CF_(3)SO_(2)F/N_(2)混合气体中柱式环氧树脂绝缘子沿面闪络特性  

Surface Flashover Characteristics of Cylindrical Epoxy Resin Insulators in CF_(3)SO_(2)F/N_(2) Mixture

作　　者：苑伟光 高克利 任书波 郑宇 章程[1,2] YUAN Weiguang;GAO Kei;REN Shubo;ZHENG Yu;ZHANG Cheng(Beijing International S&T Cooperation Base for Plasma Science and Energy Conversion,Institute of Electrical Engineering,Chi-nese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;China Electric Power Research Institute,Beijing 100192,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]中国科学院电工研究所等离子体科学和能源转化北京市国际科技合作基地,北京100190 [2]中国科学院大学,北京100049 [3]中国电力科学研究院有限公司,北京100192 [4]武汉大学电气与自动化学院,武汉430072

出　　处：《高电压技术》2024年第12期5388-5396,共9页High Voltage Engineering

基　　金：国家重点研发计划(2021YFB2401400)。

摘　　要：CF_(3)SO_(2)F/N_(2)混合气体是一种潜在的SF6替代气体,但其沿面闪络特性目前仍有待研究。该文结合三氟甲基磺酰氟(CF_(3)SO_(2)F)已有研究成果,综合考虑液化温度、运行工况、应用成本等多方面因素,主要研究CF_(3)SO_(2)F/N_(2)混合气体。通过搭建直流、工频、雷电冲击等不同电压形式下的沿面闪络实验平台,开展了均匀电场下混合气体中的沿面闪络特性研究,并与SF6进行了对比。通过研究发现:不同电压形式下的沿面闪络电压随气压升高而呈增长趋势。在直流电压下,0.8MPa下混合体积比为12%CF_(3)SO_(2)F/88%N_(2)的混合气体相对沿面绝缘强度为0.5MPa下SF6的90%以上;在工频交流电压和雷电冲击电压下,前者的相对沿面绝缘强度分别接近后者的70%和90%。此外,还对实验后样品表面形貌进行了对比分析,发现不同电压形式下,混合气体中实验后样品表面闪络痕迹的形状与颜色均存在差异,其中工频交流电压沿面闪络对样品表面的损伤最严重。该文结论可为CF_(3)SO_(2)F绝缘设备的绝缘设计提供参考。CF_(3)SO_(2)F/N_(2) mixture is a potential SF6 substitute gas,however,few researches on its surface flashover char-acteristics are available in the literature.In this paper,combined with the existing research results of CF_(3)SO_(2)F,the liquefaction temperature,operating conditions,application costs and other aspects were taken into account,and CF_(3)SO_(2)F/N_(2) mixture was studied.Consequently,an experimental platform for surface flashover under different voltage forms was established,including DC voltage,power frequency AC voltage,and lightning impulse voltage.The surface flashover characteristics of gas mixture under uniform electric field were studied and compared with SF6.It is found that the surface flashover voltage under different voltage forms increases with the rise of gas pressure.Under DC voltage,the 12%CF_(3)SO_(2)F/88%N_(2) mixture with surface flashover voltage of 0.8 MPa can reach more than 90%that of 0.5 MPa SF6.Moreover,under power frequency AC voltage and lightning impulse voltage,surface flashover voltage of the former can be close to 70%and 90%that of the later,respectively.Additionally,the surface morphology of the samples after surface flashover is compared and analyzed.It is found that the shape and color of the flashover traces on the sample surface are different in the gas mixture under different voltage forms,and the flashover along the power frequency AC voltage causes the most damage to the sample surface.The conclusions of this paper can provide references for insulation designs of CF_(3)SO_(2)F insulation equipment.

关 键 词：CF_(3)SO_(2)F/N_(2)混合气体 环氧树脂绝缘子 沿面闪络 SF6替代气体 均匀电场 雷电冲击 傅里叶变换红外光谱法 

分 类 号：TM216[一般工业技术—材料科学与工程]