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Impact of Superconducting Cables on a DC Railway Network

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  • Ghazi Hajiri

    (Université de Lorraine, GREEN, F-54000 Nancy, France
    These authors contributed equally to this work.)

  • Kévin Berger

    (Université de Lorraine, GREEN, F-54000 Nancy, France
    These authors contributed equally to this work.)

  • Frederic Trillaud

    (Instituto de Ingeniería, Universidad Nacional Autónoma de México, Mexico City 04350, Mexico
    These authors contributed equally to this work.)

  • Jean Lévêque

    (Université de Lorraine, GREEN, F-54000 Nancy, France)

  • Hervé Caron

    (Département de la Traction Électrique, SNCF Réseau, F-93418 La Plaine Saint-Denis, France)

Abstract

The Société Nationale des Chemins de fer Français (SNCF) is facing a significant challenge to meet the growth in rail traffic while maintaining continuous service, particularly in densely populated areas such as Paris. To tackle this challenge, the SNCF has implemented several electrification projects. These projects aim to reduce line losses and decrease voltage drops on the railway network. Amongst the possible technological choices, high temperature superconductor (HTS) cables have been evaluated, since they offer greater energy density at lower electrical losses than conventional cables. This feature is advantageous in order to transmit more electrical energy at a lesser footprint than conventional cable, therefore avoiding costly modifications of the existing infrastructures. In the present work, the electromagnetic response of two HTS cables topologies, unipolar and bipolar, was analyzed, and their impact on a direct current (DC) railway network under load was assessed. A commercial finite element (FE) software, COMSOL Multiphysics, was used to carry out a detailed FE model that accounts for the non-linearity of the electrical resistivity ρ ( J , B , θ ) of the superconducting cable. This FE model was coupled with a lumped-parameter circuit model of the railway network, which is particularly suited for transient simulations considering train motion. Based on a case study representing a portion of the Parisian railway network, it was found that the insertion of a superconducting cable can result in a reduction of electrical losses by 60% compared to conventional cable as well as an 8.6% reduction in the total electrical consumption of the traction network.

Suggested Citation

  • Ghazi Hajiri & Kévin Berger & Frederic Trillaud & Jean Lévêque & Hervé Caron, 2023. "Impact of Superconducting Cables on a DC Railway Network," Energies, MDPI, vol. 16(2), pages 1-33, January.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:2:p:776-:d:1030181
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    References listed on IDEAS

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