Petition No. 137/MP/2012. Case: Chhattisgarh State Power Generation Company Ltd. Vs Western Regional Load Despatch Centre, Mumbai. Central Electricity Regulatory Commission
| Case Number | Petition No. 137/MP/2012 |
| Judges | Dr. Pramod Deo, Chairperson, Shri S. Jayaraman, Member, Shri V.S. Verma, Member and Shri M. Deena Dayalan, Member |
| Issue | Electricity Law |
| Judgement Date | September 25, 2012 |
| Court | Central Electricity Regulatory Commission |
Order:
(New Delhi)
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This petition has been filed by the Chhattisgarh State Power Generation
Company Ltd, for extension of time for putting the generators of Hasdeo Thermal
Power Station (HTPS) in Restricted Governor Mode of Operation (RGMO) up to year
2014-15 and for permission to run Hasdeo Bango Hydel Power Station (HBHPS) on
Free Governor Mode of Operation till commissioning of new software based EHG
system, under Regulation 5.2 (f) of the Central Electricity Regulatory
Commission (Indian Electricity Grid Code) Regulations, 2010 (hereinafter referred
"Grid Code").
Background
Regulation 5.2.(f) of the Central Electricity Regulatory Commission (Indian
Electricity Grid Code) Regulations, 2010 (hereinafter referred "Grid
Code") provides as under:-
Governor Action
(i) Following Thermal and hydro (except those with up to three hours
pondage) generating units shall be operated under restricted governor mode of
operation with effect from the date given below:
(
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Thermal generating units of 200 MW and above,
(1) Software based Electro Hydraulic Governor (EHG) system: 1.8.2010
(2) Hardware based EHG system: 1.8.2010
(b) Hydro units of 10 MW and above: 1.8.2010
(ii) The restricted governor mode of operation shall essentially have the
following features:
(
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There should not be any reduction in generation in case of improvement
in grid frequency below 50.2 Hz. (for example if grid frequency changes from
49.3 to 49.4 Hz. then there shall not be any reduction in generation). Whereas
for any fall in grid frequency, generation from the unit should increase by 5%
limited to 105 % of the MCR of the unit subject to machine capability.
(b) Ripple filter of +/- 0.03 Hz. shall be provided so that small changes in
frequency are ignored for load correction, in order to prevent governor
hunting.
(c) If any of these generating units is required to be operated without its
governor in operation as specified above, the RLDC shall be immediately advised
about the reason and duration of such operation. All governors shall have a
droop setting of between 3% and 6%.
(d) After stabilisation of frequency around 50 Hz, the CERC may review the
above provision regarding the restricted governor mode of operation and free
governor mode of operation may be introduced.
(iii) All other generating units including the pondage up to 3 hours Gas
turbine/Combined Cycle Power Plants, wind and solar generators and Nuclear
Power Stations shall be exempted from Sections 5.2 (f), 5.2...
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