Method of damping motion of a floating wind turbine
AssigneeVestas Wind Systems A/S
InventorsJesper Sandberg Thomsen, Alexander Duncan Giles, Ian Couchman
Life of this patent
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Abstract
A method of damping motion of a wind turbine, the wind turbine comprising a rotor and a floating platform. A motion signal is generated which is indicative of a motion of the wind turbine. A wind direction signal is generated which is indicative of a wind direction relative to the floating platform. A damping signal is generated on the basis of the motion signal and the wind direction signal, and the motion of the wind turbine is damped on the basis of the damping signal, for instance by adjusting the pitch of the rotor blades. A phase of the damping signal may be controlled on the basis of the wind direction signal.
Claims16
A method of damping motion of a wind turbine, the wind turbine comprising a rotor with a blade pitch angle and a floating platform, the method comprising:
- generating a motion signal which is indicative of a motion of the wind turbine;
- generating a wind direction signal which is indicative of a wind direction relative to the floating platform;
- generating a damping signal on the basis of the motion signal and the wind direction signal;
- and
- damping the motion of the wind turbine on the basis of the damping signal by controlling the blade pitch angle,
- wherein a phase or amplitude of the damping signal is controlled on the basis of the wind direction signal, and
- wherein generating the wind direction signal comprises:
- determining a yaw angle of the rotor relative to the floating platform;
- measuring a relative wind direction with a wind sensor, wherein the relative wind direction is indicative of a wind direction relative to the rotor;
- and generating the wind direction signal on the basis of the yaw angle and the relative wind direction.
A wind turbine control system, comprising:
- an input/output (I/O) interface;
- and
- at least one processor communicatively coupled to the I/O interface and configured to perform an operation, comprising:
- receiving, via the I/O interface, a motion signal indicative of a motion of a wind turbine;
- receive, via the I/O interface, a wind direction signal indicative of a wind direction relative to a floating platform of the wind turbine;
- generating a damping signal on the basis of the motion signal and the wind direction signal by controlling a blade pitch angle of a rotor of the wind turbine;
- and
- damping the motion of the wind turbine on the basis of the damping signal, wherein a phase or amplitude of the damping signal is controlled on the basis of the wind direction signal, and
- wherein generating the wind direction signal comprises:
- determining a yaw angle of the rotor relative to the floating platform;
- measuring a relative wind direction with a wind sensor, wherein the relative wind direction is indicative of a wind direction relative to the rotor;
- and generating the wind direction signal on the basis of the yaw angle and the relative wind direction.
A wind turbine, comprising:
- a rotor with a blade pitch angle;
- a floating platform;
- and
- a wind control system configured to perform an operation, comprising:
- receiving a motion signal indicative of a motion of a wind turbine;
- receive a wind direction signal indicative of a wind direction relative to the floating platform;
- generating a damping signal on the basis of the motion signal and the wind direction signal;
- and
- damping the motion of the wind turbine on the basis of the damping signal by controlling the blade pitch angle,
- wherein a phase or amplitude of the damping signal is controlled on the basis of the wind direction signal, and
- wherein generating the wind direction signal comprises:
- determining a yaw angle of the rotor relative to the floating platform;
- measuring a relative wind direction with a wind sensor, wherein the relative wind direction is indicative of a wind direction relative to the rotor;
- and generating the wind direction signal on the basis of the yaw angle and the relative wind direction.
Dependencies are inferred from the claim text.