中国物理B ›› 2023, Vol. 32 ›› Issue (4): 45202-045202.doi: 10.1088/1674-1056/ac9360
Zhilei Xu(许之磊)1, Guoqiang Gao(高国强)1,†, Pengyu Qian(钱鹏宇)1, Song Xiao(肖嵩)1, Wenfu Wei(魏文赋)1, Zefeng Yang(杨泽锋)1,2, Keliang Dong(董克亮)1, Yaguang Ma(马亚光)1, and Guangning Wu(吴广宁)1
Zhilei Xu(许之磊)1, Guoqiang Gao(高国强)1,†, Pengyu Qian(钱鹏宇)1, Song Xiao(肖嵩)1, Wenfu Wei(魏文赋)1, Zefeng Yang(杨泽锋)1,2, Keliang Dong(董克亮)1, Yaguang Ma(马亚光)1, and Guangning Wu(吴广宁)1
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.
中图分类号: (Arcs; sparks; lightning; atmospheric electricity)