Research on Fault Transient Characteristics of ±10 kV Ring-type VSC-DC Distribution Network with DC Circuit Breakers

LIU Shuhan; ZHUANG Yuan; LI Chenjie; WANG Yifeng; LI Jiangtao

doi:10.13296/j.1001-1609.hva.2026.04.003

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Research on Fault Transient Characteristics of ±10 kV Ring-type VSC-DC Distribution Network with DC Circuit Breakers

Research & Analysis | 更新时间：2026-04-08

- Research on Fault Transient Characteristics of ±10 kV Ring-type VSC-DC Distribution Network with DC Circuit Breakers
- High Voltage Apparatus Vol. 62, Issue 4, Pages: 29-39(2026)
- 作者机构：
  
  国网江苏省电力有限公司徐州供电分公司，江苏徐州 221005
  江苏徐电建设集团有限公司，江苏徐州 221005
  西安交通大学电气工程学院，西安 710049
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.04.003
  CLC：
- Received：11 October 2025，
  
  Revised：2026-01-07，
  
  Published：16 April 2026
- 稿件说明：
移动端阅览
LIU Shuhan, ZHUANG Yuan, LI Chenjie, et al. Research on Fault Transient Characteristics of ±10 kV Ring-type VSC-DC Distribution Network with DC Circuit Breakers[J]. High Voltage Apparatus, 2026, 62(4): 29-39.
DOI：

LIU Shuhan, ZHUANG Yuan, LI Chenjie, et al. Research on Fault Transient Characteristics of ±10 kV Ring-type VSC-DC Distribution Network with DC Circuit Breakers[J]. High Voltage Apparatus, 2026, 62(4): 29-39. DOI： 10.13296/j.1001-1609.hva.2026.04.003.

摘要

柔性直流配电网因其电能质量、供电效率以及运行成本等方面的突出优势备受青睐。作为一种新型的配电系统，柔直配电的故障暂态特性亟需进一步的研究和完善，直流断路器的加入也导致了系统故障暂态特性发生了根本变化。针对含直流断路器的环网型柔直配电网故障暂态特性研究，首先，构建了±10 kV环网型柔直配电网的电磁暂态仿真模型，基于有无直流断路器设计了两种系统保护动作方案；其次，将柔性直流配电系统分为4个故障区，选取需要重点研究的典型故障工况，确定电压监测点位置；最后，针对换流阀区域故障和直流线路故障，仿真分析了其无保护时的固有故障暂态特性以及有无直流断路器两种保护动作方案下的操作过电压暂态特征，并对其技术优势和应用前景进行比较。文中的研究对环网型柔性直流配电网的绝缘配合方案设计有较大意义。

Abstract

VSC-DC distribution networks are highly favored due to their outstanding advantages in power quality

power supply efficiency and operating costs. As a new type of power distribution system

the fault transient characteristics of the VSC- DC distribution require further research and improvement

and the integration of DC circuit breakers has also led to fundamental changes in the fault transient characteristics of the system. For the research on the fault transient characteristics of the ring-type VSC-DC distribution network with DC circuit breakers

first

an electromagnetic transient simulation model of a ±10 kV ring-type VSC-DC distribution network is constructed. Two system protection action schemes are designed based on the presence or absence of DC circuit breakers. Then

the VSC-DC distribution system is divided into four fault zones. Typical fault conditions that require focused study are selected

and the locations of voltage monitoring points are determined. Finally

for the faults in converter valve area and the DC line

the inherent fault transient characteristics without protection and the operating overvoltage transient characteristics under two protection action schemes with and without DC circuit breakers are analyzed

and its technical advantages and application prospects are compared. The research in this paper is of great significance to the design of insulation coordination scheme of the ring-type VSC-DC distribution network.

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