TAO Xue-jun, LU Xiao-guang

(XJ-Windpower Technology Company, Xuchang 461000, china)

Abstract: In order to reduce the tower vibration of MW wind turbine in running, by the control methods, the dynamic characteristics of the tower and the excitation source dynamic characteristics of the tower were analyzed. As an example, the tower vibration assessment for a 2MW wind turbine was carried out. Then, the control method was made to increase the aerodynamic damp of the tower oscillation according to the result of the assessment,and the architecture of the active control was designed to increase the damping, which works with the manipulate that power is reduced when the tower vibrate violently. Through them, the control for tower vibration reduction was achieved. The simulation was tested and equivalent fatigue load was evaluated on the XJ WRTS-800 and PRDS-600 simulation platform. In order to further prove that the method, the field tests in wind field experiment were carried out, the experimental statistics were analyzed. The experimental results show that, the tower equivalent fatigue load is reduced significantly,and the effect of active control vibration reduction is obvious.

Key words: wind turbine tower; damping filter; vibration control; simulation platform; fatigue loads