US 12,066,007 B2
Floating wind turbine blade pitch adjustment for wave activity
Jared Frank, Longmont, CO (US); Srinivas Guntur, Boulder, CO (US); and Marco Masciola, Louisville, CO (US)
Assigned to Siemens Gamesa Renewable Energy A/S, Brande (DK)
Appl. No. 17/770,768
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed Oct. 22, 2020, PCT No. PCT/EP2020/079779
§ 371(c)(1), (2) Date Apr. 21, 2022,
PCT Pub. No. WO2021/078873, PCT Pub. Date Apr. 29, 2021.
Application 17/770,768 is a continuation of application No. 16/664,567, filed on Oct. 25, 2019, granted, now 11,306,700, issued on Apr. 19, 2022.
Prior Publication US 2022/0412309 A1, Dec. 29, 2022
Int. Cl. F03D 7/02 (2006.01); F03D 9/30 (2016.01)
CPC F03D 7/0224 (2013.01) [F03D 9/30 (2016.05)] 19 Claims
OG exemplary drawing
 
8. A method for reducing loads induced by ocean waves on a floating wind turbine, the method comprising:
filtering, by the processor, an error signal in a frequency range attributable to ocean wave activity to eliminate frequencies contributing to the error signal that are not attributable to ocean wave activity, resulting in a filtered error signal, wherein the error signal is a difference between a value associated with a tower bottom moment, which is a moment at a platform top of the floating wind turbine as a result of environmental loads, and a value associated with a thrust moment, which is a moment defined by a thrust force of rotor blades of the floating wind turbine at a location at a tower section of the floating turbine proximate the platform top;
converting, by the processor, the filtered error signal to a pitch offset signal; and
adjusting, by the processor, a blade pitch angle of at least one rotor blade of the floating wind turbine according to the pitch offset signal.