一种改进型限流式直流断路器拓扑  

An improved current-limiting DC circuit breaker topology

作　　者：刘进 樊艳芳[1] 孙瑶 王亚强 LIU Jin;FAN Yanfang;SUN Yao;WANG Yaqiang(School of Electrical Engineering,Xinjiang University,Urumqi 830017,China)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830017

出　　处：《电力科学与技术学报》2023年第2期30-39,共10页Journal of Electric Power Science And Technology

基　　金：2022天山英才培养计划(2022TSYCLJ0019);新疆维吾尔自治区高校科研重点项目(XJEDU2021I009)。

摘　　要：针对目前已有混合式直流断路器拓扑中存在的成本高、故障工况下电流过大的问题,本文基于传统直流断路器拓扑提出一种改进型限流式直流断路器拓扑结构。该拓扑的限流支路在故障发生后接入电路,可有效限制故障电流上升;转移支路由晶闸管和IGBT串联组成,减小IGBT使用数量;采用预充电电容给晶闸管提供反压使其关断,并提出一种电容预充电方案。首先分析所提拓扑的工作原理,然后对其进行参数设计,最后在PSCAD/EMTDC中搭建仿真模型,与传统断路器拓扑进行对比,验证所提拓扑的可靠性和经济性。In response to the problems of high cost and excessive fault current under fault conditions in existing hybrid DC circuit breaker topologies,this paper proposes an improved current limiting DC circuit breaker topology based on the existing traditional DC circuit breaker topology.The current-limiting branch of the topology was connected to the circuit after the fault occured,effectively limiting the rise of fault current.The transfer branch consisted of thyristor and IGBT in series to reduce the number of IGBT.A pre-charged capacitor was used to provide the reverse voltage for the thyristor,and a pre-charged scheme was proposed.The operation principle was analyzed based on the proposed topology,and then the parameters were designed.Finally,a simulation model was built in PSCAD/EMTDC,compared with the breaker with traditional topology,to verify the reliability and economy of the proposed topology.

关 键 词：直流断路器 限流电感 晶闸管 预充电电容 

分 类 号：TM762[电气工程—电力系统及自动化]