Todayâ€˜s innovative technologies for Railway Electrification and Rolling Stock enable anrnenergy-efficient operation of railway vehicles supplied by the overhead contact line. Inrncase there is no possibility to recover the braking energy, an onboard energy storage unitrnallows absorption of this energy for later use. Therefore the energy consumption and thernGreenhouse gases (CO2) emission can be reduced significantly and the operation of suchrnrail vehicles equipped with onboard EES on tracks without overhead contact lines isrnpossible. However, the energy storage systemâ€˜s capability of powering the train duringrnnormal power supply system failure has been evaluated. East-West line of Addis AbabarnLight Rail has been considered in modelling and simulation. The energy consumption hasrnbeen calculated for the whole line for proper sizing of the onboard energy storage.rnThe analysis of different storage technologies considering their storage capacities chargernand discharge capability has been reviewed and Lithium-ion battery has been modeledrnwith a capacity of 76.5kWh. For the supercapacitor, it is difficult to be used alone due to arnhigher weight to be added on the train since onboard energy storage is preferred in therndesign. Thus, the combination of batteries and Supercapacitor modules has been modelled.rnThe supercapacitor is used for quick exchange of power between the supply and the trainrn(power efficiency) while Lithium-ion battery is used for energy efficiency. A powerrnconversion system using bidirectional DC-DC converter for the charge and discharge andrnenergy management system is used for the realisation of catenary free system.rnThe simulation results from Matlab Simulink show that to supply the train with therntraction energy of 10.325kWh, the battery state of charge fall down to 99.9% from fullyrncharged capacity. On the other hand the state of charge of the supercapacitor technology isrn92% and recharged to 99%. The ESS supplies 640kW of power for acceleration time inrnthe simulation. Energy storage technologies are effective solution to recover thernregenerated energy and power the train during an emergency. The energy storage systemrnis recharged during stops at stations and by the use of available braking energy.