Fast Pre-charge Strategy of a Modified MMC with Enhanced DC Fault Ride-through Capability

被引:0
作者
Li, Dongye [1 ]
Sun, Yichao [2 ]
Zhao, Jianfeng [1 ]
Ji, Zhendong [3 ]
机构
[1] Southeast Univ, Sch Elect Engn, Nanjing, Jiangsu, Peoples R China
[2] Nanjing Normal Univ, Sch Elect & Automat Engn, Nanjing, Jiangsu, Peoples R China
[3] Nanjing Univ Sci & Technol, Sch Automat, Nanjing, Jiangsu, Peoples R China
来源
2017 IEEE 26TH INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS (ISIE) | 2017年
基金
中国国家自然科学基金;
关键词
MMC; DC fault ride-through; pre-charge strategy;
D O I
暂无
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
This paper proposes a modified topology of modular multilevel converter (MMC) to accelerate the DC fault ride-through speed. The modified topology mainly consists of a half bridge sub-module (HBSM) and a modified series double submodule (MSDSM). The difference between the series double submodule (SDSM) and the MSDSM is a damping resistance which is used to increase the capability of the energy dissipation when DC fault occurs. This improvement can disperse the energy to dissipate. Moreover, the selection of resistance is analyzed. In addition, an improved pre-charging strategy based on this modified topology is presented to shorten the start-up time of MMC. At the same time, the value of additional limiting resistance can be lowered because the damping resistances of the MSDSMs are more fully utilized. Simulation results demonstrate the validity of the proposed topology and pre-charging strategy.
引用
收藏
页码:717 / 722
页数:6
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