The modernisation project, which begins in the next financial year, would be spread over 3-4 years, NTPC Limited Regional Executive Director (North) Sharad Anand said.
A power plant ideally needs to be upgraded after 25 years to maintain optimum output and efficiency. The first unit of Singrauli plant was commissioned more than 30 years ago and it needs renovation, he said.
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Meanwhile, more thermal units are either proposed in existing plants or greenfield power plants in UP totaling about 4,500 Mw.
This includes 1,320-Mw plant (2x660 Mw) at Meja in Allahabad district through a joint venture with UP Rajya Vidyut Utpadan Nigam. While civil work is in progress, an additional 1,320 Mw (2x660 Mw) is also proposed there.
Similarly, capacity addition of 1,320 Mw (2x660 Mw) is proposed at Tanda II and land acquisition for that is in progress, he said.