Patent ID: 8217524
Filing Date: 2012-07-10
Classification: F03D,Y02E

Abstract:
1. A wind turbine generator comprising: a collective pitch angle producing means that produces a collective pitch angle demand that is common to blade pitch angles of a plurality of wind turbine blades; an individual pitch angle producing means that produces an individual pitch angle demand inherent in each of the wind turbine blades; a multiplying means that multiplies each individual pitch angle demand of the individual pitch angle producing means by an individual pitch angle gain; an individual pitch angle gain producing means that adjusts the individual pitch angle gain such that when shutdown is performed, an individual pitch angle gain is reduced gradually and reaches to zero after first set time; and an adding means that adds the collective pitch angle demand to a multiplication result carried out by the multiplying means, and supplies a resultant value to a pitch actuator inherent in each of the wind turbine blades.