| 引用本文: | 程显,王华清,葛国伟,赵海洋.城市轨道交通1 800 V高速混合式直流断路器研制[J].电力自动化设备,2020,40(1): |
| CHENG Xian,WANG Huaqing,GE Guowei,ZHAO Haiyang.Research and design of 1 800 V high-speed hybrid DC circuit breaker for urban rail transit system[J].Electric Power Automation Equipment,2020,40(1): |
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| 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1 800 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1 800 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。 |
| 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 |
| DOI：10.16081/j.epae.202001002 |
| 分类号:TM561;TM92 |
| 基金项目: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) |
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| Research and design of 1 800 V high-speed hybrid DC circuit breaker for urban rail transit system |
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CHENG Xian1,2, WANG Huaqing1,2, GE Guowei1,2, ZHAO Haiyang1,2
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1.College of Electrical Engineering, Zhengzhou University, Zhengzhou 450001, China;2.Henan Engineering Research Center of Power Transmission & Distribution Equipment and Electrical Insulation, Zhengzhou 450001, China
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| Abstract: |
| 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 1 800 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 1 800 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. |
| Key words: hybrid circuit breaker current communication breaking strategy urban rail transit DC circuit breaker |
