Comparative studies of C_(4)F_(7)N-based gas mixtures as the eco-friendly alternative to SF_(6)for interrupting applications  

作　　者：Wen Wang Xianglian Yan Hao Wang Keli Gao 

机构地区：[1]China Electric Power Research Institute,Beijing,China

出　　处：《High Voltage》2025年第1期228-242,共15页高电压(英文)

基　　金：Science and Technology Project of State Grid Corporation of China,Grant/Award Number:5500-202320105A-1-1-ZN。

摘　　要：To comprehensively evaluate the feasibility of using C_(4)F_(7)N-based gas mixture as arc extinguishing medium,a comparative study is performed on the variations of the multiphysical fields,gas flow environment and decomposition characteristics of the gas mixtures.A modified theoretical basis of the arc model developed for the C_(4)F_(7)N-based gas mixture is presented in the work with particular emphasis on the non-recombination features of C_(4)F_(7)N.This work also experimentally studies the electrical characteristics of the gas medium and the monitored parameters are also used to calibrate the arc model.The amount change of the seven dominant decomposing by-products is analysed as well.The results present that the C_(4)F_(7)N/CO_(2)/O_(2)ternary gas mixture exhibits a more promising interrupting performance.Increasing the O_(2)concentration from 5%to 10%has less effects on the arc characteristics,but it could suppress the formation of CO.The arc behaviour of C_(4)F_(7)N/CO_(2)/O_(2)gas mixture is also improved with increasing the velocity of the moving components.The findings provide important insights into the potential of C_(4)F_(7)N-based gas mixtures as one of the sustainable and effective solutions for high-voltage interrupting applications.

关 键 词：characteristics MIXTURE BEHAVIOUR 

分 类 号：TG1[金属学及工艺—金属学]