Generator transformer of unit number four of Anpara project having capacity of 500 mega watt developed snag on Sunday after which it stopped power generation, UP Rajya Vidyut Utpadan Nigam Ltd Chairman and Managing Director Kamran Rizvi.
He said transformer of 500 MW five number unit of the same plant developed snag on July 9 and was being repaired by Bharat Heavy Electrical Limited at Bhopal.
Rizvi said it takes at least one month to get a generation transformer repaired.
The transformer which developed snag on July 9 is to become operational by August 14.
Due to closure of units, power generation has been reduced to 1,600 MW as against 2,500 to 3,000 MW in normal days, sources said.
While the power demand has shot to 13,000 MW due to sultry weather, supply has been limited to 10,000 MW, thus leaving a gap of nearly 3,000 MW.
Rostering is being undertaken across the state, including VIP areas, to balance supply availability.
Chief Secretary Alok Ranjan called an emergency meeting and directed that the damage caused should be repaired immediately.
He directed that find solution to meet shortage of power due to closure of the unit and said that he should be informed about the causes behind damage to two transformers within a month, an official statement said.
He said that a new generator should be procured from Damodar Valley Corporation within a month and the closed unit be made operational.
The UPPCL officials said arrangements were being made to tackle the situation and that the government would take 370 MW power from Jammu, Himachal Pradesh and Delhi under "banking power quota".
Besides, an additional 500 MW power was being purchased from energy exchange, they said adding this is being made available from today itself.
Meanwhile, All India Power Engineers Federation has raised questions over the government's claim of arranging additional power.
It's chairman Shailendra Dubey said as of now additional power was not available in any of the state in the country.
He termed the two incidents of snag in transformers as laxity on the part of the plant management and said the government's claim of being able to provide 24 hour power supply by 2016 was "hollow."

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