CF_3I/CF_4混合气体在极不均匀电场中的工频击穿特性  

AC Breakdown Characteristics of CF_3I/CF_4 Gas Mixtures in Condition of Extremely Non-uniform Electric Field

作　　者：倪兆瑞 张洲铭 肖登明[1] 谭燕 NI Zhaorui;ZHANG Zhouming;XIAO Dengming;TAN Yan(Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China;Shanghai Tianling Switchgear Co., Ltd., Shanghai 201808, China)

机构地区：[1]上海交通大学电气工程系,上海200030 [2]上海天灵开关有限公司,上海201808

出　　处：《高压电器》2018年第7期153-156,共4页High Voltage Apparatus

基　　金：国家自然科学基金(51337006)~~

摘　　要：为了寻找SF_6的替代气体,文中对极不均匀电场中的10%~30%CF_3I/CF_4混合气体在不同极间距(5~35 mm)和不同气压(0.1~0.3 MPa)下的工频击穿特性进行了实验研究。结果发现,CF_3I/CF_4混合气体的工频击穿电压随着极间距的增大而近似线性增大,但是其随气压升高和CF_3I体积分数的升高均表现出"驼峰"现象。与SF_6相比,CF_3I/CF_4混合气体的工频耐压水平在它的59%~120%之间。综合考虑,15%~20%CF_3I/CF_4混合气体可以作为SF_6替代气体在合适的电气设备中使用。In order to look for SF6 alternatives, this paper has experimentally researched AC breakdown characteristics of 10%-30%CF3I/CF4 gas mixtures with different electrode gap distances （5-35 mm） and different gas pressures （0.1-0.3 MPa） in condition of extremely non-uniform electric field. The results show that AC breakdown voltage of CF3I/CF4 gas mixtures nearly linearly increases as electrode gap distance increases, but the voltage performs the well- known N shapeas the gas pressures and the ratio of CF3I increase. Compared with SF6, power frequency withstand voltage of CF3I/CF4 gas mixtures is between 59%- 120% of that of SF6. Taking every factor of account, 15%-20% CF3I/ CF4 gas mixtures can be regarded as SF6 alternatives to be applied in some proper electrical apparatus.

关 键 词：SF6替代气体 CF3I/CF4混合气体 极不均匀电场 工频击穿特性 

分 类 号：TM213[一般工业技术—材料科学与工程]