Patent ID: 8450867
Filing Date: 2013-05-28
Classification: F03D,F05B,Y02E

Abstract:
1. A wind turbine generator comprising: a nacelle in which a wind turbine rotor is mounted; a rotating mechanism that performs yaw rotation of the nacelle; a wind direction measuring means that measures a wind direction; and a controller that controls the rotating mechanism, characterized in that the controller calculates the wind direction deviation from the direction of the wind turbine rotor and the wind direction measured by the wind direction measuring means, and performs yaw rotation of the nacelle by the rotating mechanism when any one of the following conditions (1) and (2) is satisfied, the conditions (1) and (2) include (1) a state where the absolute value of the wind direction deviation is not less than a first threshold (or a state where the absolute value of the wind direction deviation exceeds a first threshold) continues for a predetermined first duration, and (2) a state where the absolute value of the wind direction deviation is not less than a second threshold larger than the first threshold (or a state where the absolute value of the wind direction deviation exceeds a second threshold) continues for a second duration shorter than the first duration, and assuming that the current time is denoted by t