直流gil中自由线形金属微粒的运动与放电特性.pdf

第 36 卷 第 17 期 中 国 电 机 工 程 学 报 Vol.36 No.17 Sep. 5, 2016 2016 年 9 月 5 日 Proceedings of the CSEE ©2016 Chin.Soc.for Elec.Eng. 4793 DOI ：10.13334/j.0258-8013.pcsee.152590 文章编号：0258-8013 (2016) 17-4793-08 中图分类号：TM 851 直流GIL 中自由线形金属微粒的运动与放电特性 王健，李庆民，李伯涛，刘思华，王志远 (华北电力大学电气与电子工程学院，北京市 昌平区 102206) Motion and Discharge Behavior of the Free Conducting Wire-type Particle Within DC GIL WANG Jian, LI Qingmin, LI Botao, LIU Sihua, WANG Zhiyuan (School of Electrical Electronic Engineering, North China Electric Power University, Changping District, Beijing 102206, China) ABSTRACT: Aiming at restraining the free conducting 微粒的起动场强与微粒的长度基本无关，而与微粒的半径开 wire-type particles that were common but dangerous within DC 方成正比，微粒越短，起动后越易达到跳跃运动状态，而微 GIL, a more realistic platform of coaxial cylindrical electrode 粒越长，越易保持站立状态；微粒引起的局部放电随着微粒 was set up using high-speed camera and PD monitor, in the 长度的增大而更加剧烈；对于跳跃的自由线形微粒，其引起 meanwhile, as to observe the motion, PD and breakdown of the 的微放电击穿间距随着微粒长度的增加而增加，击穿电压随 particles. This paper gave a quantitative study on the 着微粒长度的增加而降低。 probabilities of standing or bouncing which could be affected 关键词：直流气体绝缘金属封闭输电线路(gas insulated metal by the length of the particle. Particle’s Corona images were enclosed transmission line，GIL)；自由线形金属微粒；运动 recorded, also, the PD signals were monitored and extracted 模式；局部放电特征；微放电间距 which were triggered by the wire-type particles. The breakdown images were also taken, and mechanism analysis of 0 引言 the air–gap breakdown with free conductin