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Investigation on insulation properties of HFO-1336mzz(E)and N_(2)/CO_(2)mixtures as SF_(6) substitutes in gas-insulated electrical applications

查看全文 作　　者：Zhanyang [1]Gao;Yunbai [1]Luo;Ruichao [1]Peng;Xiaoxiao [1]Wang;Ping [1]Yu;Wenjun [2]Zhou 高影响力作者 机构地区：[1]Engineering Research Center of Organosilicon Compounds&Materials,Ministry of Education,College of Chemistry and Molecular Sciences,Wuhan University,Wuhan,China;[2]School of Electrical Engineering and Automation,Wuhan University,Wuhan,China高影响力机构 出　　处：《High Voltage》索引2023年第8卷第1期,共11页高影响力期刊 基　　金：National Key R&D Program of China,Grant/Award Numbers:2017YFB0902500,2021YFB2401400;Science and Technology Project of State Grid。 摘　　要：The emissions of SF6 have been restricted owing to 3400 years of atmospheric lifetime and high global warming potential(GWP)as an insulating gas in gas-insulated electrical equipment.In this study,HFO-1336mzz(E)and N_(2)/CO_(2)mixtures are proposed as SF6 substitutes for their short atmospheric lifetime,low GWP and superior insulation performance.The GWP of HFO-1336mzz(E)is only 18 and its atmospheric lifetime is days to weeks.The breakdown voltage of 25%HFO-1336mzz(E)and N_(2)/CO_(2)mixtures is about 85%that of pure SF6 under alternating current.The self-recovery ability of HFO-1336mzz(E)and CO_(2)mixtures is superior to that of HFO-1336mzz(E)and N_(2)mixtures.The decomposition characteristic of HFO-1336mzz(E)shows that a tiny amount of its gas might initiate a carbonisation reaction to form carbon after multiple breakdown tests,which is verified by observations using energy dispersive X-rays spectroscopy and scanning electron microscope.The acute toxicity test of HFO-1336mzz(E)indicates that the gas is non-toxic.The results show that HFO-1336mzz(E)and N_(2)/CO_(2)mixtures are potential substitutes for SF6 in electrical applications. 关 键 词：SF6 ELECTRICAL INSULATION
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