Yaw wind calibration method and device of wind turbine generator system

Abstract

The invention discloses a yaw wind calibration method and device of a wind turbine generator system. The method comprises the steps of division of wind speed sections, calculation of the average powerin the wind speed sections under different wind direction offsets, initial optimization of the sections, setting of the convergence precision, selection of initial inner division point, judgment of the convergence direction and calculation of wind direction offset values. Aiming at inaccurate yaw wind problem caused by the yaw zero deviation and the wake stream deflection, the online or offline calculation can be performed according to set steps, so that the calculating efficiency is high; wind director measured values are compensated and corrected by calculated yaw offset values to send to ayaw controller for yaw wind calibration; and the method is safe, stable, high in calculating speed and precise in result, facilitates the wind turbine generator system to improve the energy collection, and improves the power generation efficiency.

Description

Technical field [0001] The present invention relates to the field of wind power generator control, in particular to a method and device for yaw and wind calibration of a wind power generator. Background technique [0002] There is a huge amount of wind energy in the world, and it is a green energy. The utilization of wind energy has been paid more and more attention by countries all over the world, so the wind power technology has developed rapidly all over the world. In recent years, as relevant experts and scholars have conducted in-depth research on wind power generation technology, wind power generation control has become more precise and precise. Whether wind energy can be used efficiently depends largely on the accuracy of the yaw to the wind. The yaw-to-wind is realized by the yaw system, which is generally composed of a yaw drive device, a yaw transmission device, a yaw brake, a yaw counter, an anemometer, a yaw bearing, and a cable protection device. The working proces...

AI Technical Summary

Problems solved by technology

However, it is necessary to consider whether there is a deviation in the yaw zero position and the influence of the wake deflection on the wind direction measurement. If there is a deviation in the yaw zero position, coupled with the influence of the wake deflection, there will be errors in the measured value of the anemometer, which will lead to yaw Reduced wind accuracy, resulting in loss of power generation

However, it is difficult to judge the deviation direction and angle of the wind direction deviation in the field. If it is manually adjusted, it will consume a lot of manpower and material resources, and it is difficult to find a suitable deviation angle. Therefore, it is necessary to automatically adjust the possible yaw zero position of the unit. The strategy of compensating and correcting the deviation and wake deflection angle reduces the excessive dependence of the traditional yaw strategy on the anemometer, so as to improve the accuracy of yaw and wind and improve the efficiency of wind energy capture

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