三电平SHEPWM与SVPWM混合控制策略及其矢量平滑切换方法的研究

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摘要本文提出了一种有源中点箝位（ANPC）三电平变换器的SHEPWM与SVPWM混合控制策略。充分利用两种控制策略的优点,在低频时采用SVPWM控制策略,获得较高的直流电压利用率,减小电流纹波;在中高频时采用SHEPWM控制策略消除特定的低次谐波。同时本文在研究了SHEPWM与SVPWM之间的联系以及对三电平变换器的影响的基础上,提出了一种可以实现在三电平SHEPWM与SVPWM两种控制方法之间,任意时刻平滑切换的方法。最后通过仿真与实验研究,验证了算法的正确性和有效性。

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	张志刚
	黄守道
	胡存刚
	张文娟

关键词 ：三电平, SHEPWM, SVPWM, 平滑切换

Abstract：Three-Level converter can solve the problem of voltage stress, and improve the output waveform quality. This paper proposed a novel hybrid method of SHEPWM and SVPWM applied to three-level ANPC converter, combining the advantage of SVPWM(worked under low frequency) and SHEPWM(worked under high frequency). This method avoid the too much low frequency and large required memory of low frequency SHEPWM, and the poor harmonic characteristic of high frequency SVPWM, which provide a good waveform in the whole working frequency range. Under the research of the essence relation between SVPWM and SHEPWM and the influence this two method bring to three-level ANPC converter, the novel hybrid method proposed in this paper realize the smooth- switching between SHEPWM and SVPWM at any time, which puzzles the normal hybrid method.

Key words： Three-level selective harmonic elimination PWM (SHEPWM) space vector PWM (SVPWM) smooth-switching

收稿日期: 2014-07-10 出版日期: 2015-09-08

PACS:

TM46

基金资助:国家自然科学基金资助项目（51307002）

作者简介: 张志刚男,1971年生,湖南长沙人,博士研究生,副教授,研究方向：电力电子与电力传动。黄守道男,1962年生,湖南郴州人,博士生导师,教授,研究方向：电力电子与电力传动及新能源发电。

引用本文:

张志刚,黄守道,胡存刚,张文娟. 三电平SHEPWM与SVPWM混合控制策略及其矢量平滑切换方法的研究[J]. 电工技术学报, 2015, 30(14): 342-349. Zhang Zhigang,Huang Shoudao,Hu Cungang,Zhang Wenjuan. Hybrid Method of Three-Level SHEPWM and SVPWM and its Vector Smooth-Switching. Transactions of China Electrotechnical Society, 2015, 30(14): 342-349.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2015/V30/I14/342

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