三相电压型PWM整流器滑模控制研究

The Sliding Mode Control for Three-phase Voltage Source PWM Rectifier

三相电压型脉宽调制(PWM)整流器是一个强非线性系统,采用常规线性控制难以达到理想的控制效果,动态性能差且参数调节复杂。在此提出了一种基于同步旋转坐标系下电压和电流双闭环控制算法,其中电压外环采用滑模控制算法,电流内环采用传统比例积分(PI)控制策略。数值仿真和实验表明该方法能明显提高系统的动、静态性能,同时也表明该方法的正确性和优越性。

Three-phase voltage pulse width modulation (PWM) rectifier is a strongly nonlinear system.lt is difficult to achieve the ideal control effect using the conventional liner control method for its poor dynamic performance and complicated parameters adjustment. A double closed-loop control algorithm of voltage and current is proposed based on the synchronous rotating reference frame, in which a sliding-mode control algorithm for the outer voltage loop and conventional proportional integral (PI) control method for the inner current loop.The numerical simulation and experi丒 mental validation results show that the method can obviously improve the static and dynamic performance of system. Experimental results show that the method is correct and superior.