Drift characteristics and the multi-field coupling stress mechanism of the pantograph-catenary arc under low air pressure  

作　　者：许之磊 高国强 钱鹏宇 肖嵩 魏文赋 杨泽锋 董克亮 马亚光 吴广宁 Zhilei Xu;Guoqiang Gao;Pengyu Qian;Song Xiao;Wenfu Wei;Zefeng Yang;Keliang Dong;Yaguang Ma;Guangning Wu(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China;Research and Development Department,Chengdu Guojia Electrical Engineering Co.Ltd,Chengdu 611756,China)

机构地区：[1]School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China [2]Research and Development Department,Chengdu Guojia Electrical Engineering Co.Ltd,Chengdu 611756,China

出　　处：《Chinese Physics B》2023年第4期493-503,共11页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.51707166,51922090,U1966602,and U19A20105);the Sichuan Science and Technology General Project(Grant Nos.2019YJ0213 and2019JDJQ0019)。

摘　　要：The fault caused by a pantograph-catenary arc is the main factor that threatens the stability of high-speed railway energy transmission.Pantograph-catenary arc vertical drift is more severe than the case under normal pressure,as it is easy to develop the rigid busbar,which may lead to the flashover occurring around the support insulators.We establish a pantograph-catenary arc experiment and diagnosis platform to simulate low pressure and strong airflow environment.Meanwhile,the variation law of arc drift height with time under different air pressures and airflow velocities is analyzed.Moreover,arc drift characteristics and influencing factors are explored.The physical process of the arc column drifting to the rigid busbar with the jumping mechanism of the arc root on the rigid busbar is summarized.In order to further explore the mechanism of the above physical process,a multi-field stress coupling model is built,as the multi-stress variation law of arc is quantitatively evaluated.The dynamic action mechanism of multi-field stress on arc drifting characteristics is explored,as the physical mechanism of arc drifting under low pressure is theoretically explained.The research results provide theoretical support for arc suppression in high-altitude areas.

关 键 词：pantograph-catenary arc low pressure multi-field stress coupling model arc column drift 

分 类 号：U225[交通运输工程—道路与铁道工程] U264.34[机械工程—车辆工程]