Siemens Aktiengesellschaft

Siemens Mobility Gmbh

Martin Altmann

Rainer Gruber

Ulrich Halfmann

Egid Schneider

Otto Schmid

Wolfgang Braun

Roberto Bianchi

Thomas Koch

Axel Schmieder

Imre Pomeisl

Albrecht Brodkorb

Klaus-Peter Dillmann

A method and a device for monitoring a power supply apparatus of a traffic system. A computer-based model of the power supply apparatus is created inter alia with the aid of predetermined parameters which are relevant for the power supply apparatus. The invention aims to meet changed requirements of modern power supply devices. Current characteristic quantities are determined during the operation of the traffic system and the operation of the power supply device is simulated at least with the aid of the model and the characteristic quantities.

Method and device for monitoring a power supply device of a traffic system

A method is for identifying risks as a result of stray currents which flow to ground from a rail which returns a traction current in a track with a DC power supply. In accordance with a first embodiment, in which the voltage between the rail and ground is measured and an increased risk as a result of stray currents is indicated if there is a discrepancy from a voltage reference value, provision is made for the voltage to be measured at a plurality of measurement points along the track and for the measurements to be evaluated in an evaluation center. In accordance with a second embodiment, provision is made for activating a short-circuiter to connect a parallel path to the rail for returning the traction current. The current level in the parallel path is then measured and an increased risk as a result of stray currents is indicated if there is a discrepancy from a current-level reference value. Further, the method includes joint evaluation of a plurality of measurements which have been ascertained along the track.

Method for identifying risks as a result of stray currents

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Erlangen, Germany

Martin Altmann