摘要
传统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,但由于其自身力学性能欠佳,极易受强风及鸟啄损伤,严重影响着材料本身的绝缘性能。针对这一情况,采用实验室自制的改性脂环族环氧树脂高聚物复合绝缘子与传统HTV硅橡胶绝缘子在直流电晕老化性能方面进行对比,研究了环氧树脂复合绝缘子在高电压状态的老化特性。试验结果表明:直流电晕老化后环氧树脂的憎水恢复速度较慢于硅橡胶,但完全满足憎水性运行要求;而通过直流击穿场强测试发现,环氧树脂与HTV硅橡胶相比具有更好的直流击穿特性;邵氏硬度测试和拉伸性能测试表明环氧树脂材料的拉伸强度和硬度均远高于硅橡胶,具有更好的力学性能,已达到防鸟啄和耐踩踏的目的。因此,文中设计的改性环氧树脂材料可为特高压直流输电工程地区绝缘子的使用提供了一个新的发展方向。
The traditional HTV silicone rubber composite insulators are widely used in transmission lines at home and abroad due to their excellent hydrophobicity and hydrophobicity mobility.However,due to its poor mechanical properties,it is vulnerable to strong winds and bird pecking damage,which seriously affects the insulation performance of the material.In view of this situation,the laboratory-made modified alicyclic epoxy resin high polymer composite insulator was compared with the traditional HTV silicone rubber insulator in terms of DC corona aging performance,and the aging characteristics of high polymer composite insulator in high voltage state are studied.The test results show that the hydrophobic recovery rate of epoxy resin is slower than that of silicone rubber after DC corona aging,but it can meet the hydrophobic operation requirements completely.The DC breakdown field strength test shows that epoxy resin has better DC breakdown characteristics than HTV silicone rubber.The Shore hardness test and the tensile test show that the tensile strength and hardness of the epoxy resin material are much higher than that of the silicone rubber,which has better mechanical properties and has achieved the purpose of resisting bird pecking and trampling.The modified epoxy resin material designed in this paper can provide a new direction for the development of the insulators in UHVDC transmission project area.
作者
黄新波
杨文博
田毅
袁正康
HUANG Xinbo;YANG Wenbo;TIAN Yi;YUAN Zhengkang(College of Electronics and Information,Xi’an Polytechnic University,Xi’an 710048,Shaanxi Province,China)
出处
《电网技术》
EI
CSCD
北大核心
2020年第11期4454-4463,共10页
Power System Technology
基金
国家自然科学基金项目(51177115)
陕西省自然科学基础研究计划项目(2018JM5137)
陕西省教育厅专项科研计划项目(18JK0345)。
