不均匀电场下CF_(3)SO_(2)F混合气体的工频击穿特性  

Power frequency breakdown characteristics of CF_(3)SO_(2)F mixtures under non-uniform electric field

作　　者：胡世卓 周文俊[2] 罗赟[1] 黄宇婧 邱睿 HU Shizhuo;ZHOU Wenjun;LUO Yun;HUANG Yujing;QIU Rui(School of Intelligent Manufacturing,Nanning College for Vocational Technology,Nanning 530008,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]南宁职业技术学院智能制造学院,广西南宁530008 [2]武汉大学电气与自动化学院,湖北武汉430072

出　　处：《绝缘材料》2023年第12期128-135,共8页Insulating Materials

基　　金：国家自然科学基金联合基金资助项目(U1966211);广西高校中青年教师科研基础能力提升项目(2023KY1049)。

摘　　要：在球-球和尖-板电极下测量了新型环保绝缘混合气体CF_(3)SO_(2)F/N_(2)和CF_(3)SO_(2)F/CO_(2)的工频击穿电压,分析了气压、电极间距和电场不均匀度等因素对混合气体工频击穿特性的影响,并与SF_(6)进行了对比。结果表明:稍不均匀电场下CF_(3)SO_(2)F混合气体的工频击穿电压与气压为正向线性关系,随间距增长击穿电压出现微弱的饱和趋势。极不均匀电场下CF_(3)SO_(2)F混合气体的工频击穿电压随气压变化呈现“上升-下降-上升”的“驼峰”曲线,“驼峰”峰值对应的气压值在0.2~0.35 MPa之间。其中CF_(3)SO_(2)F/N_(2)混合气体的工频击穿电压整体大于CF_(3)SO_(2)F/CO_(2)混合气体。在0.3 MPa及以上,CF_(3)SO_(2)F/N_(2)混合气体在极不均匀电场下仍可保持较高的相对SF_(6)绝缘水平,具备良好的应用潜力。The power frequency breakdown voltages of a new eco-friendly insulation CF_(3)SO_(2)F/N_(2) and CF_(3)SO_(2)F/CO_(2) mixtures were measured under sphere-sphere and needle-plate electrodes.The effects of pressure,electrode spacing,and electric field non-uniformity on the power frequency breakdown characteristics of the CF_3SO_(2F) mixtures were analyzed and compared with SF_(6).The results show that under slightly non-uniform electric field,the power frequency breakdown voltage of CF_(3)SO_(2)F mixtures is linearly related to pressure,and the breakdown voltage show weak saturation trend with the increase of electrode spacing.Under extremely non-uniform electric field,the power frequency breakdown voltages of CF_(3)SO_(2)F mixtures exhibits"hump"curves of"rising-falling-rising"as the pressure increases,and the corresponding pressure of"hump"peak is between 0.2 MPa and 0.35 MPa.The overall power frequency breakdown strength of the CF_(3)SO_(2)F/N_(2) mixture is greater than that of the CF_(3)SO_(2)F/CO_(2) mixture.At 0.3 MPa and above,CF_(3)SO_(2)F/N_(2) mixtures can maintain a highly insulation level relative to SF_(6) under extremely non-uniform electric fields,which has good application potential.

关 键 词：CF_(3)SO_(2)F混合气体 不均匀电场 击穿特性 “驼峰”现象 

分 类 号：TM213[一般工业技术—材料科学与工程]