Abstract：The paper discussed the possibility of CF3I/N2 gas mixtures an alternative to SF6 used in gas-insulated equipment, from the point of the power frequency puncture voltage performance. The influence of gas pressure, mixing ratio and gap distance on power frequency puncture voltage of the CF3I/N2 gas mixtures was studied through power frequency puncture tests. The power frequency puncture voltage of the CF3I/N2 gas mixtures was comparatively analyzed with SF6/N2 gas mixtures. The paper proposed a quantitative analysis method using the C value to determine the type and strength of gas mixture synergism. The results show that power frequency puncture voltage performance of CF3I/N2 gas mixtures is gradually approaching to SF6 with the increase of the mixing ratio and gas pressure. CF3I/N2 gas mixtures in relative high pressure have higher application potential. The power frequency puncture voltages of CF3I/N2 gas mixtures presentpositive synergistic effect. Furthermore, CF3I gas has excellent insulating recovery property. Considering the power frequency puncture voltage performance, liquefaction temperature and environmental impacts, CF3I/N2 (The content of CF3I is 20%~50%) gas mixtures may replace SF6 gas for gas-insulated equipment in certain situations.
肖淞, 张晓星, 韩晔飞, 戴琦伟. 不均匀电场下CF3I/N2混合气体工频击穿特性试验[J]. 电工技术学报, 2016, 31(20): 228-236.
Xiao Song, Zhang Xiaoxing, Han Yefei, Dai Qiwei. Experiment on Power Frequency Puncture of CF3I/N2Gas Mixtures in Non-Uniform Electric Fields. Transactions of China Electrotechnical Society, 2016, 31(20): 228-236.
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