三相PWM整流器H∞鲁棒控制器设计

摘要

三相PWM整流器普遍采用双闭环PI控制策略.在此针对电流环特点,设计了一种H∞鲁棒控制器.基于d,q轴旋转坐标系下PWM整流器的数学模型,选择适当的状态参数,建立了满足H∞鲁棒控制标准型的增广状态方程.依据H∞鲁棒控制的原理,定义评价信号,通过求解Riccati不等式,得到H∞鲁棒控制器.仿真和实验证明了所提方法的可行性和有效性.%Double closed PI PWM rectifier is widely used in traditional design. An H∞ robust control method is presented for the inner current loop of three-phase PWM rectifier. Based on the mathematical model in synchronous of the PWM rectifier, state equations are established with suitable state variables for the standard setup of the H∞ robust control problem. After selecting suitable weighted coefficient,the Riccati inequality is solved to derive the H∞ robust controller. Simulation and experimental results demonstrate that the designed H∞ robust control system is suitable and effort for the PWM rectifier.