一种可选择中断的混合式直流断路器拓扑  

A Hybrid DC Circuit Breaker Topology with Selective Interruption

作　　者：吴铁洲[1] 方畅 陈子奇 WU Tiezhou;FANG Chang;CHEN Ziqi(Hubei Key Laboratory for High-Efficiency Utilization of Solar Energy and Operation Control of Energy Storage System,Hubei University of Technology,Wuhan Hubei 430068,China)

机构地区：[1]湖北工业大学太阳能高效利用及储能运行控制湖北省重点实验室,湖北武汉430068

出　　处：《电子器件》2024年第4期981-986,共6页Chinese Journal of Electron Devices

基　　金：国家自然科学基金项目(51677058);太阳能高效利用及储能运行控制湖北省重点实验室开放基金项目(HBSEES202102)。

摘　　要：传统的混合式直流断路器应对瞬时性故障时必须先切断故障电流,再进行重合闸,会造成短暂性的电能供应中断。对此,提出一种适用于中压直流的可选择中断混合式直流断路器拓扑。该断路器可根据不同的故障类型选择运行方式,在与主导通支路串联的桥式结构中增加电容和限流电感抑制故障的电流上升,并储存能量,通过释能电阻对能量进行释放。对所提出的拓扑进行工作过程和理论分析。在单端直流等效系统中进行仿真验证,该结构在应对永久性短路故障时,可在9 ms内切除故障;应对瞬时性故障时,可使系统在不中断电流的情况下恢复正常运行,并释放故障时产生的能量。仿真结果验证了该拓扑的优越性。The traditional hybrid DC circuit breaker must first cut off the fault current and then reclose when dealing with transient faults,which will cause transient power supply interruption.A hybrid circuit breaker for DC-application topology suitable for medium voltage DC with selectable interrupt is proposed.The circuit breaker can select the operation mode according to different fault types.In the bridge structure connected in series with the main pass branch,the capacitance and the current limiting inductance are added to suppress the current rise of the fault,and the energy is stored.Finally,the energy is released by the energy releasing resistor.The working process and theoretical analysis of the proposed topology are carried out.Simulation verification is carried out in a single-ended DC equivalent system.The structure can remove the fault within 9 ms when dealing with permanent short-circuit faults.When dealing with transient faults,the system can resume normal operation without interrupting the current and release the energy generated during the fault.Simulation results verify the superiority of the topology.

关 键 词：混合式直流断路器 永久性故障 瞬时性故障 可选择中断 

分 类 号：TM561[电气工程—电器]