中文摘要：

针对永磁风电机组中存在的主要非线性环节（风能捕获功率的复杂非线性、发电机的典型非线性）,设计风机转子角速度决策环节和非线性控制器,实现对风电机组的精确控制,达到全风速范围高效风能获取的目标。首先通过非线性观测器得到风速估计值,然后通过风能捕获功率的复杂非线性函数分析得到角速度参考值,最后利用角速度参考值与实际角速度值的差值驱动非线性控制器得到控制电压,以实现全程高效风能获取。针对风电机组模型,基于Lyapunov定理设计非线性控制器,能使实际角速度准确跟踪理想角速度的变化。仿真验证结果表明,非线性控制器的设计方法可行、有效。

英文摘要：

Considering the main nonlinearities in the permanent magnet wind turbine,the complex nonlinear function of the power captured from wind and the typical nonlinear structure of generators,a speed decision-making module and a nonlinear controller were designed to control the wind turbine precisely and obtain high-efficiency wing energy for the whole wind speed range.First,a nonlinear observer was used to obtain the estimate of wind speed.Then,through analysis of the complex nonlinear function of the power captured from the wind,the reference value of angular speed was obtained.Finally,based on the difference between the reference value and the actual value,the nonlinear controller was driven to obtain the control voltage.Thus,the high-efficiency wind energy for the whole wind speed range was obtained.For the model of wind turbines,the nonlinear controller was designed based on the Lyapunov theorem.This control method can make the actual angular speed value follow the reference speed value precisely.The simulation results show that the proposed method for the design of the nonlinear controller is feasible and effective.