A New Modulation for Leakage Current Reduction of Modular Multilevel Converter

被引：11
作者：
Guo, Xiaoqiang [1 ]
Du, Senyu [1 ]
Xing, He [1 ]
Wang, Lichong [2 ]
Guerrero, Josep M. [3 ]
机构：
[1] Yanshan Univ, Elect Engn Dept, Qinhuangdao 066000, Peoples R China
[2] Shenke Elect Co Ltd, Shijiazhuang 052300, Peoples R China
[3] Aalborg Univ, Dept Energy Technol, Aalborg 9220, Denmark
来源：
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS | 2023年 / 11卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Leakage currents; Modulation; Inverters; Voltage; Bridge circuits; Topology; Power generation; Common-mode voltage (CMV); leakage current; modular multilevel converters (MMCs); VOLTAGE; MINIMIZATION; ELIMINATION; INVERTER;
D O I：
10.1109/JESTPE.2022.3198731
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Leakage current is an important problem in non-isolated inverters, especially implemented in a medium- and high-voltage system. First, several analyses had carried out to reduce the high-frequency component of common-mode voltage (CMV) and the leakage current of a three-phase modular multilevel converter (MMC). Then, a new modulation method is proposed to keep CMV as the half of dc voltage and suppress the leakage current effectively. The peak value of leakage current can be suppressed under 5 mA, which complies with the VDE-0126-1-1 standard. Meanwhile, the parasitic capacitor voltage can be balanced automatically without the additional capacitor voltage control. Finally, the proposed scheme is verified in MATLAB/Simulink and tested on the hardware-in-loop platform. The effectiveness of the proposed scheme is verified by the experiment results.
引用
收藏
页码：722 / 731
页数：10
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