LOAD FLOW STUDIESLOAD FLOW STUDIES01-04-1994 TO 31-10-199801-04-1994 TO 31-10-1998

01-04-1994 TO 31-10-199801-04-1994 TO 31-10-1998

• DURING THE ABOVE PERIOD FOR EACH YEAR AND EACH QUARTER IN EACH YEAR MAXIMUM AND MINIMUM FREQUENCY OF A DAY WILL BE IDENTIFIED

SELECTION OF MINIMUM FREQUENCY SELECTION OF MINIMUM FREQUENCY DAY IN EACH QUARTERDAY IN EACH QUARTER

• IN EACH QUARTER, ON HOURLY BASIS, THE AVERAGE FREQUENCY OF SR GRID WILL BE TABULATED.

• THE MINIMUM FREQENCY WILL BE SELECTED FROM THE ABOVE TABULATED VALUES.

(PEAK HOURS i.e. 0600- 0900 HRS AND 1900 – 2200 HRS. ONLY – 90*6=540 VALUES)

• IN CASE OF MORE THAN ONE VALUES OF MINIMUM FREQUENCY, THE FIRST HOUR IN THE DAY IN THAT QUARTER ON WHICH IT OCCURS WILL BE SELECTED.

DATA REQUIREMENTDATA REQUIREMENT

• AFTER SELECTION OF THE DAY ON WHICH MINIMUM FREQUENCY OCCURRED, THE DATA HAS TO BE COLLECTED FOR CARRYING OUT LOAD FLOW STUDIES.

SELECTION OF MAXIMUM FREQUENCY SELECTION OF MAXIMUM FREQUENCY DAY IN EACH QUARTERDAY IN EACH QUARTER

• IN EACH QUARTER, ON HOURLY BASIS, THE AVERAGE FREQUENCY OF SR GRID WILL BE TABULATED.

• THE MAXIMUM FREQENCY WILL BE SELECTED FROM THE ABOVE TABULATED VALUES.

(OFFPEAK HOURS i.e. 0000- 0400 HRS AND 1200 – 1400 HRS ONLY)

• IN CASE OF MORE THAN ONE VALUES OF MAXIMUM FREQUENCY, THE FIRST HOUR IN THE DAY IN THAT QUARTER ON WHICH IT OCCURS WILL BE SELECTED.

DATA REQUIREMENTDATA REQUIREMENT

• AFTER SELECTION OF THE DAY ON WHICH MAXIMUM FREQUENCY OCCURRED, THE DATA HAS TO BE COLLECTED FOR CARRYING OUT LOAD FLOW STUDIES.

GENERALLY AVAILABLE 400KV GENERALLY AVAILABLE 400KV VOLATAGES AT SRLDCVOLATAGES AT SRLDC

• RAMAGUNDAM

• HYDERABAD

• NAGARJUNASAGAR

• CUDDAPAH

• GOOTY

• BANGALORE

GENERALLY AVAILABLE 400KV GENERALLY AVAILABLE 400KV ENERGY FLOWS AT SRLDCENERGY FLOWS AT SRLDC

• NAGARJUNASAGAR - MUNIRABAD• CUDDAPAH - MADRAS• CUDDAPAH –BANGALORE• GOOTY –BANGALORE• SALEM –BANGALORE

FROM THE ABOVE ENERGY READINGS MW POWER WILL BE CALCULATED ON HOULY BASIS

GENERALLY AVAILABLE 400KV GENERALLY AVAILABLE 400KV MVAR FLOWS AT SRLDCMVAR FLOWS AT SRLDC

NAGARJUNASAGAR - MUNIRABAD

• CUDDAPAH - MADRAS

• CUDDAPAH –BANGALORE

• GOOTY –BANGALORE

• SALEM -BANGALORE

GENERALLY AVAILABLE AT GENERALLY AVAILABLE AT SRLDCSRLDC

• DEMANDS OF APSEB,KEB,KSEB,TNEB

• HYDRO AND THERMAL GENERATION OF APSEB,KEB,KSEB, TNEB

• EX-BUS GENERATION OF RSTPS, NLC, MAPS

• NET INTERCHANGE BETWEEN ON INTERSTATELINES OF KAR – KER, TN -KER

SYSTEM STUDIES FOR SYSTEM STUDIES FOR 1994-1998 CONDITIONS1994-1998 CONDITIONS

MODUS OPERANDIMODUS OPERANDI

LOAD FLOW MODELLOAD FLOW MODEL

• ONLY THE 400 KV NETWORK, 400/220 KV ICT WOULD BE MODELLED

• MW,MVAR FLOW ON THE ICTs WOULD BE REPRESENTED AS A LOAD

DATA REQUIREMENTDATA REQUIREMENT• ALL 400/220/230 KV ICTs FLOWS MW AND MVAR• ALL 400 KV HVDC SET POINTS• MW AND MVAR GENERATION OF GENERATORS

ON 400 KV BUS

–RAMAGUNDAM(NTPC)–NEYVELI-STAGE2(NLC)–RAICHUR(KPTCL)

• 400 KV VOLTAGE AT RAMAGUNDAM, HYDERABAD, NUNNA, GAZUWAKA, CUDDAPAH, GOOTY, BANGALORE, MADRAS , NEYVELI AND THRISSUR

• DRAWAL OF ALL CONSTITUENTS

LIST OF 400/220/230 kV ICTLIST OF 400/220/230 kV ICT

• ANDHRA PRADESH

GAZUWAKAVIJAYAWADAKHAMMAMRAMAGUNDAMGHANAPURN’SAGARCUDAPPAGOOTY

LIST OF 400/220/230 kV ICTLIST OF 400/220/230 kV ICT

• KARNATAKA

RAICHUR (KPTCL)

SOMANHALLI

MUNIRABAD

GUTTUR(KPTCL)

HOODY(KPTCL)

LIST OF 400/220/230 kV ICTLIST OF 400/220/230 kV ICT• TAMIL NADU

SRIPERUMBUDURNLY TS IITRICHYMADURAIUDUMALPETSALEM

• KERALA

TRISSUR

LOAD FLOW OUTPUTLOAD FLOW OUTPUT

• VOLTAGES AT ALL BUSES

• LINE FLOWS ON ALL 400 KV LINES

• IN SPECIAL TCC MEETING HELD ON 19.05.2005 AT BANGALORE HAS DECIDED THE FOLLOWING:

• SELECTION OF MAXIMUM FREQUENCY DAY IN EACH QUARTER

• SELECTION OF MNIIMUM FREQUENCY DAY IN EACH QUARTER

• TO CARRY OUT SYSTEM STUDIES, THE SRLDC PROPOSED DATA WILL BE COLLECTED BY STATES.

• ON 24th AND 25th MAY 2005, THE STATES REPRESENTATIVES ARRIVED AT SRLDC, BANGALORE AND CARRIED OUT STUDIES TO FIND OUT MAXIMUM AND MINIMUM HOURLY AVERAGE FRFEQUENCY FOR EACH QUARTER FOR THE PERIOD 01-04-1994 TO 31-10-1998 (19 SAMPLES FOR EACH CASE).

• THE FORMATS OF DATA REQUIREMENT FROM EACH STATE REQUIRED TO CARRY OUT SYSTEM STUDIES WAS PREPARED BY SRLDC AND SENT TO ALL STATES ON 01st JUNE 2005. THE FILED DATA FORMATS WERE RECEIVED BY SRLDC AS FOLLOWS

• KSEB 18.06.05• TNEB 27.07.05• APTRANSCO 09.08.05• KPTCL 17.08.05

• AFTER RECEIPT OF THE DATA IT HAS BEEN OBSERVED THAT FOR SOME CASES THE FOLLOWING DATA IS NOT AVAILABLE IN RESPECT OF EACH STATE WISE AS FOLLOWS:

• APTRANSCO :-RAMAGUNDAM ICT MW & MVARRAMAGUNDAM UNIT WISE MW & MVARTNEB :- NEYVELI ICT MW & MVAR400 KV BUS VOLTAGES AT MADRAS, SALEM, UDUMALPET