摘要
为探明极寒地区复合绝缘子老化机理,本文采用改进多因素老化方法,研究老化时间对复合绝缘子伞裙理化性能、力学性能以及电气性能的影响规律。结果表明:随着老化时间的增加,硅橡胶材料表面出现裂纹、孔洞和颗粒物堆积等现象,憎水性明显降低,材料整体硬度增加,断裂伸长率迅速降低,力学性能明显下降。同时,硅橡胶材料的介电常数明显增大,介质损耗不断增加,深陷阱能级密度变低,浅陷阱能级密度升高,表面电导率大幅增加,闪络电压急剧下降。
In order to investigate the ageing mechanism of composite insulators in extreme cold regions,the influence of ageing time on the physicochemical,mechanical,and electrical properties of composite insulator skirts were studied by an improved multi-factor ageing method.The results show that with the increase of the ageing time,cracks,holes and particle accumulation appear on the surface of the silicone rubber material,that leads to the significant decrease of its hydrophobicity.At the same time,the overall hardness of the silicone rubber material increases,the elongation at break decreases rapidly,and the mechanical properties decrease significantly.In addition,with the increase of ageing time,the dielectric constant increases significantly,the dielectric loss keeps increasing,the density of deep trap energy level gets lower,the density of shallow trap energy level increases,the surface conductivity increases significantly,and the flashover voltage decreases sharply.
作者
张欣伟
周丽英
王博
戴雨薇
端木天翔
郭鑫喆
刘佳浩
邢云琪
ZHANG Xinwei;ZHOU Liying;WANG Bo;DAI Yuwei;DUANMU Tianxiang;GUO Xinzhe;LIU Jiahao;XING Yunqi(State Grid East Inner Mongolia Electric Power Research Institute,Huhehaote 010000,China;State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology,Tianjin 300130,China)
出处
《绝缘材料》
CAS
北大核心
2024年第2期100-105,共6页
Insulating Materials
基金
国网内蒙古东部电力有限公司科技项目(SGMDDKOOGGJS2100128)。
关键词
多因素老化
极寒地区
复合绝缘子
硅橡胶伞裙
老化性能
multi-factor ageing
extreme cold regions
composite insulator
silicone rubber umbrella skirt
ageing performance
