Performance of Francis Turbine and Hydro Electric Governing

The Main requirement for hydro-electric power plant is the availability of water in huge quantity at sufficient head and this requirement can be met by constructing a dam across a river. A storage reservoir is formed by constructing a dam across Krishna River. Near the bottom of the dam, there is a water intake. Trash Racks of 38meteis long are provided at the water intake to prevent the ingress of floating and other materials to the turbine. A Power tunnel of 720m long and diameter of 50 feet is taken off from the reservoir to the valve house at the start of Penstock. From the reservoir the water is carried to valve house through power tunnel and from valve house to the water Turbine through pipes of large diameter 6.10m made of steel or reinforced concrete, called the Penstock. The shaft from the turbine goes up into the 3-phase Alternator of capacity 122000KVA, which produces the power. The water after having done its useful work in the turbine is discharged to the tail race which may lead it to the river. The Srisailam Power plant has the capacity of 7×110 MW. To control the water flow so the other alternative governor is Electro Hydraulic Governor -100. Electro Hydraulic Governor -100 can operate very efficiently