Wind Turbine and Method for Controlling the Electrical Moment of a Wind Turbine by Closed-Loop Control in the Event of a Grid Fault
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United States of America Patent
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Issued Date -
Nov 19, 2015
app pub date -
Dec 16, 2013
filing date -
Dec 20, 2012
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Abstract
The invention relates to a method for controlling the electrical moment of a wind turbine by closed-loop control in the event of a grid fault. A fall in voltage that is outside the limits of normal operation is discovered. A moment closed-loop controller which determines a target value for the electrical moment of the wind turbine, is operated. A moment ramp is initialized. The target value of the moment closed-loop controller is compared with the moment ramp and the lesser value is selected as a moment setpoint value. The electrical moment of the wind turbine is set on the basis of the moment setpoint value. The invention additionally relates to a wind turbine suitable for implementing the method. The invention makes it possible, on the one hand, to achieve a rapid restoration of the power after the end of the grid fault, while, on the other hand, the loads for the wind turbine are kept within limits.
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