Vibration reduction strategy for wind turbine based on individual pitch control and torque damping control

摘要

This paper presents the vibration reduction strategy of large-size pitch-controlled variable-speed wind turbine based on pitch control and torque control. First, the torque control below the rated operating arearnand the pitch control above rated operating area are presented, and the control method to reduce the couplingrnbetween torque control and pitch control is discussed. Then the vibration mechanism and the modal analysisrnof the main components (the blade, tower and drive train) of wind turbine are studied. In terms of alleviatingrnthe blade flap-wise vibration and drive train torsion vibration, the individual pitch control strategy andrntorque damping control strategy are proposed to reduce the fluctuations of bladeflap-wise load and addrndamping to the drive train torsion vibration mode. Finally, simulations were conducted using the GH Bladedrn1.5-MW wind turbine, and the results show that the proposed vibration reduction strategy can effectivelyrnalleviate the bladeflap-wise vibration and drive train torsion vibration. Besides, because of the coupling relationship of blade/tower/drive train vibration modes, the proposed strategy can also mitigate the tower foreaft and side-side vibration. Copyright © 2016 John Wiley & Sons, Ltd.