Patent ID: 8901762

Claim:
A control method for a wind power generating system, the wind power generating system at least comprising a wind turbine, a control unit, and a load unit, the control method comprising: activating the control unit to determine an operation mode of the wind turbine; setting the wind turbine to operate under a normal mode, such that the wind turbine generates an electricity power according to a maximum power extraction curve; determining whether a rotational speed control condition is satisfied, and if so, switching the wind turbine from operating under the normal mode to operating under a rotational speed control mode, so as to limit the electricity power outputted from the wind turbine by a maximum power point shifting manner, and controlling the wind turbine to generate the electricity power according to a shift of the maximum power extraction curve ; and determining whether a speed of an external wind is greater than a predetermined wind speed, and if so, switching the wind turbine from operating under the rotational speed control mode to operating under a safety mode, so as to decrease a rotational speed of the wind turbine by a maximum torque extraction manner to protect the wind power generating system.