Analysis of harmonic resonance in traction power supply system

High frequency harmonics have caused major troubles in Traction Power Supply System (TPSS). This is due to its negative effect on the stability of the network. This phenomenon may lead to an important voltage distortion and current, as well as the increase in the temperature of the main components, transformer, inverter, rectifier, etc. This article presents a study of harmonics and resonance as well as their effects on the stability of the electric traction network. Moreover, it deals with the influencing factors such as the influence of harmonics on the TPSS and the train’s behavior. The modeling methods and the obtained analysis of the results by simulation are presented. According to the results obtained by using MATLAB program and the comparison that was made as well as study of the THD harmonic distortion rate, it shows the impact of the load increase on harmonics production in the TPSS.