3D Modelling of an Integrated Grounding System for High-Speed Trains Considering Rail-Train Current Reflux

Xiao, Song; Li, Yuhang; Tong, Mengyuan; Ye, Zhizong; Wu, Jue; Rao, Yang; Wu, Guangning; Gao, Guoqiang; Sykulski, J.K.

doi:10.1109/tvt.2021.3115360

Cited by 6 publications

(4 citation statements)

References 28 publications

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“…The refraction and reflection coefficients of the traveling wave at station A are shown in ( 5) and (6).…”

Section: Mechanisms For the Generation Of Faulty Traveling Wave Spectramentioning

confidence: 99%

“…The low and medium speed magnetic levitation uses the positive rail for power supply and the negative rail for return, and the power supply rail and return rail are installed on both sides of the track beam through insulators, so the possibility of short circuit faults between the positive and negative poles is low [5,6]. However, due to aging insulators and track fouling, the occurrence of power supply rail ground faults during train operation is more likely to occur [7].…”

Section: Introductionmentioning

confidence: 99%

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Protection method of traction power supply system for low and medium speed Maglev traffic based on fault traveling wave features

Yan,

Wang,

2023

IET Generation Trans & Dist

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Low and medium speed magnetic levitation traffic with short power supply distance and complex grounding network structure, prone to power supply rail grounding faults. However, the existing fault location methods do not accurately locate the fault point, making it difficult for the protective device to act to cut off the fault. To address the above problems, this paper builds a dynamic simulation model of the low and medium speed magnetic levitation power supply rails to study the distribution characteristics of the fault traveling waves after a ground fault occurs in the power supply rails, and analyses the generation mechanism of the traveling wave spectrum through formula calculation. First, the difference in current between the positive and negative bus bars is analyzed to determine whether a ground fault has occurred. Second, the direction of the current difference between stations is compared to locate the faulty section. Finally, the fault distance is calculated from the frequency difference of the fault voltage at the double‐ended station. Through simulation, the method is validated to be unaffected by fault location, fault transition resistance, noise interference, and is applicable to short circuit faults caused by lightning strikes, and the ranging error always remains within 20 m. The method has strong robustness, can effectively solve the problem of protection misoperation and accurately locate the fault point. It is suitable for low and medium speed magnetic levitation transportation power supply rail ground fault.

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“…The refraction and reflection coefficients of the traveling wave at station A are shown in ( 5) and (6).…”

Section: Mechanisms For the Generation Of Faulty Traveling Wave Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Protection method of traction power supply system for low and medium speed Maglev traffic based on fault traveling wave features

Yan,

Wang,

2023

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

“…The refraction and reflection coefficients of the traveling wave at station A are shown in ( 5) and (6). By Davinan's equivalence theorem, the supply system is equated when a DC earth fault occurs in the supply rail.…”

Section: Figure 7 Supply Rail Short Circuit Diagrammentioning

confidence: 99%

“…The low and medium speed magnetic levitation uses the positive rail for power supply and the negative rail for return, and the power supply rail and return rail are installed on both sides of the track beam through insulators, so the possibility of short circuit faults between the positive and negative poles is low [5] - [6]. However, due to aging insulators and track fouling, there is an increased possibility of ground faults in the supply rails during train operation [7].…”

Section: Introductionmentioning

confidence: 99%

Protection Method of Traction Power Supply System for Low and Medium Speed Maglev Traffic Based on Fault Traveling Wave Features

Yan

Wang

2023

Preprint

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Low and medium speed magnetic levitation traffic with short power supply distance and complex grounding network structure, prone to power supply rail grounding faults. However, the existing fault location methods do not accurately locate the fault point, which in turn makes it difficult for the protection device to act to cut off the fault. To address the above problems, this paper builds a dynamic simulation model of the low and medium speed magnetic levitation power supply rails to study the distribution characteristics of the fault traveling waves after a ground fault occurs in the power supply rails, and analyses the generation mechanism of the traveling wave spectrum through formula calculation. The first step is to determine whether an earth fault has occurred by analysing the difference in current between the positive and negative busbars. Secondly, the direction of the current difference between stations is compared to locate the faulty section. Finally, the fault distance is calculated from the frequency difference of the fault voltage at the double-ended station. Through simulation, the method is validated to be unaffected by fault location, fault transition resistance, noise interference, and is applicable to short circuit faults caused by lightning strikes, and the ranging error always remains within 20m. The method has strong robustness, can effectively solve the problem of protection misoperation and accurately locate the fault point. It is suitable for low and medium speed magnetic levitation transportation power supply rail ground fault.

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Mechanism of rail potential imbalance in long tunnel based on GA and analysis of improvement and optimization measures

Pan

2024

Results in Engineering

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3D Modelling of an Integrated Grounding System for High-Speed Trains Considering Rail-Train Current Reflux

Cited by 6 publications

References 28 publications

Protection method of traction power supply system for low and medium speed Maglev traffic based on fault traveling wave features

Protection method of traction power supply system for low and medium speed Maglev traffic based on fault traveling wave features

Protection Method of Traction Power Supply System for Low and Medium Speed Maglev Traffic Based on Fault Traveling Wave Features

Mechanism of rail potential imbalance in long tunnel based on GA and analysis of improvement and optimization measures

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