基于谐波注入法的级联型逆变器谐波消除研究

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摘要为了减小H桥级联多电平逆变器输出电压波形中的低次谐波含量, 对通过控制各H桥开关角实现级联逆变器谐波消除的方法进行了深入研究。针对解方程组消除特定谐波中高次多变量方程组难于求解的问题, 提出一种基于谐波注入法消除谐波的方法。其以等面积法和谐波注入为基础, 利用该方法, 不论多少阶梯电压波形, 仅需解几个简单的方程和进行数次迭代就可以有效减小各次谐波。最后在五H桥级联型逆变器上进行仿真与实验研究, 结果验证了本文所提方法的正确性。

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	朱思国
	陆佳政
	欧阳红林
	李波

关键词 ：级联逆变器, 高次多变量方程组, 谐波注入法, 等面积法

Abstract：In order to reduce the low order harmonic content of output voltage waveform for H bridge cascaded multilevel inverter, a harmonic elimination method is studied through controlling the switch angles of each H bridge.There is considerable difficulty in solving the multi-variable high-order equation system when the method of solving equations is applied to eliminate specified harmonics, a novel method of eliminating specified harmonics based on harmonic injection is presented in this paper.This method is based on equal area criteria and harmonic injection. With the proposed method, regardless of how many voltage levels are involved, only several simple equations and several iterations are needed. Finally, in five H bridge cascaded inverter, simulation and experimental results show the correctness of the proposed method.

Key words： Cascaded inverter multi-variable high-order equation system harmonic injection equal area criteria

收稿日期: 2010-09-19 出版日期: 2014-03-20

PACS:

TM921

作者简介: 朱思国男, 1979年生, 博士研究生, 研究方向为电力电子技术与输电线路防灾技术。陆佳政男, 1969年生, 博士, 高级工程师, 研究方向为高电压技术和输电线路防灾技术。

引用本文:

朱思国, 陆佳政, 欧阳红林, 李波. 基于谐波注入法的级联型逆变器谐波消除研究[J]. 电工技术学报, 2012, 27(8): 194-202. Zhu Siguo, Lu Jiazheng, Ouyang Honglin, Li Bo. Research of Harmonic Elimination Based on Harmonic Injection for Cascaded Inverter. Transactions of China Electrotechnical Society, 2012, 27(8): 194-202.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2012/V27/I8/194

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