Movement Behavior of Metal Particles and Its Induced Insulator Flashover Characteristics Under Impact Vibration in GIS

被引：0

作者：

Li X. ^{[1
]}

Liu W. ^{[1
]}

Xu Y. ^{[2
]}

Ding D. ^{[3
]}

机构：

[1] Department of Electrical Engineering, Tsinghua University, Haidian District, Beijing

[2] China Electric Power Research Institute, Haidian District, Beijing

[3] Sichuan Energy Internet Research Institute, Tsinghua University, Sichuan Province, Chengdu

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 07期

关键词：

flashover; gas insulated switchgear (GIS); metal particle; motion characteristic; switch operation;

D O I：

10.13334/j.0258-8013.pcsee.212967

中图分类号：

学科分类号：

摘要：

Metal particles are considered to be one of the main causes of insulation failure. During operation, the impact vibration generated by switch operation such as circuit breaker will cause static metal particles in gas-insulated switchgear (GIS) to jump, resulting in insulation performance degradation. Therefore, in this study, an experiment platform is established to study the motion and flashover characteristics of metal particles under impact vibration. Then the partial discharge characteristic of metal particles is analyzed and the influences of metal particle shape and size on motion and flashover characteristics are also discussed. The experiment results show that the metal particles in GIS will be activated by impact vibration. Metal particles can jump to adhere to the insulator surface or even cause insulator flashover. The linear metal particles with the length of 5mm or 6mm are easy to cause insulator flashover, while 4mm-long particles fail to cause flashover. The average runout duration of 5mm and 6mm long linear particles before flashover is 445s and 145s, respectively. Moreover, compared with linear particles, flake particles are more likely to adhere to the insulator surface. The results are helpful to understand the influence of switch operation on the motion and flashover characteristics of metal particles, and also effectively explain the insulation failures strongly related to switching operation. ©2023 Chin.Soc.for Elec.Eng.

引用

页码：2838 / 2847

页数：9

共 22 条

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