ABB

Uri station enters service

Issue 2 and Volume 5.

Uri station enters service

The first generator of the 540 MW Uri hydro power station began delivering electricity to India?s national grid through the Wagoora substation toward the end of 1996, with the remaining three units to enter commercial operation in intervals, with the last due to be on-line by May.

The plant, owned by National Hydro Power Corp., is sited on the Hjelum River. ABB received a turnkey contract in November 1989 to supply the electrical plant for the station. When complete, the plant will comprise four units, each with 135 MW Francis hydro turbines and ABB generators. The Uri plant is being constructed on a fast schedule, with total plant completion planned in six years. This is a short time frame for an underground hydropower project of such magnitude. The plan requires 17 km of tunnels, an underground power house and underground transformer. The station is a Orun-of-the-riverO design and does not require a large dam. Instead, a portion of the river will be diverted into desilting basins before it enters into a headrace tunnel. Then 11 km downstream, the water will be rushed in vertical penstocks toward the turbines, located at a depth of 280 meters. After passing through the turbines, the water will flow into a tailrace tunnel before it is channeled back into the river.