换序法在矩阵变换器调制策略中的应用及其优化

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摘要空间矢量调制算法作为矩阵变换器的一种常用调制算法, 在调制时由于零矢量选择及矢量排序的多样性, 使得该算法具有进一步的优化空间。研究发现, 传统的空间矢量调制法在电压型换流过程中由于中间大压差电压的存在, 使得两次换流前后的电压差值均很大, 这种模式会造成一些不必要的开关损耗。本文利用换序法改进了空间矢量调制法的调制顺序, 即按照输入电压的大小进行调制。此外, 在降低开关损耗的基础上, 结合已有的降低共模电压措施, 提出了一种综合改善空间矢量调制法的方案。仿真和实验表明提出的改进方法有效地降低了矩阵变换器的开关损耗和共模电压。

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	蔡巍
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	乔鸣忠
	林桦
	佘宏武

关键词 ：矩阵变换器, 空间矢量调制法, 换序法, 共模电压, 开关损耗

Abstract：Space vector modulation (SVM) is a kind of modulation in common use for matrix converter (MC). The complexity of SVM is increased because of the modulation multiplicity of zero vectors, and the algorithm still can be optimized. It is researched that the high differential voltage consists in the middle of the modulation subsequence which will cause high switching loss in the commutation before or after the high differential voltage. Rearrangement method of the space vector modulation patterns is proposed in this paper which is modulated according to the magnitude of the input voltages. Furthermore, a composite measure of reducing the common mode voltage of MC is also proposed based on the method of reducing switching loss. Simulation and experimental results verify the validity and feasibility of the proposed method.

Key words： Matrix converter space vector modulation rearrangement method patterns common mode voltage switching loss

收稿日期: 2010-11-04 出版日期: 2014-03-20

PACS:

TN624

基金资助:国家自然科学基金(51007094)和湖北省自然科学基金(2009CDB413)资助项目。

作者简介: 蔡巍男, 1983年生, 博士研究生, 研究方向为电力电子与电力传动、舰船电力推进技术等。何必男, 1979年生, 博士, 讲师, 研究方向为电力电子与电力传动、交-交变频器及其调速系统。

引用本文:

蔡巍, 何必, 乔鸣忠, 林桦, 佘宏武. 换序法在矩阵变换器调制策略中的应用及其优化[J]. 电工技术学报, 2012, 27(10): 135-141. Cai Wei, He Bi, Qiao Mingzhong, Lin Hua, She Hongwu. Rearrangement of Patterns and Optimization Algorithm of Space Vector Modulation for Matrix Converter. Transactions of China Electrotechnical Society, 2012, 27(10): 135-141.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2012/V27/I10/135

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