This paper present and discuss two methods that allows defining MTL models that allows to represent the railway power electrification systems with a reduced number of conductors. Groups of conductors shorted together are replaced with an equivalent conductor and group of conductors grounded are included into the reference conductor. Reducing criteria are developed in the frequency domain and their extension to the time domain is discussed. A section of the Italian 2x25 kV 50 Hz AC high speed railway power system is considered as a benchmark and reduction methods are applied to the MTL cells that represent this kind of electrification system, also including the high voltage grid that supply the Electrical Substation. The equivalent impedance at pantograph terminals and the disturbances on the track circuits caused by trains harmonic current injection are evaluated by using reduced models and taking into account several train positions along the railway line. The numerical results are reported, compared and discussed, considering both precision and computational times.

Multiconductor transmission line models for PQ and EMC analysis of railway electrification systems

DOLARA, ALBERTO;LEVA, SONIA
2012

Abstract

This paper present and discuss two methods that allows defining MTL models that allows to represent the railway power electrification systems with a reduced number of conductors. Groups of conductors shorted together are replaced with an equivalent conductor and group of conductors grounded are included into the reference conductor. Reducing criteria are developed in the frequency domain and their extension to the time domain is discussed. A section of the Italian 2x25 kV 50 Hz AC high speed railway power system is considered as a benchmark and reduction methods are applied to the MTL cells that represent this kind of electrification system, also including the high voltage grid that supply the Electrical Substation. The equivalent impedance at pantograph terminals and the disturbances on the track circuits caused by trains harmonic current injection are evaluated by using reduced models and taking into account several train positions along the railway line. The numerical results are reported, compared and discussed, considering both precision and computational times.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/712347
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