Punjab Islanding Scheme - Northern Regional Power Committee
Punjab Islanding Scheme - Northern Regional Power Committee
Punjab Islanding Scheme - Northern Regional Power Committee
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CHAPTER-1.0<br />
1.0 PREAMBLE<br />
1.1 Two major grid failure incidents occurred on 30 th and 31 st July, 2012 affecting a<br />
large area of power network covering states namely Uttar Pradesh, Uttarkhand,<br />
<strong>Punjab</strong>, Haryana, Rajasthan, Himachal Pradesh, Delhi falling under <strong>Northern</strong><br />
Region beside other states of Eastern (ER) & North- Eastern (NER) regions during<br />
grid failure on 31.7.2012. In order to look in to the issues related to the Grid failures<br />
and take necessary remedial measures, Ministry of <strong>Power</strong> (MoP), Govt. of India<br />
(GoI) and North Indian States deliberated various steps to be taken during North<br />
India Chief Ministers and <strong>Power</strong> Minister, GOI conference held at Delhi on 6 th<br />
August 2012. A twelve point resolution was approved to avoid grid<br />
disturbance/collapse in future. As per the MoP directive, all states must<br />
ascertain preparedness of power system defense plans and protection<br />
system in accordance with the Indian Electricity Grid Code (IEGC), whi ch<br />
shall include islanding schemes, Under Frequency Relays (UFR), rate of<br />
change frequency relays (df/dt), special protection schemes (SPS) and<br />
automatic demand management schemes.<br />
1.2 An Expert <strong>Committee</strong> constituted to enquire into the said <strong>Power</strong> Grid Disturbance<br />
and to suggest remedial measures, has also inter alia made the following<br />
recommendations:-<br />
"Effort should be made to design islanding scheme based on frequency sensing<br />
relays so that in case of imminent grid failure, electrical islands can be formed.<br />
These electrical islands can not only help in maintaining supply to essential<br />
services but would also help in faster restoration of grid .<br />
Action: CEA, RPCs, POWERGRID, STUs, SLDCs and Generators<br />
Time Frame: 6 months"<br />
1.3 The Expert <strong>Committee</strong> has further formed five groups to look in to various<br />
aspects related to grid disturbances. One of the groups headed by Member<br />
Secretary, NRPC was formed for islanding scheme in <strong>Northern</strong> Region.<br />
Minutes of first meeting of the islanding <strong>Scheme</strong> group was held at NRPC<br />
office at Delhi on 07.08.2012. (Copy enclosed as Appendix I) which was<br />
attended by representatives from all constituents under NR.<br />
1<br />
The group<br />
agreed on various aspects & modalities for implementation of the islanding
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