Dynamic Diffusion Model of Stray Current in DC Traction Power Supply System

Liu, Wei; Zhou, Linjie; Pan, Zhe; Bhatti, Ashfaque Ahmed; Huang, Xiaopeng; Zhang, Jian

doi:10.1109/tpwrd.2023.3240753

Cited by 15 publications

(7 citation statements)

References 25 publications

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“…This paper introduces a hierarchical operation optimization method for regenerative braking energy utilization in urban rail TPSS with EFS, which is beneficial for the intelli- T [1] between dynamic scheme and fixed 1750 V; (b) P t T [2] between dynamic scheme and fixed 1750 V; (c) P t T [3] between dynamic scheme and fixed 1750 V.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, significant progress has been made in the utilization of regenerative braking energy in urban rail TPSS [1][2][3]. These achievements include the implementation of practical engineering solutions such as energy feedback systems (EFSs), bidirectional converter devices (BCDs), energy storage systems (ESSs), and on-board braking resistors (OBRs) [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Figure 20. (a) P tT[1] between dynamic scheme and fixed 1750 V; (b) P t T[2] between dynamic scheme and fixed 1750 V; (c) P t T[3] between dynamic scheme and fixed 1750 V.…”

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confidence: 99%

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Hierarchical Operation Optimization for Regenerative Braking Energy Utilizing in Urban Rail Traction Power Supply System

Zhang,

Zhou

et al. 2023

Energies

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The energy feedback system (EFS) is widely accepted to utilize the regenerative braking energy (RBE) in an urban rail traction power supply system (TPSS). However, the sharing relationship of RBE between EFS, traction trains and on-board braking resistors is not clear. In addition, the impact of EFS operation on the sharing of RBE has been rarely studied. This paper proposed a hierarchical operation optimization method for improving the utilization of shared RBE in TPSS through the EFS. An optimizing model for the dynamic start-up voltage threshold of EFS is established, with the objective of minimizing TPSS power consumption. A fast prediction model of train operation information is developed to analyze the steady-state power flow in advance. The optimal solution is searched using a salp swarm algorithm (SSA) on a per second basis. A microsystem of three traction stations and two trains is analyzed. Compared to the conventional constant voltage operation scheme, the optimal solution achieves a maximum additional energy-saving efficiency improvement of 2.44%. Efficient sharing of RBE is identified as the key to achieving energy savings. Regarding the local control part, system stability analysis is verified. Real-time simulation results indicate that the dynamic operating mode of EFS efficiently distributes RBE.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hierarchical Operation Optimization for Regenerative Braking Energy Utilizing in Urban Rail Traction Power Supply System

Zhang,

Zhou

et al. 2023

Energies

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“…In view of the existing worldwide studies on stray current modelling, there's still a lack of modelling research on the interference scope of stray currents. Although some studies have drawn important conclusions about the interference scope [9,19], the understanding of interference scope of stray current is still insufficient, especially regarding some special areas such as metro depot, metro tunnel, viaduct, etc.…”

Section: Fig 1 Stray Current Of DC Metro Systemmentioning

confidence: 99%

Assessment of interference scope induced by stray current in the metro depot for the corrosion risk of buried metal pipeline

Wang,

et al. 2024

Electr Eng

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The hazard of stray current attracts more and more attention due to the potential infrastructure failure caused by the electrochemical corrosion. In view of the poor insulation performance and lack of stray current collection system in the metro depot, stray current leakage becomes particularly evident in this area. In order to evaluate the corrosion risk of buried metal pipeline surrounding metro depot, an assessment model for interference scope induced by stray current is proposed in this paper. The distribution of stray current is calculated based on the resistive network by considering different boundary conditions in different areas of metro depot, and the interference scope is assessed by surface potential gradient for corrosion risk of corroded pipeline. Moreover, the characteristics of surface potential gradient distribution in different areas of metro depot and the influence of electrical parameters are analyzed. Finally, the proposed model is verified through CDEGS-based simulation and experimental results.

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“…The resistive network method used by the above-mentioned scholars is based on Kirchhoff's circuit laws and Ohm's law, and differential equations are established to solve for the stray current distribution. The equivalent circuit model is often built according to the structure of the ground network; there are the "rail-earth" two-layer equivalent model [4], the "rail-SCCM-earth" three-layer equivalent model [9], and the "rail-SCCM-buried metal-earth" four-layer equivalent model [10], as well as the equivalent model of the subway depot [11], and so on. In related studies, loop resistance (transition resistance, rail longitudinal resistance, buried metal longitudinal resistance, etc.)…”

Section: Introductionmentioning

confidence: 99%

Analysis of Stray Current Leakage in Subway Traction Power Supply System Based on Field-Circuit Coupling

Lin,

Tang,

Chen

et al. 2024

Energies

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In a rail transit system, there is a constant leakage of current from the subway rails to the earth, and these stray currents have complex propagation paths and a wide range of influence. Since no stray current collection devices are installed at subway depots, some of the stray current leaking from the mainline will converge at the depot, seriously corroding the structural reinforcement and buried metal of the station, thereby jeopardizing the normal operation of subway trains and passenger safety. In this paper, a field-circuit coupling method is proposed to analyze the current leakage and distribution law of the subway mainline and depot. It is found that the failure of the gauge block at the mainline will trigger the maximum leakage of rail current. Additionally, it is observed that the stray current distribution at the depot is mainly influenced by the operating status of the one-way conduction device (OWCD) and the change of rail potential. These results validate the applicability and effectiveness of the field-circuit coupling method proposed in this paper and provide new technical support for the study of stray current leakage distribution in subways.

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Dynamic Diffusion Model of Stray Current in DC Traction Power Supply System

Cited by 15 publications

References 25 publications

Hierarchical Operation Optimization for Regenerative Braking Energy Utilizing in Urban Rail Traction Power Supply System

Hierarchical Operation Optimization for Regenerative Braking Energy Utilizing in Urban Rail Traction Power Supply System

Assessment of interference scope induced by stray current in the metro depot for the corrosion risk of buried metal pipeline

Analysis of Stray Current Leakage in Subway Traction Power Supply System Based on Field-Circuit Coupling

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