| 引用本文: | 陈 万,谢少军,朱 哲,李 磊.基于移相空间矢量调制的多通道三相变流器[J].电力自动化设备,2015,35(5): |
| CHEN Wan,XIE Shaojun,ZHU Zhe,LI Lei.Multi-channel three-phase converter based on phase-shift space vector modulation[J].Electric Power Automation Equipment,2015,35(5): |
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| 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。 |
| 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 |
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| 基金项目:江苏省科技支持计划项目（BE2010188） |
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| Multi-channel three-phase converter based on phase-shift space vector modulation |
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CHEN Wan, XIE Shaojun, ZHU Zhe, LI Lei
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College of Automation Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China
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| Abstract: |
| 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. |
| Key words: staircase converter three-phase grid-connected converter sample-time-staggered space vector modulation phase-shift control electric current control electric converters |
