电力系统保护与控制2026，Vol.54Issue(16)：153-167,15.DOI:10.19783/j.cnki.pspc.251193
适用于直流微电网保护的晶闸管型多端口直流断路器
A thyristor-based multiport DC circuit breaker for DC microgrid protection
摘要
Abstract
To address the issues of high cost and complex control associated with traditional two-port thyristor-based solid-state DC circuit breakers when extended to multi-port DC microgrids,a novel multi-port solid-state DC circuit breaker is proposed.The key idea is to employ an LC resonant circuit to achieve active and reliable turn-off of the thyristors in the conducting branch.By using a discharge circuit formed by the internal capacitors and the circuit,the proposed breaker identifies fault characteristics through the peak value of the discharge current,thereby enabling adaptive reclosing.Furthermore,the LC resonance is exploited to rapidly restore the capacitor polarity to its initial state before reclosing,eliminating the need for additional capacitor charging time.An equivalent mathematical model of the proposed topology for an n-port DC grid is established,and design principles for the key component parameters are presented.Both simulation and experimental results demonstrate that the proposed circuit breaker can achieve rapid fault interruption and adaptive reclosing.Compared with existing solutions,it offers superior economic efficiency and operational performance,providing a practical protection solution for multi-port DC microgrids.关键词
直流微电网/短路故障保护/固态式直流断路器/晶闸管/重合闸Key words
DC microgrid/short-circuit fault protection/solid-state DC circuit breaker/thyristor/reclosing引用本文复制引用
王顺亮,周及泓,李旭,辛清明,张依宁,秦科军,李明,马俊鹏,刘天琪..适用于直流微电网保护的晶闸管型多端口直流断路器[J].电力系统保护与控制,2026,54(16):153-167,15.基金项目
This work is supported by the National Natural Science Foundation of China(No.51977135). 国家自然科学基金项目资助(51977135) （No.51977135）
中国南方电网有限责任公司"数字电网"开放基金项目资助(DPGCSG-2024-KF-41) （DPGCSG-2024-KF-41）
