Abstract:

Static deviation is common in yaw control system of wind turbines,resulting in reduction of power generation efficiency and increase of low load.Based on the wind turbine operating data,an improved analysis and calculation method for discretized static deviation of yaw system based on data preprocessing is proposed. By analyzing the operating characteristics of the wind turbines,the operating data in the horizontally distributed interval of tip speed ratios during maximum wind power tracking are selected.And the static deviations of the yaw system are analyzed and calculated by comparing the power characteristics with different wind speed and yaw error intervals.Baesd on data measured by laser radarsonde,the effectiveness of the method can be tested,and the relationship between the static deviation of the yaw system and the impeller speed is established.More accurate analysis on static deviation of the yaw system can be made according to impeller speed.The application results in wind farms show that the proposed method can effectively and accurately analyze and calculate the static deviation of the yaw system.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">static deviation of the yaw system, wind turbine, data preprocessing, power characteristics, tip speed ratio, laser radarsonde