Comprehensive comparisons between six-arm and nine-arm modular multilevel converter

被引：3
|
作者：
Qin F. [1 ]
Gao F. [1 ]
Tang Y. [2 ]
Wang J. [2 ]
Xu T. [1 ]
机构：
[1] Key Laboratory of Power System Intelligent Dispatch and Control, Ministry of Education, Jinan
[2] The School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
来源：
CPSS Transactions on Power Electronics and Applications | 2020年 / 5卷 / 02期
关键词：
Capacitor voltage ripple; Current stress; Nine-arm MMC; Power losses; Six-arm MMC; Submodules number;
D O I：
10.24295/CPSSTPEA.2020.00012
中图分类号：
学科分类号：
摘要：
Nine-arm modular multilevel converter (9A-MMC) is a compact modular multilevel converter (MMC) with two sets of three-phase output terminals, and it can be regarded as the integration of two conventional six-arm modular multilevel converters (6A-MMC) with double function middle arms. Compared with two 6A-MMCs, the required submodules (SMs) in 9A-MMC can be reduced, however, there will be some performance tradeoffs, and the performance tradeoffs of 9A-MMC have not yet been investigated in detail. Hence, this paper gives the comprehensive comparisons between 6A-MMC and 9A-MMC, including the required SMs number, the current stress of the semiconductor device, the maximum capacitor voltage ripple, and the power losses of the whole system. This paper can be a guide to make the best use of the advantages and avoid the disadvantages of 9A-MMC. Finally, the simulation results verify the mathematical analysis of the comparisons. © 2021 All rights reserved.
引用
收藏
页码：135 / 146
页数：11
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