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Su ZHAO (赵谡), Yunkun DENG (邓云坤), Yuhao GAO (高于皓), Dengming XIAO (肖登明). Calculation and characteristic analysis on synergistic effect of CF3I gas mixtures[J]. Plasma Science and Technology, 2018, 20(6): 65401-065401. DOI: 10.1088/2058-6272/aaaadc
Citation: Su ZHAO (赵谡), Yunkun DENG (邓云坤), Yuhao GAO (高于皓), Dengming XIAO (肖登明). Calculation and characteristic analysis on synergistic effect of CF3I gas mixtures[J]. Plasma Science and Technology, 2018, 20(6): 65401-065401. DOI: 10.1088/2058-6272/aaaadc

Calculation and characteristic analysis on synergistic effect of CF3I gas mixtures

Funds: This work is supported by National Natural Science Founfidation of China (Grant No. 51337006), China Postdoctoral Science Foundation (2016M602728) and the Science and Technology Project of SGCC ‘Research on SF6 Alternative Gas for Insulation and Arc Quenching Application’.
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  • Received Date: November 21, 2017
  • CF3I is a potential SF6 alternative gas. In order to study the insulation properties and synergistic effects of CF3I/N2 and CF3I/CO2 gas mixtures, two-term approximate Boltzmann equations were used to obtain the ionization coefficient α, attachment coefficient η and the critical equivalent electrical field strength (E/N)cr. The results show that the (E/N)cr of CF3I gas at 300 K is 1.2 times that of SF6 gas, and CF3I/N2 and CF3I/CO2 gas mixtures both have synergistic effect occurred. The synergistic effect coefficient of CF3I/CO2 gas mixture was higher than that of CF3I/N2 gas mixture. But the (E/N)cr of CF3I/N2 is higher than that of CF3I/CO2 under the same conditions. When the content of CF3I exceeds 20%, the (E/N)cr of CF3I/N2 and CF3I/CO2 gas mixture increase linearly with the increasing of CF3I gas content. The breakdown voltage of CF3I/N2 gas mixture is also higher than that of CF3I/CO2 gas mixture in slightly non-uniform electrical field under power frequency voltage, but the synergistic effect coefficients of the two gas mixtures are basically the same.
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