三电平SVPWM与CBPWM算法的内在联系研究

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摘要由于三电平中点钳位逆变器能有效提高逆变器系统容量和耐压水平,减少输出电压的谐波,所以其在中高压大容量电能变换领域中得到了广泛应用。为了揭示三电平中点钳位逆变器空间矢量脉宽调制（SVPWM）和载波脉宽调制（CBPWM）算法的内在联系,本文首先分析了三电平SVPWM算法的原理,并根据调制度的大小将整个线性调制范围分为3段,然后根据脉宽调制的规则采样法,分别推导出了3个调制段内与SVPWM等效的CBPWM调制函数形式。理论研究表明：三电平SVPWM算法是一种特殊形式的CBPWM算法。最后仿真和实验结果证明了理论分析的正确性和有效性。

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	方辉
	宋文胜
	冯晓云
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	丁荣军

关键词 ：空间矢量脉宽调制, 载波脉宽调制, 三电平, 调制函数

Abstract：Due to the high system capacity, high voltage withstand level and low harmonics of output voltages, the neutral point clamped (NPC) three-level inverter is widely used in the field of medium and high voltage and high capacity power conversion equipment. In order to reveal the relationship between space vector pulse width modulation (SVPWM) and carrier-based pulse width modulation (CBPWM), the principle of SVPWM is analyzed firstly. There are three modes in the linear modulation region depending on the modulation index. Secondly, the modulating functions of CBPWM equivalent to SVPWM in the three modulation modes are derived, which are on the basis of CBPWM regular sampling rule. Theoretical analysis shows that three-level SVPWM is a special type of CBPWM algorithm. The validity and effectiveness of the theoretical analysis is verified by simulation and experimental results.

Key words： Space vector pulse width modulation (SVPWM) carrier-based pulse width modulation (CBPWM) three-level modulating functions

收稿日期: 2012-10-10 出版日期: 2014-11-05

PACS:

TM464

基金资助:国家自然科学基金—高铁联合基金（U11344205）,国家自然科学基金（51207131、51277153）和“十一五”国家科技支撑计划（2009BAG12A05）资助项目

作者简介: 方辉女,1988年生,博士研究生,研究方向为电力牵引交流传动及其控制技术。宋文胜男,1985年生,博士,讲师,研究方向为电力牵引交流传动及其控制技术。

引用本文:

方辉, 宋文胜, 冯晓云, 葛兴来, 丁荣军. 三电平SVPWM与CBPWM算法的内在联系研究[J]. 电工技术学报, 2014, 29(10): 19-26. Fang Hui, Song Wensheng, Feng Xiaoyun, Ge Xinglai, Ding Rongjun. Relationship between Three-Level SVPWM and CBPWM. Transactions of China Electrotechnical Society, 2014, 29(10): 19-26.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2014/V29/I10/19

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