Despite chief minister Sheila Dikshit's recent orders to power distribution companies to ensure the city doesn't suffer from power cuts, on Tuesday many areas in south and east Delhi went without electricity for hours.
Some of the worst affected areas were Greater Kailash I, Kailash Colony, Amar Colony, Mayur Vihar phase I, New Ashok Nagar and Karkardooma. The situation was especially bad in some parts of south Delhi which went without electricity for at least four hours.
According to power department officials, the supply of coal to many electricity stations that supply power to Delhi has been hit by cancellation and rescheduling of goods trains due to dense fog across north India.
"Coal shortage at NTPC Limited is a problem. Though the Dadri plant has increased production, it continues to generate up to 400 MW less compared to its normal output. A number of other coal-based power stations have also curtailed supply to Delhi," said a senior government official.
"The entire country has been affected due to this. Technical glitches in a number of thermal power generating stations have compounded the problem," the official added.
"The issue was slightly compounded on Tuesday due to the sudden increase in power demand. While on Monday, the maximum load was 3,800 MW am, it increased on Tuesday by over 8% to touch 4,122 MW - the highest ever at this time of the year. The highest demand last year in winter months was 3,934 MW on January 29," added the official.
Sources said the Nathpa Jhakri plant in Himachal Pradesh, which supplies 350 MW power to Delhi, was also shut for some time on Monday due to heavy snowfall.