13-08-2012, 04:24 PM
[align=right]POWER SYSTEM IN INDIA OVER VIEW[/size]
Electricity Act 2003 w.e.f. 10th Jun-03
Repealed Electricity Act 1910, 1948, 1998
Delicensed generation
Large hydro generation with concurrence
Electricity trading a distinct activity
Non-discriminatory open access
Re-organization of State Electricity Boards
Appellate Tribunal to hear appeals against CERC/SERC
Metering made mandatory
Thrust for rural electrification
Indian Electricity Grid Code (IEGC)
“Describes the philosophy and the responsibilities for planning and operation of Indian power system specified by the Commission in accordance with sub section 1(h) of Section 79 of the Act.”
In force since February 2000
Last revision in April 2006
Contains
Technical Rules, Guidelines & Operational Standards for planning, development, maintenance and operation of power system to be followed by various agencies & participants in the system
Role of Statutory bodies- CEA, CTU, RPC, SLDC, RLDC
Problems associated with grid operations before ABT
Low frequency during peak load for many hours a day (48.0-48.5Hz)
High frequency during off peak for many hours a day (50.5-51 Hz)
Very rapid and wide changes in frequency
Frequent grid disturbances causing tripping of generating stations and interruption of supply to large blocks of consumers and disintegration of the regional grids
Absence of incentives or penalties for the individual utilities responsible for the above problems
No emphasis on reducing cost of generation
Reasons
Indiscipline by generator by generating more during high frequency and less during low frequency than scheduled generation
Indiscipline by constituents by drawing more during low frequency and less during high frequency than the schedule drawal.
Both are injurious to the grid
Hence CTU in the public hearing conducted by CERC endorsed M/s ECC’s Report and proposed ABT.
Solutions identified
Maximization of generation during peak load hours and load curtailment equal to the deficit in generation
Backing down of generation to match the system load reduction during off peak hours, as per merit order of generation
LGB (Load-Generation Balance) to be maintained.
History
The Government of India and ADB in co-operation with the world bank in February 1993 entrusted a study on the Indian power system to a reputed international consultant – M/s ECC (Energy and Control Consultants, Inc USA) to recommend a suitable tariff structure.
The Report (Availability Tariff) was submitted by in February 1994
Constitution of NTFs and RTFs for debate on various issues of AT – No way forward.