Influence of the gassing materials on the dielectric properties of air  

作　　者：张含天 厉天威 罗兵 吴翊 杨飞 孙昊 唐力 

机构地区：[1]State Key Laboratory of Electrical Insulation and Power Equipment,Xi'an Jiaotong University [2]State Key Laboratory of HVDC,Electric Power Research Institute,China Southern Power Grid

出　　处：《Plasma Science and Technology》2017年第5期68-73,共6页等离子体科学和技术（英文版）

基　　金：supported by the National Key Basic Research Program of China(973 Program)2015CB251002;National Natural Science Foundation of China under Grant 51521065,51577145;the Fundamental Research Funds for the Central Universities;Shaanxi Province Natural Science Foundation 2013JM-7010

摘　　要：Influence of the gassing materials, such as PA6, PMMA, and POM on the dielectric properties of air are investigated. In this work, the fundamental electron collision cross section data were carefully selected and validated. Then the species compositions of the air–organic vapor mixtures were calculated based on the Gibbs free energy minimization. Finally, the Townsend ionization coefficient, the Townsend electron attachment coefficient and the critical reduced electric field strength were derived from the calculated electron energy distribution function by solving the Boltzmann transport equation. The calculation results indicated that H;O with large attachment cross sections has a great impact on the critical reduced electric field strength of the air–organic vapor mixtures. On the other hand, the vaporization of gassing materials can help to increase the dielectric properties of air circuit breakers to some degree.Influence of the gassing materials, such as PA6, PMMA, and POM on the dielectric properties of air are investigated. In this work, the fundamental electron collision cross section data were carefully selected and validated. Then the species compositions of the air–organic vapor mixtures were calculated based on the Gibbs free energy minimization. Finally, the Townsend ionization coefficient, the Townsend electron attachment coefficient and the critical reduced electric field strength were derived from the calculated electron energy distribution function by solving the Boltzmann transport equation. The calculation results indicated that H_2O with large attachment cross sections has a great impact on the critical reduced electric field strength of the air–organic vapor mixtures. On the other hand, the vaporization of gassing materials can help to increase the dielectric properties of air circuit breakers to some degree.

关 键 词：air circuit breaker gassing materials Boltzmann equation analysis dielectric properties EEDF critical reduced electric field strength electron collision cross section 

分 类 号：TM561.1[电气工程—电器]