Redundancy protection and running-with-fault method for sub-module faults in modular multilevel converter

被引：0

作者：

Du X. ^{[1
]}

Mei J. ^{[2
]}

Tian J. ^{[3
]}

Li R. ^{[1
]}

Ma T. ^{[2
]}

Zheng J. ^{[2
]}

机构：

[1] State Grid Jiangsu Electric Power Maintenance Branch Company, Nanjing, 211102, Jiangsu Province

[2] School of Electrical Engineering, Southeast University, Nanjing, 210096, Jiangsu Province

[3] NanRi-Relays Electric Co., Ltd., Nanjing, 211102, Jiangsu Province

来源：

Dianwang Jishu/Power System Technology | 2016年 / 40卷 / 01期

关键词：

Loop mapping; Modular multilevel converter; Running with fault; Sub-module;

D O I：

10.13335/j.1000-3673.pst.2016.01.003

中图分类号：

学科分类号：

摘要：

This paper describes operation mechanism of modular multilevel converter (MMC) and damage analysis of sub-module faults in MMC. Because traditional redundancy protection strategy shows disadvantage of complicated structure and time-consuming computation, this paper proposes a new protection strategy by combining redundancy protection strategy with selective virtual loop mapping (SVLM) method. By combining virtual sub-module method inside, the method puts hot standby sub-module into loop mapping with advantage of reducing computation in sorting algorithm and increasing put-in-speed of redundancy sub-module. For sub-module fault without hot stand-by, two methods named lack of level operating scheme (LLOS) and line-voltage constant operating scheme (LCOS) are proposed to maintain system stability in single sub-module fault condition. Experiments on five-level MMC platform confirm effectiveness and feasibility of the proposed methods. © 2016, Power System Technology Press. All right reserved.

引用

页码：19 / 25

页数：6

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