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

doi:10.1088/1674-1056/ac9360

中国物理B ›› 2023, Vol. 32 ›› Issue (4): 45202-045202.doi: 10.1088/1674-1056/ac9360

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

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

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

收稿日期:2022-07-06 修回日期:2022-09-07 接受日期:2022-09-21 出版日期:2023-03-10 发布日期:2023-03-17
通讯作者: Guoqiang Gao E-mail:xnjdggq@163.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51707166, 51922090, U1966602, and U19A20105), and the Sichuan Science and Technology General Project (Grant Nos. 2019YJ0213 and 2019JDJQ0019).

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

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

Received:2022-07-06 Revised:2022-09-07 Accepted:2022-09-21 Online:2023-03-10 Published:2023-03-17
Contact: Guoqiang Gao E-mail:xnjdggq@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51707166, 51922090, U1966602, and U19A20105), and the Sichuan Science and Technology General Project (Grant Nos. 2019YJ0213 and 2019JDJQ0019).

摘要/Abstract

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

Abstract: 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.

Key words: pantograph-catenary arc, low pressure, multi-field stress coupling model, arc column drift

中图分类号: (Arcs; sparks; lightning; atmospheric electricity)

52.80.Mg

52.77.Fv (High-pressure, high-current plasmas)

Zhilei Xu(许之磊), Guoqiang Gao(高国强), Pengyu Qian(钱鹏宇), Song Xiao(肖嵩), Wenfu Wei(魏文赋), Zefeng Yang(杨泽锋), Keliang Dong(董克亮), Yaguang Ma(马亚光), and Guangning Wu(吴广宁). Drift characteristics and the multi-field coupling stress mechanism of the pantograph-catenary arc under low air pressure[J]. 中国物理B, 2023, 32(4): 45202-045202.

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

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

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