Energy-Efficient Emplacement of Reversible DC Traction Power Substations in Urban Rail Transport through Regenerative Energy Recovery

Due to the high potential of urban rail transport systems as an effective solution to improve urban mobility services, these systems have faced an increasing demand in recent years. High capacity, reliability and absence of local emissions are some of the most promising advantages of these transportation systems. However, with the increase in capacity demands, energy costs and environmental concerns, and in a highly competitive context where other modes of urban transportation are improving technical and also economic aspects of their services along with their environmental performance, urban rail must be more energyefficient while improving its quality of service. In this paper, an energy-efficient method through different scenarios using regenerative braking and reversible substations has been proposed and tested on a typical metro line. This paper concludes that the energy consumption in simulated metropolitan subway line could be reduced up to nearly 33% through the use of regenerative energy recovery approach and implementation of reversible substations for different scenarios.