硅橡胶复合绝缘子紫外老化研究综述OA

With the continuous construction of ultra-high voltage networks in China,composite insulators are gradu-ally applied in high-altitude regions with intense ultraviolet radiation.Under solar ultraviolet riiadiation,the sili-cone rubebr of the composite insulators undergoes UV aging,affecting its mechanical,electrical and material proper-ties,leading to breakdown of chemical bonds in the composite insulator,the formation of voids and particles on the maaterial surface,increase of hardness and,consequently,affecting the breakdown strength,surface resistivity and volume resistivity of the insualtor as well as reducing its long-term service life and the safety of power grid opera-tion.In this paper,the mechanisms by which ultraviolet radiation affects silicone rubber,as reported by domestic and international scholars,are summarized.The influence of ultraviolet rays on the macroscopic and microscopic properties of silicone rubber is analzed.The application of anti-ultraviolet aging methods in silicone rubber materi-als is discussed,the differences between different artificially accelerated ultraviolet aging methods are compared and the suggestions for improving the anti-ultraviolet aging performance of silicone rubber is given so to provide ref-erence for researchers in the field of composite insulator aging.