An SOS2-based Moving Trains, Fixed Nodes,
Railway Power System Simulator
Author(s)
L. Abrahamsson & L. S¨oder
Abstract
This paper presents and proposes an optimization model for railway power
supply system simulations. It includes detailed power systems modeling,
train movements in discretized time considering running resistance and other
mechanical constraints, and the voltage-drop-induced reduction of possible train
tractive forces. The model has a fixed number of stationary power system nodes.
The proposed model uses SOS2 (special ordered sets of type 2) variables to
distribute the train loads to the two most adjacent power system nodes available.
The impact of the number of power system nodes along the contact line and the
discretized time step length impacts on model accuracy and computation times are
investigated.
The program is implemented in GAMS (General Algebraic Modeling System).
Experiences from various solver choices are also presented. The train traveling
times are minimized in the example. Other studies could, e.g. consider energy
consumption minimization. The numerical example is representative for a Swedish
non-centralized, rotary-converter fed railway power supply system. The proposed
concept is however generalizable and could be applied for all kinds of moving load
power system studies.
Keywords: optimization, railway, power systems, load flow, special ordered sets of
type 2, MINLP, moving loads, simulation, driving strategies.
Keywords
optimization, railway, power systems, load flow, special ordered sets of
type 2, MINLP, moving loads, simulation, driving strategies.
Related Book
Other papers in this volume
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