基于PR控制的VIENNA整流器高次谐波抑制

三相VIENNA整流器采用传统双闭环线性比例积分(Proportional Integral,PI)控制难以实现对输入交流量的无静差跟踪调节,同时dq轴解耦需要多次坐标变换,不利于数字实现且会给网侧电流带来高次谐波。基于此,本文将多个比例谐振(Proportional Resonant,PR)控制器并联模块引入三相VIENNA整流器,根据其数学模型在αβ坐标系下的特性设计了电流环,改善了网侧电流质量,降低了高次谐波含量,消除了电压电流相位差,实现了无静差跟踪。在Matlab/Simulink中搭建了仿真模型,仿真结果表明该控制策略可有效降低网侧电流谐波含量

The High-order Harmonics Suppression of Vienna Rectifier Based on PR Control

When three-phase VIENNA rectifier adopts the traditional double-closed-loop linear proportional integral(PI)control, it is difficult to achieve the non-static tracking adjustment of the input AC current. Meanwhile, the dq-axis decoupling requires multiple coordinate transformations, which is not conducive to digital realization and brings high harmonics to the grid side current.The three-phase VIENNA rectifier with several parallel modules of the proportional resonant(PR)control was studied. The current loop was designed according to the mathematical model of VIENNA rectifier in the ɑβ coordinate system, which improves the grid-side current quality and eliminated the voltage-current phase difference. The Matlab/Simulink model were built, and the results show that the control strategy can effectively reduce the current harmonic content of the grid side