基于Boltzmann方程的CF<sub>3</sub>I混合气体协同效应分析

doi:10.19595/j.cnki.1000-6753.tces.180373

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摘要 CF₃I是一种极具潜力的SF₆替代气体,为了研究CF₃I在不同缓冲气体中的绝缘特性和协同效应,通过求解两项近似Boltzmann方程,对不同混合比例CF₃I/N₂和CF₃I/CO₂混合气体的协同效应系数进行了计算分析,并与试验结果进行对比。计算结果表明,300 K时CF₃I的绝缘强度是SF₆气体的1.2倍,CF₃I/N₂和CF₃I/CO₂混合气体都出现了协同效应现象,CF₃I/CO₂混合气体的协同效应系数显著高于CF₃I/N₂混合气体,但CF₃I/N₂混合气体的绝缘强度高于相同条件下的CF₃I/CO₂混合气体。当CF₃I含量超过20%时,CF₃I/N₂及CF₃I/CO₂混合气体的绝缘强度随CF₃I含量变化基本呈线性变化。试验结果显示,CF₃I/N₂混合气体的击穿电压同样高于CF₃I/CO₂混合气体,但两种混合气体的协同效应系数基本相同。

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	赵谡
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关键词 ： Boltzmann方程, 临界击穿, CF₃I, 混合气体, 协同效应

Abstract：CF₃I is a promising alternative for SF₆ gas. In this paper, two-term approximate Boltzmann equations were used to obtain the synergistic coefficient and compared with experimental results. The calculation results show that the insulation strength of CF₃I gas at 300 K is 1.2 times that of SF₆ gas and the synergistic effect was observed both in CF₃I/N₂ and CF₃I/CO₂ gas mixtures. The synergistic coefficient of CF₃I/CO₂ gas mixture was higher than that of CF₃I/N₂. When the content of CF₃I exceeds 20%, the insulation strength of CF₃I/N₂ and CF₃I/CO₂ gas mixture increases linearly with the increasing CF₃I gas content. The experimental results show that the breakdown voltage of CF₃I/N₂ gas mixture is higher than that of CF₃I/CO₂ gas mixture, but the synergistic coefficients of the two gas mixtures are basically the same.

Key words： Boltzmann equation critical breakdown CF₃I gas mixtures synergistic effect

收稿日期: 2018-04-14 出版日期: 2019-04-17

PACS:

TM85

基金资助:国家自然科学基金（51337006）和中国博士后科学基金（2016M606768）资助项目

通讯作者: 肖登明男,1953年生,教授,博士生导师,研究方向为气体绝缘与气体放电。E-mail：dmxiao@sjtu.edu.cn

作者简介: 赵谡男,1991年生,博士研究生,研究方向为气体绝缘与SF<sub>6</sub>替代气体。E-mail：zhaosu@sjtu.edu.cn

引用本文:

赵谡, 邓云坤, 钟蕊霜, 肖登明. 基于Boltzmann方程的CF₃I混合气体协同效应分析[J]. 电工技术学报, 2019, 34(7): 1553-1558. Zhao Su, Deng Yunkun, Zhong Ruishuang, Xiao Dengming. Investigation on the Synergistic Effect of CF₃I Gas Mixtures Using Boltzmann Equation. Transactions of China Electrotechnical Society, 2019, 34(7): 1553-1558.

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