电极表面粗糙程度对环保型绝缘气体C6F12O/CO2工频击穿电压的影响  

Effect of Surface Roughness of Electrode on Power Frequency Breakdown Voltage of Environmental Protection Insulation Gas C6F12O/CO2

作　　者：唐炬[1] 邹几欢 唐博文 雷志城 高克利 曾福平[1] TANG Ju;ZOU Jihuan;TANG Bowen;LEI Zhicheng;GAO Keli;ZENG Fuping(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]武汉大学电气与自动化学院,武汉430072 [2]中国电力科学研究院有限公司,北京100192

出　　处：《高电压技术》2019年第12期3769-3776,共8页High Voltage Engineering

基　　金：国家自然科学基金(51877157;51607127)~~

摘　　要：由于电力工业排放SF6的温室效应已不容忽视,环保型绝缘气体C6F12O在中低压开关柜中具有替代SF6的潜力。为了探索设备内金属导体表面粗糙程度对C6F12O/CO2气体工频击穿电压的影响规律,通过实验对比研究不同气压、不同体积分数的C6F12O/CO2与SF6和CO2在不同电极表面粗糙程度时的工频击穿特性,以探究C6F12O/CO2混合气体绝缘特性对金属表面粗糙程度和气压的协同敏感度。结果表明:C6F12O/CO2混合气体的绝缘强度与金属电极表面粗糙程度关系较大,但相比于SF6,其对金属电极表面粗糙程度的敏感度更小;金属电极表面粗糙程度对C6F12O/CO2混合气体工频击穿电压的影响随着气压的增大而不断增强。The greenhouse effect of SF6 emission from power industry can not be neglected,thus,an environmentally friendly insulating gas C6F12O has potentials to replace SF6 in cubic type gas insulated switchgears.In order to explore the influence of surface roughness of metal conductor on power frequency breakdown voltage of CEF12O/CO2 gas in equip-ment,the power frequency breakdown characteristics of C6F12O/CO2,SF6 and CO2 gas with different volume fractions under different pressures and different surface roughness of electrode were experimentally studied so as to explore the synergistic sensitivity of insulation characteristics of C6F12O/CO2 mixture to metal surface roughness and air pressure.The results show that the insulation strength of C6F12O/CO2 gas mixture has a great relationship with the roughness of metal electrode surface,but it is less sensitive to the roughness of metal electrode surface than SF6.The influence of sur-face roughness of metal electrode on power frequency breakdown voltage of C6F12O/CO2 gas mixture will increase with the increase of air pressure.

关 键 词：C6F12O/CO2混合气体 电极表面粗糙程度 击穿强度 气压 体积分数 

分 类 号：TM5[电气工程—电器]