Control method for a wind turbine
A wind turbine and control method technology, applied in the control of wind turbines, wind turbines, engine control and other directions, can solve the problems of wear, wind turbine yaw back and forth, yaw component height increase, etc., to reduce wear, improve performance, good protective effect
Active Publication Date: 2019-02-05
VESTAS WIND SYST AS
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Problems solved by technology
In cases where the wind sensor measures too high a value relative to the wind direction, this error can cause the wind turbine to yaw back and forth on either side of the actual wind direction
In addition to a non-optimal control of the wind turbine, this yaw causes, in addition to a non-optimal positioning of the rotor in the wind, highly increased wear on the yaw components
Method used
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Embodiment Construction
[0064] figure 1 The change in wind direction as the free wind flow 100 passes the wind turbine rotor 101 is illustrated. If the rotor 101 is turned directly into the wind, as shown by the solid black line 103, the wind direction sensor 104 located on the nacelle 105 behind the rotor 101 when calibrated will measure a wind direction of 0 degrees. However, if the wind is not directly against the wind, the wind flow 100 is affected by the rotor 101 and is affected differently depending on the direction of the incident wind. Therefore, the wind sensor 104 may not be able to accurately detect the wind direction. This figure illustrates how an incident wind 110 of approximately 45 degrees may be measured as only 30 degrees (111) even though the wind sensor has been calibrated.
[0065] figure 2A flow chart illustrating the method steps performed in the control system 200 of a wind turbine according to the invention is shown. The control method comprises measuring 201 a directio...
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The invention relates to a method of controlling a wind turbine comprising a wind direction sensor, a number of pitch-adjustable rotor blades, a yawing system, and a control system for yawing the windturbine rotor relative to the wind and for changing the pitch of the rotor blades. The method comprises 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. Then firstly the measured relative wind direction is calibrated as a function of a predetermined offset parameter, and secondly the calibrated relative wind direction is adjusted as a function of a wind direction compensation parameter, wherein the wind direction compensation parameter depends on the calibrated relative wind direction. 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 secondwind direction sensor. The invention further relates to a control system for a wind turbine for performing a control method as mentioned above.
Description
technical field [0001] The present invention relates to a method of controlling a wind turbine comprising a wind direction sensor, a yaw system and a control system for yawing the rotor of the wind turbine relative to the wind, with the aim of optimally operating in different and changing wind directions control wind turbines. The invention also relates to a control system for carrying out the control method and a wind turbine comprising such a control system. Background technique [0002] Most modern wind turbines are continuously controlled and adjusted with the aim of ensuring maximum power extraction from the wind under prevailing wind and weather conditions, while ensuring that the loads on the different components of the wind turbine are kept within acceptable limits at all times Inside. [0003] In order to optimize the electricity production of the turbine and reduce the load, it is important to know the correct relative wind direction of the free flowing wind. Mo...
Claims
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IPC IPC(8): F03D7/02
CPCF05B2270/32F05B2270/321F05B2270/328F05B2270/329F03D7/0204F05B2270/8042Y02E10/72F05B2270/802G05B2219/2619
Inventor J·尼尔森B·伦布克梅尔高
Owner VESTAS WIND SYST AS