Wind turbines work on a simple principle: instead of using electricity to make wind—like a fan—wind turbines use wind to make electricity.
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Unlike a traditional generator, a DFIG is fed with electrical power on both the rotor and stator sides, allowing for two-way power flow.
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Wind turbines work on a very simple principle: the wind turns the blades, which causes the axis to rotate, which is attached to a generator, which produces electricity (typically variable-frequency AC, which is then converted via power electronics/inverters so it can be used.
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A perfectly efficient blade would capture all the energy in the wind passing through it, which, sadly isn't possible in the real world. Physics, in the form of Betz's Law, dictates a theoretical maximum efficiency of around 59.
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