1. LOAD FLOW STUDIES 01-04-1994 TO 31-10-1998

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

3. SELECTION OF MINIMUM FREQUENCY DAY 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.

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

5. SELECTION OF MAXIMUM FREQUENCY DAY 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.

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

7. GENERALLY AVAILABLE 400KV VOLATAGES AT SRLDC RAMAGUNDAM HYDERABAD NAGARJUNASAGAR CUDDAPAH GOOTY BANGALORE

8. GENERALLY AVAILABLE 400KV ENERGY 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

9. GENERALLY AVAILABLE 400KV MVAR FLOWS AT SRLDC NAGARJUNASAGAR - MUNIRABAD CUDDAPAH - MADRAS CUDDAPAH –BANGALORE GOOTY –BANGALORE SALEM -BANGALORE

10. GENERALLY AVAILABLE AT SRLDC 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

11. SYSTEM STUDIES FOR 1994-1998 CONDITIONS MODUS OPERANDI

12. LOAD 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

13. DATA 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

14. LIST OF 400/220/230 kV ICT ANDHRA PRADESH GAZUWAKA VIJAYAWADA KHAMMAM RAMAGUNDAM GHANAPUR N’SAGAR CUDAPPA GOOTY

15. LIST OF 400/220/230 kV ICT KARNATAKA RAICHUR (KPTCL) SOMANHALLI MUNIRABAD GUTTUR(KPTCL) HOODY(KPTCL)

16. LIST OF 400/220/230 kV ICT TAMIL NADU SRIPERUMBUDUR NLY TS II TRICHY MADURAI UDUMALPET SALEM KERALA TRISSUR

17. LOAD FLOW OUTPUT VOLTAGES AT ALL BUSES LINE FLOWS ON ALL 400 KV LINES

18. 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.

19. ON 24 th AND 25 th 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).

20. THE FORMATS OF DATA REQUIREMENT FROM EACH STATE REQUIRED TO CARRY OUT SYSTEM STUDIES WAS PREPARED BY SRLDC AND SENT TO ALL STATES ON 01 st JUNE 2005. THE FILED DATA FORMATS WERE RECEIVED BY SRLDC AS FOLLOWS KSEB18.06.05 TNEB27.07.05 APTRANSCO09.08.05 KPTCL17.08.05

21. 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 & MVAR RAMAGUNDAM UNIT WISE MW & MVAR TNEB :- NEYVELI ICT MW & MVAR 400 KV BUS VOLTAGES AT MADRAS, SALEM, UDUMALPET