电瓷避雷器Issue(3)：140-147,156,9.DOI:10.16188/j.isa.1003-8337.2024.03.018
酥朽复合绝缘子护套电蚀孔形成过程模拟及分析
Simulation and Analysis of Electro-Erosion Hole Formation Process in Decay-Like Composite Insulator Sheath
摘要
Abstract
Lateral electro-erosion holes developed from the inside to the outside will appear on the sheath of the rotten and fractured composite insulator.The formation of galvanic pits is mainly caused by partial discharge at the defect inside the sheath,and the occurrence of partial discharge is closely related to the electric field distribution in the defect.In order to study the formation process of the electro-cor-rosion hole in the sheath of the rotten composite insulator,the author simulates the development process of the sheath corrosion hole based on the spherical growth model of the silicon rubber electrical tree,and analyzes the location of the corrosion hole and the electric field change during the development of the cor-rosion hole.The change of the silicone rubber material in the etched hole of the rotten composite insulator sheath is analyzed,and the embedded three-layer structure of the silicone rubber material on the surface of the etched hole is proposed.The results show that:when the initial defect appears at the minimum val-ue of the original axial electric field and its appearance position is close to the high voltage end,the ini-tial defect is easy to develop and penetrate into the transverse electro-erosion hole;the longitudinal development speed of the electro-erosion hole is faster than the lateral development process.It will form the shape of the pit with large inside and small outside;the infiltration of water is caused by the dual action of the aging of the silicone rubber material in the pit and the aging of the outer sheath surface.关键词
酥朽断裂/复合绝缘子护套/电蚀孔/嵌入三层结构/硅橡胶材料Key words
decay-like fracture/composite insulator sheath/electro-erosion hole/embedded three-tier structure/silicone rubber material引用本文复制引用
郭浚安,李黎,卢明,江渺,郭景润,邹乔戈..酥朽复合绝缘子护套电蚀孔形成过程模拟及分析[J].电瓷避雷器,2024,(3):140-147,156,9.基金项目
国家自然科学基金(编号:52077091).Project supported by National Natural Science Foundation of China(NSFC)(No.52077091). （编号:52077091）
