Multilevel sub-module topology of MMC with DC fault clearance capability

被引：0
|
作者：
Chang F. [1 ]
Yang Z. [1 ]
Lin F. [1 ]
机构：
[1] School of Electrical Engineering, Beijing Jiaotong University, Beijing
来源：
Gaodianya Jishu/High Voltage Engineering | 2017年 / 43卷 / 01期
关键词：
DC fault; Fault clearance; HVDC; MMC; Sub-module topology; System recovery;
D O I：
10.13336/j.1003-6520.hve.20161227007
中图分类号：
学科分类号：
摘要：
DC fault clearance capacity of MMC-HVDC is directly related to the application of MMC-HVDC in the field of overhead lines and high voltage and large capacity applications. Consequently, we proposed a new kind of MMC improved topology. The capacitor voltage of the sub-module produced counter electromotive was used to forcibly eliminate the freewheeling effect of diodes, and to quickly remove the fault current. The principle of DC fault clearing and the voltage resistance of each power device are analyzed in detail, and the comparison with other topologies is also carried out. Moreover, the correctness and effectiveness of the new sub-module is verified by PSCAD/EMTDC simulation. The results show that the rated voltages of main IGBT and protection IGBT of the proposed topology are only half of the conventional design which can effectively reduce the cost of converter. © 2017, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：44 / 49
页数：5
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