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Research on the Grounding System of Dual-system Trains
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Xuefei LI1, Wenbin SUN1, Jun DAI2, Wei LIU2, Mingze LI3
Urban Rapid Rail Transit | 2025, 38(3) : 131 - 137
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Urban Rapid Rail Transit | 2025, 38(3): 131-137
• Electrical and Mechanical Engineering •
Research on the Grounding System of Dual-system Trains
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Xuefei LI1, Wenbin SUN1, Jun DAI2, Wei LIU2, Mingze LI3
Affiliations
  • 1 CRRC Changchun Railway Vehicle Co., Ltd. Changchun 130062
  • 2 School of Electrical Engineering Southwest Jiaotong University Chengdu 611730
  • 3 School of Automation and Information Engineering Sichuan University of Science & Engineering Yibin 644000
Published: 2025-06-01 doi: 10.3969/j.issn.1672-6073.2025.03.018
Outline
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Unreasonable grounding system can cause problems such as increased train axle potential and circular current, as well as bearing erosion, deteriorating the electromagnetic environment of onboard electronic equipment, and thus pose a threat to the safety of train operation. Therefore, it is necessary to design the train grounding system appropriately. First, uniform chain circuit model is used to model the traction power supply system and dual current train grounding system. Secondly, through traction and power supply calculations, the train current can be obtained. Taking train current as the excitation source, the distribution of train axle voltage and circular current can be obtained. Take the currents of grounding resistors as a measure of the vehicle circular current distribution. Finally, PSO algorithm is used to optimize the train grounding system. After the optimization, the maximum circular current decreases by about 20%, and the maximum vehicle axle voltage declines slightly. The optimization of the train grounding system in this article presents a guide for the design of the grounding system for dualsystem trains, as well as provides a reference for other trains.

rail transit  /  dual-system train  /  grounding system  /  axle potential  /  circular current  /  particle swarm optimization (PSO)
Xuefei LI, Wenbin SUN, Jun DAI, Wei LIU, Mingze LI. Research on the Grounding System of Dual-system Trains[J]. Urban Rapid Rail Transit, 2025 , 38 (3) : 131 -137 . DOI: 10.3969/j.issn.1672-6073.2025.03.018
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Year 2025 volume 38 Issue 3
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Article Info
doi: 10.3969/j.issn.1672-6073.2025.03.018
  • Receive Date：2024-05-08
  • Online Date：2025-07-09
  • Published：2025-06-01
Article Data
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History
  • Received：2024-05-08
  • Revised：2024-11-25
Funding
Affiliations
    1 CRRC Changchun Railway Vehicle Co., Ltd. Changchun 130062
    2 School of Electrical Engineering Southwest Jiaotong University Chengdu 611730
    3 School of Automation and Information Engineering Sichuan University of Science & Engineering Yibin 644000
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