INGENIEUR
Figure A10: Control Loop of the Railway Signalling System.
module. The electrical network is formed by
nodes and branches. Fixed plants (substations,
feeder connection points, etc.) form fixed nodes,
whose locations do not change with time. Trains
are moveable nodes, whose location change
with time. From the locations of all nodes in the
circuit, impedances (resistances) between nodes
and ground and impedances (resistances) for
branches between nodes are calculated for the
given time instant. A set of Linear equations are
then formed and solved. The solution process
is an iterative process because the amount of a
train’s power demand is dependent on the voltage
level as in load flow algorithm.
Figure A9 summarizes the process of modelling
and simulation as deployed in the MM-TRAIN TM
software.
(B) Signalling and Control System
The railway signalling and control system is
needed for the safe control of transport by rail
traffic.
The objectives and tasks of the signalling and
control can be defined as follows:
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VOL63
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JUNE
2013
Signalling Systems
The signalling system ensures the safe control
of transport processes.