Overdrawal from Power Grid

Measures such as frequency based automatic load shedding schemes, system protection schemes, primary response from generators through Free Governor/ Restricted Governor mode of operation are, at present, in place to prevent grid outages and power swings. Further, RLDCs and SLDCs also keep a watch on the overloading of grid elements even under normal frequency band of operation and advise the concerned utility to check the overloading which may lead to grid outages/power swings. 

No specific rules/guidelines regarding overdrawal of power by States have been issued by CERC after the grid disturbance incident during the month of July 2012.

To prevent the recurrence of the grid disturbances which took place on July 2012, the Enquiry Committee, constituted by Ministry of Power, had recommended several measures for increasing the protection system of power grids including Third Party Protection Audit (TPA) of the sub-stations throughout the country. TPA has been completed in all regions of the country. Other measures that have been initiated include preparation of comprehensive defence plan covering under-frequency, rate of change of frequency under voltage, system protection schemes to cover large generation and transmission line outages, advise to utilities to prepare outage plans for generating units and transmission lines in consultation with Regional Power Committees.