Novel MMC sub-module topology with DC fault clearing capability

被引：0
|
作者：
Shu H. [1 ]
Wang W. [1 ]
Jiang Y. [2 ]
Shao Z. [1 ]
Wang R. [1 ]
Liao M. [1 ]
机构：
[1] Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming
[2] Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2022年 / 42卷 / 05期
基金：
中国国家自然科学基金;
关键词：
DC fault clearing capability; Economy; MMC; Sub-module topology; Voltage balancing strategy;
D O I：
10.16081/j.epae.202202030
中图分类号：
学科分类号：
摘要：
When short circuit fault occurs on DC line of MMC-HVDC(High Voltage Direct Circuit based on Modular Multilevel Converter) system, the DC fault current cannot be blocked by traditional HBSM(Half-Bridge Sub-Module). In this regard, a FLHBSM(novel Five-Level Half-Bridge Sub-Module) topology is proposed. FLHBSM has the same control structure as HBSM with the addition of DC fault clearing capability. Compared with other sub-module topologies with DC fault clearing capability, FLHBSM reduces the number of switching devices and the area occupied by the converter station, reduces the loss and provides high control flexibility, and not only improves the economy of MMC, but also enhances its operation reliability. Meanwhile, FLHBSM can be compatible with the capacitor voltage balancing strategies suitable for HBSM, and can choose better capacitor voltage balancing strategy according to the actual needs. A simulation model of bi-terminal ±100 kV 21-level MMC-HVDC system based on FLHBSM is built on MATLAB/Simulink platform, which verifies the effectiveness of DC fault clearing capacity by using FLHBSM. © 2022, Electric Power Automation Equipment Press. All right reserved.
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页码：75 / 81
页数：6
相关论文
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