US 12,435,701 B2
Method for determining a blade misposition of a rotor blade of a rotor of a wind power installation through azimuthal movement
Ulf Schaper, Staffhorst (DE); Wolfgang de Boer, Moormerland (DE); Dennis Gäbel, Meppen (DE); Rainer Kuhlemann, Westoverledingen (DE); and Wenzel Laska, Aurich (DE)
Assigned to Wobben Properties GmbH, Aurich (DE)
Filed by Wobben Properties GmbH, Aurich (DE)
Filed on Aug. 8, 2023, as Appl. No. 18/446,354.
Claims priority of application No. 22189550 (EP), filed on Aug. 9, 2022.
Prior Publication US 2024/0052811 A1, Feb. 15, 2024
Int. Cl. F03D 17/00 (2016.01)
CPC F03D 17/029 (2023.08) [F05B 2260/83 (2013.01); F05B 2270/328 (2013.01); F05B 2270/329 (2013.01); F05B 2270/802 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for determining a blade misposition of a rotor blade of a rotor of a wind power installation having multiple rotor blades with an adjustable blade angle, the method comprising:
detecting an azimuthal movement of a nacelle of the wind power installation, the nacelle having a rotor and an azimuth adjustment device, the azimuth adjustment device having at least one activable azimuth actuator configured to adjust an azimuthal position of the nacelle, wherein the detecting of the azimuthal movement of the nacelle occurs while the at least one azimuth actuator is inactive; and
determining the blade misposition on the basis of the detected azimuthal movement,
wherein the blade misposition describes a blade angle variance of the blade angle of the rotor blade from a reference blade angle,
wherein a circumferential rotational position of the rotor is referred to as the rotor position,
wherein a recorded azimuth response is evaluated by recording an integral over the recorded azimuth response, and
wherein the integral is used to determine an amplitude of an assumed sinusoidal azimuth response.