US 12,135,013 B2
De-rating wind turbine tower lateral oscillation control
Nicolaj Winther Johansen, Hinnerup (DK); Poul Brandt Christensen, Ry (DK); Brian Ank Mertz, Aarhus C (DK); and John Schwensen, Aarhus N (DK)
Assigned to VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
Appl. No. 18/004,957
Filed by VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
PCT Filed Jul. 1, 2021, PCT No. PCT/DK2021/050220
§ 371(c)(1), (2) Date Jan. 10, 2023,
PCT Pub. No. WO2022/008016, PCT Pub. Date Jan. 13, 2022.
Claims priority of application No. PA 2020 70476 (DK), filed on Jul. 10, 2020.
Prior Publication US 2023/0235725 A1, Jul. 27, 2023
Int. Cl. F03D 7/02 (2006.01)
CPC F03D 7/0224 (2013.01) [F03D 7/0264 (2013.01); F03D 7/0296 (2013.01); F05B 2270/328 (2013.01); F05B 2270/329 (2013.01); F05B 2270/334 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of controlling operation of a wind turbine having a tower, the method comprising:
determining an overall control output according to a wind turbine control strategy and based on monitored operation of the wind turbine, the overall control output including rotor load control for reducing asymmetric loading on a rotor of the wind turbine and lateral oscillation control for dampening lateral oscillation of the tower;
using the determined overall control output to control operation of the wind turbine;
receiving lateral oscillation sensor data indicative of a level of lateral oscillation of the tower;
determining a rated lateral oscillation control output in dependence on the received lateral oscillation sensor data; and
receiving an indication of a yaw error of the wind turbine, wherein:
the yaw error is a misalignment of a rotor plane of the wind turbine relative to a wind direction in a vicinity of the wind turbine; and
a lateral oscillation control output included in the overall control output is determined to be de-rated from the rated lateral oscillation control output when the indicated yaw error of the wind turbine is above a predetermined lower threshold level in order to prioritize the rotor load control over the lateral oscillation control.