【摘要】 为了获得更好的变桨距控制效果,将扰动校正LQR(Linear Quadratic Regulator)应用到风电机组变桨距控制中,该方法通过设计扰动状态观测器估计出作为扰动量的风速,在输入量中加入一个反馈量来消除风速产生的扰动影响,然后根据LQR控制理论,计算出状态反馈矩阵。建立了风电机组的动态模型,并根据动态模型在Mat- lab7.1/simulink环境下进行了仿真。仿真结果表明,基于扰动校正的LQR控制方法超调小,变桨距执行机构疲劳度小,具有良好的动态性能。该方法易于工程实现,适用于变桨距控制系统。更多还原

【Abstract】 A disturbance accommodating Linear Quadratic Regulator(LQR)method was applied in pitch control system to achieve good performance.The disturbance can be estimated by designing state observer,and a feedback was added into the input to eliminate disturbance effect.The feed back matrix was calculated in accordance to LQR control theory.A wind turbine dynamic model was set up,and simulation of the control system was preformed based on Matlab7.1/simu- link.The simulation results showed thatod the controller ensures pitch control actuator little fatigue,and has smaller overshoot.The proposed method has better perfonnance and is easy to realize.更多还原