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Analytical Voltage Optimization Method for DC Railway Networks with Wayside Energy Storage System

Conference Paper (2025)
Author(s)

J.A. Rojas Villarroel (TU Delft - DC systems, Energy conversion & Storage)

P. Bauer (TU Delft - DC systems, Energy conversion & Storage)

S. Rivera (TU Delft - DC systems, Energy conversion & Storage)

DOI related publication
https://doi.org/10.1109/IECON58223.2025.11221184 Final published version
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Publication Year
2025
Language
English
Bibliographical Note
Green Open Access added to TU Delft Institutional Repository as part of the Taverne amendment. More information about this copyright law amendment can be found at https://www.openaccess.nl. Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Publisher
IEEE
ISBN (print)
979-8-3315-9682-8
ISBN (electronic)
979-8-3315-9681-1
Event
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Abstract

This study addresses a 1.8kV bilateral feeding system for DC railway applications, composed of multi-pulse diode rectifiers at both ends and a storage unit with a DC/DC converter located at an intermediate station. The storage system introduces an additional degree of freedom to control power flows by applying a specific voltage at a strategic point between the passive rectifiers. This paper formulates a voltage compensation problem aimed at reinforcing the network while minimizing conduction losses along the catenary. Due to the nonlinear nature of the power balance equations, a closed-form analytical solution is not directly obtained. To overcome this, the paper proposes an approximation method for the pantograph voltage to enable an analytical formulation of the optimization problem. A comparison between the proposed analytical approach and a numerical iterative optimization method is presented and discussed.

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