Introduction: Hydro Power station
A hydro power station uses potential energy of water at high level for generating electrical energy.
This power station is generally located in hilly areas where dams can be built conveniently and large water reservoirs can be obtained. This kind of power station can be used to produce large amounts of electrical energy. In most countries these power stations are used as peak load power stations. This is because they can be started and stopped easily and fast.
The water from the dam is lead to the water turbine through the penstock. Here the hydraulic energy of water is converted to rotational mechanical energy by the turbine. The turbine is connected to the generator through the turbine shaft and hence mechanical energy is converted into electrical energy by the generator.
Pros & Cons: what this power station presents
|Requires no fuel, thus called clean power station
||Very high capital cost for dam construction
|Small running charges and no need for specialised manpower
||Uncertainty about availability of huge amounts of water
|Simple construction & requires less maintenance
||Skilled personel required for construction
|Very robust & has long life
||High cost of transmission line as plant is located in hilly areas.
|Also used for flood control and irrigation
||Impacts native watershed ecology
Future generations will want to depend more on this type of electricity generating power station (and other renewable energy sources), due to a fast increasing depletion of fuels(Coal). There are a number of construction projects currently underway for this kind of power station around the world.