低压直流固态断路器关键技术研究  

Research on Key Technology of Low Voltage DC Solid State Circuit Breaker

作　　者：吴鑫 陶闯闯 王景帅 吴益飞[1] 吴翊[1] WU Xin;TAO Chuangchuang;WANG Jingshuai;WU Yifei;WU Yi(School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学电气工程学院,陕西西安710049

出　　处：《电器与能效管理技术》2024年第1期1-5,70,共6页Electrical & Energy Management Technology

摘　　要：相较于机械式断路器,固态断路器因其更快的分断速度和更高的寿命等优点被广泛关注。介绍了一种基于SiC器件的低压直流固态断路器拓扑和工作原理,分析其技术难点,包括低感封装及器件设计、隔离开关技术和快速故障识别技术。研制了一种±375 V直流固态断路器样机,同时进行了故障电流关断测试和温升测试。结果表明所设计直流固态断路器能够在百微秒内实现1 kA短路电流分断,并具备快速故障识别、保护曲线可编程、外部通信与远程控制等功能。Compared with the mechanical circuit breakers,the solid-state circuit breakers have been widely focused for their advantages such as the faster breaking speed and higher lifetime.A low-voltage DC solid-state circuit breaker topology and operating principle based on SiC devices is introduced,and the technical difficulties of solid-state circuit breakers are analyzed,including the low-inductance package and device design,the isolated switch technology and the fast fault identification technology.A prototype of±375 V DC solid-state circuit breaker is developed and tested for the fault current breaking and the temperature rise.The results show that the DC solid-state circuit breaker can achieve 1 kA short-circuit current breaking within a hundred microseconds.In addition,the prototype is equipped with the functions such as the fast fault identification,the programmable protection curve,the external communication and the remote control.

关 键 词：固态断路器 SIC器件 器件封装 快速故障识别 

分 类 号：TM561[电气工程—电器]