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what is the difference between the AC generator used in power stations and normal AC generators?

In normal AC generators, an AC current is generated by turning the coils of the generator in a magnetic field. The magnetic field was produced by two stationary permanent magnets. In a power plant generator, however, the conducting coils are stationary and it is the magnets that are turned. Also, the magnetic field in power plant generators is produced by electromagnets (instead of permanent magnets) with current supplied by an external power source. The functioning of the coils and electromagnets in power plant generators to produce a high AC output are very complex than those found in school laboratories.


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