Control method for a wind turbine
AssigneeVestas Wind Systems A/S
InventorsJohnny NIELSEN, Brian Lembcke Melgaard
Life of this patent
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Abstract
A control system for yawing a wind turbine rotor relative to the wind and for changing the pitch of rotor blades. A wind direction parameter is measured by a wind direction sensor. The wind direction is calibrated as a function of a predetermined offset parameter, and then adjusted as a function of a wind direction compensation parameter. The adjusted relative wind direction is then used in the determining of a control parameter of the wind turbine. The parameters for the calibration and adjustment of the relative wind direction are obtained from a set of data comprising the wind direction relative to the wind turbine over time and as measured by the wind direction sensor on the wind turbine and as measured by a second wind direction sensor.
Claims20
A method of controlling a wind turbine, the wind turbine comprising a wind direction sensor, a number of pitch-adjustable rotor blades, a yawing system, and a control system for yawing the wind turbine rotor relative to the wind and for changing the pitch of the rotor blades, the method comprising:
- measuring a wind direction parameter by the wind direction sensor, wherein the wind direction parameter is indicative of the wind direction relative to the wind turbine;
- calibrating the measured relative wind direction as a function of a predetermined offset parameter;
- adjusting the calibrated relative wind direction as a function of a wind direction compensation parameter, wherein the wind direction compensation parameter depends on the calibrated relative wind direction;
- determining a control parameter of the wind turbine as a function of the adjusted relative wind direction;
- and
- controlling the wind turbine according to the control parameter.
A control system for a wind turbine, comprising:
- an input/out (I/O) interface configured to communicate with the wind turbine;
- a memory containing instructions;
- and
- a processor communicatively coupled to the I/O interface and the memory, and
- configured to execute the instructions to perform an operation comprising:
- receiving a wind direction parameter as measured by a wind direction sensor, wherein the wind direction parameter is indicative of the wind direction relative to the wind turbine;
- calibrating the measured relative wind direction as a function of a predetermined offset parameter;
- adjusting the calibrated relative wind direction as a function of a wind direction compensation parameter, wherein the wind direction compensation parameter depends on the calibrated relative wind direction;
- determining a control parameter of the wind turbine as a function of the adjusted wind parameter;
- and
- controlling the wind turbine according to the control parameter.
A wind turbine, comprising:
- a wind sensor,
- a yawing system, and
- a control system configured to yaw the wind turbine rotor relative to the wind by performing an operation comprising:
- receiving a wind direction parameter as measured by a wind direction sensor, wherein the wind direction parameter is indicative of the wind direction relative to the wind turbine;
- calibrating the measured relative wind direction as a function of a predetermined offset parameter;
- adjusting the calibrated relative wind direction as a function of a wind direction compensation parameter, wherein the wind direction compensation parameter depends on the calibrated relative wind direction;
- determining a control parameter of the wind turbine as a function of the adjusted wind parameter;
- and
- controlling the wind turbine according to the control parameter.
Dependencies are inferred from the claim text.