变速变桨风力发电机组塔架的侧向振动控制

针对结构阻尼很小的大型兆瓦级变速变桨(Variable Speed and Variable Pitch,VSVP)风力发电机组如何抑制塔架的侧向振动问题进行研究,提出在控制器的设计中,借助反馈增益并使用塔顶振动加速度测量值来确定附加的电机转矩设定点,并在反馈控制回路中使用椭圆带通滤波器和切比雪夫低通滤波器,进而改善塔架侧向振动阻尼。以某5 MW变速变桨风力发电机组为验证对象,基于Bladed软件平台对该控制策略进行仿真验证。结果表明:所提出的控制策略能够有效降低塔架的侧向振动位移,且对叶轮转速和电机扭矩没有太大影响。

Control of side-to-side vibration of the tower of a variable speed and variable pitch wind turbine

A study was performed on the control strategy of a large variable speed and variable pitch(VSVP) wind turbine with very small structural damping to suppress the side to side vibration of the tower.The side-to-side vibration damping of the tower can be improved by setting an additional torque setpoint based on feedback gain and vibration acceleration measurements of the tower head,and applying the elliptic band-pass filter and Chebyshev low-pass filter in the feeback control loop in the controller design.Simulation for a 5 MW wind turbine with the proposed control strategy was conducted on Bladed software platform.The results show that the proposed control strategy can effectively reduce the side to side displacement without too much influence on rotor speed and generator torque.