CONTROL DEVICE FOR WIND TURBINE DEVICE, WIND TURBINE DEVICE, AND METHOD FOR CONTROLLING WIND TURBINE DEVICE

摘要

A wind turbine device is configured so that, when the blades are subjected to wind having an output reduction start wind speed lower than a conventional cut-out wind speed which is the speed at which torque acting on the main shaft is the limit of torque, torque reduction control is performed so that the torque does not exceed the limit of torque at the conventional cut-out wind speed, the torque reduction control being control which makes changes in the torque before and after the output reduction start control different. In the wind turbine device, for example, if the speed of wind to which the blades are subjected reaches the output reduction start wind speed, the slope of a change in the torque is reduced to a degree less than the slope before the output reduction wind speed is reached. Consequently, in the wind turbine device, even if wind to which the blades are subjected is strong, a load acting on equipment is reduced and a reduction in the output is minimized.