中国电机工程学报2024，Vol.44Issue(6)：2475-2484,后插33,11.DOI:10.13334/j.0258-8013.pcsee.223444
交变载荷下绝缘拉杆用GFRP电树枝劣化特性
Electrical Treeing Degradation Characteristics of GFRP Composites for Insulated Pull Rods Under Alternating Mechanical Loads
摘要
Abstract
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.关键词
气体绝缘组合电器/绝缘拉杆/交变载荷/玻璃纤维增强环氧树脂复合材料/电树枝劣化Key words
gas insulated switchgear(GIS)/insulated pull rod/alternating mechanical load/glass fiber reinforced epoxy resin composite(GFRP)/electrical tree degradation分类
信息技术与安全科学引用本文复制引用
陈允,韩先才,李进,赵仁勇,崔博源,腾云,郝留成,杜伯学..交变载荷下绝缘拉杆用GFRP电树枝劣化特性[J].中国电机工程学报,2024,44(6):2475-2484,后插33,11.基金项目
国家自然科学基金项目(52377153) （52377153）
国家电网有限公司科技项目(SGJSDK00SDJS2100074).Project Supported by National Natural Science Foundation of China(52377153) （SGJSDK00SDJS2100074）
Science and Technology Project of State Grid Corporation of China(SGJSDK00SDJS2100074). （SGJSDK00SDJS2100074）
