基于移相空间矢量调制的多通道三相变流器  

Multi-channel three-phase converter based on phase-shift space vector modulation

作　　者：陈万[1] 谢少军[1] 朱哲[1] 李磊[1] 

机构地区：[1]南京航空航天大学自动化学院,江苏南京210016

出　　处：《电力自动化设备》2015年第5期9-14,共6页Electric Power Automation Equipment

基　　金：江苏省科技支持计划项目(BE2010188)~~

摘　　要：在传统阶梯波合成变流器基础上,提出一种移相结合错时采样空间矢量调制(STS-SVM)的多通道三相并网变流器,该变流器由多组结构完全一致的阶梯波合成变流器组成,其中一组变流器采用STS-SVM方式得到控制信号,其他各组变流器的控制信号可以依次延迟一定的角度得出。交流侧串联叠加各组阶梯波合成变流器输出,大幅抑制了其中的高次谐波,网侧接入很小滤波器即可得到高质量进网电流。研究了该多通道变流器的数学模型,给出了直接电流控制方案。研制了一台16通道中频脉宽调制(PWM)变流器,实验结果表明该多通道PWM变流器具有开关频率低、网侧电流质量高、系统响应速度快和功率因数可控的优点。Based on the traditional staircase converter,a multi-channel three-phase grid-connected converter with phase-shift control plus STS-SVM （Sample-Time-Staggered Space Vector Modulation） is presented, which is composed of multiple staircase converters with same structure. The switching signal of one staircase converter is obtained by the STS-SVM while the switching signal for other staircase converters are obtained in turn by phase shifting of a certain angle. High order harmonics of its output voltage is greatly suppressed by superposing the outputs of all staircase converters at AC side,thus the grid-connecting current of high quality can be obtained by connecting a very small filter at grid side. The mathematical model of the presented multi-channel converter is studied and its direct current control strategy is given. A 16-channel medium-frequency PWM（Pulse Width Modulation） converter is developed and its experimental results show that,it has the advantages of low switching frequency,high quality grid-connecting current,quick response speed and controllable power factor.

关 键 词：阶梯波合成变流器 三相并网变流器 错时采样空间矢量调制 移相控制 电流控制 变流器 

分 类 号：TM46[电气工程—电器]