US 12,331,723 B2
Floating wind turbine control below rated wind speed
Bjørn Skaare, Trondheim (NO)
Assigned to EQUINOR ENERGY AS, Stavanger (NO)
Appl. No. 18/258,590
Filed by EQUINOR ENERGY AS, Stavanger (NO)
PCT Filed Dec. 15, 2021, PCT No. PCT/NO2021/050266
§ 371(c)(1), (2) Date Jun. 21, 2023,
PCT Pub. No. WO2022/139586, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 2020428 (GB), filed on Dec. 22, 2020.
Prior Publication US 2024/0183333 A1, Jun. 6, 2024
Int. Cl. F03D 7/02 (2006.01); F03D 7/04 (2006.01); F03D 17/00 (2016.01)
CPC F03D 7/0224 (2013.01) [F03D 7/042 (2013.01); F03D 17/006 (2023.08)] 16 Claims
OG exemplary drawing
 
1. A motion controller for a floating wind turbine comprising a plurality of rotor blades, wherein the motion controller is arranged to adjust the blade pitch of each rotor blade when the floating wind turbine is operating in winds below the rated wind speed so as to create a net force that damps a surge motion of the floating wind turbine, wherein:
the controller is arranged to calculate the blade pitch adjustment of one or more of the rotor blades based on an input of the surge motion;
the input of surge motion is based on a measurement and/or estimation of the surge velocity of the floating wind turbine; and
the blade pitch adjustment is directly proportional to the surge velocity.