1. MERIT ORDER SCHEDULING AND DESPATCH V. K. AGRAWAL NRLDC

2. Contents Electricity Accounting Load Generation Balance ABT Feedback Inter Regional Exchanges Loading of Transmission Network

3. ELECTRICITY ACCOUNTING ABT vis-à-vis Pre-ABT Period

4. Components of inter-utility tariff (Pre – ABT Mechanism)  Fixed charges  Interest on loans  Depreciation  O & M charges  Return on equity  Interest on Working Capital  Energy charges (fuel cost)  Incentives  Surcharge & other levies  No charge for reactive energy

5. TENTATIVE COST FOR NTPC THERMAL STATIONS FOR THE MONTH OF DEC 2003 Station Fixed Cost Rs. Cr/yr (1) Average Fixed Cost Rs. Cr/day (2) Average Fixed Cost P / KWh (3) Variable Base Cost P / KWh (4) Variable FPA P / KWh (5) Total Variable Base Cost P / KWh (6) Composite Cost P / KWh (3) + (6) Singrauli364.590.99628.2767.987.8675.84 104.11 Rihand478.741.33065.83106.0344.7078.99137.41 Unchahar – I195.910.53573.3555.836.74112.77186.12 Anta GPS*92.920.25847.1360.5584.11144.66139.47 Auraiya GPS*160.200.44542.1761.9292.88154.80169.73 DadriGPS G)210.960.57637.2095.140.2495.38132.58 Dadri (T)416.781.15876.9790.5655.57146.13229.24 Unchahar – II--- 103.286.98110.26473.75 Dadrigas(L)--- 356.3471.21436.55 *Rates for mixed fuel (gas+ liquid fuel, naphtha)

6. Payment to Inter State Generating Stations (ISGS) from beneficiaries under Availability Based Tariff (ABT)  Capacity charges  Energy charges  Unscheduled Interchange (UI)

8. Energy Charges (paise/kwh) for Central Sector stations (Dec 2003) Sl. No.Power StationRate (Paise / KWh) 1.Salal59.69 2.Tanakpur59.69 3.Singrauli75.84 4.Rihand78.99 5.Anta/Auraiya/Dadri GT95.00 6.Unchahar110.00 7.Dadri (Thermal)145.00

9. FREQUENCY vs UI PRICE 0 28 56 84 112 140 168 196 224 252 280 308 336 364 392 420 448 51 50.950.850.750.650.550.450.350.250.1 50 49.949.849.749.649.549.449.349.249.1 49 48.948.848.748.648.5 FREQUENCY PAISE/UNIT 49 HZ 50.5 HZ 49.5 HZ 50 HZ 49.5 HZ CORRESPONDS TO RS.2.80 UI PRICE AND FREQUENCY

10. LOAD GENERATION BALANCE

17. LOAD DIVERSITY The unique load curve of different identities due to varied nature of load / requirements results in the overall load diversity.

18. DEMAND ESTIMATION Availability = Own Generation (+) Entitlement from Grid (+) Bilaterals

19. ENTITLEMENTS = Fixed Shares + Unallocated Shares

20. FIXED SHARES Allocation to States from the Central Sector Stations in terms of Percentages which generally remain fixed. UNALLOCATED SHARES Allocation to States from Central Sector Stations in terms of Percentages which are changed on seasonal basis and / or under typical conditions as decided by Govt. of India.

34. ABT FEEDBACK

36. Singrauli & Rihand 2555 2530 2491 2505 2200 2300 2400 2500 2600 2700 Pre ABT(Dec 01-Nov 02)Post ABT(Dec 02-Nov 03) Average MW Declared CapabilityInjection Schedule Unchahar-1 & 2 691 687 599 653 500 550 600 650 700 750 Pre ABT(Dec 01-Nov 02)Post ABT(Dec 02-Nov 03) Average MW Declared CapabilityInjection Schedule Dadri (T) 711 640 619 717 500 550 600 650 700 750 800 Pre ABT(Dec 01-Nov 02) Post ABT(Dec 02-Nov 03) Average MW Declared CapabilityInjection schedule Anta, Auraiya & Dadri 1478 1336 1330 1636 1100 1200 1300 1400 1500 1600 1700 1800 Pre ABT(Dec 01-Nov 02) Post ABT(Dec 02-Nov 03) Average MW Declared CapabiltyInjection Schedule

39. INTER REGIONAL EXCHANGES

40. HCDC Sasaram B-B HCDC Vindhyachal B-B HCDC Gazuaka B-B HCDC Talcher Kolar HCDC Chandrapur B-B Inter Regional HVDC Links

41. 100 MW ISGS Allocations 0000 to 2400 hrs 100 MW WBSEB to J&K 0000 to 2400hrs- PTC 50 MW GRIDCO to DTL-NVVNL 140 MW WBSEB to DTL 0000 to 2400-PTC 100 MW DVC to HVPNL 0000 to 1700 & 2300 to 2400 hrs-PTC 10 MW GRIDCO to HVPNL 0000 to 1700 & 2300 to 2400 hrs-NVVNL 440 100 50 MW DVC to DTL- PTC 450

45. NR BILATERAL AGREEMENTS

46. LOADING OF TRANSMISSION NETWORK

50. ECONOMY OF REQUISITIONING FROM GAS STATIONS ON LIQUID FIRING Energy Charges (Liquid Firing) AntaRs. 3.20/unit AuraiyaRs. 3.00/unit DadriRs. 5.00 /unit (approx) UI Rates 49.5 HzRs. 2.80 49.4 HzRs. 3.08 49.3 HzRs. 3.36 49.2 HzRs. 3.64 49.1 HzRs. 3.92 49.0 Hz & BelowRs. 4.20 Tariff Regulation – Economy and Efficiency vis-à-vis Security

62. Thank You