US 11,754,043 B2
Method and system for controlling a wind turbine to reduce nacelle vibration
Keld Hammerum, Hadsten (DK); and Jesper Sandberg Thomsen, Hadsten (DK)
Assigned to VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
Appl. No. 17/56,395
Filed by VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
PCT Filed May 8, 2019, PCT No. PCT/DK2019/050146
§ 371(c)(1), (2) Date Nov. 17, 2020,
PCT Pub. No. WO2019/219137, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. PA 2018 70303 (DK), filed on May 17, 2018.
Prior Publication US 2021/0207584 A1, Jul. 8, 2021
Int. Cl. F03D 7/02 (2006.01); F03D 7/04 (2006.01)
CPC F03D 7/0296 (2013.01) [F03D 7/0224 (2013.01); F03D 7/042 (2013.01); F05B 2240/21 (2013.01); F05B 2270/328 (2013.01); F05B 2270/334 (2013.01); F05B 2270/404 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of controlling a wind turbine comprising a tower supporting a rotor comprising a plurality of pitch-adjustable rotor blades, the method comprising:
obtaining a movement signal indicative of a vibrational movement of the tower;
determining an actuator signal based on the movement signal, the actuator signal being determined to produce a desired force to counteract the vibrational movement of the tower;
determining a pitch reference offset signal for each one of the plurality of pitch-adjustable rotor blades based on the actuator signal;
applying an integration of the pitch reference offset signals;
determining modified pitch reference offset signals based on the integrated pitch reference offset signals;
determining a pitch signal for each one of the plurality of pitch-adjustable rotor blades based on the modified pitch reference offset signals; and
adjusting a pitch of the plurality of pitch-adjustable rotor blades based on the respective determined pitch signals.