New Delhi, April 3 -- Prime Minister Narendra Modi's appeal for a 9-minute blackout at 9 p.m. on Sunday, has shaken the babus in the power ministry who have put themselves in a huddle to quickly devise a strategy to prevent the April 5 event from creating ground for a possible grid collapse and resultant blackout throughout the country.

The Grid stability in the country is maintained by keeping power frequency within a range specified by Central Electricity Regulatory Authority (CERC). Any deviation from identified frequency is managed by increasing or decreasing power flow in the grid. Sudden drop or increase in frequency causes a collapse.

The Prime Minister's call for a blackout urging citizens to light a lamp, candle or shine a mobi...