真空断路器铜铬金属蒸气等离子体非局部热力学平衡态物性参数分析  

Analysis of Physical Properties Parameters of CuCr Metal Vapor Plasma under Non-Local Thermodynamic Equilibrium State for Vacuum Circuit Breaker

作　　者：杨赫 徐晶 柯贤杨 岳洋 郑悦[2] 史红菲 郑佳圆 刘晓明 YANG He;XU Jing;KE Xianyang;YUE Yang;ZHENG Yue;SHI Hongfei;ZHENG Jiayuan;LIU Xiaoming(Economic Technology Research Institute,State Grid Tianjin Electric Power Company,Tianjin 300160,China;State Grid Tianjin Electric Power Company,Tianjin 300160,China;State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,School of Electrical Engineering,Tianjin 300401,China)

机构地区：[1]国网天津市电力公司经济技术研究院,天津300160 [2]国网天津市电力公司,天津300160 [3]省部共建电工装备可靠性与智能化国家重点实验室、河北工业大学电气工程学院,天津300401

出　　处：《真空科学与技术学报》2024年第11期955-961,共7页Chinese Journal of Vacuum Science and Technology

基　　金：国网天津市电力公司科技项目(No.KJ22-1-41)。

摘　　要：真空断路器在大电流故障开断过程中,以真空为介质条件的灭弧系统内所产生的金属蒸气电弧等离子体组氛与电极材料特性密切相关。为了研究开断过程中金属蒸气等离子体物性参数的变化,以真空断路器CuCr25~CuCr75触头电极材料为研究对象,建立非局部热力学平衡模型,研究铜铬合金不同配比下金属蒸气等离子体粒子组氛分布。采用统计热力学方法求得等离子体热力学参数,分析不同合金配比下比焓和比定压热容分布;利用Chapman-Enskog法计算等离子体输运参数,探究铜铬合金材料配比对电导率的影响。In the large current-breaking process of the DC vacuum circuit breaker,the metal vapor arc plasma generated in the vacuum interrupter is closely related to the material properties of the contact electrode.In order to study the variation of metal vapor plasma physical properties parameters in the process of breaking,the non-local thermodynamic equilibrium model of vacuum arc plasma was established to obtain the composition distribution of particles of metal vapor plasma of CuCr25~CuCr75 contact.Moreover,using the statistical thermodynamic method,the thermodynamic parameters of metal vapor plasma were calculated,and the distribution of specific enthalpy and isobaric specific heat capacity with different alloy ratios were illustrated.Furthermore,the Chapman-Enskog method was used to calculate the transport parameters to investigate the effect of alloy ratio on the conductivity.

关 键 词：真空断路器 铜铬触头 电导率 

分 类 号：TM561[电气工程—电器]