Topology of Hybrid DC Circuit Breaker with Common Transfer Branch

TIAN Hongjiang; ZHANG Yingmin; LI Junsong; ZHANG Mingqi

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Topology of Hybrid DC Circuit Breaker with Common Transfer Branch

更新时间：2025-12-08

- Topology of Hybrid DC Circuit Breaker with Common Transfer Branch
- Vol. 46, Issue 8, Pages: 2714-2722(2020)
- 作者机构：
  
  四川大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 August 2020，
  
  Published：2020
- 稿件说明：
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TIAN Hongjiang, ZHANG Yingmin, LI Junsong, et al. Topology of Hybrid DC Circuit Breaker with Common Transfer Branch[J]. 2020, 46(8): 2714-2722.
DOI：

TIAN Hongjiang, ZHANG Yingmin, LI Junsong, et al. Topology of Hybrid DC Circuit Breaker with Common Transfer Branch[J]. 2020, 46(8): 2714-2722. DOI：

摘要

针对现有混合直流断路器造价高、难以应用于多端电网的缺陷

提出了一种新型混合直流断路器拓扑。该拓扑采用共转移支路和二极管整流桥相结合的结构

以减少绝缘栅极晶闸管（insulated gate thyristors

IGBT）数量

并在转移支路串联附加电阻以减小故障电流峰值。针对此新型拓扑

该文详细分析了其在多端电网中的开断原理

采用换序电路法建立了故障电路数学模型

构建了故障电流与附加电阻之间的关系表达式。最后

利用PSCAD/EMTDC仿真软件搭建新型混合直流断路器仿真模型

结果表明采用共转移支路结构可有效减少IGBT使用数量

转移支路附加电阻可显著提高直流断路器开断容量。

Abstract

Aiming at the defects of the existing hybrid DC circuit breakers

which are expensive and difficult to be used in multi-terminal power grid

we propose a new hybrid DC circuit breaker topology. In the topology

a combination of a common transfer branch and a diode rectifier bridge is adopted to reduce the number of insulated gate thyristors（IGBTs）

and an additional resistor in series with the transfer branch to reduce the peak value of the fault current. Aiming at this new topology

we analyze its breaking principle in multi-terminal power grid in detail

establish a mathematical model of fault circuit by using the replacement circuit method

and construct a relation expression between fault current and additional resistance. Finally

we establish a simulation model of the new hybrid DC circuit breaker by the PSCAD/EMTDC simulation software. The results show that the number of IGBTs can be effectively reduced by using common transfer branch structure

and the additional resistance of transfer branch can significantly improve the breaking capacity of DC circuit breaker.

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