According to the IEX data, the previous high was recorded at Rs 17 per unit in August 2009.
A total of 271 MU (million units) were sold for supply on Monday. In the DAM trading session concluded Sunday at IEX, there were buy bids for 306 MU against sell bids for 357 MU.
Power Secretary A K Bhalla last week had said that around this time of the year wind energy suddenly goes down and hydro also starts declining that is where some constraints always come in.
"We were not able to build coal stocks in power plants especially in northern states," he had said.
The source said captive power plants (CPPs) were grappling with the issue of coal shortage. CPPs generate electricity for their own manufacturing facilities like steel, cement and others.
According to the Central Electricity Authority data, as many as 19 thermal plants had coal stocks of less than seven days of consumption as on September 27.
Last Thursday, Power Minister R K Singh had asked state power generators like NTPC and DVC to strengthen their coal mining wing and secure more coal mines noting that supply of the dry fuel to power plants was still a concern.
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