Characteristic analysis of the VCB operational overvoltage for high-speed trains considering arc reignition phenomenon

Xiao, Song; Hou, Hao; Jin, Yaoyao; Gao, Guoqiang; Guo, Yujun; Zhou, Jie; Ju, Changlei; Shen, Yixiang; Liu, Jie; Wu, Guangning

doi:10.1080/23248378.2022.2105268

Cited by 7 publications

(1 citation statement)

References 18 publications

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“…Emerging challenges in the operation of high-speed train EMU, such as a complex magnetic environment [1], have prompted studies on electromagnetic compatibility and its impact on onboard equipment [2]. Previous research [3] has focused on the distribution of magnetic flux density on velocity sensors of EMU. Furthermore, studies have examined sources of overvoltage affecting TB magnetic distribution, including vacuum circuit breaker (VCB) operation [4], traction return current, and rail potential characteristics, proposing suppression measures for rail potential [4] [5].…”

Section: Introductionmentioning

confidence: 99%

Impact Analysis of High-Speed Train Grounding Modes on the Magnetic Distribution of Train Bodies

Ziba,

Xiao

2024

Advances in Transdisciplinary Engineering

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High-speed train fast movement has a relative effect of instantaneous grounding circuit impedance change which in turn aggravates circumflux and increases train body potential. Consequently, the current entering the body can cause various effects like electromagnetic interference to onboard equipment which may affect normal operation of sensitive equipment like sensors. This paper addresses transient operation with the consideration of transient overvoltage resulting from pantograph lifting and lowering. Therefore, in ensuring safety of equipment and passengers, mobile grounding system of the high speed takes into account the indicators of current and overvoltage and their influence on the electromagnetic environment. To analyze the system, an equivalent circuit of the whole ‘train-rail’ mobile distributed grounding system is constructed based on the practically obtained impedances. This circuit facilitates the examination of current flowing through grounding wheels. Additionally, a 3D model is constructed using finite element (FEM) software to evaluate the effect of TB current on vital vehicle-mounted equipment. The study compares multi-physical distributions under different grounding schemes, emphasizing critical regions containing key devices and establishing an optimal grounding scheme.

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