Electromagnetic interference of single-phase AC-DC traction converter

The main goal of this paper is to analyze a low harmonic interferences of ac-dc traction converter and the influence of selected signals. In this case, the ac-dc converter is based on H-bridge topology. This type of converter is important part of a majority modern ac locomotives. The main interest was focused on 25 kV / 50 Hz traction system used in Czech Republic. The simulation and experimental results of single-phase voltage-source active rectifier with harmonic analyses of input ac currents and voltages are presented in this paper. This study is performed on the real ac-dc converter including long dead time delays, discrete control delay, semiconductors threshold voltage and conductive losses.