强激光与粒子束, 2012, 24 (12): 2925, 网络出版: 2013-01-14
自磁场下绝缘子沿面闪络特征
Surface flashover character of insulator in vacuum under self-magnetic field
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%。
Abstract
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.
李逢, 王勐, 杨尊, 任靖, 康军军. 自磁场下绝缘子沿面闪络特征[J]. 强激光与粒子束, 2012, 24(12): 2925. Li Feng, Wang Meng, Yang Zun, Ren Jing, Kang Junjun. Surface flashover character of insulator in vacuum under self-magnetic field[J]. High Power Laser and Particle Beams, 2012, 24(12): 2925.