"Ministry of Power vide letter dated November 22, 2016 has accorded approval for continuation of the Payment Security Mechanism beyond October 31, 2016," NTPC said in a BSE filing.
The tripartite PSM agreement among power generators, states and Reserve Bank of India is executed to ensure payments in case of default.
It guarantees that in case of payment default by the discoms, the due amount will be deducted from the centre's devolution to the states.
"The term of the PSM with NTPC, states and RBI was expiring on October 31, 2016. A large number of states have already come on board to ink the new PSM," an official said.
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The discoms had a debt of Rs 4.37 lakh crore with annual losses of over Rs 60,000 crore when UDAY was launched last year.
In a recent reply to Rajya Sabha, Power Minister Piyush Goyal said that as many as 17 states have joined UDAY scheme.
The scheme allows states to pay debt of discoms along with their electricity boards by issuing bonds.
In the present scenario, PSM will provide payment security to the state-run NTPC and help in its expansion plans.