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3D modelling of an integrated grounding system for high-speed trains considering rail-train current reflux

3D modelling of an integrated grounding system for high-speed trains considering rail-train current reflux
3D modelling of an integrated grounding system for high-speed trains considering rail-train current reflux
The integrated grounding system for high-speed trains consists of two parts: on-board dynamic and fixed terrestrial grounding sub-systems. The on-board grounding sub-system contains working and protective grounding modes, both of which share the rails as the common path for discharging current. Current reflux occurs frequently, which can contribute to the circumflux in the ‘train body – grounding wheel set – rail’ circle, due to the dynamic coupling effects between grounding points. The path and value of the circumflux vary transiently because of the changing impedance between the grounding wheels and rail under the dynamic conditions. In our previous work, a 2D grounding model was built to evaluate the impact from the current reflux, but the lateral and vertical impedances of train bodies and rails were ignored. In practice – when the protective and working grounding is applied independently to rails on the left- and right-hand side separately – the current reflux can be restricted by benefitting from the impedance existing in train bodies and rails. It therefore becomes essential to build a 3D ‘train–rail’ coupling grounding model accounting for the full-dimension impedances, while different grounding distribution protocols is considered to improve the grounding performance.
3D 'train-rail' coupling grounding model, Electrical resistance measurement, Grounding, High-speed trains, Impedance, Low voltage, Rails, Wheels, Windings, circumflux, current reflux, full- dimension impedances, integrated grounding system
0018-9545
11269-11282
Xiao, Song
6ffa9657-513e-4b86-86a2-e560d3c09c72
Li, Yuhang
c4a9b50f-6702-43c4-ba4d-ceb6cbd05dd0
Tong, Mengyuan
ac222e18-f49d-47e6-b9f4-ca3784a9a734
Ye, Zhizong
870e5424-1516-4358-ac69-64aabaab3652
Wu, Jingchi
b3bb15fe-d2ab-4c82-9f97-1d5fbc150e1e
Rao, Yang
0dd9723b-9182-4896-acf2-6eb1b197e51e
Wu, Guangning
bfc77dce-7b97-40eb-863a-b4041cd3ebcf
Gao, Guoqiang
00d9e24b-c1e9-4ff8-b99f-8d94bc875c67
Sykulski, Jan K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb
Xiao, Song
6ffa9657-513e-4b86-86a2-e560d3c09c72
Li, Yuhang
c4a9b50f-6702-43c4-ba4d-ceb6cbd05dd0
Tong, Mengyuan
ac222e18-f49d-47e6-b9f4-ca3784a9a734
Ye, Zhizong
870e5424-1516-4358-ac69-64aabaab3652
Wu, Jingchi
b3bb15fe-d2ab-4c82-9f97-1d5fbc150e1e
Rao, Yang
0dd9723b-9182-4896-acf2-6eb1b197e51e
Wu, Guangning
bfc77dce-7b97-40eb-863a-b4041cd3ebcf
Gao, Guoqiang
00d9e24b-c1e9-4ff8-b99f-8d94bc875c67
Sykulski, Jan K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb

Xiao, Song, Li, Yuhang, Tong, Mengyuan, Ye, Zhizong, Wu, Jingchi, Rao, Yang, Wu, Guangning, Gao, Guoqiang and Sykulski, Jan K. (2021) 3D modelling of an integrated grounding system for high-speed trains considering rail-train current reflux. IEEE Transactions on Vehicular Technology, 70 (11), 11269-11282. (doi:10.1109/TVT.2021.3115360).

Record type: Article

Abstract

The integrated grounding system for high-speed trains consists of two parts: on-board dynamic and fixed terrestrial grounding sub-systems. The on-board grounding sub-system contains working and protective grounding modes, both of which share the rails as the common path for discharging current. Current reflux occurs frequently, which can contribute to the circumflux in the ‘train body – grounding wheel set – rail’ circle, due to the dynamic coupling effects between grounding points. The path and value of the circumflux vary transiently because of the changing impedance between the grounding wheels and rail under the dynamic conditions. In our previous work, a 2D grounding model was built to evaluate the impact from the current reflux, but the lateral and vertical impedances of train bodies and rails were ignored. In practice – when the protective and working grounding is applied independently to rails on the left- and right-hand side separately – the current reflux can be restricted by benefitting from the impedance existing in train bodies and rails. It therefore becomes essential to build a 3D ‘train–rail’ coupling grounding model accounting for the full-dimension impedances, while different grounding distribution protocols is considered to improve the grounding performance.

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Published date: 24 September 2021
Keywords: 3D 'train-rail' coupling grounding model, Electrical resistance measurement, Grounding, High-speed trains, Impedance, Low voltage, Rails, Wheels, Windings, circumflux, current reflux, full- dimension impedances, integrated grounding system

Identifiers

Local EPrints ID: 453932
URI: http://eprints.soton.ac.uk/id/eprint/453932
ISSN: 0018-9545
PURE UUID: d26b6d9a-9748-4f47-8bdd-124da17e2e64
ORCID for Jan K. Sykulski: ORCID iD orcid.org/0000-0001-6392-126X

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Date deposited: 25 Jan 2022 18:25
Last modified: 17 Mar 2024 02:33

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Contributors

Author: Song Xiao
Author: Yuhang Li
Author: Mengyuan Tong
Author: Zhizong Ye
Author: Jingchi Wu
Author: Yang Rao
Author: Guangning Wu
Author: Guoqiang Gao
Author: Jan K. Sykulski ORCID iD

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