Electrical Treeing Degradation Characteristics of GFRP Composites for Insulated Pull Rods Under Alternating Mechanical Loads

被引：0

作者：

Chen Y. ^{[1
]}

Han X. ^{[2
]}

Li J. ^{[1
]}

Zhao R. ^{[1
]}

Cui B. ^{[3
]}

Teng Y. ^{[4
]}

Hao L. ^{[5
]}

Du B. ^{[1
]}

机构：

[1] School of Electrical and Information Engineering, Tianjin University, Nankai District, Tianjin

[2] State Grid Corporation of China, Xicheng District, Beijing

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

[4] State Grid Jiangsu Electric Power Co., Ltd., Research Institute, Jiangsu Province, Nanjing

[5] Pinggao Group Co., Ltd., Henan Province, Pingdingshan

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2024年 / 44卷 / 06期

基金：

中国国家自然科学基金;

关键词：

alternating mechanical load; electrical tree degradation; gas insulated switchgear(GIS); glass fiber reinforced epoxy resin composite(GFRP); insulated pull rod;

D O I：

10.13334/j.0258-8013.pcsee.223444

中图分类号：

学科分类号：

摘要：

There have been multiple internal breakdown faults of the insulated pull rods during the field testing or operation of gas insulated switchgear(GIS). These faults can affect the engineering operation and equipment reliability, thus urgently necessitating the exploration of their underlying fault mechanisms.. In this paper, glass fiber reinforced epoxy resin composite(GFRP) for insulated pull rod of GIS circuit breaker is selected as the research object. The experimental conditions of electrical treeing degradation under alternating loads are set up by calculating the principal stress distribution characteristics in the insulated pull rod during the switching. The effects of different alternating loads on the growth characteristics of electrical tree in GFRP are studied. The results show that compared with congener load, the growth rate of electrical tree in GFRP increases, the average breakdown time decreases and the breakdown probability increases under alternating load. With the help of ABAQUS, it is found that there will be large stress concentration at the fiber-resin interface of GFRP under alternating loads and the local stress damage has reached the critical failure value of GFRP. In summary, the interactive evolution of mechanical damage and insulation degradation at the fiber-resin interface of insulation pull rod under alternating loads is the main cause of insulation breakdown, and it is also the improvement basis for experimental assessment and structural design. © 2024 Chinese Society for Electrical Engineering. All rights reserved.

引用

页码：2475 / 2484

页数：9

共 25 条

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