Study on Arc Transferring Characteristics of Pantograph Passing Different Arc Horn Segmented Insulator

doi:10.16628/j.cnki.2095-8188.2020.03.003

Abstract

Abstract: When the pantograph passing through the segmented insulator,arc often generates,because of the thousands voltage at both ends of the segmented insulator,the arc will difficult to be extinguished,and the stagnation time is too long that will cause ablation damage to the insulator and affect the safe operation of the railway system.The transferring of arc in the segmented insulator and the evolution of the arc root have an important influence on the arc burning and extinguishing performance.Based on the magneto hydro dynamics (MHD) theory,a mathematical model of the arc of the pantograph passing the different arc horn segmented insulator was established.Through the analysis of the airflow field,electromagnetic force,temperature field and arc voltage,the main reason of the arc transferring is got.The study shows that with the arc horn increases,the arc transfer velocity first increases and then decreases.Besides the increasing of the angle makes the electrode gap smaller,which reduces the arc lengthen ability.Finally,the optimal solution of 60° arc horn is obtained.

Key words: segmented insulator, arc, arc root motion, arc evolution, temperature field

CLC Number:

TM501.2

CHEN Shaokun, JING Suoli, LIN Guanghua, LI Chengkun, DUAN Xuwei. Study on Arc Transferring Characteristics of Pantograph Passing Different Arc Horn Segmented Insulator[J]. DIANQI YU NENGXIAO GUANLI JISHU, 2020, 588(3): 14-22.

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