Control method for a wind turbine
AssigneeVestas Wind Systems A/S
InventorJohnny Nielsen
Life of this patent
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Abstract
A wind turbine includes a wind direction sensor, a yawing system, and a control system for yawing the wind turbine rotor relative to the wind. The control system measures a wind direction parameter by the wind direction sensor Over time a group of data sets is obtained and a wind direction offset is determined from the group of data sets which is used to adjust the wind direction parameter. The adjusted wind direction parameter is then used in the controlling of the wind turbine.
Claims18
A method of controlling a wind turbine, the wind turbine comprising a wind direction sensor for measuring a wind direction parameter indicative of the wind direction relative to the wind turbine, a yawing system, and a control system for yawing the wind turbine rotor relative to the wind, the method comprising:
- measuring a first wind direction parameter by the wind direction sensor;
- performing a yaw event comprising the steps of determining a control parameter of the wind turbine as a function of the wind direction parameter, wherein the control parameter comprises a yawing parameter for the wind turbine, and controlling the wind turbine according to the control parameter, wherein the controlling comprises yawing the wind turbine according to the yawing parameter;
- measuring a wind direction parameter by the wind direction sensor after said yawing event;
- determining a data set comprising the first wind direction parameter, a wind direction sensor angle determined as a difference in the measured wind direction parameter before and after the yawing event, and a yaw angle indicative of the yawing performed during the yawing event;
- obtaining over time a group of data sets;
- determining a wind direction offset from the group of data sets;
- adjusting the wind direction parameter as a function of the wind direction offset, and
- applying the adjusted wind direction parameter in the controlling of the wind turbine.
A control system for a wind turbine configured to perform the steps of:
- receiving a first 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;
- performing a yaw event comprising the steps of determining a control parameter of the wind turbine as a function of the wind direction parameter, wherein the control parameter comprises a yawing parameter for the wind turbine, and controlling the wind turbine according to the control parameter, wherein the controlling comprises yawing the wind turbine according to the yawing parameter;
- receiving a wind direction parameter as measured by the wind direction sensor after said yawing event;
- determining a data set comprising the first wind direction parameter, a wind direction sensor angle determined as a difference in the measured wind direction parameter before and after the yawing event, and a yaw angle indicative of the yawing performed during the yawing event;
- obtaining over time a group of data sets;
- determining a wind direction offset from the group of data sets;
- adjusting the wind direction parameter as a function of the wind direction offset, and
- applying the adjusted wind direction parameter in the controlling of the wind turbine.
(canceled)
A wind turbine, comprising:
- a tower;
- a nacelle disposed on the tower;
- a rotor extending from the nacelle;
- a plurality of blades connected to the rotor;
- a wind sensor configured to detect a direction of a wind;
- a yawing system;
- and
- a control system configured to perform an operation, comprising:
- measuring a first wind direction parameter by the wind direction sensor;
- performing a yaw event, comprising:
- determining a control parameter of the wind turbine as a function of the wind direction parameter, wherein the control parameter comprises a yawing parameter for the wind turbine, and
- controlling, by the yawing system, the wind turbine according to the control parameter, wherein the controlling comprises yawing the wind turbine according to the yawing parameter;
- measuring a wind direction parameter by the wind direction sensor after said yawing event;
- determining a data set comprising the first wind direction parameter, a wind direction sensor angle determined as a difference in the measured wind direction parameter before and after the yawing event, and a yaw angle indicative of the yawing performed during the yawing event;
- obtaining over time a group of data sets;
- determining a wind direction offset from the group of data sets;
- adjusting the wind direction parameter as a function of the wind direction offset, and
- applying the adjusted wind direction parameter in the controlling of the wind turbine.
Dependencies are inferred from the claim text.