Impact Of Train Model Variables On Simulated
Energy Usage And Journey Time
Author(s)
P. Lukaszewicz
Abstract
Several train model input variables, such as running resistance, line voltage,
adhesion, braking release time and braking gain time, are studied. An analysis is
performed on how variations in the variables impact relatively on calculated
energy usage and running time of trains. The study shows that for the calculation
of energy usage the simulations are most sensitive to variations in running
resistance, followed by line voltage, adhesion, braking release time and braking
gain time. For the running time, the study shows that variation in mechanical
rolling resistance and air drag has a relatively small influence provided that the
tractive force is big enough. If the line voltage and adhesion, which affect here
the tractive force, drop below certain levels the running time increases
dramatically. The braking release and gain times have little influence on the
running time. The results also show which variables should be paid extra
attention to, when constructing a train model.
Keywords: train modelling, train data, sensitivity, power consumption, energy
usage, running time, simulations, ERTS.
1 Introduction
The correctness of computed results of energy usage and running time of trains
in a railway network is dependent upon the chosen train model and input data.
Therefore it is of interest to examine quantitatively how much the results can
differ from each other if the input data used by the same train model varies and
which data should be paid extra attention to.
By means of sensitivity analysis, the impact of the following variables is
studied for a SJ Rc4 loco hauled freight train:
Keywords
train modelling, train data, sensitivity, power consumption, energy
usage, running time, simulations, ERTS.
Related Book
Other papers in this volume
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