高压电器2026，Vol.62Issue(1)：32-41,10.DOI:10.13296/j.1001-1609.hva.2026.01.005
基于耦合负压的改进型多端口中压直流断路器拓扑研究
Research on Topology of Improved Multi-terminal MVDC Circuit Breaker Based on Coupled Negative Voltage
刘书瀚 1庄园 2李晨颉 3汪毅峰 3王若兰 3李江涛3
作者信息
- 1. 国网江苏省电力有限公司徐州供电分公司,江苏 徐州 221005
- 2. 江苏徐电建设集团有限公司,江苏 徐州 221005
- 3. 西安交通大学电气工程学院,西安 710049
- 折叠
摘要
Abstract
The reliability of VSC DC distribution network is set up on the basis of mature MV circuit breaker and,however,the high cost of DC circuit breaker limits its application in the distribution network.In order to reduce the investment cost of DC circuit breaker in VSC distribution network,a kind of improved multi-terminal hybrid DC cir-cuit breaker is designed based on coupled negative voltage commutation method.First,the topological structure of the existing DC circuit breaker is analyzed.Then,the topological structure of improved multi-port hybrid DC circuit breaker is proposed,and the operation sequence in interrupting the fault is designed.Finally,a four-terminal ring-main VSC DC distribution network is set up on the basis of Pscad/Emtdc,and the transient characteristics of the im-proved multi-terminal hybrid DC circuit breaker during bipolar short circuit fault interruption are analyzed.The dis-tribution of internal voltage and current is obtained and the feasibility of the designed fault isolation sequence is veri-fied.The results show that the improved multi-terminal hybrid DC circuit breaker can interrupt fault current within 3 ms,has low control difficulty and has more economical performance than other types of topology.关键词
混合式直流断路器/多端口/柔性直流配电/耦合负压/Pscad/EmtdcKey words
hybrid DC circuit breaker/multi-terminal/VSC DC power distribution/coupled negative-voltage/Pscad/Emtdc引用本文复制引用
刘书瀚,庄园,李晨颉,汪毅峰,王若兰,李江涛..基于耦合负压的改进型多端口中压直流断路器拓扑研究[J].高压电器,2026,62(1):32-41,10.
