Wind Turbine Generator
29 April 2012
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The principle behind how a wind turbine generator works is its ability to change mechanical energy into electrical energy. This type of generator is not similar to the typical generating machines which are attached to an electrical source or grid. A turbine generator on the other hand, requires wind as its power source and this must work with the wind turbine rotor resulting in torque or mechanical power which is fluctuating by nature.
On big wind turbines, the voltage produced is around 700 V three-phase AC. This voltage either passes through a transformer located within the tower or beside the wind turbine to increase it to 10,000 up to 30,000 volts. This will still depend on the electrical grid used.
Most manufacturers will provide a 50 Hz wind turbine as well as 60 Hz type of turbine which are commonly used in America.
While working, generators will require cooling. Cooling is usually accomplished by placing the generator in a duct with the use of a big fan to produce the cooling effect. Meanwhile there are a few companies which make use of a water cooled generator. The size of a water cooled generator is compactly designed, increasing electrical efficiency.
This is not possible unless a radiator is placed in the nacelle to remove the heat from the generator through the liquid cooling process.
Every thing that is mentioned here are just the basics of how a standard turbine generator works. It may still vary depending on the design of the manufacturers.
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