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Distribution of Currents in 2 × 25 kV Electric Railway Systems under Normal Conditions

Sorrentino, Elmer; Gupta, Naren; Montilla-DJesus, Miguel; Arriaga, Pablo

Authors

Elmer Sorrentino

Naren Gupta

Miguel Montilla-DJesus

Pablo Arriaga



Abstract

This article shows a detailed analysis of the distribution of currents in 2 × 25 kV electric railway systems under normal conditions. The network equations are clearly formulated in a way that enables the presentation of a novel simplified analytical solution as well as the traditional numerical solution of the equation set. The simplified analytical solution is obtained when the transformer impedances are neglected, and under these conditions: (a) the distributions of currents are analytically deduced for cases with only one train; (b) the distribution of currents among autotransformers and between catenary and feeder can be easily understood, as well as the effect of the train position on the distribution of currents; and (c) the superposition method is applied for cases with multiple trains in order to clearly explain the distribution of currents from the results with only one train. On the other hand, the network equations are also numerically solved, including autotransformer impedances, and it is shown that their effect is very low, especially because these impedances are typically small. Therefore, the proposed analytical method is a good tool to obtain an easy and approximate solution for the distribution of currents in these systems, as well as an excellent tool to facilitate the understanding of that distribution.

Citation

Sorrentino, E., Gupta, N., Montilla-DJesus, M., & Arriaga, P. (2023). Distribution of Currents in 2 × 25 kV Electric Railway Systems under Normal Conditions. International Transactions on Electrical Energy Systems, 2023, Article 4930801. https://doi.org/10.1155/2023/4930801

Journal Article Type Article
Acceptance Date Jan 24, 2023
Online Publication Date Feb 8, 2023
Publication Date 2023
Deposit Date Mar 24, 2023
Publicly Available Date Mar 24, 2023
Journal International Transactions on Electrical Energy Systems
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 2023
Article Number 4930801
DOI https://doi.org/10.1155/2023/4930801

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