| 摘要 |
A variable speed wind turbine (1) is provided. The wind turbine comprises a generator (101), a power converter (102)for converting at least a portion of electrical power generated by the generator wherein the power converter (102) comprises a generator side converter (110), a grid side converter (111) and a DC link (112) therebetween, a power dissipating unit (105) operatively coupled to the DC link (112) and a controller (121). The controller is adapted to determine power extracted from the wind, power supplied by the wind turbine and power loss in the power dissipating unit, determine the difference between the power extracted from the wind and the sum of the power supplied by the wind turbine and the power loss in the power dissipating unit and activate the power dissipating unit when the difference between the power exceeds a predefined power difference threshold. |
