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Fault diagnostics in a traction circuit by means of the stray current analysis

Neumann A., Paleček J.

Przegląd Elektrotechniczny

2016

R. 92, nr 6

160--162

This paper deals with the forming of stray currents in industrial spurs, stabling tracks and special purpose tracks near DC-electrified tracks. It describes methods which can be used to identify failures that lead to the occurrence of stray currents. Some innovative measuring methods are also introduced, all of them are based on results and knowledge obtained by practical experiments. The data and measurement results used in this paper come from measurements performed in the Bohumín railway station depot. It was found out that at this railway station, traction current leaked into the lightning control system. The method that was used in tracing these parasitic current paths, as well as the failures which led to the occurrence of these currents, are described in this paper.

W artykule analizowano prądy rozproszone w bocznicach przemysłowych i torach w pobliżu trakcji DC. Pozwala to na wykrywanie uszkodzeń prowadzących do wzrostu tych prądów.

Influence of AC Electric Traction on Harmonic Distortion in 110 kV Supply Voltage Network: Measurement and Simulation

Tien-Trung V., Paleček J., Kolář V.

Przegląd Elektrotechniczny

2013

R. 89, nr 7

13--16

This paper deals with reverse effects of AC electric traction operation on 110kV supply system, from the point of view of spreading of harmonics. Investigation results for standard operation conditions are presented. The graphic part of this paper shows measurement results obtained by means of virtual instrumentation, with the use of LabVIEW software. In the next part is presented a model of the system on which the measurements were carried out, i.e. overhead lines, 110/27kV traction transformer substation and part of the power supply system. With the help of this model, an investigation of the spreading of harmonics in the power supply system was carried out. The conclusion of the paper includes a comparison between simulation and measurement results.

W artykule zaprezentowano analizę zakłóceń wprowadzanych do sieci zasilającej przez trakcję AC. Przedstawiono wyniki pomiarów wykonanych z układem wykorzystującym oprogramowanie LabView. Przedstawiono także model systemu.