Verification Test of the Bus Voltage at Electric-railway DC Substations for the Effective Utilization of Regenerative Power

The regenerative power in DC electric railways is generated during braking and is shared between vehicles. The sharing contributes to the reduction of the overall power consumption. When there is no powered vehicle running nearby, a light-load regenerative brake control is activated to prevent overvoltage. In that case, the regenerative power cannot be used effectively. Therefore, an appropriate bus voltage can be set as a means of reducing the light-load regeneration control and increasing the regenerative power.