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© P. Kundur

WTG -  14

Examples of Fault Ride-Through Capability

Temporary reduction of active power:

Active Power is ramped down for a predefined time and then ramped up again to prefault value

This stabilizes wind turbine during the fault and reduces the current in the rotor converter

Disadvantage: rotor can speed up causing overspeed protection to trip turbine

handled by the pitch controller

Temporary reduction of active power with reactive power boosting:

Increases terminal voltage

Improves system stability

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