高压电器2024，Vol.60Issue(4)：101-112,12.DOI:10.13296/j.1001-1609.hva.2024.04.013
具备限流能力的混合式高压直流断路器拓扑
Hybrid High Voltage DC Circuit Breaker Topology with Current Limiting Capability
摘要
Abstract
DC circuit breaker(DCCB)is an important means to solve the short-circuit fault of DC system.In view of such a series of defects as weak current limiting effect,short operation life of arrester and slow fault isolation speed of the existing DCCB,a kind of hybrid high-voltage DC circuit breaker topology solution with current limiting capa-bility(CLC-HDCCB)is proposed in this paper.The CLC-HDCCB current-carrying branch and transfer branch adopt double-bridge structure and possesses bidirectional on-off capability.The current-limiting part adopts current-limit-ing resistor inductor in parallel to limit the current,which significantly reduces the peak value and rise rate of fault current.The designed bleeder resistor bypasses the current-limiting inductance during the circuit breaking process,which reduces the energy absorbed by the arrester in single breaking operation.In addition,various conditions oc-curred in such DC system as breaking fault current,normal closing operation and breaking small current of the CLC-HDCCB scheme is analyzed in detail and also the parameter selection method is given.Finally,the simulation verifi-cation is carried out on the PSCAD/EMTDC platform,and the results show that the proposed CLC-HDCCB scheme has certain advantages compared with the existing DCCB scheme in terms of fault current limiting,arrester energy absorption and fault clearing time.关键词
直流断路器/故障限流/重合闸/小电流分闸/能量吸收Key words
DC circuit breaker/fault current limiting/re-closing/breaking at small current/energy absorption引用本文复制引用
周蒙恩,王红艳,孙芮,钱阳,刘祚松,秦宇..具备限流能力的混合式高压直流断路器拓扑[J].高压电器,2024,60(4):101-112,12.基金项目
国家自然科学基金资助项目(51906098). Project Supported by National Natural Science Foundation of China(51906098). （51906098）
