Energy Saving of a DC Railway System by Applying Inverting Substations

This paper presented energy saving at a traction substation in a DC railway system with an inverter installed. This study was performed by assuming four headway operations (5 min, 7 min, 9 min and 11 min). The simulation results were obtained with information of MRT purple line Bangkok, Thailand. From the results it presented that the headway is one of the most significant factors on the inverting system. The rectified energy of the non-inverting system is higher than that of the inverting system. Remarkably, the substation and transmission losses of the inverting system are higher than those of the non-inverting system.