低气压低氧环境流注放电机理研究  

Study on the Mechanism of Flow Injection Discharge Under I ow-Pressure and I ow-Oxygen Environment

作　　者：邹丹旦 宋子浔 潘建兵 Zou Dandan;Song Zixun;Pan Jianbing(School of Electrical and Automation Engineering,East China Jiaotong University,Nanchang 330013,China;Electric Power Research Institute of State Grid Jiangxi Electric Power Company,Nanchang 330096,China)

机构地区：[1]华东交通大学电气与自动化工程学院,江西南昌330013 [2]国家电网江西省电力有限公司电力科学研究院,江西南昌330096

出　　处：《华东交通大学学报》2024年第5期74-83,共10页Journal of East China Jiaotong University

基　　金：国家自然科学基金项目(52467016);江西省自然科学基金项目(20232BAB204061,20242BAB23043)。

摘　　要：【目的】针对高海拔低气压低氧环境下电气设备空气间隙绝缘性能显著下降问题,对不同气压和氧含量下的流注传播特性展开研究。【方法】将流体模型与等离子体化学反应相结合,搭建了棒-板电极结构、高海拔低气压低氧空气流注放电仿真模型,分别对不同气压和氧含量下的空气流注传播过程进行仿真,分析气压和氧含量对流注传播速度、电子密度、流注通道半径、电场强度分布变化的影响。【结果】结果表明随着气压降低,流注传播速度不断加快,流注头部及通道电子密度和电场强度呈下降趋势,流注通道半径整体上有所增大;随着氧含量的降低,流注传播速度显著减小,电子密度不断增大,电场强度整体上增大,流注通道半径减小。【结论】气压和氧含量因素均对流注放电特性和等离子体反应机理产生重要影响,在实际工程设计中应予以综合考虑。【Objective】Aiming at the significant degradation of air gap insulation performance of electrical equipment under high-altitude,low-pressure and low-oxygen environments,a study was carried out to character‐ize the flow propagation under different air pressures and oxygen contents.【Method】By combining the fluid model with the plasma chemical reaction,a rod-plate electrode structure and a high-altitude low-pressure low-oxygen air injection discharge simulation model were constructed to simulate the air injection propagation pro‐cess under different air pressures and oxygen contents,and to analyze the effects of air pressure and oxygen con‐tent on the injection propagation speed,electron density,injection channel radius and electric field intensity dis‐tribution.It analyzed the effects of air pressure and oxygen content on the propagation speed,electron density,channel radius and electric field distribution.【Result】The results show that,with the reduction of air pressure,the flow injection propagation speed is accelerating,the flow injection head and channel electron density and electric field strength is decreasing trend,the flow injection channel radius on the whole increased;with the re‐duction of the oxygen content,the flow injection propagation speed is decreasing significantly,the electron densi‐ty is increasing,while the electric field strength on the whole increases,and the radius of the flow injection chan‐nel is decreasing.【Conclusion】The factors of gas pressure and oxygen content have an important influence on the flow injection discharge characteristics and plasma reaction mechanism,which should be considered compre‐hensively in the actual engineering design.

关 键 词：气压 氧含量 流注放电 等离子体 

分 类 号：TM711[电气工程—电力系统及自动化]