Mathematic Modelling of Distribution of Traction Current Harmonics

The questions of propagation of traction current harmonics along the length on an homogeneous feeder zone at the one- and two-end power supply and the definition of their influence on code current flowing in rail lines were elaborated. The mathematic modelling of a traction supply net was carried out. The spectrum of traction current and the most dangerous harmonics influencing the track circuits were assessed for the application of electric locomotive with the PWM-invertors. To this end, the values of current and voltage on the primary winding of the traction transformer of the double-section electric locomotive were determined.