Method and apparatus to protect wind turbines from extreme events

摘要

Control system for a wind turbine, comprising: a detection device (20) mounted on the wind turbine to detect the wind speed in a windward position of the wind turbine; a controller for receiving and processing signals from the detection device to detect an extreme windward windward operating burst of the wind turbine, and to generate one or more control signals to vary a wind turbine operating parameter in response to the extreme operating burst detected, characterized in that the controller comprises a differentiator (85) to differentiate a measurement of the detected wind speed, and a filter (90) to filter the differentiated signal, and in which the controller is configured to detect the extreme operating burst when , as determined by the filter, the output of the differentiator exceeds (95) a predetermined value for a predetermined period of time.