NHPC’s Parbati Project Phase-II all units get operational
By Staff Report April 28, 2025 6:43 pm IST
By Staff Report April 28, 2025 6:43 pm IST
Parbati-II Hydroelectric Project, with a total installed capacity of 800 MW (4 x 200 MW), is a ‘run of the river’ project, in which small pondage has been constructed on the Parbati River in Kullu district of Himachal Pradesh.
NHPC has successfully completed the commercial operation of the last and fourth unit of Parbati Project Phase-II on 16th April. Earlier, on April 1st, three units of the project have successfully started commercial operation. With this, NHPC has completed the construction of this ambitious project of the country.
Parbati-II Hydroelectric Project, with a total installed capacity of 800 MW (4 x 200 MW), is a ‘run of the river’ project, in which small pondage has been constructed on the Parbati River in Kullu district of Himachal Pradesh. By constructing an 83.7 m high concrete gravity dam near Pulga village in Manikaran valley, the flow of Parbati River is diverted and the water is being taken to Sainj Valley through a 31.56 km long head race tunnel, where a power house has been constructed at Siund village. The total height of 863 m between Pulga and Siund is being utilised for generating 800 MW of power. The water flow of Parbati is further increased by the mixing of water from five nalas coming along the head race tunnel. The power house has 4 Pelton turbines of 200 MW each. The 31.56 km long HRT of the project is the longest hydroelectric tunnel in India. The two inclined pressure shafts, each 1545.5 m long, are the longest inclined pressure shaft tunnels in the world dug by Tunnel Boring Machine (TBM).
The State of Himachal Pradesh will get 12 percent free power from the project and the additional 1% free power will be used for Local Area Development Fund. The foundation stone of the project was laid by the then Prime Minister Atal Bihari Vajpayee on 12 December 1999. The Cabinet Committee on Economic Affairs (CCEA) approved the project cost of Rs. 3919.59 crore on 11.09.2002. The construction of the project started in September 2002. During construction the project has faced many challenges such as cloud burst, flash flood, back-slope failure, siltation with heavy discharge and shear zone etc. The estimated completion cost of the project is Rs. 13,045 crore. The design energy of the project is 3074 million units (MU). With the commissioning of this project the generation capacity of Parbati-III power station of 520 MW capacity will also increase by 1262 million units per annum.
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