Patent ID: 8116914
Filing Date: 2012-02-14
Classification: F03D,F05B,Y02E

Abstract:
1. A wind turbine including a pitch controller, a turbine controller, and a first uninterruptible power supply, the turbine controller having a function for creating a pitch angle command according to a quantity of the state of the wind turbine, a power output of the first uninterruptible power supply being connected to a power input of the turbine controller, wherein: the wind turbine has a second uninterruptible power supply; a power output of the second uninterruptible power supply is connected to a power input of the pitch controller; the pitch controller includes a pitch angle command creating unit that has a function of changing a pitch angle according to a pitch angle command received from the turbine controller and another function of creating a pitch angle command internally, according to a reception error detected based on the pitch angle command received or a voltage drop of electric power supplied to the second uninterruptible power supply; and the pitch controller has a selector for making a switchover between the pitch angle command created by the turbine controller according to the quantity of the state of the wind turbine and the pitch angle command internally created by the pitch controller.