Hydroelectric power plant can be used for many purposes like electrical power generation, controlling of floods, storing of irrigation water and storing of drinking water. The main advantage of hydroelectric power plant compared to other power plants is that fuel is not required here. A hydroelectric power plant remains very neat and clean always. Operational and maintenance cost is very less. Rapid load variation possible here with a longer life span. Highly skilled engineers are not an essential requirement here. There are no standby losses in hydroelectric power plants. We can easily maintain constant speed and frequency. But construction cost is very high. It takes more time for installation. Long transmission lines are required and we have to depend on monsoon. It consumes large area. The main components of a hydroelectric plant are generator, switchgear, transmission lines, catchment area, reservoir, dam and head works, sluice gate or valve, penstock, inlet valve, turbine and tail race.
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