EURO 2024 Copenhagen
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3639. Sustainable Timetabling: Integrating Regenerative Braking into a PESP Model

Invited abstract in session WC-51: Timetabling 1, stream Public Transport Optimization.

Wednesday, 12:30-14:00
Room: M5 (building: 101)

Authors (first author is the speaker)

1. Sarah Roth
2. Sven Jäger
Department of Mathematics, RPTU Kaiserslautern-Landau
3. Anita Schöbel
Department of Mathematics, University of Kaiserslautern-Landau

Abstract

While a shift from individual transport to public transport is necessary to reach climate goals, also the public transport system consumes a non-negligible amount of energy. Modern electric motors are able to regenerate energy while braking. In the context of rail traffic, the most efficient way to use the regained energy is to transfer it via the catenary to an accelerating train close by. Therefore, it makes sense to select the timetable so that braking and acceleration processes of trains near each other take place simultaneously.
In this talk a new MIP model is introduced that finds a feasible periodic timetable optimizing the usage of energy obtained from regenerative brakes. Assigning arrival and departure times, the model also decides between which pairs of trains a transfer of energy takes place and it maximizes the total brake traction overlap. The new model based on the PESP is compared to previous models that optimize the usage of regenerative energy and computational results are presented.
While the usage of regenerative energy profits from synchronized brake and traction phases of two trains, this prevents the transfer of passengers from the braking to the accelerating train. We analyze the tradeoff between energy and travel-time optimization and show first properties of Pareto-optimal timetables for the special case of one transfer station.

Keywords

Status: accepted

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