The government on Saturday sought to assuage fears of electricity grid instability due to simultaneous switching on and off of most lights in the country, saying adequate protocols are in place to handle the variation in demand without causing any damage to appliances.
Prime Minister Narendra Modi has asked citizens to switch off lights for nine minutes at 9 pm on Sunday and light candles and torches to "challenge the darkness of the coronavirus crisis that has forced a three-week country-wide lockdown.
Several states shot off letters to power utilities to take steps to deal with the possibility of a sudden drop in electricity demand, which has already dipped by 25 per cent to 125.81 gigawatts due to the lockdown shutting down most businesses.
Power System Operation Corp Ltd, the agency responsible for managing electricity grid, said the lighting load of household consumes may be no more than 12-13 GW.
"Unlike normal operation, this reduction in load of the order of 12-13 GW would happen in 2-4 minutes and recover nine minutes later," it said. "This sharp reduction in load and recovery, which is unprecedented, will need to be handled through hydro and gas resources."
"Some apprehensions have been expressed that this may cause instability in the grid and fluctuation in voltage which may harm the electrical appliances. These apprehensions are misplaced," an official statement said. "The Indian electricity grid is robust and stable and adequate arrangements and protocols are in place to handle the variation in demand."
"There is no call to switch off either street lights or appliances like computers, TVs, fans, refrigerators and ACs in the homes. Only lights should be switched off," the statement said. "The lights in hospitals and all other essential services like public utilities, municipal services, offices, police stations, manufacturing facilities, etc will remain on."
Union Power Secretary Sanjiv Nandan Sahai also wrote to heads of state power departments, saying "the National Load Despatch Centre has worked out the procedures for grid balancing during the period which they will be communicating to the regional and state load despatch centres separately."
He said there is no call to switch off either street lights or appliances in homes. "Adequate arrangements and protocols are in place to handle the variation in demand. People should be assured not to worry and continue running all appliances as usual."