Control device for wind power systems having power failure detection
AssigneeREpower Systems AG
InventorThomas Krueger
Life of this patent
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Abstract
A wind energy installation control device includes a wind rotor, a generator driven by the wind rotor, a torque control unit configured to control a torque of the generator, and a control system. The control system includes a detector configured to identify a grid dip and an end of the grid dip, a residual torque transmitter configured to provide a set point for a torque of the generator after identification of the grid dip, and an initializer configured to initialize a component of the torque control unit at the set point. Accordingly, upon return of grid power after a grid dip, the vibration behavior of a wind power system can be significantly improved. Overload of a drive train upon return of grid voltage can thus be reduced.
Claims19
A wind energy installation control device, comprising:
- a wind rotor;
- a generator driven by the wind rotor;
- a torque control unit configured to control a torque of the generator;
- and
- a control system comprising a detector configured to identify a grid dip and an end of the grid dip, a residual torque transmitter configured to provide a set point value for a torque of the generator after identification of the grid dip, wherein the set point value is closer to the saturation limit of the torque control unit than the set point value being used before the grid dip, and an initializer configured to initialize a component of the torque control unit at the set point value.
A method of operating a wind energy installation having a generator driven by a wind rotor for producing and feeding electrical energy into a grid and a control device with a torque control unit, comprising:
- identifying a grid dip and a return of grid voltage;
- determining a set point value for a torque of the generator after identification of the grid dip, wherein the set point value is closer to the saturation limit of the torque control unit than the set point value being used before the grid dip;
- and
- initializing a component in the torque control unit at the set point value.
Dependencies are inferred from the claim text.