真空中光敏树脂的沿面闪络和放电老化特性  

Photosensitive Resin Surface Flashover and Discharge Aging Characteristics in Vacuum

作　　者：冉慧娟 张金梁 耿召阳 王萌[2,3] 王珏[2,3] 严萍[2,3] RAN Huijuan;ZHANG Jinliang;GENG Zhaoyang;WANG Meng;WANG Jue;YAN Ping(Department of Electrical Engineering,North China Electric Power University,Baoding 071003,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;Key Laboratory of Power Electronics and Electric Drive,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]华北电力大学电力工程系,保定071003 [2]中国科学院电工研究所,北京100190 [3]中国科学院电力电子与电力驱动重点实验室,北京100190

出　　处：《高电压技术》2020年第10期3583-3590,共8页High Voltage Engineering

基　　金：国家自然科学基金(51507066,51377153);中央高校基本科研业务费专项资金(2018MS084)。

摘　　要：光敏树脂是3D打印技术中常用的材料,将这种技术应用于高压电力设备绝缘支撑材料的制作(如表面刻槽、不同绝缘体形状等),能够满足个性化的生产需求。为了分析光敏树脂的沿面闪络性能和连续放电对表面造成的损伤,首先对其与常规绝缘子的闪络性能进行对比;其次,对光敏树脂表面进行连续放电处理,对不同放电次数下的闪络电压、表面形貌、放电电弧、发射光谱进行观测,采用威布尔分布分析连续放电过程中的老练和老化效果。实验结果表明:光敏树脂的沿面闪络电压稍高于聚四氟乙烯和尼龙;连续放电过程中,老练和老化共存,但以老化为主;阴极三结合点附近的表面形貌和固定放电侵蚀通道的形成都是影响绝缘性能的重要因素;连续放电后,由于电弧灼烧,绝缘子发生分解和碳化,随着放电次数的增加,参与形成放电等离子体通道的C2减少。研究结果可为高压真空固体绝缘部件制作提供选材和设计方面的参考。Photosensitive resin is a common material in 3D printing technology,which can be applied to the production of insulation support materials for high-voltage power equipment(such as surface grooves,different insulator shapes,etc.)to meet the needs of individual production.In order to analyze the surface flashover performance of photosensitive resin and the surface damage caused by continuous discharge,the flashover performance of photosensitive resin was compared with that of conventional insulator.Moreover,continuous discharge was carried out in the surface layer of photosensitive resin,and the flashover voltage,surface morphology,arc and emission spectrum were observed under different discharge times.The Weibull distribution was used to analyze the regulation and aging effects of continuous discharge.The experimental results show that the flashover voltage of photosensitive resin is slightly higher than that of polytetrafluoroethene and nylon.In the process of continuous discharge,burning-in and aging will coexist,but mainly in a form of aging.The surface morphology near cathode triple junction and the formation of fixed discharge erosion channel are important factors affecting the insulation performance.After continuous discharge,the insulator is decomposed and carbonized due to arc burning.With the increase of discharge times,the C2 involved in the formation of discharge plasma channel decreases.The research results can provide references for material selection and design of high voltage vacuum solid insulation parts.

关 键 词：光敏树脂 真空闪络 连续放电 威布尔分布 发射光谱 

分 类 号：TQ324.8[化学工程—合成树脂塑料工业]