风力发电机组独立变桨鲁棒自适应桨距角跟踪控制

在全面考虑风力发电机组桨叶所受各种载荷的情况下,建立了含有时变不确定项、未知载荷干扰的桨叶动力学数学模型,该模型精确描述了桨叶系统的非线性动力学行为。模型存在很多不确定时变参数和未知干扰项,针对这一复杂多变的桨叶模型,采用鲁棒自适应控制方法,成功设计了独立桨距角跟踪控制器。利用李雅普诺夫(Lyapunov)稳定性理论,证明了系统的稳定性。采用Matlab/Simulink仿真软件,建立了风力机组桨叶动力学仿真模型。仿真结果表明,所设计的桨叶桨距角控制器,在系统参数和所受干扰完全未知、不确定且时变的情况下,能够快速跟踪期望的桨距角,表现出良好的鲁棒性。

Robust adaptive blade pitch angle tracking control for wind turbines

In full consideration of wind turbine blades suffered various loads, blade dynamics mathematical model containing time-varying uncertain terms and unknown load interference are established, the model accurately describes the nonlinear dynamic behavior of blade system. Blade system model is complex and there are many time-varying uncertainties parameter, for this complex and changeable blade system model, by use of robust adaptive control methods, an independent pitch angle tracking controller is designed. Lyapunov stability theory proves the stability of the system. Using Matlab/Simulink simulation software, wind turbines blade dynamics simulation model are built. Simulation results show that the designed blade pitch angle controller, when the system parameters and suffered interference are completely unknown uncertain and time-varying, are able to fast track the expected pitch angle, and controller shows good robustness.