Power losses minimization for modular multilevel converters with second-order and fourth-order harmonic circulating current injection

被引：0
|
作者：
Zhao, Jifeng [1 ]
Deng, Fujin [1 ,2 ]
Liu, Chengkai [1 ]
Yu, Qiang [1 ]
机构：
[1] Southeast Univ, Sch Elect Engn, Nanjing, Peoples R China
[2] Southeast Univ, Jiangsu Key Lab Smart Grid Technol & Equipment, Nanjing, Peoples R China
来源：
INTERNATIONAL TRANSACTIONS ON ELECTRICAL ENERGY SYSTEMS | 2021年 / 31卷 / 08期
基金：
中国国家自然科学基金;
关键词：
circulating current injection; modular multilevel converters; power loss; reliability; VOLTAGE; MMC;
D O I：
10.1002/2050-7038.12962
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：
Modular multilevel converters (MMCs) are regarded as promising topologies in medium/high-voltage and high-power applications. The reduction of power losses is an important issue for MMCs. This paper proposes a power loss minimization control (PLMC) by injecting optimal second- and fourth-order harmonic circulating current into the arm current of MMCs. The proposed control can further reduce the power loss in comparison with the conventional control by only injecting the second-order harmonic circulating current. In addition, the proposed control not only reduces the peak value of the arm current, but also improves the reliability of MMCs. Simulation with the PSCAD/EMTDC and experiment with 1-kW MMC prototype are also conducted and their results confirm the validity of the proposed PLMC for MMCs.
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页数：19
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