Wind turbine and wind turbine rotor pitch control method

摘要

At the present invention, a pitch controller (111), uninterruptible power supply (112), and rotational speed detector (114) are disposed in the rotor (1) in a wind turbine. When a slip ring failure or wire breakage occurs, the pitch controller (111) internally creates a pitch angle command so as to control the pitch angle.

<Paragraphs id="pa02" num="0002" xmlns:base="http://www.sipo.gov.cn/XMLSchema/base">Accordingly, even if the slip ring (7) between the rotor (1) and nacelle (2) fails in the wind turbine, pitch angle control is performed reliably.