US 12,352,242 B2
Determining tower to tip clearance for a wind turbine
Johannes Gerhardes Alberts, Brøndby Strand (DK); and Bjarne Skovmose Kallesøe, Bagsværd (DK)
Assigned to SIEMENS GAMESA RENEWABLE ENERGY A/S, Brande (DK)
Appl. No. 18/276,418
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed Jan. 20, 2022, PCT No. PCT/EP2022/051268
§ 371(c)(1), (2) Date Aug. 8, 2023,
PCT Pub. No. WO2022/175017, PCT Pub. Date Aug. 25, 2022.
Claims priority of application No. 21158131.9 (EP), filed on Feb. 19, 2021.
Prior Publication US 2024/0110546 A1, Apr. 4, 2024
Int. Cl. F03D 7/02 (2006.01)
CPC F03D 7/0288 (2013.01) [F05B 2270/17 (2013.01); F05B 2270/33 (2013.01); F05B 2270/802 (2013.01); F05B 2270/808 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of determining a distance between a rotor blade tip and a tower of a wind turbine, the method comprising:
estimating the distance based on a strain measurement;
measuring the distance;
correcting an estimation procedure based on the estimated distance and the measured distance; deriving a corrected distance based on the corrected estimation procedure; and
changing a blade pitch angle to reduce lift when the corrected distance is not in an allowed range,
wherein correcting the estimation procedure comprises:
forming a ratio of the estimated distance and the measured distance; and
calculating at least one correction parameter based on the ratio.