横磁作用下直流真空开断中触头侧部燃弧空间的影响规律研究  

Influence of Arcing Space at Contact Side on DC Vacuum Interruption Characteristics under Transverse Magnetic Field

作　　者：马慧[1] 刘志远[1] 耿英三[1] 陈金龙 张元兵 于琛 MA Hui;LIU Zhi-yuan;GENG Ying-san;CHEN Jin-long;ZHANG Yuan-bing;YU Chen(Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学,陕西西安710049

出　　处：《真空电子技术》2023年第5期19-24,共6页Vacuum Electronics

基　　金：国家重点研发计划资助项目(2022YFB2403700)。

摘　　要：随着直流电网的不断发展,对直流开断技术的要求进一步提高。相较于传统的气体电弧直流开断,真空电弧直流开断具有电寿命高、燃弧空间封闭、介质恢复速度快等特点,但是传统真空电弧电压低,需要通过横向磁场的作用,提升电弧电压完成直流真空电弧的开断。本文通过实验研究了横向磁场作用下不同触头侧部燃弧空间(即触头侧部边缘与真空灭弧室屏蔽罩之间的空间)与开断电流时的开断特性,获得了触头侧部燃弧空间宽度11~41 mm范围内对直流真空开断特性的影响规律。With the development of DC power grid,the requirements for DC circuit breaker technology are further enhanced.Compared with traditional DC switches in gas,vacuum arc DC switch has the characteristics of long electrical life,closed combustion arc space,and fast medium-recovery speed.However,the vacuum arc voltage is low,so it is necessary to increase the arc voltage by employing transverse magnetic field(TMF).The breaking characteristics with different arcing space at contact side(space between contact edge and interrupter shield)and different interrupting current under TMF are studied experimentally,and the influence law of arcing space width ranging from 11 to 41 mm on DC vacuum interrupting characteristics is obtained.

关 键 词：横向磁场 真空灭弧室 真空电弧 低压直流开断 

分 类 号：TM561[电气工程—电器]