A Clamp Dual Capacitor Submodule of MMC With DC Fault Current Blocking Capability

WANG Chen; XU Tong; WANG Yi; TAO Jianye; WEI Xiaoguang; WANG Xinying

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A Clamp Dual Capacitor Submodule of MMC With DC Fault Current Blocking Capability

更新时间：2025-12-08

- A Clamp Dual Capacitor Submodule of MMC With DC Fault Current Blocking Capability
- Vol. 47, Issue 5, Pages: 1729-1739(2021)
- 作者机构：
  
  1. 先进输电技术国家重点实验室(全球能源互联网研究院有限公司)
  2. 河北省分布式储能与微网重点实验室(华北电力大学)
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 May 2021，
  
  Published：2021
- 稿件说明：
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WANG Chen, XU Tong, WANG Yi, et al. A Clamp Dual Capacitor Submodule of MMC With DC Fault Current Blocking Capability[J]. 2021, 47(5): 1729-1739.
DOI：

WANG Chen, XU Tong, WANG Yi, et al. A Clamp Dual Capacitor Submodule of MMC With DC Fault Current Blocking Capability[J]. 2021, 47(5): 1729-1739. DOI：

摘要

模块化多电平换流器（modular multilevel converter

MMC）是柔性直流输配电领域的优选拓扑之一

但其传统半桥子模块（half-bridgesubmodule

HBSM）不具备阻断直流故障电流的能力。为此

推导了一种基于双向开关的钳位双电容子模块（clamp dual capacitor submodule

CDCSM）

该子模块包含两个电容

能够输出3个电平

通过将电容引入故障回路可实现对故障电流的快速阻断。与其他能够阻断直流故障电流的子模块相比

CDCSM具有一定的成本优势

且运行损耗较低。基于Matlab/Simulink的仿真结果表明

CDCSM-MMC可快速阻断直流故障电流

且故障后电容电压较为均衡

有利于MMC的快速重启。

Abstract

The modular multilevel converter（MMC） is one of the preferred topologies in flexible DC transmission. However

the traditional half-bridge submodule（HBSM） cannot block the DC fault current. Therefore

a clamp dual capacitor submodule（CDCSM） based on bidirectional switch is derived in this paper. The CDCSM contains two capacitors and can output three levels

and possesses the capability of blocking fault current by introducing capacitors into fault circuits. Compared with other submodules that can block DC fault current

CDCSM possesses certain superiorities in investment cost and operation loss. Simulation results based on Matlab/Simulink show that CDCSM-MMC can fast block the DC fault current

and the capacitor voltages of submodules are relatively balanced after the fault

which is beneficial to the rapid restart of MMC.

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Related Author

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LI Tianze

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Related Institution

College of Electrical Engineering,Sichuan University

College of Electrical Engineering, Zhejiang University

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School of Electrical Engineering, Beijing Jiaotong University

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