Efficient Design Of Automatic Train Operation
Speed Profiles With On Board
Energy Storage Devices
Author(s)
M. Domínguez, A. Fernández, A. P. Cucala & J. Blanquer
Abstract
Energy usage in electrical railway systems is being studied in order to find
technologies and developments for increasing energy efficiency. It is not only an
environmental problem, but also concerns railway infrastructures as an
economical aspect. The problem is finding which system to invest in for
decreasing energy consumption and costs. In this paper, two possibilities are
studied. The first one is the redesign of the ATO (Automatic Train Operation)
speed profiles of metro lines. The speed commands in service nowadays were
selected based on time and comfort criteria. In addition, in this paper the
consideration of energetic criteria is taken into account. Complementing the
previous possibility, the implementation of an on board energy storage device is
evaluated. The regenerated energy of electrical brakes in metropolitan railways is
not used if there is no other train starting up at the same time, and it is wasted
with heating resistors. With the aim of taking advantage of regenerative energy,
the economical and energetic advantages of investing in an on board storage
device, despite its additional mass, are studied. Both approaches are finally
jointed, obtaining speed profiles that are even more efficient with the
implementation of the device. Optimal Pareto curves, where the best solutions
are placed, are modified taking into account on board storage devices. A
simulator is needed for the proper simulation of all the possible speed
commands. It has been developed and validated with measurements in line 10 of
the Madrid Underground. Solutions show that about 25% of energy savings are
expected with only the speed profiles redesign. In addition, it is shown how these
Keywords
regenerative energy, ecodriving, electrical brake, metropolitan trains, ATO speed profiles, optimal design
Related Book
Other papers in this volume
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