Floating wind turbine control below rated wind speed
AssigneeEquinor Energy AS
InventorBjørn Skaare
Life of this patent
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Abstract
A motion controller for a floating wind turbine including a number of rotor blades is provided. 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. Also provided is a method of damping the motion of a floating wind turbine and a wind turbine having such a motion controller.
Claims16
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.
A method of controlling a floating wind turbine comprising a plurality of rotor blades, the method comprising:
- inputting to the controller an input of the surge motion of the floating wind turbine;
- adjusting the blade pitch of each rotor blade based on the input of the surge motion when the wind turbine is operating in wind speeds below the rated wind speed so as to create a net force that damps a surge motion of the floating wind turbine, wherein:
- 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.
Dependencies are inferred from the claim text.