ABT & IEGC

1. ABT & IEGC

2. Availability Based Tariff (ABT)

3. Real-time demand Intra Day demand Forecasted demand UI Hour Ahead Day Ahead Buy Buy Sell Sell A Typical Dispatch Surpluses/Deficits - Balance supply and demand MW BILATERAL CONTRACTS FIRM SHARES IN ISGS Hours POWERGRID - NRLDC

4. CS - 1 CS - 2 IPP Regional Grid RLDC Coordinates State - C State - A State - B INTER STATE GRID CS: Central Sector Control Areas

5. STATE GENR. STATE IPP CENTRAL SHARE SEB’s Grid SLDC Coordinates Directs Trading Trading Discom - A Discom - C Consumer Discom - B INTRA STATE GRID

6. ABC of ABT • ABT is a scientific settlement system for contracted sale & purchase of power • Has three components • Fixed Charges or capacity charge • Linked to day-ahead declared availability/subscription • Variable Charges or fuel charges • Linked to before the fact energy schedules • Charges for deviation from commitments POWERGRID - NRLDC

7. ABC of ABT • Frequency actuated signal • Signal transmitted at the speed of dynamics to be controlled • Quasi-steady state assumption not valid • Real time pricing stretched to its physical limits • Merit order • Economic load management • Incentives for helping the grid • Opportunities for a diligent player • Simple, dispute-free weekly settlement system POWERGRID - NRLDC

8. Decentralized Scheduling – Regional Level Time S L D C R L D C I S G S Availability Declaration Entitlements Requisition & Bilateral Agreements Injection Schedule Drawal Schedule Revision in DC Revision in Requisition Final Injection Schedule Final Drawal Schedule 0 to 24 hours Revisions during Current day Revisions during Current day POWERGRID - NRLDC

9. S T A T E GEN D C ENTITLEMENTS D C DRAWL SCH DRAWL SCH DRAWL SCH ENTITLEMENTS ISGS SHARES R L D C INJECT SCH REQUISITION REQUISITION INJECT SCH REQUISITION S T A T E IPP Decentralized Scheduling – State Level S L D C D I S C O M Entitlements of Discos In ISGS & State Gen Worked out by SLDC D I S C O M POWERGRID - NRLDC

10. Balancing market guiding vector POWERGRID - NRLDC

11. PIT-HEAD LOAD CENTRE COMBINED CYCLE NUCLEAR OVERFLOWING HYDRO GAS-TURBINE DIESEL GENR, DEPLED HYDRO NORMAL HYDRO MANUAL LOAD SHEDDING UI RATE ~ INCREMENTAL COST (PAISA/kWh) POWERGRID - NRLDC

12. Improvement in Frequency Profile POWERGRID - NRLDC

13. UI mechanism • Maximizes social welfare • Transparent, neutral & rigging proof • Diffuses market power • Ultimate open access • Facilitates reforms in the sector • Encourages trade and bilateral exchanges • Facilitates arbitrage with other regional power pools • Offers alternative tariff mechanism for independent power producers and merchant plants POWERGRID - NRLDC

14. ADVANTAGES ABT & UI • Inculcates self discipline among participants • Incentives to those who help the grid • Disincentives to those who harm the grid • Is scientific commercial mechanism • Brings in economy and efficiency • Achieves natural merit order in generation • Conducive for competition in power sector • Provides platform for power market to flourish POWERGRID - NRLDC

15. The End Result …. • Frequency is • collectively controlled • democratically stabilized • Wholesale market is workably competitive • allocative efficiency • productive efficiency • Economic signal available for • optimum utilization of resource • investments in generation capacity • Settlement is • streamlined • dispute-free POWERGRID - NRLDC

16. Metering System POWERGRID - NRLDC

17. Accounting • Regional Energy Account • An energy only account • Capacity Charges • Energy Charges • Periodicity of Issue : Monthly • Issuing Agency : concerned RPC • UI Pool Account • Reactive Energy Account POWERGRID - NRLDC

18. UI Pool Account • Operated by the RLDC • Account issued weekly (week: Monday through Sunday) • Players in the regional pool • Drawee utilities • Generators POWERGRID - NRLDC

19. Indian Electricity Grid Code

20. IEGC The IEGC brings together a single set of technical rules,encompassing all the Utilities connected to/or using the inter-State transmission system (ISTS) and provides the following: • Documentation of the principles and procedures which define the relationship between the various Users of the inter-State transmission system (ISTS), as well as the Regional and State Load Dispatch Centers • Facilitation of the operation, maintenance, development and planning of economic and reliable Regional Grid • Facilitation for beneficial trading of electricity by defining a common basis of operation of the ISTS, applicable to all the the users of the ISTS POWERGRID - NRLDC

21. Chapter – 1: General 1.1 Introduction 1.2 Objective 1.3 Scope 1.4 Structure of the IEGC 1.5 Non-Compliance 1.6 Free Governor Mode of Operation 1.7 Charge/payment for Reactive Energy Exchanges 1.8 Exemptions 1.9 Glossary and Definitions POWERGRID - NRLDC

22. Chapter – 2: Role of Various Organizations and Their Linkages 2.1 Introduction 2.2 Role of RLDCs 2.3 Role of RPCs2 2.4 Role of CTU 2.5 Role of CEA 2.6 Role of SLDCs 2.7 Role of STUs POWERGRID - NRLDC

23. Chapter – 3: Planning Code For Inter State Transmission 3.1 Introduction 3.2 Objective 3.3 Scope 3.4 Planning Policy 3.5 Planning Criterion 3.6 Planning Data 3.7 Implementation of Transmission Plan POWERGRID - NRLDC

24. Chapter – 4: Connection Conditions 4.1 Introduction 4.2 Objective 4.3 Scope 4.4 Procedure for Connection 4.5 Connection Agreement 4.6 ISTS Parameter Variations 4.7 Agency & CTU equipment at Connection Points 4.8 Generating Units and Power Stations 4.9 Reactive Power Compensation 4.10 Data & Communication Facilities 4.11 System Recording Instruments 4.12 Responsibilities for Operational Safety 4.13 Procedure for site access, site operational activities and maintenance standards 4.14 International Connections to ISTS 4.15 Schedule of Assets of Regional Grid Annexure : 1 Model Connection Agreement POWERGRID - NRLDC

25. Chapter – 5: Operating Code For Regional Grids 5.1 Operating Policy 5.2 System Security Aspects 5.3 Demand Estimation for Operational Purposes 5.4 Demand Management 5.5 Periodic Reports 5.6 Operational Liaison 5.7 Outage Planning 5.8 Recovery Procedures 5.9 Event Information POWERGRID - NRLDC

26. Chapter – 6: Scheduling and Dispatch Code 6.1 Introduction 6.2 Objective 6.3 Scope 6.4 Demarcation of Responsibilities 6.5 Scheduling and Despatch procedures 6.6 Reactive Power and Voltage Control Annexure 1 : Complementary Commercial Mechanism Annexure 2 : Regulatory Requirements of Special Energy Meters Annexure 3 : Payment for Reactive Energy Exchanges on State- owned Lines POWERGRID - NRLDC

27. Chapter – 7 & 8 • Chapter – 7: Inter – Regional Exchanges • Chapter – 8: Management of IEGC I E G C POWERGRID - NRLDC

28. Discussion