基于单周期控制的三相四线制VIENNA整流器

Research on Single-cycle Control of Three-phase Four-wire VIENNA Rectifier

本文采用单周期控制技术对三相四线制VIENNA整流器进行控制,通过物理解耦的基础上,建立了平均值模型和小信号模型,推导了实现单位功率因数需要的控制方程,并对三相四线制VIENNA整流器进行了电压环设计,实现了高功率因数、直流输出电压稳定的目的。最后利用Matlab仿真进行验证,仿真结果表明该整流器可以实现单位功率因数校正,直流侧输出电压稳定,在三相交流输入不对称或缺相状态下,整流器仍能正常工作,提高了VIENNA整流的适应环境的能力。

This paper presents a single cycle control technology to control the three-phase four-wire VIENNA rectifier. And the average model and small-signal model are established on the basis of physical decoupling to derive the control functions of unity power factor. Furthermore, a voltage loop is designed for the three-phase four-wire VIENNA rectifier to achieve a high power factor and the stability of DC output voltage. Finally, the proposed method is verified by the Matlab/Simulink, and thesimulation results show that the rectifier can achieve the correction of unity power factor and the stability of DC-side output voltage.In addition, the ability to adapt to the environment of VIENNA rectification is improved, namely, the rectifier can still work when the three-phase AC input is not symmetrical or in lack of phase