基于变增益的风力机变桨距控制研究

摘要

For large variable speed variable pitch wind turbine,through researching on the control stragegy about how to reduce generator speed fluctuation above rated wind speed,we found that the pitch angle of wind turbine changes nonlinearly relative to wind speed.This paper proposes that we could change the controller gain reasonably to make controller parameter comply with pitch angle,which could stabilize the operation of the wind turbine.Simulation study based on Matlab shows that this control strategy could inhibit the fluctuation of generator speed.%针对大型变速变桨风力发电机组在额定风速以上如何降低发电机转速波动的控制技术进行研究发现,在高风速下,风力机的桨距角变化对于风速而言是非线性的.本文提出通过合理改变控制器的增益值使得控制器参数的变化能够跟随桨距角,从而稳定风力机的运行.基于Matlab进行的仿真研究表明,相对于传统的PI控制策略,该控制策略能够更有效的抑制转速波动.