高聚物复合绝缘子紫外老化性能研究

Study on UV Aging Properties of Polymer Composite Insulators

传统高温硫化(HTV)硅橡胶复合绝缘子以其优异的憎水性和憎水迁移性,广泛应用于国内外输电线路上。但随着特高压工程的开展,越来越多的输电线路需要跨越强紫外辐射、强风沙以及鸟啄频发地区,而在这类气候恶劣地区极易造成传统HTV硅橡胶绝缘子外绝缘性能的下降以及材料的损伤。针对这一情况,采用耐紫外线、耐气候性能强,机械性能稳定的高聚物复合绝缘子与传统HTV硅橡胶绝缘子在紫外老化性能方面进行对比,旨在研究高聚物复合绝缘子在西北高原强紫外辐射地区的老化特性。研究结果表明:在短波紫外光(UVC)持续照射下,环氧材料的拉伸强度和硬度均远高于硅橡胶,具有更好的韧性,已达到防鸟啄和耐踩踏的目的,但憎水性相比较于硅橡胶材料仍略有不及,但仍满足户外运行要求。

The traditional HTV silicone rubber composite insulator is widely used in transmission lines at home and abroad due to its excellent hydrophobicity and hydrophobicity mobility.However,with the development of UHV,more and more transmission lines need to pass through the areas with strong ultraviolet radiation,strong wind&sand and frequent bird pecking,where the harsh climate is prone to cause the decline of the external insulation performance of traditional HTV silicone rubber insulators and the damage of materials.In view of this situation,a comparison is made between the high polymer composite insulators,which has good UV-resistance performance and stable mechanical properties,and the traditional HTV silicone rubber insulators in terms of ultraviolet aging properties.The purpose of this study is to investigate the aging characteristics of polymer composite insulators in the northwest plateau area with strong ultraviolet radiation.The results of the study show that under continuous irradiation of short wave ultraviolet light,the epoxy material has a tensile strength and hardness much better than silicone rubber,and has good toughness that meets the purpose of bird pecking-resistance and treading-resistance;it is slightly inferior to silicone rubber in hydrophobicity,but still meets the requirements of outdoor operation.