Quantitative Estimation of Railway Vehicle Regenerative Energy Saving: “A Case of Addis Ababa Light Rail Transit (AALRT)”

A rapidly growing demand and shortage of electric energy require mankind to efficiently use it, recuperate store it from the existing system, when possible, for further applications whenever need arises. Electric trains figure among big consumers different railway transportation services; light rail transit are characterized by frequent stoppings entrain detrain passengers. In their operation, traction drives made keep on braking in order meet service requirements between closely spaced passenger stations. The modern system used is regenerative braking, which acts as an generator during period. objective this paper estimate magnitude that can be recuperated a percentage train consumption East-West (Ayat Tolhailoch) West-East (Tolhailoch-Ayat) directions Addis Ababa Light Rail Transit. Mathematical equations have been calculate consumed stations followed quantification at each station. Considering current average running speed (24km/h) line, resulted 26.31% 28.18% respectively saved through recuperation. From above results, was observed strongly depends efficiencies inverter induction motor.