基于无源性与滑模变结构控制相结合的VIENNA整流器控制策略

VIENNA rectifier control strategy based on passivity control and sliding mode variable structure control

针对VIENNA整流器的非线性特点,提出一种无源性控制与滑模变结构控制相结合的混合控制策略。在建立同步旋转坐标系下VIENNA整流器非线性数学模型的基础上,推导了VIENNA整流器的Euler-Lagrange数学模型,分析了VIENNA整流器的无源性。利用无源性理论及滑模变结构控制理论设计了VIENNA整流器的控制器,即电压外环采用滑模变结构控制、电流内环采用无源性控制的双闭环控制算法。在MATLAB7.1/Simulink环境中建立了仿真模型,并搭建了800 W的实验样机。仿真与实验结果表明,所提出的混合控制策略达到了控制的目的。利用无源性控制与滑模变结构控制相结合的整流器具有鲁棒性强、动态特性好、抗干扰能力强等优点。

A strategy combining passive control and sliding mode variable structure control is proposed for the nonlinear VIENNA rectifier. The nonlinear mathematical model of VIENNA rectifier is built in synchronous rotating coordinate system,based on which,its Euler-Lagrange mathematical model is derived and its passivity is analyzed. A VIENNA rectifier controller is designed,including the outer voltage loop based on sliding mode variable structure control and the inner current loop based on passive control.The simulation model is established with MATLAB7.1 / Simulink and an 800 W experimental prototype is built. The simulative and experimental results show that,the VIENNA rectifier with the proposed control strategy has excellent robustness,good dynamic performances,strong anti-interference ability,etc.,and the desired control targets are achieved.