公开(公告)号：US20250059949A1

公开(公告)日：2025-02-20

申请号：US18720215

申请日：2022-12-14

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Jesper Sandberg THOMSEN ,  Anders Druedahl THURLOW ,  Alexander Duncan GILES ,  Yi HAN

IPC: F03D7/02

Abstract: A method for controlling a wind turbine to decrease blade deflection during tower passage is disclosed. A blade flap moment of the wind turbine blades is measured. A blade flap moment of the wind turbine blades and a rotor tilt moment in a situation where the pitch offset has not been added are estimated, based on the measured blade flap moment. In the case that the estimated blade flap moment exceeds a first activation threshold value and the estimated rotor tilt moment exceeds a second activation threshold value, individual pitch angle adjustment of the wind turbine blades is initiated by adding a pitch offset, at azimuth angles within an azimuth adjustment region corresponding to tower passage of the wind turbine blades.

公开(公告)号：US20220010773A1

公开(公告)日：2022-01-13

申请号：US17294660

申请日：2019-11-01

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Anders Druedahl THURLOW

IPC: F03D7/02

Abstract: The present invention relates to a method for stabilizing a rotor of a wind turbine during a time period following an abnormal grid event, the method comprising the steps of detecting an occurrence of the abnormal grid event, reducing an allowable rotor thrust from a first thrust limit to a second thrust limit, detecting that the abnormal grid event has ended, and maintaining the second thrust limit a selected time period after the abnormal grid event has ended. The present invention further relates to a wind turbine controller and a computer program product for performing this method.