OVERVOLTAGE PROTECTION SELF-TRIGGER CIRCUIT FOR DOUBLE FED INDUCTION GENERATOR (DFIG) WIND POWER SYSTEM
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Jul 2, 2014
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Jul 2, 2014
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Provided is an overvoltage protection device for protecting a wind turbine against overvoltage. The device includes a double fed induction generator (DFIG) including a rotor connection including a plurality of electrical connections coupled to rotor leads of the DFIG and a stator connection including a plurality of electrical connections coupled to stator leads of the DFIG. Also included is a self-triggering circuit coupled with the rotor connection and operative in response to changes in a utility grid voltage during a grid fault when an overvoltage event is detected such that the overvoltage protection circuit automatically operates, independently of a controller or a sensor, to reduce the detected overvoltage to a predetermined voltage level.
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