公开(公告)号：US20160032890A1

公开(公告)日：2016-02-04

申请号：US14782272

申请日：2014-04-22

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Keld HAMMERUM

IPC: F03D7/02

CPC classification number: F03D7/0224 ,  F03D7/024 ,  F03D7/0264 ,  Y02E10/723

Abstract: A method for controlling a wind turbine during shutdown is disclosed, said wind turbine comprising a rotor carrying at least three wind turbine blades adapted to be pitched individually. A first shutdown strategy is initially selected, and subsequently a second shutdown strategy is selected, the second shutdown strategy ensuring alignment of the pitch angles of the wind turbine blades. The time for switching from the first shutdown strategy to the second shutdown strategy is calculated on the basis of a misalignment of the pitch angles, and in order to align the pitch angles before an estimated point in time where the pitch angles must be aligned, in order to avoid excessive asymmetric loads on the wind turbine blades and/or on the rotor. According to an alternative embodiment, the first shutdown strategy includes moving the wind turbine blades towards a feathered position at identical pitch rates.

Abstract translation: 公开了一种用于在关闭期间控制风力涡轮机的方法，所述风力涡轮机包括承载至少三个风力涡轮机叶片的转子，其适于单独倾斜。 首先选择第一关闭策略，随后选择第二停机策略，第二停机策略确保风力涡轮机叶片的俯仰角的对准。 基于俯仰角的未对准来计算从第一关闭策略切换到第二关机策略的时间，并且为了在俯仰角必须对准的估计时间点之前对准俯仰角， 以避免风力涡轮机叶片和/或转子上的过大的不对称负载。 根据替代实施例，第一关闭策略包括以相同的俯仰速率将风力涡轮机叶片朝向顺桨位置移动。