Blade pitch controller for a wind turbine
AssigneeEquinor Energy AS
InventorsBjørn Skaare, Emil Smilden
Life of this patent
Estimating the term…
Abstract
A blade pitch controller for a wind turbine includes a nominal control system and a tower feedback loop. The tower feedback loop includes a filtering system. The filtering system is arranged to control wind turbine blade pitch so as to provide additional effective stiffness to the wind turbine in response to motion of the wind turbine which is above a filter frequency of the filtering system.
Claims19
A blade pitch controller for a wind turbine, wherein the wind turbine comprises an elongate tower with a nacelle and a rotor attached to the upper end of the tower, the rotor comprising a plurality of blades, wherein the blade pitch controller comprises a nominal control system arranged to control the blade pitch of the wind turbine in order to optimise power production and a tower feedback loop, wherein the tower feedback loop comprises a filtering system and a feedback controller, wherein the filtering system is arranged to receive at least one of position and velocity measurements or estimates of the wind turbine as input and to output at least one of filtered position and velocity measurements or estimates of the wind turbine, and the feedback controller is arranged to receive at least one of the output filtered position and velocity measurements or estimates of the wind turbine from the filtering system and to output a blade pitch reference signal determined from at least one of the filtered position and velocity measurements or estimates of the wind turbine to the nominal control system, such that the tower feedback loop is arranged to control wind turbine blade pitch so as to provide additional effective stiffness to the wind turbine in response to motion of the wind turbine above a filter frequency of the filtering system.
A tower feedback controller for a blade pitch controller for a wind turbine, wherein the wind turbine comprises an elongate tower with a nacelle and a rotor attached to the upper end of the tower, the rotor comprising a plurality of blades, wherein the tower feedback controller comprises a filtering system, wherein the filtering system is arranged to receive at least one of position and velocity measurements or estimates of the wind turbine as input and to output at least one of filtered position and velocity measurements or estimates of the wind turbine, and the feedback controller is arranged to receive at least one of the output filtered position and velocity measurements or estimates of the wind turbine from the filtering system and to output a blade pitch reference signal determined from at least one of the filtered position and velocity measurements or estimates of the wind turbine to a nominal control system arranged to control the blade pitch of the wind turbine in order to optimise power production, such that the filtering system is arranged to control wind turbine blade pitch so as to provide additional effective stiffness to the wind turbine in response to motion of the wind turbine above a filter frequency of the filtering system.
Dependencies are inferred from the claim text.