摘要
为解决城市轨道交通直流牵引系统短路故障电流上升率高、短路峰值大、难以快速开断的问题,设计了1800 V/10 kA高速混合式直流断路器,并提出了其高速开断策略。高速混合式直流断路器整体方案选用零电压型混合式直流断路器拓扑结构,采用快速斥力机构提升断路器响应速度,重点对真空电弧电流转移特性、真空短间隙介质恢复特性与绝缘栅双极型晶体管(IGBT)短脉冲开断裕量等关键基础特性进行研究,得到上述关键特点的影响规律,基于此提出了混合式直流断路器高速开断策略和算法。研制了1800 V/10 kA高速混合式直流断路器,进行了初步实验验证,研究结果表明,高速开断策略可实现全分断时间小于2 ms,并通过理论推导得到IGBT短脉冲开断裕量可以达到5倍以上。
In order to solve the short circuit fault current problems of sharp current rise rate,large amplitude of short circuit,and difficult to break instantly in the DC transit system of urban rail,an 1800 V/10 kA high-speed hybrid DC circuit breaker is designed and the corresponding high-speed breaking strategy is proposed.The overall scheme of high-speed hybrid DC circuit breaker adopts zero-voltage hybrid DC circuit breaker topology,and adopts a repulsive mechanism to improve the response speed of the circuit breaker.The vacuum arc current transfer characteristics,the vacuum short gap medium recovery characteristics and the surge current breaking capacity of the IGBT(Insulated Gate Bipolar Transistor)are emphatically researched to obtain the regular patterns of the above key characteristics,based on which,the high-speed breaking strategy and algorithm of hybrid DC circuit breaker are proposed.An 1800 V/10 kA high-speed hybrid DC circuit breaker is developed and preliminarily verified by experiments.The results show that the high-speed breaking strategy can achieve a full breaking time of less than 2 ms.It is deduced that the surge current breaking capacity of IGBT can reach more than five times.
作者
程显
王华清
葛国伟
赵海洋
CHENG Xian;WANG Huaqing;GE Guowei;ZHAO Haiyang(College of Electrical Engineering,Zhengzhou University,Zhengzhou 450001,China;Henan Engineering Research Center of Power Transmission&Distribution Equipment and Electrical Insulation,Zhengzhou 450001,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2020年第1期212-218,共7页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(51407163)
中国博士后科学基金面上资助项目(2017M622370)
国家轨道交通电气化与自动化工程技术研究中心开放课题资助项目(NEEC-2017-B07)
河南省高校重点科研项目(16A470014)~~
关键词
混合式断路器
电流转移
开断策略
城市轨道交通
直流断路器
hybrid circuit breaker
current communication
breaking strategy
urban rail transit
DC circuit breaker
作者简介
程显(1982-),男,河南平顶山人,教授,博士研究生导师,博士,主要研究方向为混合断路器技术、多断口真空开关技术(E-mail:chengxian@zzu.edu.cn);王华清(1994-),男,河南濮阳人,硕士研究生,主要研究方向为开关设备与绝缘技术(E-mail:237522104@qq.com);葛国伟(1987-),男,河南新乡人,讲师,博士,主要从事智能化高压电器及高电压新技术方面的研究工作,着重研究多断口真空开关技术、真空电弧动态恢复特性(E-mail:ggw@zzu.edu.cn)。
