Highlighting the effects of an active filter on the power supply lines of an electric locomotive, by using the PSCAD software

This paper analyzes the effects obtained after connecting an active filter in a traction substation. The active filter command is made according to the active and reactive power obtained using the Clarke transformation. The active filter simulated in PSCAD is connected at the 110kV three-phase system using power transformers. We, the authors, present in this paper the currents and voltage variation waveforms for the mono-phase and three-phase circuits of a DC traction locomotive. We traced the variation of the waveforms and electrical parameters at variable loading of the traction motors.