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Control of the rotational speed of a wind turbine which is impeded to export electrical power to an electricity network

  • US 8,334,607 B2
  • Filed: 12/07/2009
  • Issued: 12/18/2012
  • Est. Priority Date: 12/08/2008
  • Status: Active Grant
First Claim
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1. A device for controlling the rotational speed of a rotor of a wind turbine that feeds electrical power into an electricity network, the device, comprising:

  • a first input node for receiving a first signal, the first signal is indicative of an actual rotational speed of the rotor;

    a second input node for receiving a second signal, the second signal is indicative of a reference rotational speed for the rotor;

    a detection unit for detecting a defective operational state in which the wind turbine is impeded to export electrical power to the electricity network;

    a control unit for providing a reference signal for a characteristic operational parameter of the wind turbine based on the first signal and based on the second signal, the characteristic operational parameter is indicative of the rotational speed of the rotor wherein the control unit includes a proportional control element and an integral control element; and

    a pulse generator connected to the output of the detection unit and to the integral control element and is adapted to send a kick pulse to the integral control element in response to the detection of the defective operational state.

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