C_(4)F_(7)N二元混合气体电弧温度特性研究  

Research on Arc Temperature Characteristics of C_(4)F_(7)N Binary Gas Mixture

作　　者：边晨曦 何柏娜[1] 姜仁卓 张婧茹 贺兴民 董彦辰 刘雨佳 娄辉 BIAN Chenxi;HE Baina;JIANG Renzhuo;ZHANG Jingru;HE Xingmin;DONG Yanchen;LIU Yujia;LOU Hui(College of Electric and Electronic Engineering,Shandong University of Technology,Shandong Zibo 255000,China;State Grid Longkou Power Supply Company of Shandong Power Corporation,Shandong Yantai 264000,China)

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255000 [2]国网山东省电力公司龙口市供电公司,山东烟台264000

出　　处：《高压电器》2024年第9期53-60,共8页High Voltage Apparatus

基　　金：国家自然科学基金资助项目(51777130);山东省研究生教育质量提升计划项目(SDYKC19103);山东省自然科学基金资助项目(ZR2021ME057)。

摘　　要：为实现“2030年碳达峰,2060年碳中和”的减排目标,推进电力行业绿色发展,开发环保型绝缘气体以减少SF_(6)使用已成为研究热点。环保型绝缘气体C_(4)F_(7)N凭借优良的绝缘和环保性能被广泛关注。文中基于磁流体力学方程搭建二维轴对称喷口电弧模型,通过数值计算对比研究C_(4)F_(7)N/CO_(2)与C_(4)F_(7)N/N_(2)二元混合气体、SF_(6)、CO_(2)4种气体介质电流过零前后电弧温度特性,分析4种介质灭弧性能差异原因。研究表明,与CO_(2)气体相比,C_(4)F_(7)N二元混合气体电弧径向温度分布及弧芯温度冷却速度更接近SF_(6)气体,灭弧性能介于SF_(6)与CO_(2)之间;电弧辐射吸收区的能量堆积造成C_(4)F_(7)N二元混合气体与SF_(6)气体之间灭弧性能差异。综合考虑气体传热能力与电弧散热速度,C_(4)F_(7)N二元混合气体具有较高替代潜力。In order to achieve the emission reduction target of‘carbon peak in 2030 and carbon neutral by 2060’,as well as promote the green development of the power industry,it has become a research hotspot to develop environmently friendly insulating gas to reduce the use of SF_(6).The environmentally friendly insulating gas C_(4)F_(7)N has been widely concerned with its excellent insulation and environmental performance.In the paper,a two-dimensional axisymmetric nozzle arc model is built based on the MHD equation,and the arc temperature characteristics of the four gas mediums C_(4)F_(7)N/CO_(2) and C_(4)F_(7)N/N_(2),SF_(6) and CO_(2) are compared through numerical calculations before and after current zero crossing.The reasons for the difference in arc extinguishing performance of the four media are analyzed.Research shows that,compared with CO_(2)gas,the radial temperature distribution of C_(4)F_(7)N binary mixed gas arc and the cooling rate of arc core temperature are closer to SF_(6)gas,and the arc extinguishing performance is between SF_(6) and CO_(2).The accumulation of energy in the arc radiation absorption zone results in the difference in arc extinguishing performance between C_(4)F_(7)N binary mixture and SF_(6)gas.Considering the heat transfer capacity of the gas and the heat dissipation speed of the arc,the C_(4)F_(7)N binary gas mixture has a higher potential for substitution.

关 键 词：环保型绝缘气体 多物理场耦合 喷口电弧模型 温度特性 灭弧机理 

分 类 号：TM501.2[电气工程—电器] TM213[一般工业技术—材料科学与工程]