A brief study on the utilization of regenerative power in cases of bus voltage droppage

On a DC electric railway, regenerative power is supplied to and from other vehicles running in the vicinity. However, when other vehicles are not running nearby, the voltage of a train that is conducting regenerative power rises, and regenerative power is throttled to prevent excessive voltage. From the perspective of energy effectiveness, for the test we verified the exchange of regenerative power between vehicles when bus voltage drops. We analyze and report verification results both at normal voltage and at a voltage drop.