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Modeling and dynamic analysis of uneven parameter metro stray current distribution

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Abstract

Based on the actual operation scenario of metro, this paper proposes an uneven parameter stray current distribution model. The model combines the calculation method of multi-section traction power supply of metro and establishes an uneven parameter stray current distribution model in different calculation domains with the metro operation position and the traction substation position as the boundary points. The improved dynamic boundary conditions were used to calculate the model. Compared with the experimental data, the average maximum deviation between the two was 0.677. Meanwhile, the dynamic space–time distribution characteristics of stray current and the change law of rail-to-ground voltage were obtained through simulation analysis. In addition, the calculation model for ground potential gradient distribution under stray current interference was established by discretizing stray currents within each calculation domain, and the characteristics of ground potential gradient distribution were simulated and analyzed. The results showed that the distribution period of stray current was approximately equal to the headway, and the waveform change lagged behind the rail-to-ground voltage. The fluctuation degree of ground potential gradient was obviously affected by the length of power supply interval and train operation conditions.

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The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Authors and Affiliations

  1. School of Control and Mechanical Engineering, Tianjin Chengjian University, Tianjin, 300384, China

    Guoqing Yang, Xuehui Ma & Zhennan Cao

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  1. Guoqing Yang
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  2. Xuehui Ma
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  3. Zhennan Cao
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Contributions

GY critically revised the manuscript. XM and ZC completed the writing of the main manuscript and the processing of data and images. All authors reviewed the manuscript.

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Correspondence to Guoqing Yang.

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Yang, G., Ma, X. & Cao, Z. Modeling and dynamic analysis of uneven parameter metro stray current distribution. Electr Eng 106, 2021–2032 (2024). https://doi.org/10.1007/s00202-023-02053-5

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  • DOI: https://doi.org/10.1007/s00202-023-02053-5

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