凝露环境中纳米氧化铝改性环氧树脂电气特性研究  

Research on electrical properties of nano-alumina modified epoxy resin in condensation environment

作　　者：杨占刚 陈孟贤 王晓峰 籍勇亮 谢传林 毕茂强 YANG Zhangang;CHEN Mengxian;WANG Xiaofeng;JI Yongliang;XIE Chuanlin;BI Maoqiang(Shibei Power Supply Branch,State Grid Chongqing Electric Power Company,Chongqing 401147,China;State Grid Chongqing Electric Power Company,Chongqing 400015,China;School of Electrical and Electronic Engineering,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]国网重庆电力公司市北供电分公司,重庆401147 [2]国网重庆市电力公司,重庆400015 [3]重庆理工大学电气与电子工程学院,重庆400054

出　　处：《绝缘材料》2024年第12期36-44,共9页Insulating Materials

基　　金：国家自然科学基金资助项目(51607019);国网重庆市电力公司科技项目(No.2023渝电科技50#)。

摘　　要：为解决高温高湿环境中开关柜绝缘器件表面易产生凝露导致绝缘性能显著下降的问题,本文通过添加不同质量分数的纳米氧化铝对E51型环氧树脂进行改性,并测试改性后样品的电气性能。结果表明:改性后的环氧树脂电阻率和介质损耗因数略微下降,在不同温差条件下形成的凝露环境中,纳米氧化铝质量分数为1%、3%、5%的改性环氧树脂清洁样品的闪络电压较未改性样品分别提升了56.7%、84.5%、66.7%,染污样品的闪络电压分别提升了10.8%、17.3%、14.9%,泄漏电流有效值较未改性样品分别降低了40.3%、46.6%、45.8%。综上,含3%纳米氧化铝的改性环氧树脂样品电气性能提升明显。In order to solve the problem of significant decrease of insulation performance caused by condensation on the surface of switchgear insulation components in high temperature and high humidity environments,in this paper,E51 epoxy resin was modified by adding different mass fractions of nano-alumina,and the electrical properties of the modified samples were tested.The results show that the resistivity and dielectric loss factor of the modified epoxy resin decrease slightly.In the condensation environment formed under different temperature difference,the flashover voltage of the modified epoxy resin clean sample with nano-alumina mass fraction of 1%,3%,and 5%is 56.7%,84.5%,and 66.7%higher than that of unmodified sample,respectively.With nano-alumina mass fraction of 1%,3%,and 5%,the flashover voltage of the contaminated sample is 10.8%,17.3%and 14.9%higher than that of unmodified sample,respectively,and the effective value of the leakage current is 40.3%,46.6%and 45.8%lower than that of unmodified sample,respectively.In summary,the electrical properties of modified epoxy resin samples containing 3%nano-alumina are improved significantly.

关 键 词：环氧树脂 纳米氧化铝 电气特性 凝露环境 

分 类 号：TM215[一般工业技术—材料科学与工程]