高压电器2024，Vol.60Issue(4)：10-16,23,8.DOI:10.13296/j.1001-1609.hva.2024.04.002
热态C5F10O/CO2混合气体电击穿特性研究
Study on Dielectric Breakdown Properties of Hot C5F10O/CO2 Gas Mixture
摘要
Abstract
The critical breakdown electric field strength of hot gas is the basic data to assess the post-arc electrical breakdown characteristics of high-voltage circuit breakers.In this paper,the critical electric field strength of C5F10O/CO2 gas mixture in the range of C5F10O mixing ratio k=0-10%and intensity of pressure at 0.1-2.0 MPa and at 300-4 000 K is studied.Based on the mathematical model of the law of mass action,the equilibrium components of the gas mixture at different temperatures are obtained.The Boltzmann equation is solved by two-term approximation method.The electron energy distribution function,equivalent ionization and adsorption coefficient of the gas mix-ture are analyzed so to obtain the critical reduced electric field strength and critical electric field strength of the gas mixture.The results show that at 0.6 MPa,when the temperature is lower than 3 000 K,the critical electric field strength of the gas mixture with k=0-10%is gradually lower than that of SF6 with the decrease of temperature.However,in case of the temperature above 3 000 K,the critical electric field strength of the gas mixture is more than 1.2 times that of SF6,which has strong insulation ability.The research results can provide a reference for the study of post-arc dielectric breakdown properties of high voltage circuit breakers filled with C5F10O/CO2 gas mixture.关键词
C5F10O/CO2混合气体/SF6替代气体/电击穿特性/临界击穿场强/粒子组分/玻尔兹曼方程Key words
C5F10O/CO2 gas mixture/SF6 alternative gas/electrical breakdown characteristics/critical electric field strength/particle component/Boltzmann equation引用本文复制引用
崔兆轩,林莘,徐建源,李磊..热态C5F10O/CO2混合气体电击穿特性研究[J].高压电器,2024,60(4):10-16,23,8.基金项目
国家自然科学基金资助项目(51777130). Project Supported by National Natural Science Foundation of China(51777130). （51777130）
