RusHydro has commissioned a new unit which has added 640 MW in capacity to the company’s Sayano-Shushenskaya hydropower plant, the largest hydro plant in Russia and the sixth largest in the world.

The current working capacity of Sayano-Shushenskaya is 3200 MW, with five 640 MW units in operation. Assembly of a new unit is underway.

Two of the four old units were restored after an accident in 2009, which resulted in the engine and turbine rooms being flooded after a transformer explosion. These units have been decommissioned and will be replaced by new ones. 

A rehabilitation plan plant calls for commissioning three hydro-units per year until 2014. Eventually, the plant will be fully equipped with new equipment with enhanced performance characteristics that meet all safety and reliability requirements.

Power Machines and RusHydro entered into a contract to produce basic power equipment to restore the plant in November 2009.

Power Machines will produce 10 hydropower turbines, nine 640 MW hydropower generators and six excitation systems.