protection in main-2 distance relay (micom-p444) during 220kv downstream fault near gooty. direct...

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



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.

http://srldc.in/Reports.aspx

mailto:[email protected]

Agenda for the 79th



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.

*****

mailto:[email protected]

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


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


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


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


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.


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: 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.


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.



under tendering.




evaluation


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.


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.


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:



evaluation --- Pending


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.


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.




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.


1. Week end infeed logic will be enabled in the new numerical relays supplied to Karwar under

R&U during retrofitting works.

--- Pending


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


PGCIL may be requested to take necessary action


2. EL procured and drawn. Configuration to be done by Alstorm company engineer. Will be

configured in four weeks.

---Pending


2. APTRANSCO is to replace the faulty/outdated relays & POWERGRID has to maintain the relays

after retrofitting.


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(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


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


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


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.


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.


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


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.


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




be taken up on top priority through GE Ltd.


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


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


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


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]


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


Issue was addressed to the concerned for necessary action.


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.


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.


PGCIL (SR-I) informed that they are waiting for written confirmation from TPCIL to complete



TPCIL by Dec, 2017, they would be able to complete the work by FEbruary, 2018.


April, 2018.




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


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.


SNEIDER make LDP relays inspection yet to be completed.Delivery of relays expected in the

month of june 2018.





ABB make LDP relays are delivered. Schneider make LDP relays inspection to be offered by the

company.


schneider LDP relays inspection yet to be offered by the company.


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


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


NPS line-1, 400 kV



18-07-2016

at 19:05 hrs








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


Chennai TPS STG-2

25-04-2017

at 18:27hrs


Unit


Chennai TPS STG-2

26-03-2017

at 21:09 hrs


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.






insulators in a phased manner. Timeline: Sep-2018.



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.


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.






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


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


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


TSTRANSCO informed that the works are under progress, and are targeted to be completed in 3

months time.


Line Differential Protection will be provided within 3 months i.e., by end of March, 2018.


Line Differential Protection relays are under procurement and will be provided by end of May,

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


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)


PGCIL (SR-I) informed that they are waiting for written confirmation from TPCIL to complete



TPCIL by Dec, 2017, they would be able to complete the work by February, 2018.


April, 2018.







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.


1. ---Pending

2. PGCIl(SR-1): B-Ph auxiliary relay problem rectified at Narnoor end by replacing relay contact. --

-Completed


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.


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.


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):






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:






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


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.


Clarification on proposed modification for disabling DT from SRLDC & SRPC got on 05.07.2018.

Will be implemented within a month.


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)


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


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)


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


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


NPS line-1, 400 kV



18-07-2016

at 19:05 hrs








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.


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.


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


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.


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


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


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.


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: Purchase order was placed on 08.03.2018 for procurement of CVT’s & after receipt


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: Purchase order was placed on 08.03.2018 for procurement of CVT’s & after receipt



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.


1. TSGENCO: Purchase order was placed on 08.03.2018 for procurement of CVT’s & after receipt



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.


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: 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.


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


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


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.


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.


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)


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


1),3),4) Completed

2. Auto Start of DG set is taken up --- Pending


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


AMF panel procurement under progress.

Pending


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 coordination with

EE(RT), KPTCL, Hubli.


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


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.


Numerical Generator protection relay replacement proposed to be taken up alongwith SCADA

work.

Pending


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


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.


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.


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


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.



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


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


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.


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.


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


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.


SEE,SCADA to update the latest status


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.




be taken up on top priority through GE Ltd.




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


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.






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.


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.


1 & 2) KPTCL informed that the works are under progress and are targeted to be completed by

February, 2018.

Pending

42/I/2

(GD)


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:




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


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


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.


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.


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.


KPTCL informed that the revised setting would be implemented by December, 2017.


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.


Enabling the AR feature was discussed during PCSC meetings and since Ambewadi-Ponda and



Up EFR timings have been reducedto 150mS.


Enabling the AR feature was discussed during PCSC meetings and since Ambewadi-Ponda and



Up EFR timings have been reduced to 150mS. In view of the above, it is requested to drop the

issue from this list.


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


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.


GPS and accessories will be supplied during May 2017, expected to complete the work within a

month after supply of materials.


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


1) & 2) KPTCL informed that the works are under progress, and are targeted to br completed by

February, 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


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.


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.


Due to operational constraints two/ multi bus operation is not being implemented.


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


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


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.


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.


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


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.


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


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


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


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.


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:



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


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


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


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


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


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


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


1) Check zone New Relay is replaced on 17.04.2017 -- Completed.

2. --- Pending

3. --- Pending


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


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)


Modifications to be carried in Nagzari SPS logic is submitted to SRLDC/SRPC for verification and

approval


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.


2. Proposed revision in existing SPS scheme is already submitted to SRLDC/SRPC., yet to be

discussed and approved by the SRPC forum. --- Pending


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:


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.


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.


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:



Status received vide mails received on 10-11-2016 & 20.12.2016 & 12.04.2017 & 01.06.2017 &

15-06-2017 & 04.08.2017:



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.


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:


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


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.


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.


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.


Bus coupler bay equipments allotted will be commissioned by Aug 2018


Commissioning of CT in Bus Coupler bay is under progress


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.


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.


Providing new Bus coupler bay involes bay shifting work.work awarded and under progress.

Time line. Dec2018.



Time line. Dec2018.



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..


TANTRANSCO informed that Numerical BBP would be commissioned by March, 2018.


Commissioning of Numerical Bus bar protection is under progress. Zone segregation will be

ensured. Timeline: March-2018.

55/I/1

(GD)


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


Madurai S/s (Chekanaurani) of

TANTRANSCO


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.


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.



coupler bay. Numerical BBP relay has been provided and tesing under progress.



coupler bay.

Annexure-II

Page 32 of 47


Numerical Busbar protection relay commissioned on 14.05.2018


Control & Status of isolator feedeback to be provided by replacement of Drive Mechanism box.





Timeline requested upto Dec 2018.

55/I/1

(GD)


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.


TANTRANSCO informed that the recommended works of providing different make Relays for

Main-I & Main-II are targeted to be completed by September, 2018.



phased manner. Timeline: September-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.


provision of Different make Relays for Main-I & Main-II will be completed by September, 2018.







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


2) TANTRANSCO informed that Numerical BBP would be provided by April, 2018 --- Pending


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.


1. Complied


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


2) TANTRANSCO informed that Numerical BBP would be provided by April, 2018 --- Pending


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:



1. Complied


TANTRANSCO

Annexure-II

Page 35 of 47

64/1/4 Complete outage of North

Chennai TPS STG-1

26-03-2017

at 23:14hrs


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


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


2) TANTRANSCO informed that A/R would be implemented on all 230 kV lines emanating from

NCTPS-I by June, 2018.


1. Complied.



within six months. Timeline:June-2018.

Pending




Timeline:Sep -2018.


1. Complied.



Timeline:Sep -2018.


AR implemented for 4 feeders and remaining lines will be provided with AR subsequently.


1. Complied

2. AR enabled for 3 feeders.


1. Complied

2. AR enabled for 5 feeders.


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


OEM being referred to attend the issue


Under Implementation.


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

Kerala

Annexure-II

Page 38 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.


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)


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):






PGCIL (SR-I)


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


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.


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.


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.


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.


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.


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



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



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.


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





08-07-2018

at 20:10 hrs



Agenda.





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



Agenda.





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


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


TSGENCO: Line tripped on R-N fault , AR


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


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





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


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





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


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

([email protected])

A.Gurubabu - 9440810925

([email protected])

5 BHIMADOLE -

-NIDADAVOLU1

-KAMAVARAPUKOTA -220kV6

-VEMAGIRI-APTRANSCO7

A.Gurubabu - 9440810925

([email protected])

-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


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

([email protected])

HARD COPY SETTINGS ONLY GIVEN


19 NELLORE-220kV 220kV MANUBOLU-3-DISTANCE_GE_LPS

C.S.S. Anjaneya Prasad -

9440811167([email protected]

m)



10 RAMAVARAM -



HAND WRITTEN SETTINGS GIVEN DUE

TO NON COMMUNICABLE

SUBRAYANPALLI15



13 TADIPADRI

A.Gurubabu - 9440810925

([email protected])

-KAKINADA9

11 ANANTHAPUR

GOOTY (SWS)16



Venugopal - 9491030762

([email protected])BOKSAMPALLI17

Srinivas - 9440811151

([email protected])



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


C.S.S. Anjaneya Prasad -


m)

SULURPETA

RELAYS ARE NOT

COMMUNICATING,THEY WILL SEND

LATER

RAJENDRA BABU PRASAD

ph:9440811137 mail

id:[email protected]

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


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


,THEY SEND WILL LATER


ph:9440811137 mail



ph:9440811137 mail


RECEIVED STG FILE DUE TO NOT YET

DOWNLOADING REQUIRED FORMAT

BUT WE REQUIRED .CSV FILE

NAGABHUSHANAM 9440810961

[email protected]

M.SAM PRAKASH PH:9440811176

[email protected]

RECEIVED HARD COPY,THEY WILL

SEND BY BEFORE 28 SEP 2018



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

([email protected])

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

([email protected])

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


9440811131

([email protected])

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

([email protected])

K. Vikram -

9491045414([email protected])

RAJEMPETA43


9440811131

([email protected])

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 -


om)

Communication problem

50 KONDAPALLIA.Sambasiva Rao - 9440811162

([email protected])

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

([email protected])

54 VAJRAKARUR COMMUNICATION PROBLEM

52 PARCHURE.RAJENDRA PRASAD PH:7382296893


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 & 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-2(DIFF)-NR-ELECTRIC-PCS978



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







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 AUX TRANSFORMER-1 (O/C E/F)-SCHNEIDER-C264

33KV AUX TRANSFORMER-2 (O/C E/F)-SCHNEIDER-C264

B.V Ramana Murthy - 9440810960

([email protected])

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



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 LV (O/C & E/F) SIFANG-CSC-211


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



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

([email protected])

60 GALIVEEDU PS-2KRISHNA KISHORE PH: 6300578387


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



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

([email protected])

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

([email protected])

61 GALIVEEDU PS-1KRISHNA KISHORE PH: 6300578387


Er.Sri.A.Srinivasu Ph.No.9491041192

([email protected]

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

([email protected])

65

FIXED SERIES COMPENSATION-1&2

CAPCITOR BANK DETAILS

M.MALLIKARJUNA - 9490690301

([email protected])

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.


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

([email protected]

4 GVK GAUTAMI-469 MW - -


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

-


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



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,


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


Static excitation system is used. The time constants and

Gains are not known has to be provided.



and gains used.

B.VEERABABU - 8977532246

([email protected])

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





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



and gains used.

A.Srinivas Rao - 8897173337

([email protected])

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

([email protected])

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













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)





GMR VEMAGIRI POWER GENERATION LTD,vemagiri village,kadiam

Mandal,E.G.Dist,AP-533125

M.S.V.SUBRAHMANYAM -

8332970813

([email protected])

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

([email protected]

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





- -

GMR-PHASE-1 -

1*230+1*156.1535 MW

STG Generator data parameters are partially received.

Following generator parameters are pending -


Open circuit time constants - T'qo, T''qo, Continuous I2 current

in %,I22*t constant





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


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


Annexure-IV

Page 13 of 17

14 SDSTPS_NELLORE -2*800MW Generator data sheet has to be provided





Srinivasalu-9493120147

([email protected])

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



Saturated reactances- Xq,Xq',Xq'',

Open circuit time constants -T''qo, Generator interia

Constant(H)





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






has to be proivded

PSS Transfer block function, time & gain constant

values has to be proivded

D.Narendra Reddy-9676404472

/9848281108

([email protected])

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


has to be proivded-

Ramesh-7032967438

([email protected])

pyanampuram/nelaturu Village,Muthukur

mandal,Krishnapattinam,nellore.

19 SEIL(TPCL) - 2*660 MW






has to be proivded-

JOJIBABU-8179780450

([email protected]

)

pyanampuram/nelaturu Village,Muthukur

mandal,Krishnapattinam,nellore.

20NAGARJUN SAGAR RCPH -

3*30.6 MW



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


ASEA FRVA model is used . The Transfer function block

diagram,time constants and Gains are not known has to

be provided.


static excitation system . The Transfer function block


be provided..



and gains used.

Y.Sreenivasa - 9490644910

([email protected],in)

21NAGARJUN SAGAR TAIL POND-

2*28 MW



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





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



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










D.VENKATA RAMANA RAO

PH.NO:9491049480

23 NTTPS - 6*210+1*500 MW



Armature resistance Ra(Unit-3&4), Saturated reactances-

Xq,Xq',Xq'', Xp,Xn,Xo,

Open circuit time constants - T''do,T'qo, T''qo









provided. AVR data sheet is required. (except-stage-

1&4)

IVL KOTESWAR RAO -

9440907622

([email protected],iv

[email protected])

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



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.




constants implemented.






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.






static excitation system . The Transfer function block


be provided..



and gains used.

S MAHESH; 9493120705

([email protected])

MOHANA RAO;

9492174317

(seethamohanbhavaraju@gmail.

com)

25 HAMPI PH




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.






has to be proivded



and gains used.

SRINIVASULU REDDY;

9449868602(de_hph@rediffmail.

com; [email protected])

24 DONKARAYI PH


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












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






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-


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



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.










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

([email protected])

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 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 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



and gains used.

KRISHNAM RAJU; 9493121114

([email protected])29 UPPER SILERU PH




in %,I2^2*t constant. Negative Sequence Reactance, Zero

Sequence Reactance.Capability &Thermal Curves.










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.












and gains used.

RAVI; 9449868601

([email protected])

HELIOS INFRATECH PVT LTD

41 HELIOS INFRATECH WIND

T J SURESH PH:8019810293

EMAIL

ID:[email protected]

SLD,WIND TURBINE , GENERATOR DATA SHEET & GENERATOR


GREENKO WIND FARMS

40 GREEKO WIND FARMS

VISHAWANATH.P

PH:9959552277 EMAIL

ID:vishawanath.p@greekogroup.

com



AXIS WIND FARMS

39 AXIS WIND FARMSSunil kumar PH: 7995571215

EMAIL ID :[email protected]

SLD,WIND TURBINE , GENERATOR DATA SHEET & GENERATOR


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



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




constants implemented (STAGE-1 GTG 7 STG) & (STAGE-

2 STG)


has to be proivded (STAGE-1 GTG AND STG) AND (STAGE-

2&3 GTG)



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

([email protected]

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 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





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.








and gains used.

PRASAD - 9440907129

([email protected])RTPP, Kalamalla(v),yeraguntala mandal,Kadapa(Dt),AP-516312

ANRAK ALUMINIUM LTD

47 ANRAK_GS












and gains used.

Prasad; 8978880612

([email protected]

)

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.












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.












and gains used.

C.Malakondaiah (8331019075);

Ravivarma 9493174808;

([email protected])

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






has to be proivded



and gains used.

T.Y.S.R.K.KIRAN; 8106133388

([email protected])

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


Annexure-IV

Page 17 of 17

protection in main-2 distance relay (micom-p444) during 220kv downstream fault near gooty. direct...

Documents