Spacer flashover in SF6 under steep-fronted impulse voltages

被引：0
|
作者：
Chen, Qingguo [1 ]
Wang, Yonghong [1 ]
Wei, Xinlao [1 ]
机构：
[1] Harbin Univ Sci & Technol, Sch Elect & Elect Engn, Harbin 150040, Peoples R China
来源：
ICPASM 2005: PROCEEDINGS OF THE 8TH INTERNATIONAL CONFERENCE ON PROPERTIES AND APPLICATIONS OF DIELECTRIC MATERIALS, VOLS 1 AND 2 | 2006年
关键词：
GIS spacer VFTO predischarge flashover;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Very fast transient overvoltages (VFrO) might result from flashover of the particle-contaminated spacer in gas-insulated switchgear (GIS). To get a better understanding of the effects of voltage wavefront steepness and oscillation frequency on the flashover voltage, experiments were carried out on a simple cylindrical spacer with a metallic protrusion under different voltage waveforms. The results show that the flashover voltage-time (V-t) characteristics are dependent on oscillation fi-equency and rise time of impulses. The space charge accumulation produced by corona discharge of the metallic particle on the spacer is the main reason that causes the insulation failure of GIS.
引用
收藏
页码：739 / +
页数：2
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