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真空灭弧室零区剩磁补偿装置及效果 被引量:5

The Device and Effect of the Magnetic Field Compensation in Vacuum Interrupters at Current-zero
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摘要 为研究纵磁真空灭弧室零区剩磁对电弧发展、弧后介质恢复强度的影响,建立10kV杯状纵磁触头真空灭弧室的暂态磁场模型,分析不同开距时零区剩余磁场分布和相位滞后情况,得到涡流对零区剩余磁场的影响规律。在此基础上,设计纵磁触头真空灭弧室零区剩磁补偿装置,该装置可实现脉宽0.5ms、磁场强度范围-50m T^50m T的自动补偿。搭建纵磁触头真空灭弧室零区剩磁补偿试验研究平台,通过高速CMOS相机拍摄电弧发展演变过程,采用弧后电流测量装置获得弧后特性参数,研究不同补偿磁场条件下的电弧发展过程、弧后电流和开断能力的影响规律。研究表明:电流为10kA时,杯状纵磁真空灭弧室零区剩磁为11.91~22.93mT,相位滞后为0.46~0.92ms,通过实验验证了零区剩磁补偿后开断能力提高了7.8%,所作研究为纵磁真空灭弧室触头优化和零区剩磁补偿提供了参考依据。 In order to investigate the influence of the residual magnetic field on the vacuum arc development and post arc dielectric recovery strength,the transient magnetic field model of the 10 k V vacuum interrupters(VIs)with the axial magnetic field(AMF)contact was established.The magnetic field distribution and the phase shift of the 10 kV VIs with AMF were analyzed.The influence of the eddy current at CZ was obtained.The residual magnetic field compensation method was proposed with external applied pulsed magnetic control,which is designed based on the Helmholtz coil.The pulse width is about0.5 ms while the magnitude can be adjusted from-50 m T to 50 mT.The experimental platform of residual magnetic compensation at CZ for AMF VIs is established.The influence of the CZ external pulsed magnetic field on the arc development,the post-arc current and the breaking ability is investigated.The experimental results show that when the current is 10 kA,the residual magnetic of the vacuum interrupter is 11.91~22.93 mT,and the phase shift is 0.46~0.92 ms.It is verified by experiments that the breaking capacity of the vacuum interrupter is increased by 7.8%with residual magnetic compensation.The study provides a reference for the optimization of the vacuum interrupters and magnetic field compensation at CZ.
作者 葛国伟 张鹏浩 程显 杨培远 王华清 GE Guowei;ZHANG Penghao;CHENG Xian;YANG Peiyuan;WANG Huaqing(College of Electrical Engineering,Zhengzhou University,Zhengzhou 450001,Henan Province,ChinaHenan Engineering Research Center of Power Transmission&Distribution Equipment and Electrical Insulation,Zhengzhou 450001,Henan Province,China)
出处 《中国电机工程学报》 EI CSCD 北大核心 2019年第11期3272-3280,共9页 Proceedings of the CSEE
基金 国家自然科学基金项目(51407163,51777025) 中国博士后科学基金项目(2017M622370) 河南省高校重点科研项目(16A470014,19A470008)~~
关键词 剩余磁场 真空开关 磁场补偿 弧后特性 真空电弧 residual magnetic field vacuum interrupters magnetic field compensation post-arc characteristic vacuum arcs
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