Theoretical analysis of the harmonic characteristics of modular multilevel converters

被引：15

作者：

Xiao HuangQing ^{[1
]}

Xu Zheng ^{[1
]}

Xue YingLin ^{[1
]}

Tang Geng ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Elect Engn, Hangzhou 310027, Zhejiang, Peoples R China

来源：

SCIENCE CHINA-TECHNOLOGICAL SCIENCES | 2013年 / 56卷 / 11期

基金：

国家高技术研究发展计划(863计划);

关键词：

modular multilevel converter; harmonic characteristics; average switching function; Fourier series analysis; PSCAD/EMTDC;

D O I：

10.1007/s11431-013-5331-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To understand the operation principle of the modular multilevel converter (MMC) deeply, it is necessary to study the harmonic characteristics of the MMC theoretically. Besides, the analytical harmonic formulas of the MMC are useful in designing the main circuit, reducing the losses and improving the waveform quality. Based on the average switching function and the Fourier series harmonic analysis, this paper deduces the analytical expressions for such electrical quantities as the arm voltage, the arm current, the capacitor voltage, the capacitor current and the circulating current of the MMC. Finally, a digital model of a 21-level MMC-HVDC system is realized in PSCAD/EMTDC. The results of the analytical expressions coincide with the simulation results, which verify the effectiveness and feasibility of the proposed analytical expressions.

引用

页码：2762 / 2770

页数：9

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