基于电子输运参数的CF3I及CF3I-N2混合气体绝缘性能分析  

Analysis of the Insulation Properties of CF_3I and CF_3I-N_2 Gas Mixtures from Electron Transport Parameters

作　　者：邓云坤 马仪[3] 赵谡 肖登明[2] 张洪霞[4] Deng Yunkun;Ma Yi;Zhao Su;Xiao Dengming(Postdoctoral Workstation of Yunnan Power Grid Corporation,Kunming 650217,China;Department of Electrical Engineering Shanghai Jiao Tong University,Shanghai 200030,China;Yunnan Electric Power Grid Research Institute,Kunming 650217,China)

机构地区：[1]云南电网有限责任公司博士后工作站,昆明650217 [2]上海交通大学电气工程系,上海200030 [3]云南电网有限责任公司电力科学研究院,昆明650217 [4]不详

出　　处：《电工技术学报》2018年第7期1641-1651,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重点项目(51337006)、中国博士后科学基金(2016M602728)和南方电网公司科技项目(YNKJXM20160081)资助。

摘　　要：三氟碘甲烷(CF3I)因其优异的电气和物化性能被认为是最有可能替代六氟化硫(SF_6)的气体之一。采用玻耳兹曼方程计算纯CF3I及CF3I-N2混合气体的电子输运参数,分析这些参数随约化电场强度E/N和CF3I混合比例的变化规律,从微观角度研究CF3I及CF3I-N2混合气体的绝缘性能。结果表明,纯CF3I气体在均匀场中的绝缘强度约为SF_6的1.19倍;且当CF3I所占比例达到70%时,CF3I-N2混合气体能够达到与纯SF_6相当的绝缘性能。此外,CF3I混合气体在电场敏感性方面优于SF_6,但协同效应不如SF_6-N2混合气体显著。Trifluoroiodomethane(CF3I)has been broadly proposed as a potential replacement for sulfur hexafluoride(SF6)owing to its outstanding dielectric strength and physico-chemical properties.This paper aimed to adopt the Boltzmann equation method to calculate the electron transport coefficients of CF3I and its gas mixture with N2,and comprehensively investigate the insulation properties of CF3I gas mixtures from the point view of micro-parameters.The calculation results indicate that the insulation strength of pure CF3I is 1.19 times greater than that of SF6.It is also found that CF3I-N2 gas mixture with 70%CF3I presents a very similar dielectric strength to that of SF6.In addition,CF3I gas mixtures have advantages on the electric field sensitivity compared with SF6,however,disadvantages on the synergistic effect.

关 键 词：玻耳兹曼方程 电子输运参数 CF3I混合气体 SF6替代气体 

分 类 号：TM213[一般工业技术—材料科学与工程]