Patent ID: 8674537
Filing Date: 2014-03-18
Classification: F03D,F05B,H05H,Y02E

Abstract:
1. A wind power generation system, comprising: a rotor having a hub and at least two or more blades attached to the hub; a nacelle pivotally supporting the rotor via a rotation shaft connected to the hub; a tower supporting the nacelle; an airflow generation device provided in a leading edge of each of the blades and having a first electrode and a second electrode which are separated via a dielectric; a voltage application mechanism capable of applying a voltage between the first electrode and the second electrode of the airflow generation device; and a control unit controlling at least the voltage application mechanism, wherein, when a flow separates and a stall occurs on a suction side of the blade by an increase of a wind velocity, in order to increase an output of the wind power generation system, the control unit controls the voltage applied by the voltage application mechanism to perform pulse modulation so that the value of a relational expression fC/U is 0.1 or larger and 9 or smaller where f is a pulse modulation frequency of the voltage, C is a chord length of the blades, and U is a relative velocity combining a peripheral velocity of the blades and a wind velocity, so as to generate plasma induced flow by the airflow generation device.