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WELCOME TO SHRI A. MANGLIK EXECUTIVE DIRECTOR. POWER GRID CORPORATION OF INDIA LIMITED. SOUTHERN REGIONAL LOAD DESPATCH CENTRE. PRESENTATION OVERVIEW. GRID OPERATION – AN OVERVIEW GRID OPERATION – TYPICAL ISSUES IN THE PAST GRID OPERATION - PRESENT STATUS

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WELCOME

TO

SHRI A. MANGLIK

EXECUTIVE DIRECTOR

POWER GRID CORPORATION OF INDIA LIMITED

SOUTHERN REGIONAL LOAD DESPATCH CENTRE


Presentation overview
PRESENTATION OVERVIEW

  • GRID OPERATION – AN OVERVIEW

  • GRID OPERATION – TYPICAL ISSUES IN THE PAST

  • GRID OPERATION - PRESENTSTATUS

  • OPEN ACCESS – REGULATIONS BY CERC

  • SHORT TERM OPEN ACCESS – EXPERIENCE SO FAR

  • SHORT TERM OPEN ACCESS – CASE STUDIES

  • OPEN ACCESS – CHALLENGES AND TASKS AHEAD



Regional grids quick facts
REGIONAL GRIDSQUICK FACTS


REGIONAL GRIDS

INSTALLED CAPACITY

NORTHERN :- 33,782 MW

EASTERN :- 16,681 MW

SOUTHERN :- 34,743 MW

WESTERN :- 33,162 MW

NORTH-EASTERN :- 2,444 MW

TOTAL 1,20,812 MW

NORTHERN REGION

NORTH-EASTERN REGION

EASTERN REGION

WESTERNREGION

SOUTHERN REGION


ELECTRICAL’

REGIONS

1

NORTHERN REGION

NORTH-EASTERN REGION

EASTERN REGION

2

WESTERNREGION

3

SOUTHERN REGION

SAME FREQUENCY FROM GUJARAT TO ARUNACHAL PRADESH WITH EFFECT FROM MARCH 2003

ABOUT 2800 KMS! APART


ELECTRICAL’

REGIONS

NORTHERN REGION

1

NORTH-EASTERN REGION

EASTERN REGION

WESTERNREGION

2

SOUTHERN REGION

WITH THE COMMISSIONING OF THE TALA PROJECT CONNECTING THE EASTERN AND NORTHERN GRIDS, INDIA WILL HAVE ONLY TWO GRIDS




Southern region geography

ANDHRA PRADESH

KARNATAKA

TAMIL NADU

KERALA

SOUTHERN REGION – GEOGRAPHY

POPULATION :- 22.5 CRORES ( 22% OF INDIA)

AREA :- 651 (‘000 SQ KM)(19% OF INDIA)

INSTALLED CAPACITY:- 33,162 MW(27.6%)

WEATHER :- South-west monsoon

North-east monsoon

SEA COAST :- AROUND 4000 KM


Growth of installed capacity of sr
GROWTH OF INSTALLED CAPACITY OF SR

IN MW

Average Growth ~ 5 %


Installed capacity in sr as on 30 11 05
INSTALLED CAPACITY IN SR as on 30-11-05

The above capacity does not includes

--- About 1342 MW of Wind Mill Capacity in Tamil Nadu.

--- Micro and Captive plants in different states.


SOURCE-WISE INSTALLED CAPACITY OF SR

IN MW

OTHERS

WIND

NUCLEAR

HYDRO

GAS

THERMAL

33,162 MW


Generating units in southern region
GENERATING UNITS IN SOUTHERN REGION

A.P

TYPICAL

GENERATOR

SPREAD

IN SR

KAR

- HYDRO

- THERMAL

KER

TN

GENERATORS ABOVE 1000 MW

- GAS / NAPTHA

GENERATORS 500 – 1000 MW

- NUCLEAR

GENERATORS BELOW 500 MW


TYPICAL

LOAD

SPREAD

IN SR

LOAD 500-1200 MW

LOAD 200-500 MW


Typical load curve of sr
TYPICAL LOAD CURVE OF SR

SUMMER

EVENING PEAK

WINTER

MONSOON

WEATHER

RESERVOIR

CONSUMPTION


Grid operation typical issues in the past
GRID OPERATIONTYPICAL ISSUES IN THE PAST


Grid operation typical issues in past
GRID OPERATION – TYPICAL ISSUES IN PAST

  • LOW / HIGH FREQUENCY PROBLEMS

    • FREQUENCY EXCURSES TO LOW/HIGH VALUES

  • LOW / HIGH VOLTAGE OPERATION

    • CRITICALLY LOW VOLTAGES AT LOAD CENTRES

    • SUBSTANTIALLY HIGH VOLTAGES AT FAR ENDS

  • SYSTEM BROWNOUTS / BLACK OUTS

    • SEPERATION OF SYSTEMS / LOSS OF LOAD

  • ECONOMIC IN-STABILITY / INCREASED ELECTRICAL LOSSES

    • UNRELIABLE / INEFFICIENT OPERATION OF EQUIPMENT

...THE END RESULT :


Grid operation a tight rope walk
GRID OPERATION: A TIGHT ROPE WALK

POWER

SWINGS

INSTABILITY

INCREASED

LOSSES

BLACK-OUT

IN-ECONOMIC

OPERATION

VOLTAGE

COLLAPSE



Grid operation present status
GRID OPERATION –PRESENT STATUS

  • STABILISED SYSTEM FREQUENCY

  • IMPROVED VOLTAGES

  • MERIT ORDER OPERATION

  • INTER REGIONAL EXCHANGES

  • IMPROVED GRID SECURITY


Grid present status cardinal events
GRID PRESENT STATUSCARDINAL EVENTS


Grid present status cardinal events1
GRID PRESENT STATUS -- CARDINAL EVENTS

UI

  • AVAILABILITY BASED TARIFF

  • UNIFIED LOAD DESPATCH SCHEME

  • GENERATION ADDITION

  • INTERREGIONAL AC / HVDC LINKS

  • INTER REGIONAL EXCHANGES

  • OPERATIONAL EXCELLENCE

...THESE EVENTS CHANGED THE FACE OF GRID OPERATION


Monsoons
MONSOONS

SOUTH WEST MONSOON

NORTH EAST MONSOON


Stabilised system frequency
STABILISED SYSTEM FREQUENCY

  • TYPICAL FREQUENCY CURVE

  • FREQUENCY DURATION CURVE

  • RECORD FVI OF 0.04


Frequency profile
FREQUENCY PROFILE

2002, 2003&2004




COMPARISION OF BANGALORE VOLTAGE-TYPICAL DAY

2003

2004

BETTER VOLTAGE PROFILE MEANS LESS ELECTRICAL LOSSES

REALITY BITE:

FARMERS IN KARNATAKA ARE HAPPY WITH FEWER HOURS OF QUALITY POWER!!.

EFFICIENCY OF PUMPS AT TG HALLI WATER WORKS IMPROVED!

2002


ABOUT 16000 MW OF CAPACITY IS BELOW 300 Ps

ABOUT14200 MW OF CAPACITY IS BELOW 200 Ps

CUM. INS. CAP.

ABOUT 7000 MW OF CAPACITY IS BELOW 100 Ps




SHARP

PEAK

DEEP VALLEY

DEEP VALLEY


Kadamparai pump operation
KADAMPARAI PUMP OPERATION

SAVINGS OF RS 40 LAKHS EVERY DAY

INVESTMENT OF 1600 CRORES SAVED

GENERATOR MODE

PUMP

PUMP

THE PUMP MODE WAS NOT UTILISED SINCE INCEPTION!!!


Opportunistic ui trade
OPPORTUNISTIC UI TRADE

POWER EXPORT TO WR ON UI BASIS DURING LOAD CRASH

FREQ


Free governor mode of operation on 12 dec 04
FREE GOVERNOR MODE OF OPERATION ON 12-DEC-04

SHARAVATHI -1

FREQ DROP FROM 49.72 HZ TO 49.27 HZ i.e. ~ 0.45HZ


Free governor mode of operation on 12 dec 041
FREE GOVERNOR MODE OF OPERATION ON 12-DEC-04

SHARAVATHI -4

FREQ DROP FROM 49.72 HZ TO 49.27 HZ i.e. ~ 0.45HZ


Optimal reservoir utilisation sharavathy in karnataka
OPTIMAL RESERVOIR UTILISATIONSHARAVATHY IN KARNATAKA

THE COST OF GENERATION AT SHARAVATHY IS LESS THAN 20 Ps /UNIT

AVERAGE SELLING UI RATE OF KARNATAKA IS 372 Ps/UNIT

Rs.

Rs.

Rs.

Rs.

Rs.

Rs.

Rs.

Rs.

PLANT OPERATORS AT SHARAVATHY THINK OF THE RESERVOIR LEVEL IN RUPEES RATHER THAN IN FEET!!!

Rs.

Rs.

Rs.

Rs.

Rs.

Rs.

Rs.

Rs.


Growth of Inter Regional Energy Exchanges

25000

22500

20000

15000

13000

Total MU During The Year

9730

10000

8230

7350

5000

0

1999-2000

2000-2001

2001-2002

2002-2003

2003-2004

Year

IR Energy Exchanges


Reconciliation of ui accounts
Reconciliation of UI Accounts

  • 218 th Commercial Committee Meeting of SREB held on 06-12-2005

  • UI and Reactive Energy Charges Pool Accounts Payment and distribution for the year 2004-05 have been reconciled by all the constituents except AP.


Summary of ui 142wks from 01 jan 03 to 20 nov 05
SUMMARY OF UI – 142WKS(FROM 01/JAN/03 TO 20/NOV/05)


Ui in sr from 01 01 03 to 20 11 05
UI IN SR (FROM 01/01/03 TO 20/11/05)

  • TOTAL UI TURNOVER :- 10059 MU

  • TOTAL UI AMOUNT DISBURSED:- 1923 CR

  • AVG WEEKLY TRANSACTION:- 67 MU

  • AVG WEEKLY UI AMOUNT DISBURSED:- 13 CR



Inter regional exchanges details upto 151 wks till 20 11 05
INTER-REGIONAL EXCHANGES DETAILS UPTO 151 WKS (Till 20.11.05)

*from 06.09.04 (when ER exchanges computed @ respective frequencies)


MAJOR AND MINOR DISTURBANCES SINCE 1994

NO DISTURBANCES DESPITE LOSING ENTIRE SUPER GENERATING PLANTS LIKERAMAGUNDAM,VIJAYAWADA,KOTHAGUDEM, NORTH CHENNAI, SHARAVATHY ETC


SLDC

SLDC

SLDC

SUB LDC

SUB LDC

SUB LDC

RTU

RTU

RTU

Unified Grid Operation

National

Level

NLDC

Regional

Level

ERLDC

WRLDC

NRLDC

SRLDC

NERLDC

5 Nos.

State HQ

Level

32 Nos.

Group /

Distt Level

51 Nos.

Plant / Sub-

Station Level

1160

Nos.


Hierarchy of The ULDC Scheme in Southern Region

RLDC,Bangalore

SCC, Pondy

CPCC

Hyderabad

Kalamassery

Chennai

Bangalore

Andhra

Kerala

Tamilnadu

Karnataka

Bangalore

Hyderabad

Kalam’erry

Chennai

Lingusugur

Cuddapah

Kannur

Erode

Warangal

Trivandrum

Madurai

Hubli

Vijayawada


COMPLEXITY OF MONITORING

Integrated Opn

of Ten Power

Utilities

Annual Inter-Regional

Energy Transfer

≈10,000MU

Generators –Hydro,

Thermal,Gas/IPP

422 nos.

30,000 POINTS

Active Power, Reactive Power,

Voltage, Frequency, Transformer

Tap Position, Circuit Breaker Position, Isolator Position etc

Transmission

Network 400/220kV

≈ 40700 Ckm

Installed Capacity

≈32800 MW

Transformation

Capacity ≈

45000 MVA

Transformers

(220kV and above)

480 nos.

Dynamic Grid

Conditions


Talcher kolar schematic
TALCHER KOLAR SCHEMATIC

TALCHER

Electrode

Station

Electrode

Station

KOLAR

+/- 500 KV DC line

1370 KM

Kolar

400kv System

220kv system

Hosur

Hoody

B’lore

Chintamani

Salem

Madras

Cudappah

Udumalpet


Inter Regional Links

1650 MW

700 MW

1850 MW

900 MW

30,500 MW

2300

16,000

1200 MW

32,700 MW

1200MW

Present IR Capacity

= 9,500 MW

30,500 MW

2000MW


Inter regional transfer by end of 11 th plan 2012

NORTHERN REGION

13450 MW

4600 MW

NORTH-EASTERN REGION

6450 MW

1000 MW

WESTERNREGION

1300 MW

3200 MW

SOUTHERN REGION

INTER-REGIONAL TRANSFER BY END OF 11th PLAN (2012)

EASTERN REGION

30,000 MW OF INTER-REGIONAL POWER BY 2012



COMPARISION OF BANGALORE VOLTAGE-TYPICAL DAY

2003

2004

BETTER VOLTAGE PROFILE MEANS LESS ELECTRICAL LOSSES

(water supply to b’lore- next page )

REALITY BITE:

FARMERS IN KARNATAKA ARE HAPPY WITH FEWER HOURS OF QUALITY POWER!!.

EFFICIENCY OF PUMPS AT TG HALLI WATER WORKS IMPROVED!

2002


Water supply to bangalore
WATER SUPPLY TO BANGALORE

PUMPING LOSSES REDUCED

ENORMOUS SAVINGS TO THE STATE

MOTOR BURNING AND MAINTENANCE COSTS ALSO CAME DOWN DRASTICALLY

LOW VOLTAGE PROBLEMS AROUND BANGALORE HAMPERED WATER SUPPLY EARLIER

WITH BETTER VOLTAGE NOW, PUMPING EFFICIENCY HAS IMPROVED

400 KV STATION AT MYSORE BEING COMMISSIONED ON WAR FOOTING TO FURTHER FORTIFY THIS PART OF THE GRID


Frequency curve for 9 th september 2004
FREQUENCY CURVE FOR 9th SEPTEMBER 2004

FVI = 0.04

Avg Freq = 49.99Hz

10 * ∑ (F – 50) 2

FVI = -------------------------------

24 * 60




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