自磁场下绝缘子沿面闪络特征  

Surface flashover character of insulator in vacuum under self-magnetic field

作　　者：李逢[1] 王勐[1] 杨尊[1] 任靖[1] 康军军[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《强激光与粒子束》2012年第12期2925-2929,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(50937004)

摘　　要：基于磁场闪络抑制原理,研究回路电流产生的自磁场效应对固体材料绝缘性能的影响。通过计算电场强度与磁感应强度的临界比值,设计了同轴电极结构,确定了满足闪络抑制判据的电极尺寸,开展自磁场闪络抑制实验、自磁场闪络促进实验以及无磁场绝缘闪络实验,对比三种条件下绝缘材料的沿面闪络规律,分析磁场位形对材料绝缘特性的影响情况。实验结果表明:绝缘样品在自磁场闪络抑制效应影响下闪络电压提高了约15%,在自磁场促进闪络效应下闪络电压降低了约18%。The surface flashover character of insulator in vacuum under self-magnetic field is investigated in this paper through the principle of magnetic flashover inhibition（MFI）.Considering the calculation of the critical ratio between electric and magnetic field,a coaxial electrode was designed to carry out experiments under three different conditions： the self-magnetic field flashover inhibition,the self-magnetic field flashover acceleration and none magnetic field.The results show that the insulator surface flashover voltage is improved about 15% with the self-magnetic field flashover inhibition and is reduced about 18% with the self-magnetic field flashover enhancement compared with that without magnetic field.

关 键 词：绝缘 沿面闪络 自磁场闪络抑制 回路电流 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]