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UI & Intra-State ABT

Explore the benefits of Availability Based Tariff (ABT) and Intra-State ABT for optimizing grid operations and maximizing generation availability. Learn about the implementation plan, issues addressed, and achievements in improving power supply quality and facilitating efficient bilateral trading. Discover how these mechanisms enhance grid discipline and encourage economic principles for grid operation.

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UI & Intra-State ABT

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  1. UI & Intra-State ABT K . RAMAKRISHNA Power Grid Corporation of India Ltd.

  2. SCOPE OF THE PRESENTATION • ABT AND UI • INTRA-STATE ABT – IT’S NEED • ISSUES OF CONCERN • IMPLEMENTATION PLAN

  3. GRID STATUS – PRE - ABT • Large Frequency fluctuations • 48.0Hz to 52 Hz. • Low Voltages • 400kV going down upto 300kV • Frequent Grid Disturbances • Sub-Optimal Operation • High Technical loss Grid Operation on fire fighting instead of Optimisation & Economy

  4. AVAILABILITY BASED TARIFF Spearheaded by POWERGRID Features: • Unique commercial mechanism linked with frequency • Fixed Charges i.e. Capacity charges • As per Plant Availability. • Variable Charges i.e. Energy charges • As per Schedule. • Unscheduled Inter change (UI) i.e. deviations from schedule ( Schedule – Actual) • Price as per prevailing system frequency SCH-ACT GRAPHS

  5. UI RATE Current Rate of Unscheduled Drawal/Injection From 01.04.2004 to 30.09.2004 From 01.10.2004 to till date Till 31.03.2004

  6. AVAILABILITY BASED TARIFF • Achievements • Implemented between July 2002 and Nov.’2003 • Improved quality of supply. • Unutilised capacity harnessed-PumpedStorage • Merit order Operation. • Grid discipline • Emphasis on load forecasting • Discourage overdrawals during low frequency • Facilitate bi-lateral trading • Maximisation of generation availability ABT ACHIEVEMENTS

  7. Need for intra-State ABT • Accountability of utilities after reforms • Passing on UI payment • Intra State ABT to identify agencies responsible for overdrawal/underdrawal, overgeneration/ undergeneration, resulting in UI payment to regional pool. • Proper Demand forecast and load management by DISCOMs • To establish a framework for bilateral trading at intra-State level • To achieve overall merit order operation.

  8. Inter-State ABT Non-conventional source of energy e.g., wind energy Intra-State ABT IPPs CPPs • Distribution Control Centre –One for each Discom • ISGS: Inter State Generating Stations • SGS: State Generating Stations • CTU: Central Transmission Utility • STU: State Transmission Utility

  9. Intra-state ABT – Achieves. • Mechanism to price power based on Demand/Supply • Harness surplus generating capacity available in state with CPPs/IPPs • Operation of grid on economic principles –Merit Order Despatch • Open Access in Intra-state Transmission and Distribution.

  10. Intra-state ABT – achieves • Generate signals for efficient grid operation at the intra-state level. • Overdrawals at low frequency by Discoms duly priced. • Encourage serving of higher consumer demand • Encourage maximisation of generation during deficit conditions. • Each Discom and state generating station responsible for its actions – a profit centre • Commercial signals available to large consumers capable of regulating drawal

  11. …Intra-state ABT – achieves. • UI mechanism at the intra-state level. • UI to be applied on the deviations from the schedules of the DISCOMS/State generators/IPPs/CPPs. • State Utilities to be collectively liable for the States’ liabilities with the regional UI pool account. • Achieves merit order operation for all the entities under ABT • Commercial viability of running Pumped Storage Stations.

  12. Issues needs to be addressed for intra-State ABT • Restructured SEBs • Identification of entities for intra-State ABT • Scheduling Principles & Procedures • Commercial Principle • Metering Philosophy • Treatment of existing Agreements • Organisational Development • Regulatory Issues

  13. Options for different market participants like CPPs/Co-gens DISCOM-B Case-II DISCOM-A Case-I Case-II Case-III CPP/ Co-Gen

  14. Case- I CPP embedded in same DISCOM No intra-State ABT (in future, can be in intra-DISCOM ABT) Options for different market participants like CPPs/Co-gens Case-II CPP located in One DISCOM, sale power to host DISCOM and to other DISCOM also Intra-State ABT Case-III CPP located in one DISCOM, selling power to other DISCOM Intra-State ABT

  15. Some of the features of New National Electricity Policy – Feb.’05 • Appropriate Commissions to undertake development of power market • SERCs to notify GRID CODE by September 2005, if not yet notified • State Commissions to ensure upgradation of SLDCs by June 2006 • SERCs are advised to introduce ABT regime at the State level within one year i.e. by February 2006.

  16. Status on intra-State ABT • Many SEBs restructured, others in process • State Utilities looking for benefits of intra-State ABT • Gujarat took lead for intra-State ABT • Punjab took lead in Northern Region • Road-map for Maharashtra is ready • Other States like MPSEB & Haryana to follow • POWERGRID assisting these States by providing consultancy

  17. Thank You

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