Indiaâs largest hydropower project undergoes test run - The Hindu

GUWAHATIOne of the eight units of Indiaâs largest hydropower project, which straddles the Arunachal Pradesh-Assam border, has begun undergoing a test run, signalling its commissioning soon.Officials of the NHPC Limited said the wet commissioning of the first 250 megawatt unit of the 2,000 MW Subansiri Lower Hydroelectric Project was commenced on Friday (October 24, 2025).âWet commissioning is basically a test run of the turbine to check several parameters without generating electricity. The test run with water flow may take four to five days,â an NHPC spokesperson told The Hindu on Saturday (October 25).The Subansiri Lower project has eight units of 250 MW each. âFour of these units are ready for test runs.