psc

INTERNAL TRAINING KIT

This training kit is basic step for operations in PSC. Overview of PSC contribution towards NDPL vision

SUJATA GURUJI09/01/2010

NORTH DELHI POWER LIMITED, DELHI

WORK INSTRUCTION /OPERATING GUIDELINESDoc. Title Internal Training Guideline Doc. No W01(PSC-P-12) Eff. Date : 01-04-2011Rev. No 02 of 51Prepared BySujata Guruji

Reviewed By Jayanta Chatterjee

Approved BySanjay Banga

Issued ByAjit Maleyvar

INDEXSr. No. Detail Page No.

1EMPLOYEE DETAIL

3

2 CHAPTER-1 INTRODUCTION 4

3 CHAPTER-2 NETWORK OVERVIEW 15

4 CHAPTER-3 SCADA & DMS OVERVIEW 21

5 CHAPTER-4 FIELD VISIT 29

6 CHAPTER-5 PSC Questionnaire 33

7 CHAPTER-6 Simulator

Training 36

8 CHAPTER-7 Flash report/GD/PTW Registers entry 40

9 CHAPTER-8 Preparation of MIS 41

10 CHAPTER-9 Real time operation 42

11 CHAPTER-10 Authorization Interview 44

12 CHAPTER-11 Overview of SA-8000 & TBEM

46

13 CHAPTER-12 Training Report 48

14 Abbreviation 49

2 | P a g eProperty of NDPL – Not to be reproduced without permission of NDPL






EMPLOYEE DETAIL

1 Name ( Mr. / Ms) :-

2 EMP NO:-

3 Designation :-

4 Contact No. :-

5 Transferred From

Department :-

Designation :-

Functional Designation :-

Location :-

6 Release on Date :-

7 Date of joining in PSC :-







8

Job History :-

CHAPTER-1 INTRODUCTIONNDPL is incorporated in July’2002 as joint venture of TATA Power (51%) and Delhi Government (49%).

NDPL took over Delhi Vidyut Board (DVB) in North & North west of Delhi

Geographic Description of NDPL area is below

NDPL covers total area of 510 Sq Kms. Total nos. of consumer served by NDPL is 11, 35,701







The DERC regulate the working of entire Power Sector of Delhi State

Delhi Transco Limited (DTL) is the State Transmission Utility responsible for augmenting and maintaining

existing Transmission System consisting of 220kV and 400kV sub-stations and Transmission Lines

Network, efficiently and effectively in the National Capital Territory of Delhi.

State Load Dispatch Center (SLDC) under Delhi Transco Limited was created, as an Apex Body to ensure

integrated operation of the power system in Delhi.

Power System Control is nodal department responsible for all operations of NDPL Grid Substation to

SLDC. PS&T is overall responsible for load management of whole NDPL network

PSC is taking care of Day Ahead Power Scheduling activity. Co-ordination with SLDC, NRLDC for

updation.

1.1 How does Power reach us? Electric power is normally generated at 11-25kV in a power station. To transmit over long distances, it is

then stepped-up to 400kV, 220kV or 132kV as necessary. Power is carried through a transmission network

of high voltage lines. Usually, these lines run into hundreds of kilometers and deliver the power into a

common power pool called the grid. The grid is connected to load centres (cities) through a sub-

transmission network of normally 33kV (or sometimes 66kV) lines. These lines terminate into a 33kV (or

66kV) substation, where the voltage is stepped-down to 11kV for power distribution to load points through

a distribution network of lines at 11kV and lower.

The power network, which generally concerns the common man, is the distribution network of 11kV lines or

feeders downstream of the 33kV substation. Each 11kV feeder which emanates from the 33kV substation

branches further into several subsidiary 11kV feeders to carry power close to the load points (localities,

industrial areas, villages, etc.,). At these load points, a transformer further reduces the voltage from 11kV

to 415V to provide the last-mile connection through 415V feeders (also called as Low Tension (LT)

feeders) to individual customers, either at 240V (as single-phase supply) or at 415V (as three-phase

supply). A feeder could be either an overhead line or an underground cable. In urban areas, owing to the

density of customers, the length of an 11kV feeder is generally up to 3 km. On the other hand, in rural

areas, the feeder length is much larger (up to 20 km). A 415V feeder should normally be restricted to about

0.5-1.0 km. Unduly long feeders lead to low voltage at the consumer end.







1.2 Intra state ABT in Delhi:- Intra state ABT ( Availability Based Tariff) & Reallocation of PPAs ( Power purchase Agreement ) was

implemented in Delhi on 1st April 2007 , Power Procurement became responsibility of respective

distribution utility ( Earlier with State Load Dispatch Centre).

Unscheduled Interchange (UI) was introduced, UI is the frequency linked per unit charges which

distribution utility will pay if Power drawal more than sanctioned by State Load Dispatch Centre and

received if Power drawal less than sanctioned.

Trading was introduced for ‘Short term’ & ‘Day ahead’ Power as per Electricity Act ‘03 in 2007.

Power availability is ensured through three ways:

1. Long term agreement

2. Medium/short terms agreements.

3. Day Ahead trading

4. Real time in contingency

Power distribution is regulated business by DERC and CERC. There is various regulations under which

power distribution company need to operate

The charges for Unscheduled Interchange shall be worked out on the average frequency of the time-block

at the rates given hereunder –







-Each 0.02 Hz step is equivalent to 15.5 (paisa/kWh) in the 50.2-49.7 Hz frequency range and to

47.0 paisa/kWh in the 49.7-49.5 Hz frequency range)

Below Not below (Paisa per kWh)

---- 50.2 0

50.20 50.18 15.5

50.18 50.16 31

----- ----- -----

50.04 50.02 139.2

50.02 50.00 155

50.00 49.98 170.50

----- ----- -----

49.80 49.78 325.50

49.78 49.76 341

49.76 49.74 356

---- ----- -----

49.52 49.50 826

49.50 - 873

1.3 Functional Objective of PSC:-

Effective monitoring and control of operations through SCADA & DMS

Effective Day Ahead Power Scheduling ( Load Foresting & Day Ahead Trading)

Ensure safety of workforce, public & equipment

Nodal department for timely capturing of reliable data pertaining to operations

Operationalising of DMS & DA

1.4 Objective & Strategy of PSC:-

Objective & Strategy of PSC is prepared on the basis of Department Balance Score Card (BSC). Objective

& Strategy of PSC is monitored monthly.

S. No. Objectives MeasureUnit Of

Measure (UoM)Targets

1Ensure accurate Power

Scheduling

No of days Accuracy of Demand Schedule (+ / -)w.r.t. (Actual Drawal +

MUs lost due to all reasons except ISLS) not achieved

% (+ / -) 6%







2Optimize Utilization of

ResourcesOptimize Network Utilization

Nos. -

No of Zones 36

3Timely resolution of

requestsNumber of instances when SLAs have

not be complied with on time%

0%

0%

4Effective monitoring and

control of operations

Wrong Operations Nos. 0

Reduction in MUs shed at 11 kV (excluding ILS)

% 1

5Ensure safety of

workforce, public & equipment

Non - Compliance to Safety Tagging Guidelines

Nos. 1/Day

6Timely capturing of

reliable data pertaining to operations

Adherence to the timelines to release the Flash & ABT Report

% 0%

7Innovations &

improvements in Processes

SHINE Projects Nos. -

Improvements Nos. -

8Create organized and

ethical working environment

5S Score 80%

Ethical Concerns Nos. -

9Ensure Training &

Development of workforce

Training Mandays (CENPEID ) %6

Mandays /Person

Training Mandays (CENNET -DTS ) %Mandays /Person

No. of Training Sessions conducted by PSC member at Cenpeid

Nos. -

SEEKH Sessions Nos. 1 per Month







1.5 Overview of Critical Activity and Process in PS&T:- There are various IMS process in PSC listed below:- PSC-P-01_Periodic operation reports

PSC-P-02_Outage Management

PSC-P-03_Power Scheduling and Reporting

PSC-P-04_ Load Management, System monitoring & Attending to Interruption

PSC-P-07_Notification for System Alteration

PSC-P-10_Operationalize of Distribution Management System

PSC-P-12_Internal Training

Brief detail of each process:-

PSC-P-01_Periodic operation reports:-

There are various reports generated from PSC Daily/Weekly/quarterly /monthly /annually

Work instruction for preparation of various reports is available.

There are some critical reports sent to management daily before 08:00 A.M. in the night shift.

These reports are:-

1) Flash report with all annexure

2) Operational Summary

Flash report with all annexure:-

Flash report is customized software developed by external developer.

All operational activities were enter in this software daily in each shift

Detail of the PTW issued, breakdown, Load shedding, Equipment not in service (Pending

Equipments) etc.

In the night shift, customized report generated for the day after 24:00 Hrs. and all the reports were

cross checked for any entry error or abnormal value.

Check for Flash report will be filled and upload in ndpl-o-pedia.

Detail procedure for preparation of report will be explained later in training process.

Operational Summary :-

Operational Summary is automatic report generated from flash report

This report compliance Detail of SAIDI, CAIDI for NDPL, Peak Demand meet, Highest consumer

affected in any zone, lowest consumer affected in any zone for the day etc.

PSC-P-02_Outage Management:-

Outage management is divided in two parts:-

1) Subtransmmision System (33kV & 66kV )

2) Distribution System (11kV & Below)







Subtransmmision System (33kV & 66kV) outage Management:-

Sub Transmission outage planning done on weekly basis on every TUESDAY.

Three Steps of Outage Scheduling:

1) System Outage Request: -

Two types of Outage Request:

PM05 (Preventive Maintenance):-

PM05 is annual maintenance for electrical equipment. 33kV & 66kV electrical equipment

were maintained annually

For PM05 –SAP generated entry maintain by MPG (Maintenance Planning Group) in SAP

PM03 (Predictive Maintenance):-

For PM03 -Outage Request entry done by respective Grid /Line JE in SAP. Predictive

Maintenance includes project work, Hot spot attending, Tree trimming etc.

2) System Outage Scheduling

After receiving outage request from SAP, Low flow analysis will be done for shut down of circuit

and transformer.

Outage will be finalized and enter in flash report software and mail to all concerned.

3) System Outage Monitoring :-

System outage monitoring done on schedule outage day execution. Outage is executed as per

Normal Operating Procedure. Check list for each shut down will be filled.

Distribution System (11kV & Below)

Distribution outage planning done on daily basis for N+2 day.

1) Distribution Outage Request: -

Distribution outages request will received through SAP N-2 day working days in advance till 12:00

Hrs.

Two types of Outage Request:

PM05 (Preventive Maintenance):-

PM05 is annual maintenance for electrical equipment. 11kV electrical equipment were

maintained annually

For PM05 –SAP generated entry maintain by MPG (Maintenance Planning Group) in SAP

PM03 (Predictive Maintenance):-

For PM03 -Outage Request entry done by respective Zone /Grid Owner in SAP. Predictive

Maintenance includes project work etc.

2) Distribution Outage Scheduling







Outages with all detail provided will enter in flash report software

Request will reject through SAP if all the details were not provided by zone

Outages request for the zone where DMS is implemented is check through DMS outage

check list

3) Distribution Outage Monitoring:-

Distribution outage monitoring done on schedule outage day execution. Outage is executed as

after issuing PTW to working party.

PSC-P-03_Power Scheduling and Reporting:-

Power scheduling includes following activities:-

1) Load forecasting for next Day

2) Preparation of ABT report

3) Power trading for next day

4) UI Bill verification

Load forecasting for next Day:-

Load forecasting for next day prepared in 96 block (15 min for the day) . During preparation of

load forecast, Weather Forecast for next day, actual weather for lat day, actual drawal (MW) for

last day and the same day of last week were considered

Preparation of ABT report :-

ABT is customized software developed by external developer.

Power summary for the day is displayed in ABT report. ABT report include highest demand meet

by NDPL, Load shedding, generating station status, Frequency profile for the day etc.

We have AMR system established in PSC for reading boundary line meters and we upload the

data in ABT software after 24:00 Hrs in night shift.

We calculate total NDPL drawal from AMR System and SCADA data

In the night shift, customized report generated for the day after 24:00 Hrs. and all the reports were

cross checked for any entry error or abnormal value.

Detail procedure for preparation of report will be explained later in training process

UI Bill verification

UI bill is received from SLDC for NDPL overdrawal, underdrawal & Penalty

Ui bill is verified by PSC and send to PMG

PMG will highlight in respective forum if there is any discrepancies were observed

PSC-P-04_ Load Management, System monitoring & Attending to Interruption

In this process, PSC monitors the whole NDPL network.







Alarms for the circuits, transformers after protection tripping will receive in MCC. The detail of

protection alarms verbal inform to protection department. Load normalized on alternate circuits or

transformer if possible or load back fed or Rotational Load shedding will be carried out

PTW will be issued as per PTW guideline W01 (PSC-P-04) for breakdown or emergency shut

down

Distribution PTW will be issued from DMS Desk. DMS network will be updated after any operation

Load shedding is carried in NDPL for various reasons

Types of Load shedding are:-

1. DLR (Distress Load Relief )

2. ISLS (Intentional Load Shedding )

3. UFR (Under Frequency relief)

4. Load shedding due to Breakdown, Supply Fail, Emergency shutdown etc.

DLR (Distress Load Relief ):-

Frequency is monitored regularly and DLR is carried out as per below conditions

There are various DERC regulations which need to be followed for power management

DLR schedule is prepared as per date & time slot and communicated to consumer through

various channels:-

Power updates THRICE A DAY on FM RADIO

“SANCHAR” – ANNOUNCEMENT (MUNADI) in areas affected due to shut downs

NDPL distributes Public Handouts in case of Power Shortage.







We will

Carry out the DLR as per below conditions:-

Frequency <=49.5 { IF ( NDPL_OD > 0 )







Load shedding = (NDPL_OD) MW Else (NDPL_OD < 0) No Load shedding }

ISLS (Intentional scheduled Load Shedding )

There are few 11kV feeders having AT&C loss more than 40% with large power theft. Load

shedding is carried out for such feeder to minimized illegal use of electricity

11kV feeders with AT&C loss will be provided by energy audit group. We select the feeders

with AT&C loss more than 40%

Shedding of these feeders done on daily basis as per loss level.

Updation of same has been done on requirement of District Manager or Zonal Manager as a

when required.

Load entry of ISLS feeders done by duty staff in format at the time of shedding in Flash

Report

UFR (Under Frequency relief):-

Frequency is regulated by DTL to avoid grid disturbances. Frequency is monitored within the

range of 50 – 48.8 Hz

There is UFR Relay installed at 220kV Grid Sub stations. There is schedule prepared for

UFR relay operations.

There are three UFR Stages operations:-

1) Below 48.8 Hz

2) Below 48.6 Hz

3) Below 48.2 Hz

For each stage the configured load will be get shed after the respective frequency stages

Sample schedule is given below:-

Grid Name Circuit 1 2 - - 15

16 17 - - 30 &31

220 KV Gopal PurJahangir Puri Ckt.- 1 & 2, 11 kV Bhai Parmanand and Mukherji Nagar.

9-10 10-11 - - 0-1

220 KV Gopal Pur220 kV Subzi Mandi Ckt-1, 33 kV Azad Pur Ckt-1 & 2, 11 kV Shahalam Bandh

10-11 11-12 - - 1-2

220 KV NarelaJahangir Puri Ckt.- 1 & 2, 11 kV Narela U/G, Narela O/H, DDA A-5 & DDA B-4

11-12 REST - - 2-3







220 KV NarelaBadli Ckt.- 1 & 2, 11 kV Bawana & DSIDC Narela

REST 0-1 - - 3-4

220 KV Shalimar Bagh

Wazir Pur - 2 Ckt.- 1 & 2 0-1 1-2 - - 4-5

220 KV Shalimar Bagh

Wazir Pur - 2 Ckt.- 3 & 4 1-2 2-3 - - 5-6

220 KV RohiniRohini - 5 Ckt.-1 & 2, Rohini Sec.-22 Ckt. and Rohini Sec.-23 Ckt.

2-3 3-4 - - REST

220 KV Rohini Rohini - 4 Ckt.-1, 2 & 3 3-4 4-5 - - 6-7

220 KV Naraina

Rewari Line Ckt.- 1 & 2, Payal Zonal office, Maggo-1 & 2, A-Blk Shopping Centre, Naraina Village

4-5 5-6 - - 7-8

220 KV Naraina 33 kV Inder Puri Ckt 5-6 REST - - 8-9

Rohtak Road33 KV Rampura ckt. - 1 & 2, Rama Road Ckt. And Shahzada Bagh Ckt.

2-3 3-4 - - REST

Rohtak Road33 KV S.B. Mill Ckt. - 1 & 2 and Madi Pur

3-4 4-5 - - 6-7

Rohtak Road

33 Kv Sudarshan Park, Vishal Ckt., DMS Ckt., Parsad Nagar ckt. And Anand Parbat Ckt. ( Faiz Road)

4-5 5-6 - - 7-8

Load shedding due to Breakdown, Supply Fail, Emergency shutdown etc

During tripping of any circuit, transformer or 11kv feeder if the restoration of load from alternate circuit

is not possible or 11kv feeder back feeding is not possible

Loa shedding will be carried rotationally till load can be normalized.

Load shedding of theft feeder is the top priority.

PSC-P-07_Notification for System Alteration:-

Notification for System Alteration

1) Subtransmmision System (33kV & 66kV )

2) Distribution System (11kV & Below)

Subtransmmision System (33kV & 66kV, 11kV )

System alteration involves

Installation of new 33kV or 66kV Bay, Power transformer, 11kv feeders.

Swapping of 11kV feeders.

Augmentation and replacement of Power transformer.

Charging of New grid Sub station







Prior information regarding system alteration should be provided by grid / zonal staff in system alteration

request form.

On basis of that information Power System & Trading generate Notification of system alteration providing

information before and after changes of system after receiving clearance from Automation, Protection &

system.

Notification is mail to all concern (GIS, SAP, and Automation) for system changes.

The same has been updated in SLD & Flash Report software also.

Distribution System (11kV & Below)

Notification for Distribution System is generated only where DMS is implemented

Prior information regarding system alteration should be provided by zonal staff in system alteration request

form.

On basis of that information Power System & Trading generate Notification of system alteration providing

information before and after changes of system after receiving clearance from Automation, Protection &

system.

Notification is mail to all concern (GIS, SAP, and Automation) for system changes to update in GIS SLD,

DMS SLD etc.

PSC-P-10_Operationalize of Distribution Management System:-

This process includes the implementation of Distribution management System in various zones

PSC-P-12_Internal Training

Internal Training process defines the training of new person joining PSC

There is level defined in existing employee

CHAPTER-2 NETWORK OVERVIEW2.1 NETWORK ARCHITURAL:-

NDPL area is divided in various sub area to monitor and control the whole network

Power will flow from 220kv Grid to 33kV/66kV Grid Substation to 11kV feeders to 415 V in Zones


220Kv Grid substation owned by DTL






Classification of Distribution Area (Below 11kV ):-

Total NDPL area is divided in North and North West for Distribution System. Each system is divided in

various 5 nos. of circles. Each circle is sub divided in various 12 nos. districts. Each District is divided in

various zones. There are total 47 nos. of Zone

Classification of Sub transmission Area (33kV,66kV & 11kV ):-


NDPL AREA

NORTH NORTH WEST

CITY CIRCLE TOWN CIRCLE

DISTRICTS:- MOTI NAGAR PITAMPURA KESHAV PURAM4

DISTRICT:- CIVIL LINES SHAKTI NAGAR MODEL TOWN

METRO CIRCLE

SUB URBAN CIRCLE

URBAN CIRCLE

DISTRICT MANGOL PURI DISTRICTS:-

BAWANA NARELA

DISTRICTS:- ROHINI SHALIMAR BAGH BADLI

TOTAL 47 ZONES

NDPL SYSTEM

NORTH CENTRAL

66/33/11 GRID – 1 NO

33/11 GRID – 17 NO

33/11/6.6 GRID – 1 NO

33/11 GRID – 9 NO

66/11 GRID – 9 NO

66/33/11 GRID – 1 NO

66/11 GRID – 13 NO

33/11– 2 NO

NORTH NORTH WEST

TOTAL 56 NOS. OF GRID SUBSTATION

NDPL SYSTEM

33kV/66kV/11kV Grid substation

415V zone






2.2 Electrical Architecture of Grid and Zones:-

Sub transmission Area (33kV,66kV & 11kV ):-

Distribution Area (11kV & Below ):-







2.3 Normal Operating Condition (NOC):-

NOC is the normal load flow of the network when there were no network disturbances. NOC of the network is maintained after ant breakdown, shutdown etc.

NOC diagram shows the pictorial representation of NOC Network NOC diagram is attached as Annexure-1 2.4 Energy Exchange with DTL & BSES:- TRANSCO GRID STATIONS INTER-LINKED WITH NDPL GRID STATIONS

1. 220 KV BBMB2. 220 KV GOPAL PUR3. 220 KV KANJAWALA4. 220 KV KASHMIRI GATE5. 220 KV NARAINA6. 220 KV NARELA7. 220 KV PAPAN KALAN8. 220 KV ROHINI9. 220 KV SHALIMAR BAGH10. 220 KV SUBZI MANDI11. 400 KV BAWANA

BSES GRID STATIONS INTER-LINKED WITH NDPL GRID STATIONS:-

66 KV IMPORT FROM NDPL

NANGLOI

PANKHA ROAD

33 KV EXPORT TO NDPL

SHASTRI PARK

VISHAL

ANAND PARBAT

DMS

MADIPUR

S.B.MILL

MAYA PURI

PRASHAD NAGAR







11KV IMPORT – FROM BSES GRID STATIONS

Grid name 11kv Feeder Name

Vishal Ramesh Nagar-1& 2, Bali Nagar-1 , ESI Hospital

S.B. MillMoti Nagar (TANGA) , 53 Rama Road , Break-Fast , Moti Nagar-2 ( K ) ,N.G. Road , Philips , 70 Rama Road

B.G.Road CSA, DCM-1& 2, Sadar S/Stn

DMSBreak-Fast, Philips, 69 N.G. Road, J & H -Blk Kirti Nagar, Shadi Kham Pur

Faiz Road Tibia College-1&2 , Manak Pura

11KV EXPORT – FROM BSES GRID STATIONS:-

Grid name 11kv Feeder Name

Rohtak Road AFO Punjabi Bagh, Transport Centre, B.D. Nagar, Punjabi Bagh-1&2, Jaidev Park







CHAPTER-3 SCADA & DMS OVERVIEW3.1 SCADA OVERVIEW:-

3.1.1 SCADA CONFIGURATION OVERVIEW:- The basis of any real-time control is the SCADA system, which acquires data from different sources, pre-processes, it and stores it in a database accessible to different users and applications.SCADA is the system which enables to operate Sub transmission (33kV/66kV/11kV) electrical equipment remotely. There is various analog & Digital signals report from each grid sub stations

SCADA is supervisory Control And Data Acquisition

Supervisory Control:- Control functions are initiated by the operators or automatically from software applications and directly affect power system operation.Data Acquisition:- Basic information describing the operating state of the power network is passed to the SCADA system. This is collected automatically by equipment in various substations and devices or calculated. In all cases, the information is treated in the same way.

Basic configuration of SCADA System:-

Communicate with Protocol IEC 60870-5-104

Communicate with Protocol – Modbus RTU


There is BCU (bay Control Unit) installed at 33kV & 66kV Bay equipment. BCU collect the (I/O) digital signal from each bay.

There is TMU (Transformer Monitoring Unit) installed at Power transformer .TMU capture the all transformer signals

1) Argus Protection relays on 66/33kV

Incomer, Transformer. Feeder, Bus-Coupler, Outgoing 2) SEPAM/ABB Relays

on 11 kV Feeders

D20 Data concentrat

or

Ethernet Switch

Communication

Network

MC

C






Communication Network:- Communication network of NDPL is through Optical Fiber network. There are total 6 nos. of OF rings. The network is designed in ring shape to increase the redundancy of the network.If there is OF cut on one side the router can communicate through other side of the ring network. There is one core ring network which communicates to Master Control Centre.

SCADA Servers :-

There are 3 sets of servers available with SCADA 1. TCI (Tele Communication Interface)2. RTC ( Real time communication)3. IM ( information Management ) 4. UI(User Interface)

TCI (Tele Communication Interface):- TCI is the first end communicator with field device (Data Concentrator). TCI converts the communication address of the information into Technical Address of SCADA system.There two TCI links connected with each grid sub station. The two links are hot stand by of each other TCI capture the raw data, event reported from field

RTC ( Real time communication)







RTC is the real time server where real time processing is carried out. All calculations, formula etc. are defined in RTC. Scaling of the raw data is done in RTC.

IM ( information Management ) IM server is information storage server. All the data storage is done in IM . all analog , digital data , event , alarms were get stored in IM.

UI(User Interface) UI is the monitor on which the SCADA system is operated. It is man-machine interface for remote operations from SCADA System.

Each server has its hot standby server hence if there is failure of one server, the slave server will take over automatically

Backup Control Centre :-

A stand-alone BCS, located remotely from the MCS in the Backup Control Center (BCC), shall be provided

to perform SCADA/DMS functions upon catastrophic loss of the SCADA/DMS. The BCS hardware and

software technology shall be the same as the SCADA/DMS such that the incremental maintenance costs

for hardware, software, database, display, and report updates and training are minimized.

BCC is visited monthly with automation for checking of BCC

Mock Drill of BCC is conducted annually in presence of automation.







3.1.2 SCADA OPERATION OVERVIEW:- 33kV/66kV/11kV electrical equipment operations are carried out remotely from SCADA. 52 Nos. of grid substation are unmanned and remotely operated.For Detail operation through SCADA refer the presentation uploaded in Sanchay

> Reference Folder > Operation and Maintenance > Power System Control > Internal Training>SCADAFUNCTION

Operation Manual is also available in Sanchay

> Reference Folder > Operation and Maintenance > Power System Control > SCADA>SCADA Operator Manual


LIN

K

http://pdc-srv-moss:1500/Public%20Folder/Forms/New_Reference.aspx?View=%7B3A091F2A-D113-4D92-BF4B-7CF36C0CB93A%7D

http://pdc-srv-moss:1500/Public%20Folder/Forms/New_Reference.aspx?RootFolder=%2FPublic%20Folder%2FOperation%20and%20Maintenance%2FPower%20System%20Control&View=%7B3A091F2A-D113-4D92-BF4B-7CF36C0CB93A%7D


http://pdc-srv-moss:1500/Public%20Folder/Forms/New_Reference.aspx?RootFolder=%2FPublic%20Folder%2FOperation%20and%20Maintenance&View=%7B3A091F2A-D113-4D92-BF4B-7CF36C0CB93A%7D










3.2 DMS OVERVIEW:-

3.2.1 DMS CONFIGUATION OVERVIEW:-

Distribution management System is basically network of 11kV & below equipment. DMS is static view of the network. 11kV & below network is not remotely control and monitored through DMS.Network is manually updated after any change over at site.

Advantage of DMS:- • Centralized monitoring & remote operation of 11kV Switching Stations through Central DMS

system.• Faster identification of faults.• Faster restoration of supply from remote.• Minimize “Un-served Energy”.• Improves reliability of the network by reducing the outage timing.

3.2.2 DMS NETWORK OVERVIEW







Network overview of the DMS:-







3.3 DA OVERVIEW:- 3.3.1 DA CONFIGUATION OVERVIEW:-

DA basically serves the same purpose as Substation Automation does for SCADA. Within this project the 11 kV/440V substations will be automated. These substations are chosen for Automation based on the study done by the NPAG group. Within these substations some of the Ring Main Unit legs will be automated. Fault Passage indicators will also be automated for quicker identification of faults.







Communication interface equipment (GPRS) on Built-in IEC 60870-5-104 port on RTU and M2M System for the Secure Communication over Public GPRS Network

FPI Monitoring Units (Location where FRTU’s not installed) with communication interface equipment (GPRS)

Data Concentrator for Data Collection from FRTU’s and Integration of Data with NDPL Existing SCADA

Operation Manual is also available in Sanchay

> Reference Folder > Operation and Maintenance > Power System Control > SCADA>Distribution Automation

CHAPTER-4 FIELD VISIT31 | P a g e

Property of NDPL – Not to be reproduced without permission of NDPL










Field visit is mandatory thing to operate NDPL network through SCADA.All 33kv/66kv/11kv electrical equipment were operated through SCADA remotely hence detail of the equipment need to be known.Duration for field visit is different for different categories:-

Description DurationNewly joined without experience (Fresher ) 1 Month With Non-Technical experience from NDPL or Outside NDPL

15 Days

With Technical experience from NDPL & Outside NDPL

5 Days

Field visit is divided in two parts:- Grid Visit (33kV or 66kV Grid) Zone Visit

Grid Visit (33kV or 66kV Grid):- As you are aware of the NDPL network stature, there are few things need to be observed during grid visit.There is different network arrangement for 33kV & 66kV grid sub stations. The sequence of electrical equipment in SLD of the stations

Critical points to be observe:-

General:- a. Highest voltage that can be applied on 66kV, 33kV, 11kV, 6.6kVb. Earthing of switchgear, transformer, switchyard, control panelc. Classification of HT & EHT as per IE Rules

Power Transformer :- a. The vector of a 33/11kV or 66/11kV transformerb. Percentage impedance of 33/11kV or 66/11kV transformerc. Cooling arrangement d. Accessories and their functionse. Function and indication of Buchholz Relayf. Function of OSRg. Function of PRV and indication i. Marshalling Boxj. DM Boxk. Class of insulationl. Function of OLTCm. Functions of TMUn. Cap-on-tapo. Significance and construction of OTI/WTI







p. Transformer Oil and its basic test

Switchgear:- a. Compartments of indoor switchgear & their significanceb. Safety measures for working in each compartment of indoor panelsc. Bus-PT, Circuit-PT SLD of indoor panelsd. Layout of outdoor switchgeare. Function of Lightening Arrestorsf. Rating (voltage. kA) of Lightening Arrestorsg. Types of 33kV and 66kV isolators

Capacitorsa. SLD of Capacitor Bankb. Significance of Neutral CTc. Efficacy curved. Timer in Closing circuit - its significance

Battery Charger:- a. Function of Batteryb. What action to take if battery drains offc. Types of charging available in Battery Chargerd. How to identify DC earth

Zone Visit :- Zone is distribution system with DT (Distribution Transformer) 11kV/440V. As discuss earlier there are total 47 nos. of zone where whole NDPL area is distributed.

Critical points to be observe:-

General:- a. PPEs and their usageb. Number of Zones, Districts and Circles and their significance

RMU:- a. Different types of RMUs and their SLDsb. Indications on RMUs

Network:- a. Types of cables b. Types of insulatorsc. Rating of LAd. Types of DTs

Protection Visit







Person will visit protection department for 1 day with Manager of protection regarding fault & tripping indications etc.

Automation Visit:- Person will visit automation department for 1 day with Manager of automation regarding SCADA, DMS & DA etc.

CHAPTER-7 PSC Questionnaire34 | P a g e







A. For new comer joined with no experience :-

After completion of field visit, Seekh session should be given by person to at least 4-5 persons of PSC. There will be interactive session with PSC manager

B. With Technical or Non-Technical experience from NDPL or Outside NDPL:-

After learning all chapters till 5, PSC manager will have small questionnaire.The sample of the questionnaire is given below:-

Sl. No.

Question (YES) & X (NO)

Weightage

GRID VISIT 25%1 General: a. Highest voltage that can be applied on 66kV, 33kV, 11kV, 6.6kV b. Earthing of switchgear, transformer, switchyard, control panel c. Classification of HT & EHT as per IE Rules 2 Power Transformer:- a. The vector of a 33/11kV or 66/11kV transformer b. Percentage impedance of 33/11kV or 66/11kV transformer c. Cooling arrangement d. Accessories and their functions e. Function and indication of Buchholz Relay f. Function of OSR g. Function of PRV and indication h. Type of neutral earthing i. Marshalling Box j. DM Box k. Class of insulation l. Function of OLTC m. Functions of TMU n. Cap-on-tap o. Significance and construction of OTI/WTI p. Transformer Oil and its basic test 3 Switchgear:- a. Compartments of indoor switchgear & their significance b. Safety measures for working in each compartment of indoor panels c. Bus-PT, Circuit-PT SLD of indoor panels d. Layout of outdoor switchgear e. Function of Lightening Arrestors f. Rating (voltage. kA) of Lightening Arrestors g. Types of 33kV and 66kV isolators 4 Capacitors:- a. SLD of Capacitor Bank b. Significance of Neutral CT c. Efficacy curve d. Timer in Closing circuit - its significance 5 Battery & Battery Charger:-







a. Function of Battery b. What action to take if battery drains off c. Types of charging available in Battery Charger d. How to identify DC earth

ZONE VISIT 25%

1 General a. PPEs and their usage b. Number of Zones, Districts and Circles and their significance 2 RMU a. Different types of RMUs and their SLDs b. Indications on RMUs 3 Network a. Types of cables b. Types of insulators c. Rating of LA d. Types of DTs

PROTECTION 25%

1 Protection of Power Transformer 2 Protection of 11kV feeder 3 Protection of 33kV or 66kV radial feeder 4 Protection of HT or EHT Capacitor Bank 5 Protection of 33kV or 66kV parallel feeders 6 Bus-Zone protection

7Primary and back-up protection of 33kV and 66kV bus bars connected to exchange feeders

8 Distance Protection and its zones 9 Calculating fault level of 66kV, 33kV and 11kV systems

general 25%

1 Normal Operating Condition (NOC) of NDPL Network 2 PTW guideline for sub transmission and distribution system 3 All IMS Process of PSC 4 Demonstrate Flash Report entries for: a. Sub-Transmission outage with energy loss b. DLR c. UFR d. Shedding due to O/L at NDPL end e. Shedding due to O/L at DTL end







f. Pending List updation

CHAPTER-5 Simulator Training NDPL load management is core responsibility of PSC. There are standard procedure followed for operations carried out for load management







BASIC GUIDELINE FOR OPERATIONS:-1. There is approximation for calculation of power in MW

Voltage Current In amp Power in MW 11kV 60 133kV 20 166kV 10 1

2. Line Outage is always given from sending end 3. Operations for line outage are always done from receiving end and earthing is done from sending

end.4. Overhead line is tried once after tripped on O/L and Underground circuit were not tried 5. 33kv/11kV Bus Bar outage will be issued only after circuit breaker were racked out.6. Protection indication

LO Setting Overload setting of the line 120% of nominal current in 60 secHigh Set Fault CurrentIDMT Inverse Differential Minimum time Relay

5.1 Sub transmission System through SCADA:-

1. Power flow from each 220kV grid substation to NDPL grid Power flow from 220kV grid to NDPL grid demonstrated through drawing

Drawing of 220kv Narela, Rohini, and Kanjawala etc.2. Drawing of SLD of any grid substation and explain the bay equipment arrangement, Bus

arrangement etc.

3. Load management is basically divided in Two part;- Scheduled shutdowns Unscheduled system outages

Scheduled shutdowns:-

As mention earlier, there is outage management carried out for sub transmission and distribution system.

Shutdowns were given (issue PTW) to working party after filling NOP (Normal operating Procedure).

Simulation of following planned outage will be done in various grid substations:-

1. BAY ALONGWITH LINE OUTAGE ( Indoor & Outdoor )

2. BAY ALONGWITH LINE OUTAGE(RECEIVING & SENDING END INDOOR SWITCH GEAR )

3. POWER TRANSFORMER BAY OUTAGE ( Indoor & Outdoor )

4. 66/33kV BUSBAR OUTAGE (OUTDOOR & INDOOR)


http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Local%20Settings/Temporary%20Internet%20Files/Content.MSO/881BAC7D.xls#'66_33kV%20BUSBAR%20(0)'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Local%20Settings/Temporary%20Internet%20Files/Content.MSO/881BAC7D.xls#'PTR_PTR%20BAY%20(O)'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Local%20Settings/Temporary%20Internet%20Files/Content.MSO/881BAC7D.xls#'LINE_BAY%20AW%20LINE_BAY%20(REC.%20ID)'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Local%20Settings/Temporary%20Internet%20Files/Content.MSO/881BAC7D.xls#'LINE_BAY%20AW%20LINE_BAY%20(O)'!A1






5. 66/33kV BUS COUPLER (OUTDOOR & INDOOR)

6. 66/33/11kV CAPACITOR BANK OUTAGE

7. 33/66 kV BUS PT OUTAGE

8. 33kV BUS SECTION (OUTDOOR)

9. 11kV HALF BUSBAR OUTAGE

10. 11kV BUS SECTION OUTAGE

11. 11kV LOCAL/STATION TRANSFORMER OUTAGE

12. 11kV OUTGOING FEEDER OUTAGE

NOP check list is available in Sanchay.During DTS training, take the print out of respective NOP.

> Reference Folder > Operation and Maintenance > Power System Control > Internal Training> Normal Operating Procedure for planned shut downs

During filling up the NOP, Changeover, load transfer etc, ref.No. is issued to working party as all the operation were done then ref. no. is converted into PTW no.

PTW is issued to authorize person only. Tagging list for the persons who are authorized to issue and to receive PTW is uploaded in sanchay

> Reference Folder > Operation and Maintenance > Power System Control > Tagging List

Unscheduled system Interruptions :-

Unscheduled System Outages includes emergency shutdown, Break downs, protection tripping etc.

There are various types of unscheduled shut downs:-

UPSD (Unplanned Shutdowns) :-

This shut downs are not planned weekly however includes project work, automation work, Bird Nests removal, Oil Leakage from Power Transformers etc. UPSD is given only if the load management is possible. Load shedding for UPSD is not recommended.

ESD(Emergency Shutdown) :- These shutdowns include emergency condition for network restoration and need to be attended urgently.








http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Local%20Settings/Temporary%20Internet%20Files/Content.MSO/881BAC7D.xls#'11%20kV%20OUTGOING%20FEEDER'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Local%20Settings/Temporary%20Internet%20Files/Content.MSO/881BAC7D.xls#'11%20kV%20LOCAL%20TRAMSFORMER'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Local%20Settings/Temporary%20Internet%20Files/Content.MSO/881BAC7D.xls#'11%20kV%20BUS%20SECTION'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Local%20Settings/Temporary%20Internet%20Files/Content.MSO/881BAC7D.xls#'11kV%20HALF%20BUSBAR'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Local%20Settings/Temporary%20Internet%20Files/Content.MSO/881BAC7D.xls#'33%20kV%20BUS%20SECTION%20(O)'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Local%20Settings/Temporary%20Internet%20Files/Content.MSO/881BAC7D.xls#'33_66%20kV%20BUS%20PT'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Local%20Settings/Temporary%20Internet%20Files/Content.MSO/881BAC7D.xls#'CAPACITOR%20BANK'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Local%20Settings/Temporary%20Internet%20Files/Content.MSO/881BAC7D.xls#'66_33%20kV%20BUS%20COUPLER%20(O)'!A1






OSD (Opportunity Shutdown):-This shutdown is availed when third party is working on the same equipment /line . The line is under breakdown etc.

CSD (Compensatory Shutdown):-The request for the shutdown is refused for any reason then another shutdown is availed for its compensation

BD (Breakdown) :-The interruption on any electrical equipment or line due to protection system operated in counted as BD. Breakdown leads to load shedding if the load management is not feasible.

SF (Supply Fail) :-Supply Fail is the one kind of breakdown only. However the breakdown of 220kV/440Kv electrical equipment of DTL. Breakdown of DTL equipment cause supply failure of NDPL network in counted as SF. The breakdown is listed on account of DTL.

Shutdowns were given (issue PTW) to working party after filling EOP (Emergency Operating Procedure).

Simulation of following interruption will be done in various grid substations:- 1. 33/66KV O/H LINE BREAKDOWN.( FOR PARALLEL CIRCUIT ) FOR TRIPPING OTHER THAN

OVERLOADING2. 33/66KV O/H LINE BREAKDOWN. ( FOR PARALLEL CIRCUIT ) FOR ONE CIRCUIT TRIPPING ON E/F &

OTHER ON OVERLOADING

3. 33/66KV O/H LINE BREAKDOWN( RADIAL ON OVERLOADING OR OTHER )

4. 33/66KV U/G CABLE CIRCUIT BREAKDOWN ( ON EARTH FAULT )

5. TRIPPING OF POWER TRANSFORMER ON OVER LOAD /DIFFERENTIAL TRIP

6. POWER TRANSFORMER TROUBLE (OTI/WTI/buchol )

7. 33/66KV BAY EQUIPMENT (BREAKER, CT, ISOLATOR) FLASHOVER/RAPTURE.

8. 66/33/KV BUS BAR BREAKDOWN/ FLASHOVER.

9. 11KV BUS BAR BREAKDOWN/ FLASHOVER.

10.33/66KV STRUCK BKR CONDITION : LINE BREAKER (INDOOR & OUTDOOR SWITCHGEAR )

11. 33/66KV STRUCK BKR CONDITION :BUS COUPLER/BUS SECTION OUTDOOR SWITCHGEAR

12. 11KV STRUCK BKR CONDITION :INCOMER/ BUS SECTION/ GOING FEEDER INDOOR SWITCHGEAR

EOP check list is available in Sanchay.During DTS training, take the print out of respective EOP.

> Reference Folder > Operation and Maintenance > Power System Control > Internal Training> Emergency Operating Procedure for planned shut downs





http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#'11kv%20Struck%20bk%20Icomerr'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#'3366kV%20Struck%20bkr%20Bus%20coupler.'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#'3366kV%20Struck%20bkr%20Line(O)'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#'11KVBUS%20BAR%20BD'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#'6633KV%20BUS%20BAR%20BD)'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#'BAY%20BD'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#'TR.%20TROUBLE'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#'Transf.%20BD'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#'UG%20CABLE%20CKT%20BD%20%20%20'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#RANGE!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#'OH%20LINE%20BD%20PARALLEL(%20BOTH)'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#'OH%20LINE%20BD%20PARALLEL(%20BOTH)'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#'OH%20LINE%20BD%20PARALLEL'!A1

http://pdc-srv-moss:1500/Local%20Settings/Documents%20and%20Settings/sujata.guruji/Desktop/IMS/Process/PST-P-12_Internal%20Training/Emergency%20%20Operating%20Procedure.xls#'OH%20LINE%20BD%20PARALLEL'!A1






During filling up the EOP, Changeover, load transfer etc, ref.No. is issued to working party as all the operation were done then ref. no. is converted into PTW no.

5.2 Distribution System:-

Load management is basically divided in Two part;- DMS Distribution system outages

1. Overview of Distribution Management System through DTS2. Alarm categories for DMS & DA and signification of each alarm 3. Colour topology for manual update, remotely operated etc. 4. Action points after receiving FPI alarms 5. Application of trace , jumper Cut Ground in DMS 6. Process of back feeding through DMS

Operational philosophy is available in sanchay

> Reference Folder > Operation and Maintenance > Power System Control > Internal Training> Operational philosophy for DMS










CHAPTER-8 Entry in Flash report/PTW/GD register

7.1 GD/PTW Registers entry:-

All activities during load management will be entered in PTW and GD registers.

During DTS training session, Take the print of sample GD/PTW register and demonstrate the entry

Enter the all detail of PTW issued during training in DTS for SOP.

Sample GD & PTW register is uploaded in Sanchay

> Reference Folder > Operation and Maintenance > Power System Control > REGISTER FORMAT

7.2 Flash Report Entry:-

All the details of Load Shedding, interruption to be enter in flash report software.

Enter the all detail of PTW issued during training in DTS for SOP in flash report software

Presentation for entry in flash report in uploaded in sanchay:-

> Reference Folder > Operation and Maintenance > Power System Control > Internal Training >Flash report Entry















CHAPTER-9 Preparation of MIS As discussed in Chapter-1, there are various MIS send daily from PSC

Prepare the all Daily MIS as dummy report

Kindly prepare operational summary, flash report and ABT report

Work instruction for the preparation of report is uploaded in sanchay

> Reference Folder > Operation and Maintenance > Power System Control > Internal Training >

INTERRUPTION MATRIX

NATURE OF INTERRUPTION SUB-INTERRUPTION ENTRY IN FLASH REPORT

ON ACCOUNT OF

NDPL/DTL/BSES

SUPPLY FAIL

100MVA POWER TRANSFORMER

Each exchange circuit TRANSCO

440kV TRANSMMISION LINE Enter 440KV line name in equipment and Each 220kV DTL grid exchange with NDPL in remark

TRANSCO

Equipment fault at 220kv grid affecting supply of NDPL grid

Respective exchange circuit TRANSCO

BREAK DOWN

CB at 220kv grid substation tripped due to line fault Respective exchange circuit NDPL

Tripping of any equipment at NDPL grid substation

Respective equipment at grid sub station

NDPL

CB at NDPL grid substation tripped due to BSES line fault

Respective equipment at grid sub station BSES

CB at BSES grid substation tripped due to NDPL line fault


NDPL

Equipment/CB fault at BSES grid affecting supply of NDPL grid

Respective equipment at grid sub station BSES

Equipment/CB fault at NDPLgrid affecting supply of BSES grid


NDPL

CHAPTER-10 Real time Monitoring 43 | P a g e











A. For actual drawal :- As mention in 1.2 chapter, Intra state ABT is implemented in Delhi from April 2007Overdrawal of power from grid needs to be monitored

UNDER DRAWAL:- UI rate shall be capped at 403 paisa per kWh for under drawls by buyer or beneficiaries in excess of 10% of schedule or 250MW (whole Delhi) whichever is lessOver DRAWAL:-

The over-drawal of electricity by any beneficiary or a buyer during a time-block shall not exceed 12% of the scheduled drawal of such beneficiary or buyer or 150 MW (whichever is lower), and 3% on a daily aggregate basis, for all the time blocks when frequency is below 49.7 Hz.

Additional UI chargers for over drawal of electricity for each time block when the grid frequency is below 49.5 Hz and above 49.2Hz (49.5-49.2) shall be 40% of max. UI charger 873 paisa per kWh

Total UI charges for O/D between 49.5-49.2 shall be 12.22 Rupees per kWh Additional UI chargers for over drawal of electricity for each time block when the grid

frequency is below 49.2 Hz shall be 100% of max. UI charge 873 paisa per kWh Total UI charges for O/D below 49.2 shall be 17.46 Rupees per kWh

NDPL O/D AND U/D is monitored through delhisldc website:-

There should not be overdrawing below 49.5 to control power purchase cost of NDPL.


NDPL O/D and U/D






If there is overdraw of more than 20MW below 49.5 Hz for more than five minute then DLR should be start with concern of shift manager

B. For Reactive drawal :- As per new UI reactive regulation

a) If we draw reactive power below 97 % voltage at exchange point Payable charges 10 paise /reactive unit (kVARh)

b) If we pump reactive power below 97 % voltage at exchange point Receive charges 10 paise /reactive unit (kVARh)

c) If we draw reactive power above 103% voltage at exchange point Receive charges 10 paise /reactive unit (kVARh)d) If we pump reactive power above 103% voltage at exchange point

Payable charges 10 paise /reactive unit (kVARh)

Between 97% to 103% voltage at exchange point if pump or draw reactive power - No charges

Base on new guidelines 66 & 33 kV capacitor banks are to be controlled manually switching on & off based on voltage at exchange point from SCADA.11 kV Shunt capacitor banks are controlled by Cap-On -Tap 66 kV Cap BanksBadli - Exchange point is 220 kV Narela at Badli or 220 kV Rohini at RG-6DSIDC-1 - Exchange point is 220 kV Narela at Narela A-7Jahangirpuri - Exchange Point is 220 kV Narela at JHPRG-6 - Exchange point is 220 kV Rohini at RG-6 or 220 kV Narela at BadliRG-23 - Exchange point is 220 kV Rohini at RG-24MGP-2 - Exchange point is 220 kV Rohini at RG-4 or 220 kV Rohini at RG-24PP-1 - Exchange point is 220 kV Rohini at RG-433kV Cap banksInderpuri - Exchange point is 220 kV Naraina at InderpuriJHP 1 &2 - Exchange Point is 220 kV Narela at JHP or 220 kV Gopalpur at JHP

CHAPTER-10 Authorization Interview45 | P a g e







As per PTW guideline the final interview will be held with HoG (PSC) for authorization to issue PTW in sub transmission& distribution

Overview of the question in interview is given below:- General:-

Flash Report:a. Reliability Indices: i. Meaning of SAIDI, SAIFI, CAIDI ii. IEEE guidelines for measurement of SAIDI, SAIFI, CAIDI iii. How SAIDI, SAIFI, CAIDI are calculated in Flash Reportb. Different forms of load-shedding and how they are captured in the reportc. Meaning of PSD, ESD, UPSD, BD in Distributiond. Meaning of PSD, ESD, UPSD, BD in Sub-Transmissione. Mechanism for entry for outages/BDs continued to next datef. Mechanism for capturing and updating Pendancy of lines/equipmentg. Process for final checking of Flash Reporth. 11kV Back-feeding process & MISPSC IMS Processes:The process of conducting DLRThe process of conducting ISLSReactive Energy control:a. Why it is necessaryb. How is it doneMost important consumers of NDPL. How their interest is protected.Role of Call Centre BSES grids from which NDPL 11kV feeders emanateDTL grids from which NDPL 11kV feeders emanate

SCADA:- Types and significance of alarm lists Demonstrate filtration of data from alarm lists Demonstrate data retrieval of data from archives, from SAP, from

Crystal Reports Demonstrate usage of different types of tags Demonstrate steps for operating CBs Demonstrate manual updating of CBs, isolators Demonstrate usage of Tags Load Shedding Module usage

Sub transmission:-

1 Steps for outage of a radial line

2 Steps for outage outage of one out a parallel set of lines

3 When is it necessary to open the busbar isolators when providing line outage







3 Steps for outage of a Power Transformer

4 Steps for outage of 11kV busbars in steps

5 Steps for outage of 33kV busbars in steps

6 Steps for restoration after transient fault in 33kV or 66kV line

7 Steps for restoration after a sustained fault in 33kV or 66kV line

8 Steps for restoration after a cable fault in 33kV or 66kV line

9 Steps for outage of a EHV or HV Capacitor Bank

10 Updation process in SCADA for exchange feeder outage at DTL end

11 Definition of PSD, UPSD, ESD and BD

12 Demonstrate Flash Report entries for:

a. Sub-Transmission outage with energy loss

b. DLR

c. UFR

d. Shedding due to O/L at NDPL end

e. Shedding due to O/L at DTL end

f. Pending List updation

13 Paralleling of Lines:

a. Why is it done

b. Where is it done

14 Paralleling of Power Transformers:

a. Why is it done

b. Where is it done

The person will be added in tagging list of Level-2 and continue to do operations.The person will be in parallel with sub transmission operation for 4-5 days and then can start independent operation

CHAPTER-11 Overview of SA-8000 & TBEM47 | P a g e







TBEM:-

Tata Business Excellence Model Based on the United States’ Malcolm Baldridge National Quality Award.It was adopted across TATA Group Companies

A systemic approach to Performance Management- To meet and exceed the expectations of all stakeholders Through process centric and results focused approaches

Tata Business Excellence Model (TBEM) is the basis for conducting organizational self-assessments andfor giving feedback to applicants. In addition, the Criteria have three important roles in strengtheningCompetitiveness:

to help improve organisational performance practices, capabilities, and results to facilitate communication and sharing of information on best practices among organisations of all

types to serve as a working tool for understanding and managing performance and for guiding organisational

planning and opportunities for learning

Presentation is uploaded in ndpl-o-pedia > Reference Folder > Operation and Maintenance > Power System Control > Internal Training >

CHAPTER-12 Training Report











Training Report Sr.No.

DetailYES/NO

( Mention the date)Target

1 Name ( Mr. / Ms) :-

2 EMP NO:-

3 Designation :-

4 Training Start Date

5 Employee Detail received

6 GRID Visit

7 Zone & Protection Department Visit

8Question answer session with Manager (PSC)

9 Sub transmission SCADA operation

10 DMS & DA training through DTS

11Inclusive in Primary Tagging List of Distribution

12 Training End Date

13

Authorization for 1. Internet Sites (14 Nos)2. Mail to Group ID3. NDPL-O-PEDIA4. FLASH REPORT & ABTS5. SCADA ID6. To include name in PSC

Group ID7. Mail from PSC MIS ID8. SAP(Outage & Notification)

14

Remarks

The training should be completed in specific period mention for each category:-

CATOGORY Duration breakup Total







Duration(Working Days)

Newly joined without experience (Fresher )

1 Month = field visit ( zone & Grid )15 Days = internal training process

1.5 Month

With Non-Technical experience from NDPL or Outside NDPL

15 Days = field visit ( zone & Grid )10 Days = internal training process

25 Days

With Technical experience from NDPL & Outside NDPL

5 Days = field visit ( zone & Grid )10 Days = internal training process

15 Days

Abbreviation used

Abbreviation DescriptionDVB Delhi Vidyut Board DTL Delhi Transmission Ltd.

SLDC State Load Dispatch CentreNRLDC Northern Region Load Dispatch Centre

ABT Availability based Tariff







PPA Power Purchase Agreement DERC Delhi Electricity Regulatory Commission CERC Central Electricity Regulatory Commission

SCADA Supervisory Control And Data Acquisition DMS Distribution management SystemDA Distribution Automation

CENNET Centre for Network management CENPEID Centre for Power Efficiency in distribution

PM-05 Preventive Maintenance to be enter in SAP by MPG PM-03 Predictive Maintenance to be enter in SAP by respective GC SAP SYSTEMS, APPLICATIONS, PRODUCTS IN DATA PROCESSINGMPG MAINTENANCE PLANNING GROUP

UI Unscheduled Interchange PMG Power Management Group PTW Permit To WorkGIS Geographical Information System SLD Single Line DiagramMCC Master Control CentreBCC Backup Control Centre HT High Tension

EHT Extra High TensionOTI Oil Temperature IndicatorWTI Winding Temperature Indicator

OLTC Online Tap ChangerTMU Transformer Monitoring Unit DT Distribution Transformer

RMU Ring main Unit LA Lightning Arrester

DTS Dispatcher Training Simulator GD General Diary


psc

Documents

jayanta chatterjee

normal operating

os bcus

customized

reference

dt lt main

draw reactive

reliable data