Alexandria, Aug. 3 -- North China Electric Power University and Guodian New Energy Technology Research Institute have secured a patent on yaw calibration method and system for wind turbine. Lin Zhongwei, Qu Chenzhi, Wang Chuanxi, Chen Zhenyu, Han Xiangyu, Xie Zhen, Cui Qingru, Li Gengda and Li Xiongwei developed the invention. The patent application number is 17/095,038. The International Patent Classification codes are F03D 7/02 (20060101) and F03D 7/04 (20060101). Cooperative Patent Classification codes are F03D 7/0204 (20130101), F03D 7/048 (20130101), F05B 2270/329 (20130101), F05B 2270/70 (20130101), F05B 2270/321 (20130101), F05B 2270/32 (20130101) and F05B 2270/328 (20130101).
The abstract released by U.S. Patent and Trademark Office states, "The disclosure proposes a yaw calibration method and system for a wind turbine. The calibration method includes: establishing a cylindrical coordinate graph of wind resource distribution based on historical wind farm operation data, to determine a wind direction interval of main inflow wind conditions of a wind farm; calculating an effective value of active power of each wind speed sub-interval, and obtaining a fitted power curve of each refined interval through curve fitting; and setting an angle between a central axis of a refined interval for a fitted power curve corresponding to a calibration curve in each wind speed range and a central axis of the to-be-calibrated wind direction interval as a yaw error calibration value in the wind speed range, to establish a wind speed-yaw error calibration value lookup table; and determining a yaw error calibration value under a current wind direction and a current wind."