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Which type of generator are made use in wind turbines?

(a) Recreational generators

(b) Synchronous generator

(c) Asynchronous generator

(d) Alternator

I got this question in a job interview.

This key question is from Components of Wind Energy Conversion System topic in chapter Wind Energy of Energy Engineering

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Correct answer is (b) Synchronous generator

Easy explanation: Generators may be either constant or variable speed type. Variable speed units are expensive and/or unproved. Constant speed generator in use are synchronous induction and permanent magnet types. Synchronous unit is used for large aero generator systems. It is very versatile and has an extensive data base.

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