Influence of Commutational Interferences on the Analysis of Harmonics in the Traction Current

Abstract

Commutation phenomena related to the processes of changing the amount of power taken or returned by a vehicle affect the frequency spectrum contained within the traction current. The paper presents the influence of selected physical phenomena on the parameters taken for FFT analysis utilized for assessment of the disturbances generated into the traction network. The paper also describes the stands used for measuring disturbances generated into the traction network. The results of the measurements and calculations of the frequency response of simulated signals are presented, as well as signals measured in real conditions during traction vehicle tests, which are useful for assessing the influence of commutational interferences on the analysis of harmonics in the traction current. Keywords: interferences, EMC, traction, interoperability