Browsing by Author "Feliziani, Mauro"

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    About Electromagnetic Compatibility of Track Circuits with the Traction Supply System of Railway
    (Institute of Electrical and Electronics Engineers, IEEE, 2018) Serdiuk, Tetiana M.; Feliziani, Mauro; Serdiuk, Kseniia
    ENG: Track circuits are of fundamental importance for the safety in railway systems. Thus, they must be immune from electromagnetic interference (EMI). To this aim they must be accurately characterized. The paper deals with the determination of spectrum composition of traction current with the electric traction. A method of measuring the parameters of track circuits (time and amplitude parameters of code current, flowing in rail lines, an input impedance of a track circuit, characteristic impedance and propagation constant) is considered Automated method of measurement of parameters of track circuits and harmonics of return traction current was elaborated by the car-laboratory. The harmonics coinciding with the code frequency are inadmissible for the track circuits.
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    Propagation of Harmonics of Return Traction
    (Institute of Electrical and Electronics Engineers, IEEE, 2019) Serdiuk, Tetiana M.; Havryliuk, Volodymyr I.; Serdiuk, Kseniia; Feliziani, Mauro
    ENG: An investigation of propagation of return traction current harmonics in rail lines was carried out for railway sections with d. c. and a. c. traction. A mathematic model of traction supply net was proposed. The improved mathematical model of traction supply net allows us to estimate the propagation of harmonics and traction return current along the feeder zone with different kind of power supply system. The impedance of a power network wasdetermined for low frequency interferences of return traction current. Also this paper deals with the determination of spectrum composition of traction current and most dangerous harmonics for track circuits.