高电压技术2024，Vol.50Issue(5)：2128-2145,中插33-中插37,23.DOI:10.13336/j.1003-6520.hve.20232238
具备故障限流和快速故障清除能力的多端口直流断路器拓扑与控制策略
Topology and Control Strategies of a Multiport DC Circuit Breaker Integrating Cur-rent-limiting and Fast Fault Clearing Capabilities
摘要
Abstract
In order to solve the technical problems of fast clearing DC faults in DC grid,a multiport DC circuit breaker integrating current-limiting and fast fault clearing capabilities was proposed.Three control strategies were designed,in-cluding energization,fault interruption after current limiting and reset after current limiting.The proposed topology realizes a large reduction of current value at break time through a current limiting circuit.The time required for fault clearing is shortened by inductive bypass circuit.The proposed control strategy realizes the pre-charge of circuit breaker capacitor by multiplexing part of the topology loop.The operating sequence of circuit breaker is optimized by the method of preliminary fault judgment and secondary confirmation,and the current value at the break time is further reduced.A three-terminal DC grid simulation model is built in PSCAD/EMTDC,and various operating conditions of circuit breakers are simulated and verified.The results show that the multi-port DC circuit breaker can realize the protection of multiple DC lines,reduce the current value at break time and reduce the time required for fault interruption under all working con-ditions.关键词
直流电网/多端口/直流断路器/H桥/限流/直流故障Key words
HVDC grid/multi-port/DC circuit breaker/H-bridge/current-limiting/DC fault引用本文复制引用
黄云峰,肖晃庆,黄莹,杨苹,张勇军..具备故障限流和快速故障清除能力的多端口直流断路器拓扑与控制策略[J].高电压技术,2024,50(5):2128-2145,中插33-中插37,23.基金项目
广东省重点领域研发计划(2021B0101230001) （2021B0101230001）
广州市科技计划(202201010694).Project supported by Research and Development Program Project in Key Areas of Guangdong Province(2021B0101230001),Guangzhou Science and Technology Plan Project(202201010694). （202201010694）
