首页|CF3SO2F/N2混合气体的电离特性试验研究

CF3SO2F/N2混合气体的电离特性试验研究

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为评估 CF3SO2F/N2 混合气体的绝缘性能,研究了其在电场中的电离特性.通过稳态汤逊实验(SST)测量获得了CF3SO2F摩尔分数分别为 10%、20%、30%、40%、100%的CF3SO2F/N2 混合气体的有效电离系数和临界约化场强,研究了混合比例、约化场强和电极距离对其电离特性的影响,并比较了 CF3SO2F/N2 混合气体相对于SF6的绝缘强度.结果表明:CF3SO2F摩尔分数为10%时,CF3SO2F/N2混合气体的电离特性与N2类似;随着CF3SO2F占比增大至20%以上后,CF3SO2F/N2混合气体的电离特性逐步由CF3SO2F主导;CF3SO2F/N2混合气体相对于SF6的理论绝缘强度随着CF3SO2F摩尔分数的增大而增大,40%CF3SO2F/60%N2混合气体的临界约化场强约为SF6的1.01倍,但其对电场变化的敏感程度不如SF6.研究结果可为CF3SO2F/N2混合气体的绝缘强度评估提供理论基础.
Experimental Study on the Ionization Characteristics of CF3SO2F/N2 Gas Mixtures
In order to evaluate the insulation properties of CF3SO2F/N2 mixtures,their ionization characteristics in the electric field were studied.The effective ionization coefficient and critical reduction field strength of CF3SO2F/N2 mixture were obtained by steady-state Townsend experiment(SST),and the effects of mixing ratio,reduction field strength,and electrode distance on their ionization characteristics were studied.The insulation strength of CF3SO2F/N2 gas mixtures relative to SF6 was compared.The results show that the ionization characteristics of CF3SO2F/N2 gas mixtures are similar to those of N2 when the molar fraction of CF3SO2F is 10%.As the proportion of CF3SO2F increases to more than 20%,the ionization characteristics of CF3SO2F/N2 gas mixtures are gradually dominated by CF3SO2F.The theoretical dielectric strength of CF3SO2F/N2 gas mixtures relative to SF6 increases with the increase of CF3SO2F molar fraction,and the criti-cal reduced field strength of 40%CF3SO2F/60%N2 gas mixtures is about 1.01 times that of SF6,however,its sensitivity to electric field changes is not as good as that of SF6.The results can provide a theoretical basis for the evaluation of the dielectric strength of CF3SO2F/N2 gas mixtures.

CF3SO2F/N2 gas mixturessubstitute gas to SF6steady-state Townsend methodreduced critical electrical fieldeffective ionization coefficient

向志辉、郑宇、任书波、周文俊、朱太云

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电网环境保护全国重点实验室(武汉大学),武汉 430072

武汉大学电气与自动化学院,武汉 430072

国网安徽省电力有限公司电力科学研究院,合肥 230022

CF3SO2F/N2混合气体 SF6替代气体 稳态汤逊实验 临界约化场强 有效电离系数

国家重点研发计划国家电网科技项目

2021YFB2401400SGAHDK00LFJS2200332

2024

10.13336/j.1003-6520.hve.20230271

高电压技术
中国电力科学研究院　中国电机工程学会

高电压技术

CSTPCD北大核心
影响因子：2.32
ISSN：1003-6520
年,卷(期)：2024.50(3)
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