风力发电机自适应鲁棒保性能控制器设计

摘要

Considering the high demand on the characteristics of energy utilization and dynamic stability for the variable speed variable pitch wind generator,a linear parameter varying (LPV) system model for the wind and energy conversion system was established,a sufficient condition of the adaptive robust guaranteed cost controller was presented and a new adaptive guaranteed cost controller (AGCC) was designed.The uncertain parameters of the system were estimated by using the adaptive method,then the estimated uncertain parameters and robust guaranteed cost control were used to design the state feedback gain by solving a set of linear matrix inequality (LMI) constraints,and making the controller meet the requirement of the quadratic performance evaluation.The simulation results show that,regardless under low or high wind speed,the controller has good robust anti-interference ability.%针对变速变桨距风力发电机系统对于风能利用率、动态稳定性要求高的特点,建立了风能转换系统的线性参数变化(LPV)模型,给出了设计一个具有自适应机制的鲁棒保性能控制器的充分条件,进而设计出一种新的自适应鲁棒保性能控制器.首先,运用自适应方法估计出系统的不确定参数,然后利用参数估计和鲁棒保性能控制方法设计系统的状态反馈控制器,其反馈增益阵是通过求解一组线性矩阵不等式(LMI)的约束而得到,并且满足某二次型性能指标.仿真表明,无论在低风速下还是在高风速下,控制器不仅使系统具有良好的动态特性和鲁棒性,而且使系统具有抑制外界干扰能力.