In this paper the traction system of an automatic subway isdescribed using four different energetic graphical techniques:Bond-Graph (BG), Energetic Macroscopic Representation (EMR),Power-Oriented Graphs (POG) and Vectorial Bond-Graph (VBG). Theaim of this paper is to highlight the analogies and thedifferences between these modelling techniques in the analysis andsimulation of the considered system
