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SOUTHERN REGIONAL LOAD DESPATCH CENTRE

WELCOME TO K. SWAMINATHAN , CHAIRMAN K. SREERAMA MURTHY, MEMBER SURINDER PAL, MEMBER OF APERC, ANDHRA PRADESH 24 th June, 2005. POWER GRID CORPORATION OF INDIA LIMITED. SOUTHERN REGIONAL LOAD DESPATCH CENTRE. PRESENTATION OVERVIEW. SR GRID - QUICK FACTS

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SOUTHERN REGIONAL LOAD DESPATCH CENTRE

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  1. WELCOME TO K. SWAMINATHAN, CHAIRMAN K. SREERAMA MURTHY, MEMBER SURINDER PAL, MEMBER OF APERC, ANDHRA PRADESH 24th June, 2005 POWER GRID CORPORATION OF INDIA LIMITED SOUTHERN REGIONAL LOAD DESPATCH CENTRE

  2. PRESENTATION OVERVIEW • SR GRID - QUICK FACTS • OPEN ACCESS REGULATIONS – RECENT CHANGES • IMPACT OF CHANGES – CASE STUDIES • SHORT TERM OPEN ACCESS – EXPERIENCES • SCHEDULE – DRAWAL GRAPHS • REGULATORS ROLE - CPPs • STATE SECTOR – INTRASTATE ABT

  3. THANK YOU

  4. SOUTHERN REGIONAL GRIDQUICK FACTS

  5. REGIONAL GRIDS INSTALLED CAPACITY NORTHERN :- 31,230 MW EASTERN :- 17,697 MW SOUTHERN :- 32,734 MW WESTERN :- 32,354 MW NORTH-EASTERN :- 2,357 MW TOTAL 116,372 MW NORTHERN REGION NORTH-EASTERN REGION EASTERN REGION WESTERNREGION SOUTHERN REGION

  6. 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:- 32,734 MW(28.1%) PER CAPITA CONSUM. – 700 unit (A. I. – 567) WEATHER :- South-west monsoon North-east monsoon SEA COAST :- AROUND 4000 KM

  7. INSTALLED CAPACITY IN SR The above capacity does not includes --- About 1342 MW of Wind Mill Capacity in Tamil Nadu. --- Micro and Captive plants in different states.

  8. SOURCE-WISE INSTALLED CAPACITY OF SR IN MW NUCLEAR WIND/OTHERS HYDRO GAS THERMAL 32,734 MW

  9. GENERATING UNITS IN SOUTHERN REGION A.P TYPICAL GENERATOR SPREAD IN SR KAR - HYDRO - THERMAL KER TN GENERATING STATIONS ABOVE 1000 MW - GAS / NAPTHA GENERATING STATIONS 500 – 1000 MW - NUCLEAR GENERATING STATIONS BELOW 500 MW

  10. LOAD 500-1200 MW LOAD 200-500 MW

  11. TALCHER GRID MAP BHADRAVATI TYPICAL FLOWS ARE FROM NORTH TO SOUTH JEYPORE 178x2 SIMHADRI NTPC 2x221 8x4 RSTPP 400 KV LINE PRESENTLY OPERATED AT 220 KV SHORTLY WILL BE OPERATED AT 400 KV. GAZUWAKA(AP) 1 301x2 189 15x2 P 187 195 VISAKHAPATNAM (POWERGRID) 267x2 KHAMMAM HYDERABAD 317 P P 115 197x2 P MMDP 155 P VIJAYAWADA 146x2 221x2 258 RAICHUR NAGARJUNASAGAR P Nagjhari 279 172 ABOUT 12000 CKM 400KV TRANSMISSION 308 GRID FOCAL POINT SHIFTED TO KOLAR AFTER COMMISSIONING OF HVDC SSLMM MUNIRABAD P KODASAALY 277 52x2 KURNOOL KAIGA SIRSI 120 P N GOOTY CUDDAPAH 60 P DAVANAGERE 300 NELLORE 173 302 KADRA HIRIYUR 330 242 28 NELAMANGALA ALMATHI BANGALORE P MADRAS P KOLAR HOODY TALGUPPA HOSUR MAPS 182 181 63 175 PONDICHERY SALEM 54 P NEYVELI 179 151 164x2 UDUMALPET TRICHY QUANTUM CHANGES IN FLOW PATTERN LIKELY AFTER COMMISSIONING OF KOODANKULAM 2000 MW P 130x2 TRICHUR P P 127 130x2 P MADURAI PALLOM EDAMON THIRNELVALI KAYANKULAM 2x78 KOODANKULAM THIRUVANATHAPURAM

  12. TYPICAL LOAD CURVE OF SR EVENING PEAK SUMMER WINTER MONSOON

  13. SHARP PEAK DEEP VALLEY DEEP VALLEY

  14. GRID OPERATIONTYPICAL ISSUES IN THE PAST

  15. 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 :

  16. GRID PRESENT STATUS

  17. FREQUENCY DURATION CURVE 2002-03, 2003-04 & 2004-05 2004-05 2002-03 2003-04

  18. 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

  19. 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

  20. SOUTHERN REGION LOSS* • *Source : Report of System Studies conducted for Accessing Shunt Compensation requirement in Southern Region – March 2004 and March 2005 - SREB ,CEA • ** Projected figures • 0.5% REDUCTION MEANS 100 CR ANNUAL SAVINGS

  21. GRID PRESENT STATUSCARDINAL EVENTS

  22. GRID PRESENT STATUS -- CARDINAL EVENTS • AVAILABILITY BASED TARIFF • UNIFIED LOAD DESPATCH SCHEME • INTERREGIONAL AC / HVDC LINKS • NEW GENERATION ADDITION – SYSTEM STRENGTHENING SCHEMESS • OPERATIONAL EXCELLANCE ...THESE EVENTS CHANGED THE FACE OF GRID OPERATION

  23. Inter Regional Links 1650 MW 700 MW 1850 MW 900 MW 30,500 MW 2300 16,000 1100 MW 32,700 MW 1100MW Present IR Capacity = 9,000 MW 30,500 MW 2000MW GAJUWAKA HVDC BHADRAVATHI HVDC TALCHER – KOLAR HVDC LINE

  24. TALCHER KOLAR HVDC LINE LENGTH:1400 KMS TALCHER ORISSA) KOLAR (KARNATAKA) HVDC STATION

  25. 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

  26. TALCHER-KOLAR IMPORT OF 18422MUs FROM ER THROUGH TALCHER-KOLAR UPTO MAY - 05

  27. INTER-REGIONAL EXCHANGES DETAILS UPTO 124 WKS (Till 15.05.05)

  28. GRID OPERATION: A TIGHT ROPE WALK POWER SWINGS INSTABILITY INCREASED LOSSES BLACK-OUT IN-ECONOMIC OPERATION VOLTAGE COLLAPSE

  29. SHARP PEAK DEEP VALLEY DEEP VALLEY

  30. 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!!!

  31. KADAMPARAI PUMP OPERATION ON 16TH MAY 05 90 Mcft Pumped

  32. KADAMPARAI GENERATION/PUMP ENERGY FROM JAN - 2003

  33. OPPORTUNISTIC UI TRADE SAVING OF 50 LAKHS TO BOTH REGIONS

  34. DETAILS OF INTER-REGIONAL UI IMPORTS BY SR FROM WR AND ER DURING 21st - 27th MARCH 05

  35. 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

  36. 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

  37. SHARAVATHI GENERATION – TYPICAL DAY FREQ MW

  38. OPTIMAL RESERVOIR UTILISATIONSHARAVATHY / IDDUKI Rs. Rs. Rs. Rs. Rs. Rs. Rs. Rs. PLANT OPERATORS AT THESE STATIONS THINK OF THE RESERVOIR LEVEL IN RUPEES RATHER THAN IN FEET!!! Rs. Rs. Rs. Rs. Rs. Rs. Rs. Rs.

  39. SUMMARY OF UI – 124 WKS(FROM 01/JAN/03 TO 15/MAY/05)

  40. UI IN SR (FROM 01/01/03 TO 15/05/05) • TOTAL UI TURNOVER :- 7792 MU • TOTAL UI AMOUNT DISBURSED:- 1600 CR • AVG WEEKLY TRANSACTION:- 63 MU • AVG WEEKLY UI AMOUNT DISBURSED:- 13 CR

  41. 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

  42. MAJOR AND MINOR DISTURBANCES SINCE 1994 NO DISTURBANCES DESPITE LOSING ENTIRE SUPER GENERATING PLANTS LIKERAMAGUNDAM,VIJAYAWADA,KOTHAGUDEM, NORTH CHENNAI, SHARAVATHY ETC

  43. 49.72 HZ

  44. MERIT ORDER : UNITS BOXED UP

  45. 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.

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