In a DC electric railway to supply DC power to an electric railway car through feeder lines from a plurality of feeding substations, a task is to discriminate a section of a ground fault accident accurately. A VLD control and data collection device 51 is provided in each of feeding sections of the feeding substations. The device 51 includes a short-circuit switch (VLD 50) connected between a rail 37 and an earth 38 and arranged to be closed when a rail-earth voltage between the rail and the earth becomes higher than or equal to a preset voltage. The device 51 collects electric information including the rail-earth voltage and a passage current passing through the short-circuit switch after closure of the short-circuit switch. A ground fault discrimination device 60 is provided to discriminate a ground fault accident from a current magnitude, a conduction time and a conduction direction of the passage current flowing through the short-circuit switch by using the electric information collected by each of the VLD control and data collection devices 51.
DC GROUND FAULT DETECTION SYSTEM AND DC GROUND FAULT DETECTION METHOD FOR DC ELECTRIC RAILWAY
GLEICHSTROM-ERDFEHLERDETEKTIONSSYSTEM UND GLEICHSTROM-ERDFEHLERDETEKTIONSVERFAHREN FÜR ELEKTRISCHE GLEICHSTROMSCHIENEN
SYSTÈME ET PROCÉDÉ DE DÉTECTION DE DÉFAUT À LA TERRE DE COURANT CONTINU DE CHEMIN DE FER ÉLECTRIQUE À COURANT CONTINU
2020-02-26
Patent
Elektronische Ressource
Englisch
DC GROUND FAULT DETECTION SYSTEM AND DC GROUND FAULT DETECTION METHOD FOR DC ELECTRIC RAILWAY
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