Substation Output Voltage Design Based on Threshold Voltage for Light-load Regenerative Brake Control

抄録

In direct current (DC) electrified railway systems, the substation output voltage serves as the reference voltage applied to the catenary system. Increasing the substation output voltage enhances the traction performance of vehicle traction motors, thereby reducing traction time and overall energy consumption. Conversely, reducing the substation output voltage hinders the train's voltage reaching the operating voltage required for light-load regenerative brake control. This can lead to an increase in unutilized regenerative energy. Therefore, a trade-off exists between energy-saving effectiveness. This study investigated the trade-off between the substation output voltage and the threshold voltage for light-load regenerative brake control and devised a method for determining the optimal substation output voltage.