电力系统及其自动化学报2026，Vol.38Issue(6)：56-66,11.DOI:10.19635/j.cnki.csu-epsa.001801
直流断路器失灵的故障隔离及其在嵌入式直流系统的适用性分析
Fault Isolation Scheme for DC Circuit Breaker Failures and Analysis of Its Applicability in Embedded DC System
摘要
Abstract
As a key device for clearing the DC fault current,the DC circuit breaker(DCB)has a complex topology and numerous components.As a result,its failure probability in engineering applications is higher,and the corresponding failure scenarios are also diverse.To solve these problems,a fault isolation method for DCB failures is proposed,and its applicability in an embedded DC system is analyzed.First,three different DCB topologies are analyzed,and their ex-ternal characteristics under different component failures are summarized.A monitoring algorithm for DCB operation sta-tuses is proposed,and an identification criterion for classifying failures is formulated,which classifies the DCB opera-tion statuses into normal operation,slight failure and severe failure.Second,according to the DCB operation statuses,different backup fault isolation schemes are proposed,such as short-time blocking of converter and AC circuit breaker tripping.Third,with the combination of the development features of Jiangsu power grid,the characteristics of the em-bedded DC system are analyzed,and the applicability of the proposed method in this DC system is examined.Simula-tion results prove that the proposed DCB operation status monitoring method can accurately distinguish the operation sta-tuses.The backup fault isolation scheme can clear the fault current in time and complete the transfer of DC power in the embedded DC system to AC transmission lines,ensuring the safe operation of the system under DC faults.关键词
直流断路器/失灵保护/故障隔离/外特性Key words
DC circuit breaker(DCB)/failure protection/fault isolation/external characteristic分类
信息技术与安全科学引用本文复制引用
韩杏宁,张哲,赵菲菲,张文嘉,许偲轩,温伟杰..直流断路器失灵的故障隔离及其在嵌入式直流系统的适用性分析[J].电力系统及其自动化学报,2026,38(6):56-66,11.基金项目
国家电网有限公司科技项目资助(J2025030). （J2025030）
