3-ph tripping of Main-CB upon
detection of the fault without trying for A/R and operation of
Stub/ Tee protection at the time of Tie-CB A/R attempt at
Vijayawada end during instant trippings, and furnish remedial
measures taken to address the issues involved.
2. PGCIL (SR-I) to test the recently commissioned CSD’s at
their 400 kV Nellore-PG SS at the earliest and ensure their
correct operation.
3. PGCIL (SR-I) to configure DR’s and EL’s of Distance
Protection Relays at Nellore-PG with suitable LEGENDs for
indicating operation of type of protections (like Zone-1, Zone-
2, Zone-3, DEFR, OVR-I, OVR-II, etc.).
PGCIL (SR-I) PGCIL-SR1 Mail dated 15.12.2017 & Review Meeting dated 19.12.2017:
1. --- Pending.
2. Due to CSD contractor problem CB Y-pole reclosed & defective contactors replaced & wiring
problem in CSD rectified on next day --- Completed.
3. NPS end DR & EL configured as suggested. --- Completed.
PGCIL (SR-I) mail dated 20.06.2018:
1. Line A/R scheme checked at VJA end during the S/D on and A/R scheme is operating correctly
for both Main & Tie CBs, A/R sucessful at both ends during the trippings on 03.05.2018. At VJA
end Stub protection checked & found relay faulty & the same was replaced with spare relay on
22.03.2018 during line S/D.
Pending
74/III/4Tripping of 400 kV
Maheshwaram - Narnoor line
03-04-2018 at 12:28
hrs
B-phase to earth fault occurred in line. Auto-reclose was
successful at Maheshwaram and Auto reclose was not
attempted at Kurnool (AP).
PGCIL (SR-I) to furnish a detailed report on the reasons for
the tripping of the line including remedial measures taken. PGCIL (SR-I)
PGCIL (SR-I) mail dated 20.06.2018:
The protection operation at Maheshwaram (POWERGRID) end is in order. Ony permissive PLCC
code was transmitted from POWERGRID end.
At Narnoor (APTRANSCO) en, NO DT signal receive was recorded in DR (from DR & Eluploaded
by AP in SRLDC trip portal. The EL list uploaded by AP is BCU internal events. The BCU was
recently commissioned by APTRANSCO under SAS upgradation. The spurious DT signal high in
BCU might be wrong wiring/configuration of BCU.
Pending
74/III/11Tripping of Ramagundam -
Hyderabad line-4
08-04-2018 at
05:16hrs
Y-phase to earth fault. Auto-reclose was successful at
Ghanapur end. Ramagundam end did not attempt auto-
reclose as there was operation of distance protection
Zone-2 leading to tripping of breaker.
For the line under consideration, the following shall be
carried out by NTPC-Ramagundam, in coordination with
PGCIL (SR-I):
(i) End-to-end communication for DT/ permissive & other
signals may be ensured by testing at both the ends.
(ii) Healthiness of PLCC system components (hardware and
software) at both ends shall be checked and faulty
components shall be repaired/ replaced.
PGCIL (SR-I)
PGCIL (SR-I) mail dated 20.06.2018:
PLCC end to end testing, Relay testing completed & verified and found ok- on 21.02.2018 during
line S/D. However same will be checked during the next shutdown.
Pending
Complete outage of 220 kV
Kalamassery Substation
58/I/1
(GD)
Triggering incident was conductor snapping in 110 kV
Kalamassery- Kaloor feeder
PGCIL (SR-I) & PGCIL (SR-II)
PendingKSEB to take steps to provide the following at their 220/ 110
kV Kalamassery SS:
1. Busbar protection at 110 kV level
2. Connecting 220 kV and 110 kV sides on to a common
earthmat
3. Redundant DC supply for both protection (220 V) and
communication (48 V) applications
4. Stand-alone Event Logger
23-08-2016
at 11:20 hrs
KSEB
Annexure-II
Page 39 of 47
75/II/6Multiple trippings at 400 kV
Raichur-PG SS
03-05-2018
at 18:03 hrs
400 kV RTPS – Raichur PG line-2 tripped due failure of LA
in B-phase at Raichur-PG end. 400 kV RTPS – Raichur PG
line-1 & 400 kV Raichur (PG) - Gooty line-1 tripped on
operation of Over-voltage, stage-II protection.
1) PGCIL (SR-I) to set right issues w.r.t. carrier communication
on 400 kV Raichur-PG – RTPS line-2.
2) PGCIL (SR-I) to refer instant trippings to CTU to carry out
Electro Magnetic Transient Phenomena/ Program (EMTP)
analysis, and obtain suitable advice.
3) PGCIL (SR-I) to adopt new OVR-I gradings issue vide SRPC
letter dated 01.05.2018 at their 765/ 400 kV Raichur-PG SS.
PGCIL (SR-I)
Yet to be Informed
Pending
73/II/8 Tripping of 400 kV Pavagada-
Tumkur line-1, 400/ 220 kV ICT-
1&2 at 400 kV Pavagada SS
16-03-2018 at 14:18
Hrs
Multiple trippings occurred during charging of 400 kV
Pavagada-Tumkur line-2.
1) PGCIL (SR-II) to review SOTF settings at Tumkur end on
Tumkur – Pavagada lines considering the least expected fault
current levels.
PGCIL (SR-II) Yet to be Informed Pending
73/II/9 Tripping of HVDC Talcher-Kolar
Pole-1.
17-03-2018 at 15:12
hrs
Talcher – Kolar Pole-1 tripped due to mal operation of
DC protection system at Talcher end and Emergency
Switch OFF (ESOF) signal received at Kolar end.
PGCIL (SR-II) to furnish a detailed report on the instant
tripping explaining clearly the reasons for repeated voltage
recovery sequences, reasons for Pole-2 going into ground
return mode while attempting Pole-1 de-block around 20:28
hrs, and non-operation of SPS
(i) at around 15:12 hrs when the Pole-1 was blocked, and
(ii) at around 20:28 hrs when Pole-2 went into ground return
mode.
PGCIL (SR-II) Yet to be Informed Pending
73/III/4 Tripping of 400 kV ILFS-
Nagapattinam PS line-1.
28-03-2018 at 10:32
Hrs
R-phase to earth fault had occurred in line. Auto-reclose
attempt could not be validated with submitted DR of
Nagapattinam end.
PGCIL (SR-II) to furnish a report on the reasons for A/R non-
operation, and the remedial action taken to rectify the same.
PGCIL (SR-II) Yet to be Informed Pending
74/II/20 Tripping of 400/ 220 kV ICT-2 at
Somanahalli
25-04-2018 at
15:23hrs
ICT-2 got tripped due to mal-operation of Buchholtz’s
relay.
1). PGCIL (SR-II) to take steps to replace the faulty PNRV’s of
the ICT’s with the proposed reverse flow blocking devices at
the earliest at their Bidadi, Somanahalli, and Pavagada
stations.
2). PGCIL (SR-II) to configure Event Loggers (EL’s) to capture
events msec level at their Somanahalli SS.
PGCIL (SR-II) Yet to be Informed Pending
Annexure-II
Page 40 of 47
75/II/5 Tripping of 400 kV Kolar –
Tiruvalam line
03-05-2018
at 23:40 hrs
Line tripped on operation of Over-Voltage Stg-1
protection at Kolar and Direct Trip was received at
Tiruvalam. It’s Y-ph voltage was observed to be 5kV
higher when compared to R & B phase voltages at Kolar.
PGCIL (SR-II) to configure Event Loggers of various protection
relays at their Kolar SS to record events with time stamp that
contains all denominations of time, viz., Hours, Minutes,
Seconds, and Milliseconds.
PGCIL (SR-II) Yet to be Informed Pending
25-07-2018
at 01:53 hrs
29-07-2018
at 02:02 hrs
Tripping of 400 kV Guttur-
Narendra-PG line-1
77/II/13 Line tripped on operation of over-voltage protection at
Guttur. DR & EL not furnished to validate the tripping
PGCIL (SR-II) to check for healthiness of line CVT’s at Guttur
end on 400 kV Guttur – Narendra-PG line-1, and take
appropriate action including their replacement.
PGCIL (SR-II)
Annexure-II
Page 41 of 47
Others
PendingNPCIL (MAPS)B-phase CT failure occurred in 230 kV S.P.Koil - MAPS
line-1. Busbar protection got operated at SP.Koil station.
All elements except 230kV Oragadam and 230kV
Kalivandapattu got tripped at 230kV S.P.Koil station. ‘Y’
phase CT and support insulators also got damaged.
1.MAPS to furnish a detailed report on the tripping of SP Koil
– MAPS lines 1 & 2 at MAPS end with focus on the
correctness of the settings of Main-I & Main-II relays (for
primary & back-up protections) on both the lines.
2.MAPS to take steps to provide down-loading facility for DR
& EL from Main-I & Main-II relays on all 230 kV lines
emanating from MAPS.
3.MAPS, in co-ordination with SP Koil, to carry out PLCC end-
to-end testing, on SP Koil – MAPS lines 1 & 2, and ensure
healthiness of PLCC communication & carrier-aided
protection.
4.MAPS to put in service Auto-Reclosure feature on all four
230 kV lines emanating from MAPS by June, 2016.
54/I/1 02-04-2016 at 17:08
hrs
Status revided vide MAPS mail dated 06.12.2016;
1. The settings given by M/s TANTRANSCO were adopted for Main –I & Main- II relays for both
the lines. The same settings were verified to be same. Subsequently calibrated was done and
no drift was observed. --- Completed
2. From May 2016 onwards, the DR, EL and trip report are being sent by mail to SRLDC,
Bengaluru by MAPS. --- Completed
3. Monthly maintenance of PLCC equipments is being done by M/s TANTRANSCO. At present
PLCC telephone is not working, it is being followed up. --- Completed
4. CVTs are planned to be procured from M/s TANTRANSCO by the end of February 2017 and
A/R will be implemented for all the lines emanating from MAPS by July-2017 as discussed in the
current SRPC meeting on 25/11/2016. --- Pending
Status received vide MAPS mail dated 06.12.2016 & Review Meeting dated 19.12.2017;
The CVTs procurement is in progress and the scheme (A/R) would be implemented before 31-
03-2018.
Complete outage of 230 kV
S.P.Koil Station of TANTRANSCO
Annexure-II
Page 42 of 47
62/III/2 Tripping of 400 kV Kaiga-Guttur
line-1
06-02-2017
at 05:01 hrs
B-phase to earth fault. Line did not auto-reclose at Kaiga
end.
1. KGS to properly configure all relays DR’s time scale for a
post-triggering period of 2 sec to capture events such as
complete A/R operation.
2. KGS to ensure time-synchronization of all protection relays
with GPS in their 400 kV switchyard.
NPCIL (KGS) Status received vide mail dated 29.11.2017 & Review Meeting dated 19.12.2017:
1. All 400kv transmisisonlines relays DR time scale for a post-triggering period of 2 sec is
implemented. ----Completed
2.Time-synchronization for all lines protection relays (M1 &M2) with GPS in their 400 kV
switchyard is being implemeneted. Scheme design is in process. ECD-April-2018 ---- Pending
NPCIL (KGS) Reply during Special Meeting at Kaiga dated 22.06.2018:
2. KGS agreed to ensure time-synchronization of all protection relays with GPS in their 400kV
swithcyard by Dec 2018. --- Pending
Status received vide mail dated 29.11.2017 & Review Meeting dated 20.08.2018:
Scheme for the same has been issued & Procurement is initiated. ECD for implementation-
December-2018
NPCIL (KGS) mail dated 10.09.2018 & 24.09.2018:
By December-2018. GPS procurement action taken.
Pending
69/I/1 Complete outage of 400kV TPCIL
station
25-10-2017 at 19:33
hrs
400 kV TPCIL-Nellore PS line-1 got tripped from TPCIL
end during fault in 400kV Nellore-Nellore PS line-2.
Running units at TPCIL got tripped due to loss of
evacuating line. 400kV Nellore PG - Nellore PS line-2 and
400kV TPCIL - Nellore PS line-1 were under shutdown.
TPCIL to configure DEF protection such that it remains in
blocked condition as long as Distance Protection is active, and
becomes active only when distance protection does not
pickup.
TPCIL Yet to be informed Pending
Annexure-II
Page 43 of 47
NLCIL Mail dated 18.01.2018:
1. Shut down was taken on 400kV Neyveli TS-II to Pugalur feeder on 18-01-18 to check the end-
to-end communication for DT/ permissive & other signals by testing at both the ends and to
check the healthiness of the PLCC system components.
The system was thoroughly checked and the missing loops in the relay circuit (Carrier send in
Main1 relay and Carrier receive in Main2 relay) were provided.NLCIL Mail dated 24.04.2018:
1. Completed.
2. The tripping of Pugalur feeder on 10-10-2017 at 23:54 hrs as per PCSC recommendation, the
Defective relay P437 was replaced with spare P437 relay and the settings were checked.The
spare relay replacement work carried out on 26& 27th March at the time shut down of Pugalur
feeder.
71/III/1 Tripping of 400 kV HNPCL- KV
Kota line-2
26-12-2017 at 12:34
hrs
R-phase to earth fault had occurred in line. Breakers at
HNPCL got tripped due to auto-reclose lockout and auto-
reclose was successful at KV Kota end.
HNPCL to furnish a report detailing the reasons for A/R non-
operation in the instant tripping, and remedial measures
taken to set right them.
HNPCL HNPCL Mail dated 12.05.2018:
CB close interlock gone to “self-check Fault” state during the AR cycle. Due to that AR gone to
lockout state. Breaker open state CB close interlock should be satisfied condition.Accordingly
the logic has been modiified.
Pending
72/III/5 Tripping of 400 kV HNPCL - K.V.
Kota line
02-02-2018 at 11:46
hrs
Tripped due to R-phase to ground fault. Line did not
reclose at HNPCL.
1. HNPCL to configure DEF protection such that it remains in
blocked condition as long as Distance Protection is active, and
becomes active only when distance protection does not
pickup.
2. HNPCL to ensure healthiness of A/R scheme implemented
on all 400 kV lines at their station.
HNPCL APTRANSCO maild ated 24.04.2018 & 24.05.2018:
To be attended by HNPCL
HNPCL maild ated 12.05.2018:
1....Pending
2.CB close interlock gone to “self-check Fault” state during the AR cycle. Due to that AR gone to
lockout state. Breaker open state CB close interlock should be satisfied condition.Accordingly
the logic has been modiified.
Pending
73/I/3 Complete outage of following
220kV stations of KPTCL
Narendra (KPTCL), Bidnal, SRS
Hubballi, Ambewadi Haveri,
Karwar, Belgaum, Chikkodi,
Soudatti, ML Pura, Athani,
Kudachi, Ghataprabha, MK
Hubli, NPH, Kodasalli and Kadra
08-03-2018 at 10:01
hrs
220kV Kaiga-kadra and 220kV Kadra-Kodasalli lines
tripped on backup over-rcurrent protection. 400/220kV
Narendra ICT tripped on over load protection. Running
units at Nagjhari and Kodasalli tripped due to non-
availability of evacuation lines. Cascaded tripping
occurred due to overloading of 220 kV network and
there was complete outage of several stations of KPTCL.
1). NPCIL (KGS) to use stipulated formats for furnishing FIR
and TR.
2). NPCIL (KGS) to configure DR’s & EL’s of all protection
relays at their 400 kV & 220 kV Kaiga GS for recording all
mandated protections.
NPCIL (KGS) NPCIL(KGS) Reply during Special Meeting at Kaiga dated 22.06.2018:
1.KGS agreed to use stipulated formats for furnishing FIR and TR
---- Completed
2.KGS agreed to include line backup protections in Main-I & Main-II within 2 months and
configure DR's and EL's of Main -I & II for recording all mandated protections --- Pending
NLCIL Mail dated 20.08.2018 & 10.09.2018 & 24.09.2018:
KGS 1&2 Scheme has been finalised. Designer approval Obtained. It will be implemented along
with lione shutdown work and it is proposed to be taken up after monsoon (Sep-Oct).
Pending
69/II/9 Tripping of 400 kV Neyvelli TS2 –
Pugalur and 400 kV Neyvelli TS2
(exp) – Pugalur line
10-10-2017 at 23:54
hrs
Protection at NLCTS-2 & NLCTS-2 Exp has sensed as R-Y-
E fault and given a 3 phase trip. At Pugalur end
protection has sensed fault as Y-N and B-N fault in
400kV Neyveli TS2-Pugalur line & 400kV Neyveli TS2 EXP-
Pugalur line respectively. Breaker at Pugalur got tripped
due to Direct Trip receipt.
1.For the tripping of 400 kV NLC TS2 – Pugalur line, NLCIL to
investigate the reasons for sending of DT to Pugalur end, and
furnish an action taken report including remedial action
taken and setting right various LEGEND issues in DR & EL of
protection relays to PCSC forum.
2. For the tripping of 400 kV NLC TS2Exp – Pugalur line, NLCIL
to investigate the reasons for 3-ph tripping (detection of the
fault as Y-B-E) of the line from NLC TS2Exp end including
verifying pertinent settings of P437 relay (reference may be
made to explanation given by TPCIL in GD - I.1/ GD - I.2), and
furnish an action taken report including remedial action
taken and setting right various LEGEND issues in DR & EL of
protection relays to PCSC forum.
NLCIL Pending
Annexure-II
Page 44 of 47
74/II/12 Tripping of 400 kV Bellary PS -
JSWEL line
16-04-2018 at 16:16
hrs
Main#2 (ABB REL 670) relay’s SOTF protection mal-
operated at JSWEL. DT sent to BTPS
1). It was noted from DR that there was an R-E fault at the
time of occurrence of above tripping, which might have
(wrongly) led to SOTF initiation; hence logic employed for
SOTF protection operation needed to be checked.
2). JSWEL was asked to check whether interlock with CB OPEN
status has been properly incorporated in SOTF logic.
JSWEL Yet to be Informed Pending
75/II/2 Tripping of 400kV Hinduja-
K.V.Kota line-2
01-05-2018
at 10:12 hrs
Line-2 tripped on Direct Trip receipt at KV Kota end. At
the same time there was an un-successful auto-reclose
attempt in line-1 due to persistent fault in B-phase.
1) HNPCL to attend PCSC meetings regularly esp. when
tripping events relating to their plant are included in the
Agenda.
2) HNPCL to follow the stipulated File Naming Nomenclature
for naming various tripping files being uploaded in TMS
portal of SRLDC.
3)HNPCL to sort out A/R related issues on 400 kV HNPCL – KV
Kota D/C lines, and put A/R into service from HNPCL end.
4)HNPCL to furnish a detailing tripping report of the event
including remedial measures taken to prevent their
recurrence.
5)HNPCL to configure DR’s & EL’s various protection relays at
the plant to record all mandated protections.
HNPCL Yet to be Informed Pending
76/II/19 Tripping of 400 kV JSWEL-BPS-2
& 400 kV BPS-YTPS line-2
27-06-2018 at 17:24
hrs
400kV JSWEL-BPS line-2 tripped at BPS end on Direct
Trip receipt. This happened during R- phase to earth
fault occurred in 400kV BPS – YTPS line-2.
1) JSWEL to attend to PCSC meetings regularly esp. when
tripping events pertaining to their system are included in the
Agenda.
2) JSWEL to furnish relevant tripping files (FIR/DR/EL/TR)
within 24-hrs of occurrence of a tripping event involving their
system to SRLDC in line with IEGC Regulation 5.2 (r).
3) JSWEL to furnish a detailed report after rectifying issuing
relating to operation of SOTF protection and spurious DT
sending to remote ends from JSWEL end on 400 kV JSWEL –
BPS lines – 1 & 2.
JSWEL Yet to be Informed Pending
76/IV/1 Tripping of 400kV JSWEL-BPS line-
1
03-06-2018 at
16:03hrs
B-phase to earth fault occurred in 400kV YTPS-BPS line-
1. 400kV JSW-BPS line-1 got tripped due to spurious DT
send from JSWEL end.
JSWEL to furnish a detailed report after rectifying issuing
relating to operation of SOTF protection and spurious DT
sending to remote ends from JSWEL end on 400 kV JSWEL –
BPS lines – 1 & 2.
JSWEL Yet to be Informed Pending
08-07-2018
at 20:10 hrs
1) JSWEL to attend to PCSC meetings regularly esp. when
tripping events pertaining to their system are included in the
Agenda.
2) JSWEL to furnish a detailed report after rectifying issuing
relating to operation of SOTF protection and spurious DT
sending to remote ends from JSWEL end on 400 kV JSWEL –
BPS lines – 1 & 2.
Tripping of 400kV JSWEL Bellary
PS line-2
77/II/6 JSWEL Yet to be Informed Pending
Annexure-II
Page 45 of 47
09-07-2017
at 16:17 hrs
1) JSWEL to attend to PCSC meetings regularly esp. when
tripping events pertaining to their system are included in the
Agenda.
2) JSWEL to furnish a detailed report after rectifying issuing
relating to operation of SOTF protection and spurious DT
sending to remote ends from JSWEL end on 400 kV JSWEL –
BPS lines – 1 & 2.
Tripping of 400kV JSWEL Bellary
PS line-2
77/II/6 JSWEL Yet to be Informed Pending
Annexure-II
Page 46 of 47
77/III/1 Tripping of 400 kV CEPL
–Tuticorin PS line-2
02-07-2018 at 16:38
hrs
Line tripped on R-phase to earth fault. Main-CB
(413-52) at Tuticorin PS end auto-reclosed successfully.
At CEPL end, there was Gr - A/B operation resulting in R,
Y, & B phase trip. Direct trip sent observed in DR of
Tuticorin PS.
CEPL to furnish a detailed report bringing out the reasons for
A/R non-operation at their end for the subject tripping, and
the remedial measures taken to correct the same to PCSC
forum.
CEPL Yet to be Informed Pending
Annexure-II
Page 47 of 47
Sl.No. Element Name Outage date/time Revival date/time Reason for outage Sender/ Receiver Remedial Measures/ Actions taken
1220KV-YERRAANDAHALLI-HOSUR_TN-
110-05-2018/11:50:00 10-05-2018/12:18:00 C-N fault KPTCL/ TANTRANSCO
TANTRANSCO:
Passing fault.
KPTCL:
Tree trimming to be done.
2400KV-NAGAPATTNAM_PS-
NEYVELI_TS_II28-05-2018/13:17:00 28-05-2018/13:48:00
TRIPPED ON SINGLE PHASE
TO GND FAULTPGCIL (SR-II)/ NLCIL
NLCIL :
The feeder got tripped on Zone 2
distance protection due to a fault in NPS-
ILFS feeder.
PGCIL (SR-II):
Tripped on R-B fault.Relay checked in
translay and found ok.
3 400KV-GUTTUR-HIRIYUR-1 01-06-2018/13:10:00 DT RECEIVED KPTCL/ PGCIL (SR-II)To-be-discussed
4 400KV-GUTTUR-HIRIYUR-2 01-06-2018/15:38:00B phase light arrester
flashoverKPTCL/ PGCIL (SR-II)
PGCIL (SR-II):
LA flashover at Guttur end. May be
clarified by KPTCL.
5 400KV/220KV GUTTUR-ICT-1 01-06-2018/19:01:00 01-06-2018/19:34:00 RELAY MALOPERATION KPTCLKPTCL:
6 400KV-NELLORE_PG-THIRUVALAM-1 02-06-2018/19:24:00 02-06-2018/19:35:00 TRIPPED ON Y-N FAULT PGCIL (SR-I)/ PGCIL (SR-II)
PGCIL(SR1):
Line tripped on Y-N fault. A/R
attempted sucessfully and line tripped
on persisitng Y-N fault. From NLR
distance: M1:138.3 kms, FC: 3.5kA &
M2: distance 139.3kms, FC:3.1kA. From
TVLM end distance M1 distance 46.5
kms, FC: 7.5kA & M2 distance 46.2 kms,
FC: 7.45 kA.
Fault distance comes under SR-2 TLM
Jurisdiction
7 220KV-AMBEWADI-PONDA-1 10-06-2018/09:29:00 10-06-2018/09:50:00 TRIPPED ON B-N FAULT KPTCL KPTCL:
8 400KV-HOODY-NELAMANGALA-1 15-06-2018/12:12:00 15-06-2018/13:03:00 PLCC MAL OPERATION KPTCL KPTCL:
Pending Remedial Measures/ Actions taken for the Critical Tripping Incidents (as on 09.10.2018)
Annexure-III
Page 1 of 7
9 400KV-BIDADI-TUMKUR-2 15-06-2018/16:20:00 15-06-2018/17:03:00R Phase distance
protection operatedPGCIL (SR-II)/ KPTCL
PGCIL (SR-II):
Line owned and maintained by KPTCL.
KPTCL:
10 400KV-GUTTUR-JINDAL-1 22-06-2018/06:05:00 TRIPPED ON R-N FAULT KPTCL/ JSWEL
KPTCL:
JSWEL:
11 220KV-AMBEWADI-PONDA-2 28-06-2018/00:56:00 DISTANCE PROTECTION KPTCL/ GED KPTCL:
12400KV/110KV SUNGAVARACHATRAM-
ICT-302-07-2018/19:53:00 02-07-2018/23:15:00
Tripped on LV side Y-Ph LA
blastTANTRANSCO
TANTRANSCO:
DEFECTIVE LA's was isolated and ICT-3
was normalised.
13 220KV-KADAKOLA-KANIYAMPETTA 16-07-2018/12:49:00 16-07-2018/16:38:00 R-PHASE FAULT KPTCL/ KSEBL
KSEBL: Tripped at Kadakola end. AG
fault, tree fallen in KPTCL portion of the
line. No source from Kaniyambetta as
2KDKN feeds radially to Kaniyambetta ss
. The CB in 2ARKN open at
Kaniyambetta end
KPTCL:
14 220KV-AMBEWADI-XELDEM 01-08-2018/15:02:00 DISTANCE PROTECTION KPTCL To-be-discussed
15400KV/110KV SRIPERUMBADUR_TN-
ICT-404-08-2018/18:36:00 14-08-2018/21:45:00
HIGH WINDING
TEMPERATURETANTRANSCO
To-be-discussed
16 220KV-AMBEWADI-PONDA-1 12-08-2018/21:31:00 TRIPPED ON Y-N FAULT KPTCL To-be-discussed
17 400KV-NELAMANGALA-TALGUPPA-1 13-08-2018/09:24:00To facilitate sharavathi
generationKPTCL
To-be-discussed
18 400KV/220KV SUNDILA-ICT-1 13-08-2018/17:05:00 13-08-2018/18:39:00 MAL-OPERATION ER TSTRANSCO
TSTRANSCO:
Informed Shift official to take care in
tripping of the breakers.
19 220KV-SEDAM-TANDUR-1 14-08-2018/22:15:00 14-08-2018/22:50:00 Y PHASE FAULT KPTCL/ TSTRANSCO
TSTRANSCO:
Line is under open condition at Tandur.
20 220KV-KADAKOLA-KANIYAMPETTA 16-08-2018/13:25:00 phase to phase fault KPTCL/ KSEBL
KSEBL: Tripped at Kadakola end. CG
fault in KPTCL portion of the line. No
source from Kaniyambetta as 2KDKN
feeds radially to Kaniyambetta ss . The
CB in 2ARKN open at Kaniyambetta end.
KPTCL:
21 400KV/220KV TALGUPPA-ICT-1 17-08-2018/01:56:00 PRV OPERATED KPTCLTo-be-discussed
Annexure-III
Page 2 of 7
22 400KV-MARADAM-KALPAKKA-1 19-08-2018/02:02:00 DT received at Kalpaka APTRANSCO
APTRANSCO:
Feeder tripped on over voltage at
Maradam end and on DT receive at
kalpaka end
23 220KV-AMBEWADI-XELDEM 22-08-2018/11:30:00 22-08-2018/15:10:00 LINE TO GROUND FAULT KPTCL/ GED To-be-discussed
24 220KV-AMBEWADI-XELDEM 30-08-2018/12:08:00 30-08-2018/12:47:00 TRIPPED ON B-N FAULT KPTCL/ GED To-be-discussed
25 220KV-KADAKOLA-KANIYAMPETTA 30-08-2018/09:08:00 TRIPPED DUE TO R-N FAULT KPTCL/ KSEBL
KSEBL: Tripped at Kadakola and
Kaniyambetta ende. AG fault in KPTCL
portion of the line. No source from
Kaniyambetta as 2KDKN feeds radially
to Kaniyambetta ss . The CB in 2ARKN
open at Kaniyambetta end.
Kaniyambetta end tripped and reclosed
but as no source from Kaniyambetta no
supply in line.Tree fallen in location 234.
KPTCL:
26 400KV-KALPAKKA-KHAMMAM-2 01-09-2018/12:20:00 01-09-2018/14:36:00 DT received at Kalpaka APTRANSCO/ PGCIL (SR-I)
APTRANSCO:
Feeder tripped on DT receive at Kalpaka
end (Retrofitting works are being
carried out by ABB on 400kV Simhadri
feeder at 400kV Kalapaka SS. During
retrofitting works it was suspected that
DC supply lead might got touched the
ground and created DC earth fault
causing extended the direct trip (DT
send) from Kalapaka end to the
Khammam. The 400kV Kalapaka -
Khammam got tripped at Khammam on
DT Receivd and feeder was holding from
Ka;apaka end. After some time tripped
at Kalapaka end on DT receive.)
27400KV-NAGARJUNASAGAR_PG-
RAMAGUNDAM LINE-102-09-2018/20:55:00 02-09-2018/21:45:00 Tripped on Y-B Fault PGCIL (SR-I)/ NTPC
To-be-discussed
28400KV-GOOTY-NELAMANGALA-1 FSC
at GOOTY03-09-2018/06:21:00 OCTADYNE PROBLEM PGCIL (SR-I)/ KPTCL
To-be-discussed
29 400KV-GOOTY-NELAMANGALA-1 03-09-2018/11:23:00 03-09-2018/12:47:00EARTH FAULT RELAY
OPERATEDPGCIL (SR-I)/ KPTCL
To-be-discussed
Annexure-III
Page 3 of 7
30 400KV-NELAMANGALA-TALGUPPA-1 03-09-2018/11:25:00 TRIPPED ON B-N FAULT KPTCLTo-be-discussed
31 400KV-GOOTY-SOMANAHALLI-1 04-09-2018/12:36:00 04-09-2018/18:04:00FSC PROTECTION
OPERATEDPGCIL (SR-I)/ PGCIL (SR-II)
To-be-discussed
32 400KV-VIJAYAWADA-VEMAGIRI_PG-1 06-09-2018/10:52:00 06-09-2018/15:27:00 TRIPPED ON R-N FAULT PGCIL (SR-I)To-be-discussed
33 400KV-GHANAPUR-RAMAGUNDAM-3 09-09-2018/03:23:00 TRIPPED ON B-N FAULT PGCIL (SR-I)/ NTPCTo-be-discussed
34 HVDC 500KV KOLAR_DC Pole 09-09-2018/07:45:00 09-09-2018/13:23:00TRIPPED ON BUCCHOLZ
RELAY OPERATIONPGCIL (SR-II)
To-be-discussed
35 400KV-VIJAYAWADA-NELLORE_AP-2 11-09-2018/15:26:00 11-09-2018/17:46:00TRIPPED DUE TO B-N LINE
FAULTPGCIL (SR-I)/ APTRANSCO
To-be-discussed
36 400KV-SURYAPET-JULURUPADU-2 11-09-2018/14:46:00 11-09-2018/15:46:00 TRIPPED ON R-N FAULT TSTRANSCO To-be-discussed
37 400KV-SURYAPET-JULURUPADU-2 11-09-2018/09:24:00 11-09-2018/11:10:00DT Received at SURYAPET
EndTSTRANSCO
To-be-discussed
38 400KV-SURYAPET-JULURUPADU-1 11-09-2018/09:23:00 C-N fault TSTRANSCO To-be-discussed
39 400KV-BHOOPALAPALLY-GAJWEL-2 11-09-2018/12:51:00 11-09-2018/15:18:00 TRIPPED ON R-N FAULT TSGENCO/ TSTRANSCO
TSGENCO: Line tripped on B-N fault , AR
operation attempted successfully but
line tripped on persistant fault on B-N.
40 400KV-KALPAKKA-KHAMMAM-1 11-09-2018/13:25:00 11-09-2018/22:24:00 TRIPPED ON Y-N FAULT APTRANSCO/ PGCIL(SR-I) To-be-discussed
41 400KV-SURYAPET-JULURUPADU-2 11-09-2018/14:46:00 11-09-2018/15:46:00 TRIPPED ON R-N FAULT TSTRANSCO To-be-discussed
42 220KV-AMBEWADI-XELDEM 11-09-2018/18:47:00 11-09-2018/22:15:00H/T DUE TO ARCING IN
BREAKER @ AMBEVADIKPTCL/GED
To-be-discussed
43 220KV-AMBEWADI-XELDEM 11-09-2018/17:15:00 11-09-2018/17:48:00 TRIPPED ON LA PROBLEM KPTCL/ GEDTo-be-discussed
44 220KV-AMBEWADI-XELDEM 11-09-2018/12:34:00 11-09-2018/17:10:00 DISTANCE PROTECTION KPTCL/ GED To-be-discussed
45 400KV-BHOOPALAPALLY-GAJWEL-1 11-09-2018/12:51:00 11-09-2018/16:22:00 TRIPPED ON R-N FAULT TSGENCO/ TSTRANSCO
TSGENCO: Line tripped on R-N fault , AR
operation attempted successfully but
line tripped on persistant fault on R-N.
TSTRANSCO:
46 400KV/220KV ICT-1 URAVUKONDA 12-09-2018/07:22:00 12-09-2018/14:04:00TRIPPED ON BUCCHOLZ
RELAY OPERATIONAPTRANSCO
To-be-discussed
47 400KV-KARAIKUDI-KAYATHAR-2 12-09-2018/16:39:00 DT RECEIVED PGCIL (SR-II)/ TANTRANSCOTo-be-discussed
48 400KV-SURYAPET-JULURUPADU-2 12-09-2018/11:33:00 12-09-2018/21:34:00 TRIPPED ON R-N FAULT TSTRANSCO To-be-discussed
49400KV-SRISAILAM_LEFT_BANK-
SATTENPALLI-213-09-2018/12:29:00 TRIPPED DUE TO R-N FAULT TSGENCO/ APTRANSCO
To-be-discussed
Annexure-III
Page 4 of 7
50 400KV-BIDADI-TUMKUR-2 13-09-2018/14:24:00 13-09-2018/14:45:00 TRIPPED ON R-N FAULT PGCIL (SR-II) To-be-discussed
51 400KV-HOSUR-SALEM-2 13-09-2018/14:21:00 TRIPPED ON R-N FAULT PGCIL (SR-II) To-be-discussed
52 400KV-NAGAPATTNAM_PS-TRICHY-2 13-09-2018/21:52:00 TRIPPED ON B-N FAULT PGCIL (SR-II)To-be-discussed
53 400KV-NEYVELI_TS_II-PUGALUR-1 13-09-2018/20:53:00 13-09-2018/21:06:00 TRIPPED ON R-N FAULT NLCIL/ PGCIL (SR-II) To-be-discussed
54 400KV-KALVENDAPATTU-PUGALUR-2 14-09-2018/02:40:00 TRIPPED ON Y-N FAULT PGCIL (SR-II)To-be-discussed
55 400KV-KALVENDAPATTU-PUGALUR-1 14-09-2018/12:40:00 14-09-2018/15:55:00 TRIPPED ON B-N FAULT PGCIL (SR-II)To-be-discussed
56 400KV-BHOOPALAPALLY-GAJWEL-1 14-09-2018/11:20:00 14-09-2018/16:39:00 TRIPPED ON R-N FAULT TSGENCO/ TSTRANSCO
TSGENCO: Line tripped on R-N fault , AR
operation attempted successfully but
line tripped on persistant fault on R-N.
TSTRANSCO:
57 400KV-BHOOPALAPALLY-GAJWEL-2 14-09-2018/14:17:00 14-09-2018/17:16:00 DISTANCE PROTECTION TSGENCO/ TSTRANSCO
TSGENCO: Line tripped on B-N fault , AR
operation attempted successfully but
line tripped on persistant fault on B-N.
TSTRANSCO:
58 400KV-MAMIDAPALLI-KHAMMAM-1 15-09-2018/17:10:00 15-09-2018/23:12:00 TRIPPED ON R-N FAULT TSTRANSCO/ PGCIL (SR-I)To-be-discussed
59 220KV-AMBEWADI-XELDEM 15-09-2018/12:42:00 15-09-2018/12:56:00 TRIPPED ON B-N FAULT KPTCL/ GED To-be-discussed
60 400KV-CHITTOOR-KALIKIRI-1 15-09-2018/22:17:00 16-09-2018/01:36:00 TRIPPED ON R-N FAULT APTRANSCO To-be-discussed
61 400KV-BHOOPALAPALLY-GAJWEL-1 15-09-2018/09:51:00 15-09-2018/17:23:00 TRIPPED ON R-N FAULT TSGENCO/ TSTRANSCO
TSGENCO: Line tripped on R-N fault , AR
operation attempted successfully but
line tripped on persistant fault on R-N.
TSTRANSCO:
62 400KV-GOOTY-NPS-1 15-09-2018/13:51:00 15-09-2018/15:03:00 TRIPPED ON R-N FAULT PGCIL (SR-I) To-be-discussed
63 220KV-KADAKOLA-KANIYAMPETTA 16-09-2018/03:55:00 TRIPPED ON R-N FAULT KPTCL/ KSEBLTo-be-discussed
64400KV-NELLORE_PG-SRIPERUMBADUR-
116-09-2018/00:41:00 TRIPPED DUE TO R-N FAULT PGCIL (SR-I)/ PGCIL (SR-II)
To-be-discussed
65 220KV-AMBEWADI-PONDA-1 17-09-2018/14:39:00 17-09-2018/15:55:00220KV bus failure at
Ambewadi S/sKPTCL/ GED
To-be-discussed
66 220KV-AMBEWADI-PONDA-2 17-09-2018/14:39:00 17-09-2018/17:19:00220KV bus failure at
Ambewadi S/sKPTCL/ GED
To-be-discussed
67 400KV-ALAMATHY-THIRUVALAM-1 17-09-2018/23:36:00 TRIPPED ON R-N FAULT TANTRANSCO To-be-discussed
68 400KV-UPCL-HASSAN-2 18-09-2018/21:15:00 TRIPPED ON R-N FAULT UPCL/ PGCIL (SR-II) To-be-discussed
Annexure-III
Page 5 of 7
69 400KV/220KV ICT-1 URAVUKONDA 19-09-2018/08:47:00 19-09-2018/14:14:00TRIPPED ON BUCCHOLZ
RELAY OPERATIONAPTRANSCO
To-be-discussed
70 400KV-ALAMATHY-THIRUVALAM-1 19-09-2018/01:16:00 TRIPPED ON R-N FAULT TANTRANSCO To-be-discussed
71 400KV/220KV GUTTUR-ICT-1 20-09-2018/18:18:00 20-09-2018/20:05:00DIFFERENTIAL PROTECTION
ACTEDKPTCL
To-be-discussed
72
400KV-CUDDAPAH-
NAGARJUNASAGAR_PG-1 FSC@
CUDDAPAH
21-09-2018/16:44:00 21-09-2018/18:23:00 LINE TRIPPED PGCIL(SR-I)
To-be-discussed
73 400KV-MARADAM-KALPAKKA-1 24-09-2018/19:55:00 DT RECEIVED APTRANSCO To-be-discussed
74 400KV-MUNIRABAD-GUTTUR-1 24-09-2018/09:44:00 24-09-2018/12:28:00 MALOPERATED PGCIL(SR-I)/ KPTCL To-be-discussed
75 400KV-SURYAPET-JULURUPADU-1 25-09-2018/11:44:00 25-09-2018/12:26:00 TRIPPED ON R-N FAULT TSTRANSCO To-be-discussed
76 400KV-TALGUPPA-HASSAN-1 25-09-2018/05:37:00 TRIPPED ON R-N FAULT KPTCL/ PGCIL(SR-II) To-be-discussed
77 400KV-MEDARAM-RAMADUGU-2 25-09-2018/12:15:00 25-09-2018/12:41:00 MAL-OPERATION TSTRANSCO To-be-discussed
78 400KV-SURYAPET-JULURUPADU-2 25-09-2018/11:44:00 TRIPPED ON R-N FAULT TSTRANSCO To-be-discussed
79 400KV-SURYAPET-JULURUPADU-1 25-09-2018/11:44:00 25-09-2018/13:52:00 SOTF OPERATED TSTRANSCO To-be-discussed
80 400KV-KALPAKKA-ASUPAKA-1 25-09-2018/12:20:00 25-09-2018/16:20:00TRIPPED DUE TO B-N LINE
FAULTAPTRANSCO/ TSTRANSCO
To-be-discussed
81 400KV-KALPAKKA-ASUPAKA-1 25-09-2018/11:19:00 25-09-2018/12:12:00TRIPPED DUE TO B-N LINE
FAULTAPTRANSCO/ TSTRANSCO
To-be-discussed
82 400KV-MARADAM-KALPAKKA-2 25-09-2018/16:46:00 25-09-2018/16:49:00 TRIPPED ON R-N FAULT APTRANSCO To-be-discussed
83 400KV-VEMAGIRI_AP-SATTENPALLY-1 25-09-2018/14:10:00 25-09-2018/20:28:00 TRIPPED ON B-N FAULT APTRANSCOTo-be-discussed
84 400KV-NELAMANGALA-HIRIYUR-1 26-09-2018/00:27:00 TRIPPED ON Y-N FAULT KPTCL/ PGCIL (SR-II) To-be-discussed
85 220KV-AMBEWADI-PONDA-1 26-09-2018/14:43:00 26-09-2018/15:39:00TRIPPED DUE TO B-N LINE
FAULTKPTCL
To-be-discussed
86 220KV-JURALA-RAICHUR_KA-1 26-09-2018/13:51:00 26-09-2018/18:51:00 TRIPPED ON R-N FAULT TSGENCO/ KPTCL To-be-discussed
87 220KV-AMBEWADI-PONDA-1 27-09-2018/16:27:00 27-09-2018/17:16:00TRIPPED DUE TO B-N LINE
FAULTKPTCL
To-be-discussed
88 400KV-NELAMANGALA-HIRIYUR-1 27-09-2018/14:18:00 27-09-2018/18:25:00 TRIPPED ON LA BLAST KPTCL/ PGCIL (SR-II) To-be-discussed
89 400KV-MAMIDAPALLI-DINDI-1 29-09-2018/16:00:00 29-09-2018/17:22:00 RELAY MALOPERATION TSTRANSCO To-be-discussed
90 400KV-GUTTUR-JINDAL-1 29-09-2018/11:30:00 29-09-2018/16:31:00 TRIPPED ON R-N FAULT KPTCL/ JSW To-be-discussed
91 220KV-AMBEWADI-PONDA-2 29-09-2018/15:13:00 TRIPPED ON R-N FAULT KPTCL To-be-discussed
92 400KV/110KV RASIPALYAM-ICT-1 29-09-2018/22:57:00 30-09-2018/00:24:00EARTH FAULT RELAY
OPERATEDTANTRANSCO
To-be-discussed
93 400KV/110KV RASIPALYAM-ICT-2 29-09-2018/22:57:00 30-09-2018/00:30:00EARTH FAULT RELAY
OPERATEDTANTRANSCO
To-be-discussed
94 400KV-MAMIDAPALLI-DINDI-1 30-09-2018/11:26:00 RELAY MALOPERATION TSTRANSCO To-be-discussed
95400KV-URAVAKONDA-
MEHBOOBNAGAR-230-09-2018/18:42:00 30-09-2018/19:52:00 DISTANCE PROTECTION APTRANSCO/ TSTRANSCO
To-be-discussed
96 400KV-MAMIDAPALLI-KHAMMAM-1 30-09-2018/17:26:00 30-09-2018/17:57:00 DT RECEIVED TSTRANSCO/ PGCIL (SR-I)To-be-discussed
97 220KV-AMBEWADI-PONDA-2 30-09-2018/12:00:00 TRIPPED ON B-N FAULT KPTCL To-be-discussed
98 400KV-PAVAGADA-BPS-2 01-10-2018/05:28:00 Y-N FAULT PGCIL (SR-I)/ KPTCL To-be-discussed
Annexure-III
Page 6 of 7
99 400KV-BPS-YTPS-1 01-10-2018/05:28:00 Reason awaited KPTCL/ KPCL To-be-discussed
100 220KV-UDUMALPET_TN-IDDUKKI-1 01-10-2018/04:00:00BUS BAR PROTECTION
OPERATEDTANTRANSCO/ KSEB
To-be-discussed
101 400/220kV GHANI ICT-2 03-10-2018/11:19:00 03-10-2018/11:34:00 MALOPERATION APTRANSCO To-be-discussed
102 220KV-AMBEWADI-XELDEM 04-10-2018/23:24:00 TRIPPED ON Y-N FAULT KPTCL To-be-discussed
103 220KV-AMBEWADI-PONDA-2 04-10-2018/12:43:00 04-10-2018/15:50:00 TRIPPED ON B-N FAULT KPTCL To-be-discussed
104 400KV-VTPS_IV-SURYAPET-1 04-10-2018/11:43:00 TRIPPED ON B-N FAULT APGENCO/ TSTRANSCO To-be-discussed
105 400KV/220KV VEMAGIRI_AP-ICT-3 04-10-2018/11:32:00 04-10-2018/11:37:00Tripped at LV side due to
DC LeakageAPTRANSCO
To-be-discussed
106 220KV-SULURPET-GUMMIDIPOONDI-1 05-10-2018/00:45:00230 KV BUS BAR
PROTECTION OPERATEDAPTRANSCO/ TNEB
To-be-discussed
107 400KV-TALGUPPA-HASSAN-1 05-10-2018/17:21:00 TRIPPED ON R-N FAULT KPTCL/ PGCIL (SR-II) To-be-discussed
108 765KV-KURNOOL_PG-NPS-2 05-10-2018/13:54:00Tripped due to PRV Relay
operatedPGCIL (SR-I)
To-be-discussed
109 400KV/220KV GUTTUR-ICT-1 05-10-2018/14:01:00 05-10-2018/18:31:00EMERGENCY
MAINTENANCEKPTCL
To-be-discussed
110 400KV-KOCHI-TRICHUR-2 05-10-2018/18:00:00 05-10-2018/20:52:00 phase to phase fault PGCIL (SR-II) To-be-discussed
111220KV-CHITTOOR_AP-
THIRUVALAM_TN-105-10-2018/14:34:00 05-10-2018/19:52:00
BUS BAR PROTECTION
OPERATEDAPTRANSCO/ TANTRANSCO
To-be-discussed
112 400KV-KOCHI-TRICHUR-1 05-10-2018/18:00:00 05-10-2018/20:54:00 phase to phase fault PGCIL (SR-II) To-be-discussed
113 400KV-MEPL-NPS-1 06-10-2018/00:05:00 DT received at NPS MEPL/ PGCIL (SR-I) To-be-discussed
114 400KV-MEPL-NPS-1 06-10-2018/11:33:00 06-10-2018/15:48:00DT RECEIVED FROM MEPL
ENDMEPL/ PGCIL (SR-I)
To-be-discussed
115 400KV-SATTENPALLY-PODILI-1 06-10-2018/15:00:00 H/T AFTER TEST CHARGING APTRANSCOTo-be-discussed
116 400KV-SATTENPALLY-PODILI-2 06-10-2018/15:01:00 H/T AFTER TEST CHARGING APTRANSCOTo-be-discussed
117 220KV-AMBEWADI-XELDEM 07-10-2018/13:57:00 07-10-2018/15:41:00 TRIPPED ON B-N FAULT KPTCL To-be-discussed
118 400KV-VIJAYAWADA-VEMAGIRI_PG-1 07-10-2018/12:23:00 07-10-2018/13:21:00TRIPPED DUE TO B-N LINE
FAULTPGCIL (SR-I)
To-be-discussed
119 400KV-HINDUJA-KV_KOTA-1 08-10-2018/10:40:00 08-10-2018/13:19:00 TRIPPED ON B-N FAULT HNPCL/ APTRANSCO To-be-discussed
120400KV-GOOTY-SOMANAHALLI-1 FSC@
GOOTY08-10-2018/01:34:00 PROTECTION 1 LOCKOUT PGCIL (SR-I)/ PGCIL (SR-II)
To-be-discussed
121 220KV-AMBEWADI-PONDA-2 08-10-2018/23:48:00TRIPPED ON DISTANCE
PROTECTIONKPTCL
To-be-discussed
122400KV-NARNOOR-
SRISAILAM_LEFT_BANK-108-10-2018/21:40:00 08-10-2018/22:54:00 DT RECEIVED AT SRISAILAM APTRANSCO/ TSGENCO
To-be-discussed
Annexure-III
Page 7 of 7
220KV Nidadavolu - Vijjeaswaram-1 (Distance) -ABB- REL100
220KV Nidadavolu - Vijjeaswaram-1(LBB) - ABB- RACIA
220KV Nidadavolu - GVK (Distance) -ABB- REL100
220KV Nidadavolu - GVK (LBB) - ABB- RACIA
220KV Nidadavolu - Pallantla-1 (M1) - ALSTOM - EPAC3000
220KV Nidadavolu - Pallantla-1 (M2) - ALSTOM - PD521
220KV Nidadavolu - Pallantla-2 (M1) - ALSTOM - EPAC3000
220KV Nidadavolu - Pallantla-2 (M2) - ALSTOM - PD521
132KV Nidadavolu - Nallajerla (Distance) - ALSTOM - PD521
132KV Nidadavolu - Jeypore Sugars (Distance) - GE- D60
132KV Nidadavolu - Jeypore Sugars (Backup) - GE- F650
132KV Nidadavolu - Saggonda-2 (Distance) -ALSTOM - EPAC3000
132KV Nidadavolu - Saggonda-1 (Distance) -SIFANG - CSC162
132KV Nidadavolu - Saggonda-1 (Backup) -ER - MIT121
132KV Nidadavolu - Kovvuru (Distance) -SIEMENS - 7SA510
220/132kV PTR-2 LBB- ABB -RAICA
220/132kV PTR-3 -DIFF- ABB -RET316*4
220/132kV PTR-3 - Backup - ARGUS-2
2 BOMMURU Auto Trf-2 NCT Name plate details 132kV BOMMURU-RVK (BACKUP) - GE-F650 - SW NA
3 RAMPACHODACARAM 220kV BOMMURU LINE LBB-ABB-RAICA
4 UNDI 220 & 132 kV Line & Transformer Settings to be send through mail.
220/132kV PTR-1 (DIFF) - ABB-RET316*4
220KV Bhimadole - Vijjeaswaram (LBB) - ABB- RACIA
220KV Bhimadole - Nunna (LBB) - ABB- RACIA
132kV Bhimadole-Pedavegi(Distance) - SEL311C
132kV K.V.KOTA - CHINTALAPUDI-2 (Distance)- Sifang CSC162
132kV K.V.KOTA - CHINTALAPUDI-2 (Bakup)- Sifang CSC211
132kV K.V.KOTA - CHINTALAPUDI-1 (Bakup)- GE-F650
132kV K.V.KOTA - Bhimadole (Bakup)- GE-F650
132kV K.V.KOTA - Tie-1(Line Diff)- Alstom- KBCH120
132kV K.V.KOTA - Tie-1(Bakup)- GE-F650
132kV K.V.KOTA - Tie-2 (Bakup)- GE-F650
400kV GVK-1 (O/V) - AREVA - Micom-P923
400kV GVK-2 (O/V) - AREVA - Micom-P923
132kV PEDDAPURAM LINE (BACKUP ) -SIFANG -CSC211
220kV BUSBAR - ABB-RADSS
220kV BOMMURU LINE LBB-ABB-RAICA
220kV SPECTRUM LINE-2 LBB-ABB-RAICA
220kV SPECTRUM LINE-1 LBB-ALSTOM-EPAC3000
220kV SPECTRUM LINE-1 LBB-ALSTOM-PD521
33kV G.MAMIDADA LINE -SIEMENS- 7SR1102 (require .csv format)
33kV THIMMAPURAM LINE -SIEMENS- 7SR1102 (require .csv format)
160MVA PTR-3 -DIFF-SIEMENS -7SR242(require .csv format)
160MVA PTR-3 -REF-SIEMENS -7SR2303(require .csv format)
160MVA PTR-3-HV -O/C AND E/F-SIEMENS -7SR1206(require .csv format)
Pending PMS Data of AP Stations (Substations & Pooling Stations) as on 12.10.2018
Remarks
APTRANSCO
Contact Details of Station
Personnel
Postal Address (in case of Privately
owned Plants like Wind PS/ Solar
PS)
Sl.
No.Station Name Pending General Data Details Pending Relay Settings Data Details
Vijay Kumar - 9440811193
A.Gurubabu - 9440810925
5 BHIMADOLE -
-NIDADAVOLU1
-KAMAVARAPUKOTA -220kV6
-VEMAGIRI-APTRANSCO7
A.Gurubabu - 9440810925
-KAKINADA9
8 SAMALKOTA -
Annexure-IV
Page 1 of 17
160MVA PTR-3 -LV-O/C AND E/F-SIEMENS -7SR1206(require .csv format)
80MVA PTR2-DIFF-SIEMENS-7SR242(require .csv format)
80MVA PTR2-HV OC EF-SIEMENS-7SR2202(require .csv format)
80MVA PTR2-LV OC EF-SIEMENS-7SR1206(require .csv format)
80MVAPTR2-OVER FLUX SIEMENS 7RW8010(require .csv format)
50MVA PTR-1-HV OC AND EF SIFANG -CSC211(require .TXT format)
50MVA PTR-1-LV OC AND EF SIFANG -CSC211(require .TXT format)
BUS SECTIONALIZER-OC &EF ALSTOM C264(REQUIRE .CSV FORMAT)
T/F-1HV-OC &EF ALSTOM C264(REQUIRE .CSV FORMAT)
T/F-2HV-OC &EF ALSTOM C264(REQUIRE .CSV FORMAT)
220/132kV ICT-2 HV & LV-BACKUP -GE_F650HARD COPY SETTINGS ONLY GIVEN
DUE TO NON COMMUNICABLE.
33kV ANANTHAPUR-BACKUP_SIFANG_CSC211
33kV GOOTY ROAD-BACKUP_SIFANG_CSC211
220kV ANANTHAPUR-DISTANCE_GE_LPSIMAGE COPY OF SETTINGS GIVEN DUE
TO NON COMMUNICABLE
132kV RAYADURGA-2BACKUP_GE_F650
33kV KCT WIND FARM-BACKUP_SCHIENDER_MICOM_P127
33kV BLYTH-1&2-BACKUP_SCHIENDE_MICOM_P127
220/132kV PTR-2 DIFF RELAY DETIAL AND SETTINGS REPLACEMENT IS GOING ON
132kV KOMALI-BACKUP -GE_F650
132kV GERDAU STEELS-BACKUP_AREVA_MICOM_P127
14 GOOTY (RSS) 220kV GOOTY(SWS)-DISTANCE_GE_LPSHARD COPY SETTINGS ONLY GIVEN
DUE TO NON COMMUNICABLE.
220kV SHAPURAM-DISTANCE_SIEMENS_7SA522
220kV KIA MOTORS-DISTANCE_ALSTOM_MICOM-P444
220kV ULTRATECH-DISTANCE_ALSTOM_MICOM-P444
220kV B.R.PALLI-DISTANCE_GE_LPS
220kV DHONE-2-DISTANCE_REYROLLE_OHMEGA
220/132kV PTR-BACKUP_GE-F650
132/33kV PTR-1&2 - HV &LV-BACKUP_GE-F650
33kV ALL FEEDERS-BACKUP_GE-F650
18 MANUBOLU-400kV 220/132kV PTR-1&2 (DIFF) - SIFANG-CSC326C.V.Joshi - 9440817620
HARD COPY SETTINGS ONLY GIVEN
DUE TO NON COMMUNICABLE.
19 NELLORE-220kV 220kV MANUBOLU-3-DISTANCE_GE_LPS
C.S.S. Anjaneya Prasad -
9440811167([email protected]
m)
HARD COPY SETTINGS ONLY GIVEN
DUE TO NON COMMUNICABLE.
10 RAMAVARAM -
HARD COPY SETTINGS ONLY GIVEN
DUE TO NON COMMUNICABLE.
HAND WRITTEN SETTINGS GIVEN DUE
TO NON COMMUNICABLE
SUBRAYANPALLI15
HARD COPY SETTINGS ONLY GIVEN
DUE TO NON COMMUNICABLE.
13 TADIPADRI
A.Gurubabu - 9440810925
-KAKINADA9
11 ANANTHAPUR
GOOTY (SWS)16
HARD COPY SETTINGS ONLY GIVEN
DUE TO NON COMMUNICABLE.
Venugopal - 9491030762
([email protected])BOKSAMPALLI17
Srinivas - 9440811151
HARD COPY SETTINGS ONLY GIVEN
DUE TO NON COMMUNICABLE.
THEY WILL SEND LATER
KALYAN DURGA12
Annexure-IV
Page 2 of 17
220/132kV PTR-3-HV &LV-BACKUP_GE-F650
132kV GREENPLY-DISTANCE_SIFANG-CSC162
33kV SHAR & VARADA STEEL-BACKUP-SIFANG_CSC211
220KV SOMAYAJULAPALLY-2-DISTANCE-SIEMENS-7SA52
220KV BUS BAR-DIFFERENTIAL_ALSTOM-P741
220/132KV PTR-1-DIFFERENTIAL_ABB_RET670
220/132KV PTR-1 - HV &LV-BACKUP_ABB-REF615
220/132KV PTR-1 - HV-df/dt_BACKUP_ABB-REF615
220/132KV PTR-1 - HV-REF&O/F_BACKUP_ABB-RET650
220/132KV PTR-2-DIFFERENTIAL_GE_T60
220/132KV PTR-2 - HV &LV-BACKUP_O/F_GE_T60
220/132KV PTR-2 - HV &LV-BACKUP_GE_F650
220/132KV PTR-2- LV-U/F_BACKUP_ABB-RET650
220KV-BUS COUPLER-BACK UP_O/C&E/F_ALSTOM_P14DB
132KV-ALLAGADA-2-DISTANCE_GE_D60
132KV-ALLAGADA-2-BACKUP-O/C&E/F_GE_F650
132KV-VEMULAGUDA-DISTANCE_GE_D60
132KV-VEMULAGUDA-BACKUP-O/C&E/F_GE_F650
132KV-BANAGANAPALLY-DISTANCE_ALSTOM_P442
132KV-BANAGANAPALLY-BACKUP-O/C&E/F_ALSTOM_P14DB
132/33kV PTR-1 - DIFFERENTIAL_SIFANG_CSC326
132/33KV PTR-1 - HV &LV-BACKUP_SIFANG_O/C&E/F_CSC211
132/33KV PTR-1 - HV-BACKUP_O/F_CSC211
132/33kV PTR-2 - DIFFERENTIAL_ALSTOM_KBCH
132/33KV PTR-2 - HV &LV-BACKUP_ALSTOM_O/C&E/F_P126
132/33KV PTR-2 - LV-BACKUP-FREQ&U/V_ALSTOM_CSC211
132/33kV PTR-3 - DIFFERENTIAL_SIEMENS_DUOBIAS
132/33KV PTR-3- HV &LV-BACKUP_SIEMENS_O/C&E/F_ARGUS
132/33KV PTR-3 - LV-BACKUP-U/F&U/_VSIEMENS_7SJ8031
132/33KV PTR-3 - HV-BACKUP-O/F_SIEMENS_7RW8010
33KV-RIGMAIN-BACKUP_O/C&E/F-ER_CSC211
33KV-NANDAVARAM-BACKUP_O/C&E/F-ER_CSC211
33KV-GAJULAPALLI-BACKUP_O/C&E/F-ER_CSC211
33KV-NANDYALA-BACKUP_O/C&E/F-ER_CSC211
33KV-PANYAM-BACKUP_O/C&E/F-ER_CSC211
33KV-GADIVEMULA-BACKUP_O/C&E/F-ER_CSC211
33KV-MAHANANDI-BACKUP_O/C&E/F-AVANA_NPA422
33KV-DEEBAGUNTALA-BACKUP_O/C&E/F-AVANA_NPA422
33KV-BANNI ATMAKOTKURU-BACKUP_O/C&E/F-G_81RV
33KV-GOSPADU-BACKUP_O/C&E/F-G_81RV
33KV-CAPACITOR BANK-1-BACK UP-O/C&E/F-ALSTOM_P14DB
33KV-CAPACITOR BANK-1-BACK UP-PF DISPLAY_ALSTOM_P241
33KV-CAPACITOR BANK-1-BACK UP-UNDER BALANCE_ALSTOM_P14NB
33KV-CAPACITOR BANK-2-BACK UP-O/C&E/F-ALSTOM_P14DB
33KV-CAPACITOR BANK-2-BACK UP-PF DISPLAY_ALSTOM_P241
33KV-CAPACITOR BANK-2-BACK UP-UNDER BALANCE_ALSTOM_P14NB
NANDYALA21 UPDATED SINGLE LINE DIAGRAM
20HARD COPY SETTINGS ONLY GIVEN
DUE TO NON COMMUNICABLE.
C.S.S. Anjaneya Prasad -
9440811167([email protected]
m)
SULURPETA
RELAYS ARE NOT
COMMUNICATING,THEY WILL SEND
LATER
RAJENDRA BABU PRASAD
ph:9440811137 mail
Annexure-IV
Page 3 of 17
220KV-KAMBALAPADU-MAIN-2_DISTANCE_AREVA_P437
220KV-KRISHNAGIRI-MAIN-2_DISTANCE_AREVA_P437
220KV-GOOTY-1-MAIN-2_DISTANCE_AREVA_P437
220KV-GOOTY-2-MAIN-2_DISTANCE_AREVA_P437
220KV-SOMAYAJULAPALLY-1-MAIN-2_DISTANCE_AREVA_P437
220KV-KSOMAYAJULAPALLY-2-MAIN-2_DISTANCE_AREVA_P437
220KV-BUS COUPLER-BACK UP_O/C&E/F_AREVA_P141
220KV-BUS BAR-MAIN_DIFFERENTIAL_AREVA_P741
220KV-GHANI-1-MAIN-2_DISTANCE_SIEMENS_7SA52
220KV-GHANI-2-MAIN-2_DISTANCE_SIEMENS_7SA52
220KV-DHONE-2-MAIN-1_DISTANCE_ABB_REL670
220KV-BUS BAR-MAIN_DIFFERENTIAL_ALSTOM_P741
220KV MALYALA MAIN-1-DISTANCE_NR_PCS902
220/11KV-PTR-1&2&3-MAIN-DIFFERENTIAL_NR_PCS978
220/11KV-PTR-1&2&3-BACKUP HV&LV-O/C&E/F_NR_PCS9611
220/11KV-PTR-1&2&3-BACKUP LV-REF&O/F_ALSTO_P642
220KV-MOLAGAVALLI-MAIN-2_DISTANCE_ABB_REL670
220KV-MYTRA WIND 1&2-MAIN-2_DISTANCE_ABB_REL670
407BAY-MAHESWARAM-BACKUP_LBB_ER_20ABT
408BAY-63MVA REACTOR-MAIN-TEED2 DIFF_SCHNEIDER_P645
410BAY-GOOTY-BACKUP_LBB_ER_20ABT
413 ORVAKAL-1-BACKUP_LBB_ALSTOM_P444
416 ORVAKAL-2-BACKUP_LBB_ALSTOM_P444
419BAY-JAMMALAMADUR-1&2-BACKUP_LBB_SIEMENS_7VK61
207 SOMAYAJUNAPALLY-MAIN-2-DISTANCE_ABB_REL670
400KV BUS BAR-MAIN-DIFF_SIEMENS_7SS85
220KV NARNOOR-1-MAIN1-DISTANCE_SEL_310C
132KV NANDIKOTKURU-MAIN_DISTANCE_SEL_311C
132KV NANDIKOTKURU-BACKUP_O/C&E/F_ER_ARGUS-2
132KV YMGR-BACKUP_O/C&E/F_GE_F650
220/132KV PTR-3-MAIN-DIFF_ALSTOM_KBCH
220/132KV PTR-4-MAIN-DIFF_GE_T60(require .csv format)
220/132KV PTR-4-BACKUP HV&LV-O/C_GE_MIF11(require .csv format)
220/132KV PTR-4-BACKUP HV&LV-E/F_GE_MINNA(require .csv format)
132/33KV-PTR-1-BACKUP-U/F&U/V-ALSTOM_P942
132/33KV-PTR-1-BACKUP HV&LV-O/C&E/F-ALSTOM_P126
29 NARASARAOPET 132KV CPT-1-MAIN-DISTANCE_ALSTOM_PD521P.VARAPRASAD PH:9491058550
[email protected] COMMUNICATING
30 TALLAPALLY SWS 220KV MAIN-2-VTPS-DISTANCE_GE_LPSDB11
RAJENDRA BABU PRASAD
ph:9440811137 mail
RELAYS ARE NOT COMMUNICATING
TADIKONDA
NANSURALLA25
24 MUCHUMARI UPDATED SINGLE LINE DIAGRAM
220KV SOMAYAJULAPALLY23
400KV NARNOOR(KURNOOL)26
27 AP CARBIDES
28
DHONE SWS22
RELAYS ARE NOT
COMMUNICATING,THEY WILL SEND
LATER
RELAYS ARE NOT COMMUNICATING
,THEY SEND WILL LATER
RAJENDRA BABU PRASAD
ph:9440811137 mail
RAJENDRA BABU PRASAD
ph:9440811137 mail
RECEIVED STG FILE DUE TO NOT YET
DOWNLOADING REQUIRED FORMAT
BUT WE REQUIRED .CSV FILE
NAGABHUSHANAM 9440810961
M.SAM PRAKASH PH:9440811176
RECEIVED HARD COPY,THEY WILL
SEND BY BEFORE 28 SEP 2018
RELAYS ARE NOT COMMUNICATING
RAJENDRA BABU PRASAD
ph:9440811137 mail
Annexure-IV
Page 4 of 17
209BAY TRANSFOR BUS COUPLER-BACKUP_OC&E/F_SCHNEIDER_C264
208BAY BUS COUPLER-BACKUP_OC&E/F_SCHNEIDER_P141
206 NARASARAOPET 1&2-MAIN-1_DISTANCE_SCHNEIDER_P444
206 NARASARAOPET 1&2-BACKUP_LBB_SCHNEIDER_P743
206 POCHARAM 1&2-MAIN-1_DISTANCE_SCHNEIDER_P444
206 POCHARAM 1&2-BACKUP_LBB_SCHNEIDER_P743
220/33kV TRF-1 DIFFERERNTIAL ALSTOM-KBCH (RECEIVED IMAGE FORAT)
220/33kV TRF-1 DIFFERERNTIAL ALSTOM-KBCH (RECEIVED IMAGE FORAT)
LINE LENGTH DETAILSOF 220kV & 132kV
LINES132kV GOVINDARAJA LINE -DISTANCE-SIFANG-CSC162
33kV WELSPUN SOLAR LINE - BACKUP - AREVA - P127
220kV BUSBAR - DIFFERENTIAL - AREVA - P743
34 NAGARI CAPACITOR BANK NAME PLATE DETAILM.BALA SARAVANAN - 9490154220
ICT-1&2 25 MVA TRF LV SIDE CT DETAILS
BUS COUPLER CT CONNECTED RATIO
METERING BAY CT CONNECTED RATIO
LINE LENGTH & CONDUTOR TYPE
DETAILSOF 220kV LINES
ALL FEEDERS & TRF CT CONNECTED RATIO
132 & 33kV FEEDERS ADOPTED CT RATIO
220/132/11kV ALL TRF % IMPEDANCE
VALUE
38 MYDUKAR 220kV SRISAILAM LINE - DISTANCE-ABB-REL511
220kV THIMMAPURAM LINE - DISTANCE-GE-LPS
220kV RAJAMPETA LINE - DISTANCE-GE-LPS
160MVA TRF-2 HV BACKUP-ABB-REF615
160MVA TRF-2 HV OVERFLUX-ABB-RET670
160MVA TRF-2 LV OVERFLUX-ABB-RET650
132kV RAYACHOTY LINE1 - DISTANCE-ABB-REL650
132kV RAYACHOTY LINE1 - BACKUP-ABB-REF615
40 PORUMAMILA 132kV VINIRAMMA-2 LINE LENGTH 220kV BUSCOUPLER-BACKUP - GE-F650
220 & 132kV LINE AND TRF ADOPETED CT
RATIO
220 & 132kV LINE LENGTH AND
CONDUCTOR DETIALS
33kV CAPACITOR BANK FEEDER CT
42 THIMMAPURAM_CHITTOR220/132kV FEEDER & LINE CT ADOPTED
RATIO
C. Sreeramachandra Murthy -
9440811131
K. Vikram -
9491045414([email protected])
SATTENAPALLI31
KODURU32
KALIKERI_220kV41
CHINAKAMPALLI39
K.SRINIVASH
8333994034
MAIL ID:[email protected]
THEY WILL SEND LATER
ICT-1 100MVA TRF HV SIDE ADOPTED
RATIO AND CT NAME PLATE RATIO IS
MISMATCH
PULIVENDULA33
C. Sreeramachandra Murthy -
9440811131
THIMMAPURAM_KADAPA35 220kV BUSCOUPLER -BACKUP -ABB-REF615
CHAKRAYAPETA36
YERAGUNTALA37
Annexure-IV
Page 5 of 17
100MVA TRF-2 -OVERFLUX-ABB-REF615
33kV VATTALUR-BACKUP-EASUN REYROLLE-MIT114
33kV AKEPADU-BACKUP-EASUN REYROLLE-MIT114
33kV RAJAMPET-BACKUP-EASUN REYROLLE-MIT114
33kV REDDYPALLI-BACKUP-EASUN REYROLLE-MIT114
33kV TALAPAKA-BACKUP-EASUN REYROLLE-MIT114
33kV BRAHMANAPALLI-BACKUP-EASUN REYROLLE-MIT114
33kV C.BANK-1-OVERVOLTAGE-EASUN REYROLLE-MVT181
33kV C.BANK-2-OVERVOLTAGE-EASUN REYROLLE-MVT181
220KV RTPP 1- MAIN 1-DISTANCE-NR-PCS902
220KV RTPP 1- MAIN 2-DISTANCE-ALSTOM-P444
220KV RTPP 2- MAIN 1-DISTANCE-NR-PCS902
220KV RTPP 2- MAIN 2-DISTANCE-ALSTOM-P444
220KV CHITTOR 1- MAIN 1-DISTANCE-NR-PCS902
220KV CHITTOR 1- MAIN 2-DISTANCE-ALSTOM-P444
220KV CHITTOR 2- MAIN 1-DISTANCE-NR-PCS902
220KV CHITTOR 2- MAIN 2-DISTANCE-ALSTOM-P444
315MVA ICT2 HV- DIFFERENTIAL-NR-PCS978
315MVA ICT2 HV- OC& EF-NR-PCS9611
315MVA ICT2 LV- REF-ALSTOM-P643
315MVA ICT2 LV- OC& EF-NR-PCS9611
132kV G.NORTON LINE -DISTANCE -SIFANG -CSC162 (OTHER FORMAT)
132kV G.NORTON LINE -BACKUP -SIFANG -CSC211(OTHER FORMAT)
132kV PUTTUR-1 LINE -DISTANCE -SIFANG -CSC162 (OTHER FORMAT)
132kV PUTTUR-1 LINE -BACKUP -SIFANG -CSC211(OTHER FORMAT)
132kV AMARAJA LINE -BACKUP -EASUN REYROLLE - ARGUS-2
132kV PUTTUR-2 LINE -BACKUP -EASUN REYROLLE - ARGUS-2
31.5MVA TRF DIFFERENTIAL - REYROLLE-DUOBIAS-M
31.5MVA TRF HV BACKUP -EASUN REYROLLE- ARGUS-2
31.5MVA TRF LV BACKUP -EASUN REYROLLE- ARGUS-1
16MVA TRF DIFFERENTIAL - REYROLLE-DUOBIAS-M
16MVA TRF HV BACKUP -EASUN REYROLLE- MIT113 & MIT131
16MVA TRF LV BACKUP -EASUN REYROLLE- MIT114
220KV ICT-1 LV (O/C &E/F)-SIFANG-CSC-211
220KV ICT-2 (DIFF)-GE-T60
220KV ICT-2 HV (O/C & E/F)-GE-F650
220KV ICT-2 (UNDER FREQUENCY)-GE-F650
132KV ICT-3 (DIFF)-ABB-RET650
132KV ICT-3 HV (O/C & E/F)-ABB-RET615
132KV ICT-3 HV (OVERFLUX)-ABB-RET650
132KV ICT-3 HV (UNDER FREQUENCY)-ABB-RET615
132KV ICT-3 LV (O/C & E/F)-ABB-RET615
33KV PAYAKAPURAM-(O/C & E/F)-SIFANG-CSC-211
44 KALIKERI 400KV400kV LINE AND ICT 2 HV&LV ADOPETED CT
RATIO
D.V Krishna Kumar - 9440811140
K. Vikram -
9491045414([email protected])
RAJEMPETA43
C. Sreeramachandra Murthy -
9440811131
A.Sambasiva Rao - 9440811162
([email protected])Communication problem
RENIGUNTA45
46 NUNNA
Annexure-IV
Page 6 of 17
220KV BUS COUPLER-(O/C & E/F)-ABB-REC670
220KV ICT HV (O/C & E/F)-ABB-REC670
220KV ICT LV (O/C & E/F)-GE-F650
220KV SURYAPET-MAIN-1 (DISTANCE)-SEL-311C
220KV SURYAPET-MAIN-2 (DISTANCE)-ER-OMEGA
220KV NARKETPALLI-MAIN-1 (DISTANCE)-SEL-311C
220KV NARKETPALLI-MAIN-2 (DISTANCE)-ER-OMEGA
220KV ICT-3-(DIFF)-ER-DUOBIAS-M
220KV BUS BAR-(DIFF)-AREVA-P741
132KV ICT-1 (DIFF)-SIFANG-CSC-326
132KV ICT-1 HV (O/C & E/F)-SIFANG-CSC-211
132KV ICT-1 LV (O/C & E/F)-SIFANG-CSC-211
132KV ICT-1 HV (OVERFLUX)-SIFANG-CSC-211
132KV JAYPEE (DISTANCE)-SIFANG-CSC-162
132KV JAYPEE (O/C & E/F)-SIFANG-CSC-162
132KV KUSUMANCHI-(DISTANCE)-SIEMENS-7SA610
132KV KUSUMANCHI-(O/C & E/F)-SIEMENS-7SJ62
132KV KODAD-(DISTANCE)-SIFANG-CSC-162
132KV KODAD-(O/C & E/F)-SIFANG-CSC-211
132KV RAMAPURAM-(DISTANCE)-SIFANG-CSC-162
132KV RAMAPURAM-(O/C & E/F)-SIFANG-CSC-211
132KV SEETHAPURAM-(DISTANCE)-SIEMENS-7SA610
132KV SEETHAPURAM-(O/C & E/F)-SIEMENS-7SJ62
132KV MCL-(DISTANCE)-SIFANG-CSC-162
132KV MCL-(O/C & E/F)-SIFANG-CSC-211
132KV -NANDIGAMA(DISTANCE)-SIEMENS-7SA610
132KV NANDIGAMA-(O/C & E/F)-SIEMENS-7SJ62
132KV PUTTAPARTHY-(DISTANCE)-GE-D60
132KV PUTTAPARTHY-(O/C & E/F)-GE-F650
33KV HINDUPUR (O/C & E/F)-SIFANG-CSC-211
33KV CHILAMATTUR (O/C & E/F)-SIFANG-CSC-211
33KVCHALAKUR (O/C & E/F)-SIFANG-CSC-211
33KVRODDAM (O/C & E/F)-SIFANG-CSC-211
33KVKOTNUR (O/C & E/F)-SIFANG-CSC-211
33KV SHANTHI CASTING (O/C & E/F)-SIFANG-CSC-211
33KV THUMA KUNTA (O/C & E/F)-SIFANG-CSC-211
220KV CHILLAKALLU-2 (DISTANCE)-SEL-311C
220KV CHILLAKALLU-2 (DISTANCE)-GE-D60
220KV BUS BAR-(DIFF)-SEL-CSC-150
220KV ICT-1 (DIFF)-GE-T60
220KV ICT-1 HV(O/C PROTECTION)-GE-MIF11
220KV ICT-1 HV(E/F PROTECTION)-GE-MIF11
220KV ICT-2 (DIFF)-SIEMENS-7UT5121
220KV ICT-2 (DIFF)-SIEMENS-7UT5121 THEY WILL SEND LATER
220KV ICT-2 HV(OVERFLUX PROTECTION)-SIEMENS-7RW6000
220KV ICT-2 LV(O/C PROTECTION)-SIEMENS-7SJ6001
132KV NAZIVEEDU-(DISTANCE)-SIEMENS-7SA610
132KV NAZIVEEDU-(O/C & E/F)-SIEMENS-7SJ62
132KV RAILWAY-1(O/C & E/F)-SIFANG-CSC-211
132KV RAILWAY-2(O/C & E/F)-SIFANG-CSC-211
132KV ICT-1 (df/dt)-ALSTOM-P942
33KV NCL (O/C & E/F)-CGL-81RV
33KV JAKKAPUDI (O/C & E/F)-CGL-81RX
51 ONGOLE 220KV ICT-1 (HV & LV OVERFLUX)-ERL-DUOBIAS-M K.Srinivas - 9491045401 COMMUNICATION PROBLEM
220KV BUS BAR-(DIFF)-SIFANG-CSC-162
132KV MARTURU-1 (DISTANCE)-SIFANG-CSC-101
132KV MARTURU-1 (O/C & E/F)-SIFANG-CSC-211
52 PARCHURE.RAJENDRA PRASAD PH:7382296893
EMAIL ID: [email protected] PROBLEM
49 HINDUPUR
D.V Krishna Kumar -
9440811140([email protected]
om)
Communication problem
50 KONDAPALLIA.Sambasiva Rao - 9440811162
Srinivas mohan
PH:9490154301([email protected]
om)
Communication problem
48 CHILLAKALLUA.Sambasiva Rao -
9440811162([email protected])THEY WILL SEND LATER
47 BORAMPALLI
Annexure-IV
Page 7 of 17
132KV MARTURU-2 (DISTANCE)-SIFANG-CSC-101
132KV MARTURU-2 (O/C & E/F)-SIFANG-CSC-211
132KV CHARLA-1(DISTANCE)-SIFANG-CSC-101
132KV CHARLA-1(DISTANCE)-SIFANG-CSC-211
132KV CHARLA-2 (DISTANCE)-SIFANG-CSC-101
132KV GUNTUR (O/C & E/F)-ABB-REF615
132KV INKOOLU (O/C & E/F)-ABB-REF615
33KV ADUSUMHALLI (O/C & E/F)-SIFANG-CSC-211
33KV PARCHUR (O/C & E/F)-SIFANG-CSC-211
33KV YADDANAPALLI (O/C & E/F)-SIFANG-CSC-211
220KV NARASARAOPETA (DISTANCE)-MAIN-1-GE-D60
220KV VTPS (DISTANCE)-MAIN-1-GE-D60
220KV BUS BAR (DIFF)-SIFANG-CSC-150
220KV ICT-1 (DIFF)-ABB-RET670
220KV ICT-1 HV (O/C & E/F)-ABB-REF615
220KV ICT-1 HV (REF)-ABB-REF615
220KV ICT-1 HV (df/dt)-ABB-REF615
220KV ICT-1 LV (O/C & E/F)-ABB-REF615
220KV ICT-2 (DIFF)-ER-CSC326
220KV ICT-2 HV (O/C & E/F)-ER-CSC211
220KV ICT-2 HV (V/F)-ER-CSC211
220KV ICT-2 HV (UNDER FREQUENCY)-ER-CSC211
220KV ICT-2 LV (O/C & E/F)-ER-CSC211
220KV ICT-2 LV (V/F)-ER-CSC211
132KV MEDARMATLA (DISTANCE)-SIFANG-CSC-162
132KV MEDARMATLA (O/C & E/F)-SIFANG-CSC-162
132KV KANIGIRI (DISTANCE)-SIFANG-CSC-162
132KV KANIGIRI (O/C & E/F)-SIFANG-CSC-211
132KV LANGASAMUDRAM(DISTANCE)-SIFANG-CSC-162
132KV LANGASAMUDRAM (O/C & E/F)-SIFANG-CSC-211
132KV DARSI (DISTANCE)-SIFANG-CSC-162
132KV DARSI (O/C & E/F)-SIFANG-CSC-211
132KV ICT-2(DIFF)-GE-T60
33KV SLYALANDRA (O/C & E/F) -SIFANG-CSC-211
220KV SUZLON (DISTANCE)-MAIN-1 GE-D60
220KV BUS COUPLER (O/C & E/F)-GE-F650
220KV PTR HV (O/C & E/F)-GE-F650
220KV PTR LV (O/C & E/F)-GE-F650
220KV PTR HV (REF)-GE-T60
B.V Ramana Murthy - 9440810960
54 VAJRAKARUR COMMUNICATION PROBLEM
52 PARCHURE.RAJENDRA PRASAD PH:7382296893
EMAIL ID: [email protected] PROBLEM
53 PUDILIK.Srinivas - 9491045401
([email protected]) COMMUNICATION PROBLEM
Annexure-IV
Page 8 of 17
220KV ICT-1 HV (DIFF)-NR-ELECTRIC-PCS 978
220KV ICT-1 HV (O/C & E/F)-NR-ELECTRIC-PCS 9611
220KV ICT-1 LV (O/C & E/F)-NR-ELECTRIC-PCS 9611
220KV ICT-1 HV & LV (OVERFLUX)-NR-ELECTRIC-PCS 9611
220KV ICT-2 HV (DIFF)-NR-ELECTRIC-PCS 978
220KV ICT-2 HV (O/C & E/F)-NR-ELECTRIC-PCS 9611
220KV ICT-2 LV (O/C & E/F)-NR-ELECTRIC-PCS 9611
220KV ICT-2 HV & LV (OVERFLUX)-NR-ELECTRIC-PCS 9611
132KV TUMKUNTA (O/C & E/F)-NR-ELECTRIC-PCS9611
132KV LEPAKSHI (O/C & E/F)-NR-ELECTRIC-PCS9611
132KV ICT-1 HV (O/C & E/F)-NR-ELECTRIC-PCS 9611
132KV ICT-1 LV (O/C & E/F)-NR-ELECTRIC-PCS 9611
132KV ICT-2(DIFF)-NR-ELECTRIC-PCS978
132KV ICT-2 HV (O/C & E/F)-NR-ELECTRIC-PCS 9611
132KV ICT-2 LV (O/C & E/F)-NR-ELECTRIC-PCS 9611
33KV MEGA STEEL-1 (O/C & E/F)-NR-ELECTRIC-PCS9611
33KV MEGA STEEL-2(O/C & E/F)-NR-ELECTRIC-PCS9611
33KV HINDUPUR STEEL(O/C & E/F)-NR-ELECTRIC-PCS9611
NP KUNTA PGCIL-1 MAIN-1(DISTANCE)-ABB-RED670
NP KUNTA PGCIL-1 MAIN-2(DISTANCE)-SCHNEIDER-P546
NP KUNTA PGCIL-2 MAIN-1(DISTANCE)-ABB-RED670
NP KUNTA PGCIL-2 MAIN-2(DISTANCE)-SCHNEIDER-P546
BUS COUPLER (O/C & E/F)-SCHNEIDER-C264
BUS BAR (DIFF)-SCHNEIDER-P741
ICT1-1 (DIFF)-SCHNEIDER-P643
ICT1-1 HV (O/C & E/F)-SCHNEIDER-C264
ICT1-1 LV (O/C & E/F)-SCHNEIDER-C264
ICT1-2 (DIFF)-SCHNEIDER-P643
ICT1-2 HV (O/C & E/F)-SCHNEIDER-C264
ICT1-2 LV (O/C & E/F)-SCHNEIDER-C264
ICT1-3 (DIFF)-SCHNEIDER-P643
ICT1-3 HV (O/C & E/F)-SCHNEIDER-C264
ICT1-3 LV (O/C & E/F)-SCHNEIDER-C264
TATA-1A (O/C & E/F)-SCHNEIDER-C264
TATA-1B (O/C & E/F)-SCHNEIDER-C264
TATA-2A (O/C & E/F)-SCHNEIDER-C264
TATA-2B (O/C & E/F)-SCHNEIDER-C264
LANCO-3A (O/C & E/F)-SCHNEIDER-C264
LANCO-3B (O/C & E/F)-SCHNEIDER-C264
BHEL-4A (O/C & E/F)-SCHNEIDER-C264
BHEL-4B (O/C & E/F)-SCHNEIDER-C264
S&W-5A (O/C & E/F)-SCHNEIDER-C264
S&W-5B (O/C & E/F)-SCHNEIDER-C264
33KV BUS COUPLER -1(O/C & E/F)-SCHNEIDER-C264
33KV BUS COUPLER -2(O/C & E/F)-SCHNEIDER-C264
33KV BUS COUPLER -3(O/C & E/F)-SCHNEIDER-C264
33KV AUX TRANSFORMER-1 (O/C E/F)-SCHNEIDER-C264
33KV AUX TRANSFORMER-2 (O/C E/F)-SCHNEIDER-C264
B.V Ramana Murthy - 9440810960
56 NP KUNTA SSRELAY SOFTWARE NOT AVAILABLE
AND THEY WILL IT LATER
55 GOLLAPURAM COMMUNICATION PROBLEM
Annexure-IV
Page 9 of 17
220KV PTR-1 (DIFF) ER-DUOBIAS-M
220KV PTR-2 LV (O/C)-GE-MIF11
220KV PTR-2 LV (E/F)-GE-M-FAMILY
132KV PTR-1 (DIFF) ER-DUOBIAS-M
132KV PTR-2 (DIFF) ER-DUOBIAS-M
220KV BUS BAR (DIFF)-ALSTOM-PBLSB
220KV NUNNA-1 (DISTANCE)-ABB-REL511
132KV PARMARRU-1 (DISTANCE)-ALSTOM-PD521
132KV PARMARRU-2 (DISTANCE)-ALSTOM-PD521
132KV -KANUMOLU-1 (DISTANCE)-ALSTOM-PD521
132KV -KANUMOLU-2 (DISTANCE)-ALSTOM-PD521
132KV -CHIGURKOTA (O/C & E/F)-ALSTOM-P14D
132KV -RAILWAY-1 (O/C & E/F)-ALSTOM-P14D
132KV -RAILWAY-2 (O/C & E/F)-ALSTOM-P14D
220KV PTR-2 LV (E/F)-GE-M-FAMILY
220KV PTR-3 (DIFF) ER-DUOBIAS-M
220KV PTR-3 LV (O/C & E/F) SIFANG-CSC-211
132KV PTR-1 (DIFF) ER-DUOBIAS-M
132KV PTR-2 HV (O/C & E/F) ALSTOM-P126
132KV PTR-2 HV (U/F & U/V ) ALSTOM-P942
132KV PTR-2 LV (O/C & E/F) ALSTOM-P121
132KV PTR-3 HV (U/F & U/V ) ALSTOM-P942
132KV PTR-3 LV (O/C & E/F) ALSTOM-P121
220KV BUS BAR (DIFF) AREVA-P741
220KV NUNNA-1 (DISTANCE)-ABB-REL511
220KV NUNNA-2 (DISTANCE)-ABB-REL511
132KV AUTONAGAR-1 (DISTANCE)-SCHNEIDER-P442
132KV AUTONAGAR-2 (DISTANCE)-SEL-311C
33KV SLDC BACKUP-1 (O/C & E/F) CGL-81RV
33KV SLDC BACKUP-2 (O/C & E/F) CGL-81RV
132KV CUMBUM-2(DISTANCE)-SCHNEIDER-P442
132KV CUMBUM-2(O/C & E/F)-SCHNEIDER-P141
220KV PTR-1 HV (O/C & E/F)-SIFANG-CSC-211
220KV PTR-2 (DIFF)-ABB-RET316*4
220KV PTR-3 (DIFF)-SIFANG-CSC-326
220KV PTR-3 HV (O/C & E/F )-SIFANG-CSC-211
220KV PTR-3 LV (O/C & E/F )-SIFANG-CSC-211
220KV PTR-3 HV (OVERFLUX )-SIFANG-CSC-211
220KV PTR-3 LV (OVERFLUX)-SIFANG-CSC-211
220KV PTR-3 LV (U/V)-SIFANG-CSC-211
132KV PTR-2(DIFF)-ER-DUOBIAS-M
33KV ACME6A (LINE DIFF)-ABB- RED615
33KV ACME6A (O/C & E/F)-SCHNEIDER- C264
33KV ACME6B (LINE DIFF)-ABB- RED615
33KV ACME6B (O/C & E/F)-SCHNEIDER- C264
33KV BUS COUPLER (O/C & E/F)-SCHNEIDER- C264
A.Sambasiva Rao - 9440811162
60 GALIVEEDU PS-2KRISHNA KISHORE PH: 6300578387
EMAIL ID: [email protected] PROBLEM
58 GUNNADALA COMMUNICATION PROBLEM
59 MARKAPURK.Srinivas - 9491045401
([email protected]) COMMUNICATION PROBLEM
57 GUDIVADA COMMUNICATION PROBLEM
Annexure-IV
Page 10 of 17
33KV TPREL-4A (LINE DIFF)-ABB-RED 615
33KV TPREL-4A (O/C & E/F)-SCHNEIDER-C264
33KV TPREL-4B (LINE DIFF)-ABB-RED 615
33KV TPREL-4B (O/C & E/F)-SCHNEIDER-C264
33KV TPREL-5A (LINE DIFF)-ABB-RED 615
33KV TPREL-5A (O/C & E/F)-SCHNEIDER-C264
33KV TPREL-5B (LINE DIFF)-ABB-RED 615
33KV TPREL-5B (O/C & E/F)-SCHNEIDER-C264
33KV ACME-1A (LINE DIFF)-ABB-RED 615
33KV TACME-1A (O/C & E/F)-SCHNEIDER-C264
33KV ACME-1B (LINE DIFF)-ABB-RED 615
33KV TACME-1B (O/C & E/F)-SCHNEIDER-C264
33KV ACME-1B (LINE DIFF)-ABB-RED 615
33KV ACME-1B (O/C & E/F)-SCHNEIDER-C264
33KV ACME-3A (LINE DIFF)-ABB-RED 615
33KV ACME-3A (O/C & E/F)-SCHNEIDER-C26433KV ACME-3B (LINE DIFF)-ABB-RED 615
33KV ACME-3B (O/C & E/F)-SCHNEIDER-C264
33KV FRV-2A (LINE DIFF)-ABB-RED 615
33KV FRV-2A (O/C & E/F)-SCHNEIDER-C264
33KV BUS COUPLER-1 (O/C & E/F)-SCHNEIDER-C264
33KV BUS COUPLER-2 (O/C & E/F)-SCHNEIDER-C264
33KV BUS COUPLER-3 (O/C & E/F)-SCHNEIDER-C264
220KV GARIVIDI-1&2_ MAIN-2_DISTANCE_GE_LPS-DB
220/132KV PTR-1 HV_DIFFERENTIAL_GE_T60
220/132KV PTR-1 HV_OC_EASUN REYROLLE_MJT314
220/132KV PTR-1 HV_EF_EASUN REYROLLE_MIT131
220/132KV PTR-1 HV_OVERFLUX_EASUN REYROLLE_7RW8010
132KV PALAKONDA_DISTANCE_SEL_311C
132KV PALAKONDA_OC&EF_EASUN REYROLLE_ARGUS2
132KV PATHAPATNAM_OC&EF_GE_F650
132/33KV PTR-1 HV_OVERFLUX_7RW8010_SIEMENS
132/33KV PTR-1 HV_UNDER FREQENCY_7RW8010_SIEMENS
33KV SRIKAKULAM_OC & EF_ADR141A_ASHIDA
33KV PALASA_OC & EF_ADR141A_ASHIDA
33KV PALAKONDA_OC & EF_7SR1102_ASHIDA
33KV PATHAPATNAM_OC & EF_7SR1102_ASHIDA
63 220KV BRANDIX 220KV BUS BAR_ DIFFERENTIAL _ALSTOM_PBLSBEr.Sri.A.Srinivasu Ph.No.9491041192
220KV DAIRY FARM 132/33KV PTR-1 HV_DIFFERENTIAL_7UT512_SIEMENS
132/33KV PTR-2 HV_DIFFERENTIAL_DUOBIAS-M_EASUN REYROLLE
62 220KV TEKKALI
Er. Sri. BMV Subramanyam,
Ph.No.7382933284
61 GALIVEEDU PS-1KRISHNA KISHORE PH: 6300578387
EMAIL ID: [email protected] PROBLEM
Er.Sri.A.Srinivasu Ph.No.9491041192
Annexure-IV
Page 11 of 17
400KV KALPAKA
220KV TIE BAY-BACK UP-ALSTOM_C264
220KV BUS COUPLER-BACK UP-ALSTOM_C264
220/33KV PTR-1-BACK UP HV_O/C&E/F_ALSTOM_C264
220/33KV PTR-1-BACK UP LV_O/C&E/F_GE_C264
33/220 KV-PTR 1&2-BACKUP HV&LV-O/C&E/F_SCHNEIDER_C264
220KV NANSURALLA 1&2-MAIN-2_DISTANCE_SIEMENS_7SA52
220KV BUS COUPLER-BACK UP_SCHNEIDER_C264
765KV ALL CT AND CVT NAME PLATE
DETAILS
NGR NAME PLATE DETAILS
LOAD DETAILS OF FEEDERS AND PTR'S ON
28TH MARCH AT 7PM
ICT-1 LV SIDE CT CONNECTED RATIO 400/220kV ICT-1HV BACKUP -SIEMENS-7SJ62
400/220kV ICT-2HV BACKUP -SIEMENS-7SJ62
400/220kV ICT-2HV OVERFLUX -SIEMENS-7RW600
400/220kV ICT-2 LV SIDE OVERFLUX -SIEMENS-7RW600
400/220kV ICT-2 LV SIDE LBB -SIEMENS-7SV6001
400/220kV ICT-2LV BACKUP -SIEMENS-7SJ62
400kV CHITTOR LINE MAIN-1 DISTANCE - SCHNEIDER-P444
400kV NPKUNTA LINE MAIN-1 DISTANCE - EPAC3000-ALSTOM(RECIVED PROJECT
FILE)
70 VISAKAHAPATNAM_HVDC HVDC DATA SHEET HAS TO BE PROVIDED K.SRIHARI - 9437962185,8309893968
400kV BUS REACTOR CT CONNECTED RATIO
BUS REACTOR-3 NAMEPLATE DETAILS &
BUSING CT DETAILS. BUS
REACTOR-3 CB DETAILS. BUS
REACTOR-3 CT DETAILS. TRANSFORMER-
1&2 IMPEDANCE DETAILS.
Er.Sri. V. Koteswara Rao
Ph.No.9491041192
65
FIXED SERIES COMPENSATION-1&2
CAPCITOR BANK DETAILS
M.MALLIKARJUNA - 9490690301
REGEN O&M SERVICE PVT LTD
GAMESHA RENEWABLE PVT LTD
VIKRAVEL - 7995573235
M/s GAMESA Renewable Private Limited., 220
KV Pooling Station at MOLAGAVALLI], Semcorp
Green Infra Ltd, 5th floor, tower c, building
no.8, DLF cyber city, guragon-1220002,
765KV KURNOOL PGCIL68
PGCIL
RAVISHANKAR DY.MANAGER
8333924869
RAJAVEL M 9952300364
GAMESHA RENEWABLE PVT
LTD 67
REGEN O&M SERVICE PVT LTD
WIND66 THEY WILL SEND LATER
REGEN POWERTECH Pvt Ltd,Survey no-
756,devanakonda,kurnool,AP
KADAPA69
NAGARJUN SAGAR-2 LINE REACTOR NGR
DETAILS
Annexure-IV
Page 12 of 17
400kV Vemagiri-1&2 -ABB-SPAF140C
400kV Vemagiri-1&2 -ABB-SPAU 130C
Based on the data provided it can be concluded that
Static excitation system ALSTOM - GME6 623 101 is used
inSTG. The time constants and Gains are not known has
to be provided.
Based on the data provided it can be concluded that
Static excitation system GE EX2100 is used in GTG. The
time constants and Gains are not known has to be
provided.
3GMR Barge Mounted -
5*52.17MW
GTG Generator data parameters are partially received.
Following generator parameters are pending - Aramature
Resistance Ra-
Saturated reactances- Xq,Xq',Xq'', Xp,
Open circuit time constants - T'qo, T''qo, Continuous I2 current
in %,I22*t constant
B.Prabhakaran - 9959616420
4 GVK GAUTAMI-469 MW - -
Based on the data provided it can be concluded that
ABB AC160 model is used in GTG . The Transfer function
block diagram,time constants and Gains are not known
has to be provided.
PV RAVI RAM - 9866074676
([email protected])GVK Gautami power ltd,Peddapuram,samalkot,E.G.Dist,AP-533440
5 JEGURUPADU -2 228 MW
STG & GTG data parameters are partially received. Following
generator parameters are pending -
Saturated reactances- Xn,
Inertia constant H,Continuous I2 current in %,I22*t
constant,NGR
-
Based on the data provided it can be concluded that
Alstom make . The Transfer function block diagram,time
constants and Gains are not known has to be provided.
The Transfer function block diagram,time constants and
Gains are not known has to be provided.
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
Y.Ramakrishna -
8466998101(ramakrishna.y@gvk.
com)
GVK industries Ltd, Jergupadu-phase -2,Kadiyam Mandalam,East
godaveri Dt, AP -533126
STG Protection SLD, STG data sheet has to be provided
Generator data parameters are partially received. Following
generator parameters are pending -
Saturated reactances- Xq,Xq',Xq'', Xp,
Open circuit time constants - T'do,Tqo, T'qo, Continuous I2
current in %,I22*t constant
7Spectrum Power Generation
Pvt Ltd - 3-*56+1*75 MW
Protection SLD of Steam & Gas Genrator has to be provided;
Adopted ratio of Generator;Generator data parameters are
partially received. Following generator parameters are pending
-Armature resistance-Ra,
Saturated reactances- Xq,Xq',Xq'', Xp,
Open circuit time constants - ,Tqo, T'qo, Generator Interia
Constant
220kV Busbar Settings,
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented
Based on the data provided it can be concluded that
Static excitation system is used. The time constants and
Gains are not known has to be provided.
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
B.VEERABABU - 8977532246
Spectrum Power GenerationLtd , beach road, near uppada, kakinada,AP-
533448
8Vijeswaram- stage-1 - 98 MW
stage-2 - 185 MWGenerator data sheet has to be provided for stage-1 Stage-1-GTG Gen overall diff-micom-P643
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented
Based on the data provided it can be concluded that GE
EX2100 model GTG & STG model is used. The Transfer
Function Block diagram time constants and Gains are
not know
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
A.Srinivas Rao - 8897173337
9SUZLON GOLBAL
SERVICE(URAVUGONDA)WIND TURBINE & GENERATOR DATA SHEET HAS TO PROVIDE ALL SETTINGS HAS TO SEND WITH PROPER FORMAT
MURUGASEH -
7995015949;Kuppu swamy-
7995015976
10 ELLUTLA SUZLON WIND TURBINE & GENERATOR DATA SHEET HAS TO PROVIDE
HARIKRISHNA-
9494986402(hari.marasimhulu@
suzlon.com)
220KV URAVAKONDA-1 MAIN-1 (DISTANCE)-ALSTOM-P444
220KV URAVAKONDA-1 MAIN-2 (DISTANCE)-GE-D60
220KV URAVAKONDA-2 MAIN-1 (DISTANCE)-ALSTOM-P444
220KV URAVAKONDA-2 MAIN-2 (DISTANCE)-GE-D60
220KV BUS COUPLER (O/C & E/F)-ALSTOM-P14D
220KV ICT-1 (DIFF)-ALSTOM-P643
220KV ICT-1 HV (STANDBY E/F)-ALSTOM-P14D
220KV ICT-1 HV (O/C & E/F)-ALSTOM-P14D
220KV ICT-1 HV (REF)-ALSTOM-P14D
220KV ICT-1 LV (O/C & E/F)-ALSTOM-P14D
220KV ICT-1 LV (REF)-ALSTOM-P14D
220KV ICT-2 (DIFF)-ALSTOM-P643
220KV ICT-2 HV (STANDBY E/F)-ALSTOM-P14D
220KV ICT-2 HV (O/C & E/F)-ALSTOM-P14D
220KV ICT-2 HV (REF)-ALSTOM-P14D
220KV ICT-2 LV (O/C & E/F)-ALSTOM-P14D
220KV ICT-2 LV (REF)-ALSTOM-P14D
220KV ICT-3 (DIFF)-ALSTOM-P643
220KV ICT-3 HV (STANDBY E/F)-ALSTOM-P14D
220KV ICT-3 HV (O/C & E/F)-ALSTOM-P14D
220KV ICT-3 HV (REF)-ALSTOM-P14D
220KV ICT-3 LV (O/C & E/F)-ALSTOM-P14D
220KV ICT-3 LV (REF)-ALSTOM-P14D
13 WIND WORLD (SHAPURAM) WIND TURBINE & GENERATOR DATA SHEET HAS TO PROVIDE ALL SETTINGS HAS TO SEND WITH PROPER FORMAT
SATHESH KUMAR-9121015898
(sateeshkumar.puthani@windwo
rldindia.com)
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented
GMR VEMAGIRI POWER GENERATION LTD,vemagiri village,kadiam
Mandal,E.G.Dist,AP-533125
M.S.V.SUBRAHMANYAM -
8332970813
Godavari Gas Power Plant,jegurupadu,near rajahmundry,kadiam
mandal,E.G.Dist,AP-533126
11
SUZLON POWER
INFRASTRUCTURE(BELUGUPPA
)
Murugesh .M-
7995015949(m.murugesh@suzlo
n.com)
WIND TURBINE , GENERATOR DATA SHEET & GENERATOR
TRANSFORMER NAME PLATE DETAIL HAS TO PROVIDE
BV.Madhusudhan - 9949996690
m)
-
2
1
APGPCL
GVK
Godavari Gas Power Plant
Spectrum Power GenerationLtd
Godaveri GPP - 216 MW6
GMR-PHASE-2 -
2*239.52+2*144.199 MW
Based on the data provided it can be concluded that GE
EX2100 model(GTG) & Alstom ALSPA TGC320(STG)
model is used. The Block diagram, time constants and
Gains are not know
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented
- -
GMR-PHASE-1 -
1*230+1*156.1535 MW
STG Generator data parameters are partially received.
Following generator parameters are pending -
Saturated reactances- Xq,Xq',Xq'', Xp,
Open circuit time constants - T'qo, T''qo, Continuous I2 current
in %,I22*t constant
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented
Sl.
No.
GMR ENERGY LTD
Pending PMS Data of AP State (Generating Stations) as on 12.10.2018
Pending Relay Settings Data Details PSS Model Pending DataPostal Address (in case of Privately owned Plants like
Wind PS/ Solar PS)
Contact Details of Station
Personnel Station Name Governor Model Pending Data AVR Model Pending DataPending General Data Details
Based on the data provided it can be concluded that
Rotating type AC excitation system ABB UNITROL-M
series is used. The time constants and Gains are not
known has to be provided.
SUZLON GLOBAL SERVICES
WIND WORLD INDIA LTD
12 SUZLON WIND FARMS 220KV BUS TIE (O/C & E/F)-ALSTOM-P14D
MAN0J KUMAR-9014978497
(nojkumar.maddamashetty@suzl
on.com)
COMMUNICATION PROBLEMSLD,WIND TURBINE , GENERATOR DATA SHEET & GENERATOR
TRANSFORMER NAME PLATE DETAIL HAS TO PROVIDE
Annexure-IV
Page 13 of 17
14 SDSTPS_NELLORE -2*800MW Generator data sheet has to be provided
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented
Srinivasalu-9493120147
GENERATOR-1 (OVERALL DIFF)-AREVA-P343
UAT-1,2 (LV SIDE) CT RATIO, BURDEN, ACCURECY CLASS, VK
KNEE POINT,MAGNETIZATION CURRENT
16MEL-NELLORE- 2*135+2*300
MW
Generator data parameters are partially received. Following
generator parameters are pending -
Saturated reactances- Xq,Xq',Xq'',
Open circuit time constants -T''qo, Generator interia
Constant(H)
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented
AVR Transfer block function, time & gain constant values
has to be proivded
A.seshagiri rao-9966708282
(seshagiri.anantharapu@meenak
shienergy.com)
Meenakshi Energy Ltd
Thaminapatnam, Chilakur(Mandalam)
SPSR Nellore, Andhra Pradesh-524003, India
17SEPL_NELLORE - 2*135+2*150
MW
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented
AVR Transfer block function, time & gain constant values
has to be proivded
PSS Transfer block function, time & gain constant
values has to be proivded
D.Narendra Reddy-9676404472
/9848281108
SIMHAPURI ENERGY LIMITED 4 X 150MW Coastal Thermal Power
Plant, Site Office,Tamminapatnam (V), Chillakur (M),SPSR NELLORE –
524412 (AP), India
18SGPL_NELLORE - 2*660
MWThe gains and time constants has to be provided
AVR Transfer block function, time & gain constant values
has to be proivded-
Ramesh-7032967438
pyanampuram/nelaturu Village,Muthukur
mandal,Krishnapattinam,nellore.
19 SEIL(TPCL) - 2*660 MW
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented
AVR Transfer block function, time & gain constant values
has to be proivded-
JOJIBABU-8179780450
)
pyanampuram/nelaturu Village,Muthukur
mandal,Krishnapattinam,nellore.
20NAGARJUN SAGAR RCPH -
3*30.6 MW
Generator data parameters are partially received. Following
generator parameters are pending -
Saturated reactances- Xd,Xp ,Open circuit time constants -
T'qo, T''qo, Continuous I2 current in %,I22*t
constant,Generator interia Constant(H)
ALL SETTINGS HAS TO SEND WITH PROPER FORMAT
Based on the data provided it can be concluded that
ASEA FRVA model is used . The Transfer function block
diagram,time constants and Gains are not known has to
be provided.
Based on the data provided it can be concluded that
static excitation system . The Transfer function block
diagram,time constants and Gains are not known has to
be provided..
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
Y.Sreenivasa - 9490644910
([email protected],in)
21NAGARJUN SAGAR TAIL POND-
2*28 MW
Generator data parameters are partially received. Following
generator parameters are pending -
Saturated reactances- Xp,
Open circuit time constants - T'qo, Continuous I2 current in
%,I22*t constant.
SAT CT Adopted Ration has to be provided.
ALL SETTINGS HAS TO SEND WITH PROPER FORMAT
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented
Excitation system transfer function diagram
implemented in the station. The type of AVR (Ex: DC
Exciter, Static Exciter, AC Exciter etc.,), the gains and
time constants implemented in the system are to be
provided. AVR data sheet is required.
PSS is disabled Venkatrama reddy - 9493181612
22 SRISAILAM RBPH - 7*110 MW
Generator data parameters are partially received. Following
generator parameters are pending -
Armature resistance Ra, Saturated reactances- Xq',Xq'',
Xn(Unit-1&2),Xp(Unit-1,2,5&6),
Open circuit time constants - T''do,T'qo, T''qo
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented
Excitation system transfer function diagram
implemented in the station. The type of AVR (Ex: DC
Exciter, Static Exciter, AC Exciter etc.,), the gains and
time constants implemented in the system are to be
provided. AVR data sheet is required.
D.VENKATA RAMANA RAO
PH.NO:9491049480
23 NTTPS - 6*210+1*500 MW
Generator data parameters are partially received. Following
generator parameters are pending -
Armature resistance Ra(Unit-3&4), Saturated reactances-
Xq,Xq',Xq'', Xp,Xn,Xo,
Open circuit time constants - T''do,T'qo, T''qo
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented
Excitation system transfer function diagram
implemented in the station. The type of AVR (Ex: DC
Exciter, Static Exciter, AC Exciter etc.,), the gains and
time constants implemented in the system are to be
provided. AVR data sheet is required. (except-stage-
1&4)
IVL KOTESWAR RAO -
9440907622
GENERATOR- BACKUP OC & EF_REF615_ABB
132KV- LOWER SILERU_MAIN 1_P442_ALSTOM
132KV- LOWER SILERU_MAIN 2_P437_ALSTOM
132KV- UPPER SILERU_MAIN 1_P442_ALSTOM
132KV- UPPER SILERU_MAIN 2_P437_ALSTOM
40MVA PTR-2 HV_DIFFERENTIAL_CSC326_SIFANG
40MVA PTR-2 HV_OC & EF_CSC211_SIFANG
40MVA PTR-2 HV_OVERFLUX_CSC211_SIFANG
40MVA PTR-2 HV_OVER FREQUENCY_CSC211_SIFANG
40MVA PTR-2 LV_OC & EF_CSC211_SIFANG
132KV GUNTHKAL_MAIN_DISTANCE_CSC162_SIFANG
132KV GUNTHKAL_BACKUP_OC & EF_CSC211_SIFANG
GENERATOR 1,2,3&4 UNITS _ DIFFERENTIAL_P343_AREVA
GENERATOR 1,2,3&4 UNITS _ ROTOR EARTH FAULT_MX3IPG2A_AREVA
40MVA PTR-1 HV_DIFFERENTIAL_MIB202_EASUN REYROLLE
40MVA PTR-1 HV_OC & EF_MIT114_EASUN REYROLLE
40MVA PTR-1 HV_DIR EF_MIT131_EASUN REYROLLE
40MVA PTR-1 HV_OVER FLUXING_MBT191_EASUN REYROLLE
40MVA PTR-1 LV_OC & EF_EF_MIT114_EASUN REYROLLE
40MVA PTR-1 LV_UNDER VOLTAGE_MVT181_EASUN REYROLLE
220KV BOMMUR_MAIN_DISTANCE_REL670_ABB
220KV KTPS_MAIN_DISTANCE_REL511_ABB
220KV KOTHAGUDEM_MAIN_DISTANCE_REL511_ABB
220KV DONKARAYI_MAIN-1_DISTANCE_P442_ALASTOM
220KV DONKARAYI_MAIN-2_DISTANCE_P437_AREVA
GENERATOR-2&4 MAIN-1_DIFFERENTIAL_REG316*4_ABB
GENERATOR-2&4 MAIN-2_DIFFERENTIAL_REG316*4_ABB
GENERATOR-2&4 UAT MAIN_DIFFERENTIAL_RET541_ABB
GENERATOR-1&3 BACKUP_OC & EF _REF615_ABB
GENERATOR-2&4_ROTOR EARTH FAULT_SPAD346C3_ABB
GENERATOR-2&4_STATOR EARTH FAULT_RAGEK_ABB
GENERATOR-1,2_MAIN-1_DIFFERENTIAL_REG670_ABB
GENERATOR-1,2,3,4,5_MAIN-2_DIFFERENTIAL_REG670_ABB
GENERATOR-1&3_OC & EF_REF615_ABB
132KV_VISAKHAPATNAM LINE 1&2_MAIN_DISTANCE_P441_AREVA
132KV_VISAKHAPATNAM LINE 1&2_BACKUP_OC & EF_P127_AREVA
132KV_JAYANAGAR_MAIN_DISTANCE_P442_ALSTOM
132/11KV_BACK FEEDING TRANSFORMER HV_OC&EF_REJ525_ABB
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
J SATYANARAYANA; 9439404909
([email protected])27 MACHKUND PH
Line Conductor Details of Feeders Unit-4,5,6. Unit
4,5&6 NGR data not available. Switch yard SLD should be
provided. Generator Side CT name plate details. Back Feeding
Transformer LV side CT name plate details.
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented.
Excitation system transfer function diagram
implemented in the station. The type of AVR (Ex: DC
Exciter, Static Exciter, AC Exciter etc.,), the gains and
time constants implemented in the system are to be
provided. AVR data sheet is required.
26 LOWER SILERU POWER HOUSE
Generator data parameters are not received. Inertia,
Saturatred Reactances- Xd, Xd', Xd'',Xq,Xq',Xq",Xp. Open
circuit time constants - T'do,Tqo, T'qo. Continuous I2 current
in %,I2^2*t constant. Negative Sequence
Reactance, Zero Sequence Reactance. Capability
&Thermal Curves. Generator NGT rating.
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented.
Based on the data provided it can be concluded that
static excitation system . The Transfer function block
diagram,time constants and Gains are not known has to
be provided..
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
S MAHESH; 9493120705
MOHANA RAO;
9492174317
(seethamohanbhavaraju@gmail.
com)
25 HAMPI PH
Generator data parameters are not received. Inertia,
Saturatred Reactances- Xd, Xd', Xd'',Xq,Xq',Xq",Xp. Open
circuit time constants - T'do,Tqo, T'qo. Continuous I2 current
in %,I2^2*t constant. Negative Sequence
Reactance, Zero Sequence Reactance. Capability
&Thermal Curves Generator NGR rating. Protection
SLD of Generator, GT & UAT. Complete SLD of
Power House. GCB
name plate details.
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented.
AVR Transfer block function, time & gain constant values
has to be proivded
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
SRINIVASULU REDDY;
9449868602(de_hph@rediffmail.
com; [email protected])
24 DONKARAYI PH
Generator data parameters are partially received. Following
generator parameters are pending -Saturated reactances-Xd'',
Xp. Open circuit time constants - T'do,Tqo, T'qo. Continuous I2
current in %,I2^2*t constant Capability & Thermal Curves
Genrator and UAT CT name plate details GCB
and NGR name plate details
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented.
Excitation system transfer function diagram
implemented in the station. The type of AVR (Ex: DC
Exciter, Static Exciter, AC Exciter etc.,), the gains and
time constants implemented in the system are to be
provided. AVR data sheet is required.
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
15 PENNA AHOBILAM PH
APGENCO
SIMHAPURI ENERGY LIMITED
SEMBCORP GAYATRI POWER LTD.
SEMBCORP ENERGY INDIA LTD.
APGENCO
MEENAKSHI ENERGY POWER LTD
NGR RESISTANCE VALUE FOR GENERATOR-1,2
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented
AVR Transfer block function, time & gain constant values
has to be proivded
PSS Transfer block function, time & gain constant
values has to be proivded
B.VENUGOPAL-9493123910
([email protected])GENERATOR-2 (OVERALL DIFF)-AREVA-P343Generator data parameters are partially received. Following
generator parameters are pending - Aramature Resistance Ra-
Saturated reactances- Xq,Xq',Xq'', Xp,
Open circuit time constants - T'qo, T''qo,
Annexure-IV
Page 14 of 17
132/11KV_BACK FEEDING TRANSFORMER HV_REF_SPAE010_ABB
132/11KV_BACK FEEDING TRANSFORMER LV_OC&EF_REJ525_ABB
132/11KV_BACK FEEDING TRANSFORMER LV_OVER
FREQUENCY_SPAF140_ABB
11/0.4KV_STATION TRANSFORMER-1&2_OC&EF_REJ525_ABB
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
J SATYANARAYANA; 9439404909
([email protected])27 MACHKUND PH
Line Conductor Details of Feeders Unit-4,5,6. Unit
4,5&6 NGR data not available. Switch yard SLD should be
provided. Generator Side CT name plate details. Back Feeding
Transformer LV side CT name plate details.
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented.
Excitation system transfer function diagram
implemented in the station. The type of AVR (Ex: DC
Exciter, Static Exciter, AC Exciter etc.,), the gains and
time constants implemented in the system are to be
provided. AVR data sheet is required.
Annexure-IV
Page 15 of 17
GENERATOR-1,2,3&4_MAIN_DIFFERENTIAL_P343_AREVA
GENERATOR-1,2,3&4_BACKUP_ROTOR EARTH
FAULT_MX3IPG2A_AREVA
ALL EM & STATIC RELAYS SETTINGS OF GENERATORS
11KV KANDALURU_OC&EF_P141_ALSTOM
11KV PROJECT FEEDER_OC&EF_MC61A-Nx_L&T
11KV PROJECT FEEDER_OC&EF_S&RB_BROWN BOVERI
11KV VAIKUNT GUEST HOUSE FEEDER_OC&EF_S&RB_BROWN BOVERI
11KV MUNIRABAD_OC&EF_S&RB_BROWN BOVERI
220KV BUS BAR_DIFFERENTIAL_REB670_ABB
220KV_MAIN-1_DISTANCE_D60_GE
220KV_MAIN-2_DISTANCE_LPS_GE
30 GAMESA RENEWABLE PVT LTD
WIND TURBINE & GENERATOR DATA SHEET HAS TO
PROVIDED. VIKRAVEL - 7995573235 M/s GAMESA Renewable Private Limited., 220 KV Pooling Station at
MOLAGAVALLI], Semcorp Green Infra Ltd, 5th floor, tower c, building no.8,
DLF cyber city, guragon-1220002, Haryana, India
31Mythra Vayu (Thungabadra)
Pvt. Ltd
LVRT characteristics of invertor details are to be provided.
WIND TURBINE & GENERATOR DATA SHEET HAS TO
PROVIDED.
Anjaneyalu - 950215772
([email protected])M/s Mythra Vayu (Thungabadra) Pvt. Ltd., 220/33 KV SS, Jutur (V),
Pathikonda (M), Kurnool District
32 GHANI 1 & 2 LVRT characteristics of invertor details are to be provided.
Lingeswar - 7997292348
(lingeswararao.m@greenkogroup
.com)
M/s GREEKO WIND PROJECTS, Plot No. 1366, Road No. 45, Jubilee hills,
Hyderabad – 500033
33 GHANI 3 & 4 LVRT characteristics of invertor details are to be provided. SATHISH KUMAR.A-9790192394
34 REGEN POWERTECH Pvt LtD LVRT characteristics of invertor details are to be provided. RAJAVEL.M 9952300364REGEN POWERTECH Pvt Ltd,Survey no-
756,devanakonda,kurnool,AP
220kV - PORUMAMILA -1 LBB & UTORECLOSURE - ALSTOM -C264
220kV - BUS COUPLER LBB ALSTOM -C264
220kV - BUS SECTION BACKUP ALSTOM -C264
220kV - PTR-1&2 BACKUP ALSTOM -C264
220KV ICT-1 (DIFF)-SIEMENS-7UT85
220KV ICT-1 HV (O/C & E/F)-SIEMENS-7SJ85
220KV ICT-1 (DIFF)-SIEMENS-7UT85
220KV ICT-1 HV (O/C & E/F)-SIEMENS-7SJ85
220KV ICT-2 (DIFF)-SIEMENS-7UT85
220KV ICT-2 HV (O/C & E/F)-SIEMENS-7SJ85
220KV ICT-2 (DIFF)-SIEMENS-7UT85
220KV ICT-2 HV (O/C & E/F)-SIEMENS-7SJ85
220KV BUS BAR (DIFF)-SIEMENS-7SS85
220KV BUS TIE (O/C & E/F)-SIEMENS-7SJ85
220KV BUS BAR-(DIFF)-SIEMENS-7SS85
220KV BUS TIE (O/C & E/F)-SIEMENS-7SJ85
220KV BUS COUPLER (O/C & E/F)-SIEMENS-7SJ85
220KV ICT (DIFF) SIEMENS-7UT85
220KV ICT HV (O/C & E/F) SIEMENS-7SJ85
220KV ICT LV (O/C & E/F) SIEMENS-7SJ85
220KV BUS COUPLER (O/C & E/F)-ALSTOM-C264
220KV BUS SECTION & TIE BAY (O/C & E/F)-ALSTOM-C264
220KV BUS BAR-1 (DIFF)-GE-B90
220KV BUS BAR-2 (DIFF)-GE-B90 (RYB)
33KV FEEDER-1 (O/C 7 E/F)-GE-F650
33KV FEEDER-2 (O/C 7 E/F)-GE-F650
33KV FEEDER-3 (O/C 7 E/F)-GE-F650
33KV FEEDER-4 (O/C 7 E/F)-GE-F650
33KV BUS SECTION (O/C 7 E/F)-GE-F650
220KV PTR-1 (HV) (REF) -ALSTOM-P642
220KV PTR-1 (LV) (O/C & E/F) -GE-F650
220KV PTR-2 (HV) (REF) -ALSTOM-P642
220KV PTR-2 (LV) (O/C & E/F) -GE-F650
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
KRISHNAM RAJU; 9493121114
([email protected])29 UPPER SILERU PH
Generator data parameters are not received. Inertia,
Saturatred Reactances- Xd, Xd', Xd'',Xq,Xq',Xq",Xp. Open
circuit time constants - T'do,Tqo, T'qo. Continuous I2 current
in %,I2^2*t constant. Negative Sequence Reactance, Zero
Sequence Reactance.Capability &Thermal Curves.
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented.
Excitation system transfer function diagram
implemented in the station. The type of AVR (Ex: DC
Exciter, Static Exciter, AC Exciter etc.,), the gains and
time constants implemented in the system are to be
provided. AVR data sheet is required.
28 TB DAM POWER HOUSE
Line length & conductor details of feeders. UAT name plate
details. 11kv feeders CT & CB name plate details.Generator
data parameters are not received. Inertia, Saturatred
Reactances- Xd, Xd', Xd'',Xq,Xq',Xq",Xp. Open circuit time
constants - T'do,Tqo, T'qo. Continuous I2 current in %,I2^2*t
constant. Negative Sequence Reactance, Zero Sequence
Reactance.Capability &Thermal Curves. Switchyard SLD &
Protection SLD of power house.
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented.
Excitation system transfer function diagram
implemented in the station. The type of AVR (Ex: DC
Exciter, Static Exciter, AC Exciter etc.,), the gains and
time constants implemented in the system are to be
provided. AVR data sheet is required.
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
RAVI; 9449868601
HELIOS INFRATECH PVT LTD
41 HELIOS INFRATECH WIND
T J SURESH PH:8019810293
SLD,WIND TURBINE , GENERATOR DATA SHEET & GENERATOR
TRANSFORMER NAME PLATE DETAIL HAS TO PROVIDE
GREENKO WIND FARMS
40 GREEKO WIND FARMS
VISHAWANATH.P
PH:9959552277 EMAIL
ID:vishawanath.p@greekogroup.
com
WIND TURBINE , GENERATOR DATA SHEET & GENERATOR
TRANSFORMER NAME PLATE DETAIL HAS TO PROVIDE
AXIS WIND FARMS
39 AXIS WIND FARMSSunil kumar PH: 7995571215
EMAIL ID :[email protected]
SLD,WIND TURBINE , GENERATOR DATA SHEET & GENERATOR
TRANSFORMER NAME PLATE DETAIL HAS TO PROVIDE
HERO WIND FARMS
38 HERO WIND FARMS BUS TIE (O/C & E/F)-ALSTOM-P14D
Rambabu badarala
PH:9000614423, EMAIL ID:
rambabu.badarala@herofuturee
nergie.com
WIND TURBINE , GENERATOR DATA SHEET & GENERATOR
TRANSFORMER NAME PLATE DETAIL HAS TO PROVIDE
LANCO GENERATING STATION
37 LANCO GS
GENERATOR CT NAMEPLATE DATA AND PT NAMEPLATE DATA
LIKE CT RATIO, BURDEN, ACCURECY CLASS, VK KNEE
POINT,MAGNETIZATION CURRENT
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented (STAGE-1 GTG 7 STG) & (STAGE-
2 STG)
AVR Transfer block function, time & gain constant values
has to be proivded (STAGE-1 GTG AND STG) AND (STAGE-
2&3 GTG)
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
APSPDCL
REGEN POWERTECH Pvt Ltd
GAMESA RENEWABLE PVT LTD
Mythra Vayu (Thungabadra) Pvt. Ltd
GREEKO WIND PROJECTS
ECOREN ENERGY IND PVT LTDAverage & Peak loading of the transformer in MW for
220/33kV TRF-1&2;
Generator parameters like
1.Rated voltage,
2.Stator reactance & resisitance in PU on its own MVA rating
ECOREN WIND ENERGY35
kiran - 7337360541,9963045575
m)
ANIMELA WIND POWER PVT LTDGenerator parameters like
1.Rated voltage,
2.Stator reactance & resisitance in PU on its own MVA rating
3. Rotor reactance & resisitance in PU on its own MVA rating.
ANIMELA
WIND_KAMALAPURAM36
B.PRANESH - 9100980289 ;
INDUKUMAR - 9100040504
ANIMELA WIND POWER PVT LTD , ANIMALA (V),VN PALLI
(M),KAMALAPURAM (T) -516321 KADAPA
Annexure-IV
Page 16 of 17
220KV BUS SECTION & TIE BAY (O/C & E/F)-ALSTOM-C264
33KV FEEDER -1 (O/C & E/F)-GE-F650
33KV FEEDER -2 (O/C & E/F)-GE-F650
33KV FEEDER -3 (O/C & E/F)-GE-F650
33KV FEEDER -4 (O/C & E/F)-GE-F650
33KV FEEDER -5 (O/C & E/F)-GE-F650
33KV FEEDER -6 (O/C & E/F)-GE-F650
33KV FEEDER -7 (O/C & E/F)-GE-F650
33KV FEEDER -8 (O/C & E/F)-GE-F650
33KV BUS SECTION (O/C & E/F)-GE-F650
CPP-2_GENERATOR_MAIN-1_DIFFERENTIAL_REG670_ABB
CPP-2_GENERATOR_MAIN-2_DIFFERENTIAL_REG670_ABB
CPP-2_GENERATOR_OVERALL DIFFERENTIAL_RET670_ABB
CPP-2_UAT-1&2_OC&EF_REF615_ABB
220kV BUS BAR_DIFFERENTIAL_CAG_ALSTOM
220kV BUS BAR_DIFFERENTIAL_MVTP_ALSTOM
LBSS-4_ TRANSFORMER-1,2&3 RELAY MAKE, MODEL & SETTING FILES
LBSS-7_TRANSFORMER-1,2,3&4 RELAY MAKE, MODEL & SETTING FILES
220KV-CKPALLI 1&2&3&4- MAIN 2-DISTANCE-GE-D60(recived in hard
copy but require .csv format)220KV-YERRAGUNTLA 1&2- MAIN 2-DISTANCE-GE-D60(recived in hard
copy but require .csv format)
220kV - BUS BAR-DIFF- ALSTOM -P741
ST2 HV- DIFF-ABB-RET620
ST2 HV- OC&EF-ABB-REF615
ST5 HV- DIFF-AREVA-P632
ST5 HV- OC&EF-AREVA-P127
ST3 HV-OC&EF-AREVA-P127
ST7 HV- DIFF-ALSTOM-P642
ST7 HV- OC&EF-ALSTOM-P141
ST7 LV- REF-ALSTOM-P141
GEN 5- MAIN 1– OVERALL DIFF-ABB-REG670
GEN 5 – STATOR &ROTAR EF-ABB-REG316
GEN 5-MAIN 2 – OVERALL DIFF-ABB-REG670
GT 5– OVERALL DIFF-ABB-RET670
GT 5 LV – EF-ABB-RET610
GT 5 LV – OC-ABB-RET610
UAT 5A- DIFF-ABB-RET670
UAT 5B- DIFF-ABB-RET670
GEN 1&2&3&4 (GROUP2)– 100% STATOR EF-SIEMENS-7UM62
RAYALSEEMA THERMLA POWER PLANT
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented.
48 RAYAL SEEMA THERMAL
POWER PLANT
Stage-1,2&3-Generator data parameters are not received.
Inertia, Saturatred Reactances-Xn,Xp. Open circuit time
constants - T'do,Tqo, T'qo. Continuous I2 current in %,I2^2*t
constant. Negative Sequence Reactance,
Zero Sequence Reactance.
Thermal Curves of the generator,
Generator NGR rating.
Protection SLD of Generator, GT & UAT. Complete
SLD of Power House.
Excitation system transfer function diagram
implemented in the station. The type of AVR (Ex: DC
Exciter, Static Exciter, AC Exciter etc.,), the gains and
time constants implemented in the system are to be
provided. AVR data sheet is required.
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
PRASAD - 9440907129
([email protected])RTPP, Kalamalla(v),yeraguntala mandal,Kadapa(Dt),AP-516312
ANRAK ALUMINIUM LTD
47 ANRAK_GS
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented.
Excitation system transfer function diagram
implemented in the station. The type of AVR (Ex: DC
Exciter, Static Exciter, AC Exciter etc.,), the gains and
time constants implemented in the system are to be
provided. AVR data sheet is required.
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
Prasad; 8978880612
)
Anrak Aluminium Ltd
G.Koduru(V),Makavarapalem(M),Visakhapatnam(D)-531113GENERATOR NGR RATING
Settings all are in handwritten only, no one person is not there to
download the setings
VIZAG STEEL PLANT
46 VIZAG STEEL PLANT
VSP complete switchyard SLD with all
equipments(CT,Isolators,PT,CVT,etc) placements.Adopted CT
Ratios of all Lines, Transformers(HV&LV) & Generators. CT core
details of Generators & GT. All three winding and two winding
transformer name plate details of LBSS-5. Transformer name
plate details of LBSS-7.
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented.
Excitation system transfer function diagram
implemented in the station. The type of AVR (Ex: DC
Exciter, Static Exciter, AC Exciter etc.,), the gains and
time constants implemented in the system are to be
provided. AVR data sheet is required.
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
F.KIRO; 8897706738
([email protected])Vizag Steel Plant Vizag
LBSS-5_ALL GENERATOR(TG-1,2,3,4,5 & TRT COB4 TG & NEDO GEN)
PROTECTION, GT PROTECTION & UAT PROTECTION RELAYS MAKE
MODEL AND SETTINGS
NTPC-SIMHADRI
45 NTPC SIMHADRIPercentage impedance of GT-1&2, ST at maximum,minimum &
nominal taps.Open circuit time constants - T"qo, T'qo.
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented.
Excitation system transfer function diagram
implemented in the station. The type of AVR (Ex: DC
Exciter, Static Exciter, AC Exciter etc.,), the gains and
time constants implemented in the system are to be
provided. AVR data sheet is required.
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
C.Malakondaiah (8331019075);
Ravivarma 9493174808;
NTPC-Simhadri
Visakhapatnam - 531020
RAIN CII CARBON(VIZAG) LTD
44 RAIN CARBON
UAT name plate details with max and min taps and their
respective voltages. 132KV
Essar and Naval Wharf line length and conductor details.
Genarator & UAT side CT name plate details like Accuracy
Class,Burden,KPV,Rct,Magnetization Current.
MRV RAJESH PH-
0891-2822825
CELL.NO:9440154388
RAIN CII CARBON(VIZAG) LTD,
SCINDIA ROAD,
VISAKHAPATNAM-14.
HINDUJA NATIONAL POWER CORPORATION LTD
43HINDUJA NATIONAL POWER
CORPORATION LTD
Governor system transfer function diagram
implemented in the station. The type of governor (Ex:
Hydro, thermal, hydraulic etc.,) the gains and time
constants implemented.
AVR Transfer block function, time & gain constant values
has to be proivded
Whether PSS unit is enabled or disabled. If enabled,
provide details of PSS block diagram, time constants,
and gains used.
T.Y.S.R.K.KIRAN; 8106133388
Hinduja National Power Corporation Limited(2X520 MW TPP)
VISAKHAPATNAM, Andhra Pradesh
ECORON WIND FARMS
42 ECORON WINDS Imtiyaz ahmad PH:8105435151 COMMUNICATION PROBLEMWIND TURBINE , GENERATOR DATA SHEET & GENERATOR
TRANSFORMER NAME PLATE DETAIL HAS TO PROVIDE
Annexure-IV
Page 17 of 17