Research on DC Fault Isolation Voltage Based on Proportions of Full Bridge Sub-modules of Hybrid MMC

被引：0

作者：

Deng S. ^{[1
]}

Zhou N. ^{[1
]}

Wang Y. ^{[2
]}

Lian R. ^{[2
]}

Ran L. ^{[1
]}

机构：

[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing

[2] State Grid Chengdu Electric Power Supply Company, Chengdu

来源：

Gaodianya Jishu/High Voltage Engineering | 2018年 / 44卷 / 10期

基金：

国家重点研发计划;

关键词：

DC distribution network; DC side two-pole short-circuit; Fault isolating; Hybrid MMC; Proportions of FBSMs;

D O I：

10.13336/j.1003-6520.hve.20180925015

中图分类号：

学科分类号：

摘要：

Compared to traditional Modular Multilevel Converter (MMC), Hybrid Modular Multilevel Converter is a newer DC converter topology. The topology includes both full bridge sub-modules and half bridge sub-modules. Consequently, the advantages of the full bridge sub-module isolation DC side bipolar short-circuit fault and the economics of the half-bridge sub-module are simultaneously achieved. We studied the isolating DC side short-circuit faults ability of hybrid MMC with different full bridge sub-modules' proportions. The fault isolation voltage value of the full bridge sub-module capacitor was derived by analyzing the equivalent circuit diagram under the short-circuit fault state. Thereby, the formula for calculating the full bridge sub-modules' proportion critical value of the hybrid MMC which can effectively isolate the DC side bipolar short-circuit fault was derived. Finally, the above analysis results were confirmed by PSCAD simulation. It can be concluded that the proportion of the full bridge sub-module which is designed reasonably has practical significances for saving the cost of the hybrid MMC and improving its ability to isolate DC faults. © 2018, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

引用

页码：3250 / 3257

页数：7

共 19 条

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