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ABOUT HYDROELECTRIC POWER PLANTS:

About Hydro

PES in Hydro

PES in Electro


 Gerusoppa dam powerhouse showing                  penstocks



Hydroelectric power plants generate electrical power by using the force of falling water. Hydroelectric plants consist of the following components.


  a dam to hold back water and create a     water      reservoir


  intake gates at the bottom of the dam

  a penstock (also called as steel liners or pressure shafts, depending on     the application), is a conduit for water from the reservoir to flow downward to     the turbine propeller with the force of gravity

  a turbine, with propeller blades attached to a shaft so that the shaft rotates when
    the blades move with the force of falling water. The shaft is attached to the
    generator.

  a generator, that generates electricity when the shaft rotates a series of     magnets (the rotor). The rotor rotates past coils of copper (the stator) wound     outside it. A magnetic field is created between the coil and the magnets, thereby     producing alternating current by moving electrons

  a transformer inside the powerhouse that converts this alternating current into a
    higher voltage current

  power lines that carry the electricity.

  Hydroelectric power plants are built on rivers where there is sufficient drop in   elevation. Hydroelectric power is a renewable source that is non-polluting, has a long   life, lower costs of generation and operation, is more efficient and provides other   benefits such as irrigation, flood control and water supply.

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