Analysis of the Phase-Shifted Carrier Modulation for Modular Multilevel Converters

被引：346

作者：

Li, Binbin ^{[1
]}

Yang, Rongfeng ^{[1
]}

Xu, Dandan ^{[1
]}

Wang, Gaolin ^{[1
]}

Wang, Wei ^{[1
]}

Xu, Dianguo ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Elect Engn & Automat, Harbin 150001, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2015年 / 30卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Fourier series; modular multilevel converter (MMC); phase-shifted carrier (PSC); pulsewidth modulation (PWM); PULSE-WIDTH MODULATION; DC-LINK; VOLTAGE; FREQUENCY; IMPACT; PWM;

D O I：

10.1109/TPEL.2014.2299802

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

080906 [电磁信息功能材料与结构]; 082806 [农业信息与电气工程];

摘要：

The modular multilevel converter (MMC) is an emerging topology for high-power applications and is considered as the development trend of the high-voltage power converters. In this paper, general implementation of the phase-shifted carrier (PSC) modulation with a capacitor voltage balancing method for MMC is first introduced. Then, the mathematical analysis of PSC modulation for MMC is performed to identify the PWM harmonic characteristics of the output voltage and the circulating current. Moreover, influence of the carrier displacement angle between the upper and lower arms on these harmonics is also studied. Using this analysis, the optimum displacement angles are specified for the output voltage harmonics minimization and the circulating current harmonics cancellation, respectively. The harmonic features of the line-to-line voltage and the dc-link current are also investigated. Moreover, an extension of the PSC modulation for MMC with full-bridge submodules is also proposed which can increase the equivalent switching frequency of the output voltage and circulating current by two times compared with the conventional MMC. Finally, the findings are verified experimentally on a prototype of MMC.

引用

页码：297 / 310

页数：14

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