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Energy Storage Management in Support of Trolleybus Traction Power Systems

This paper presents an energy management strategy for a battery-based stationary energy storage system (BESS) capable of supporting the operation of trolleybus power networks while adhering to the DC network's current and voltage requirements, as well as considering the limitation of the C-Rate, to avoid stress on the battery itself. This work also proposes the dimensioning of this BESS and the comparison of different battery capacities based on a Matlab/Simulink-based model able to simulate a one-day operation of the transit trolleybuses. This manuscript illustrates the effect of the proposed management and the chosen battery through comparisons of the voltage and current profiles along the line. The simulation results show an increase in the voltage level and a decrease in the line current along the catenary with the use of the BESS, indicating that the battery can be a solution to improve the operation of trolleybus systems, even though it is not usually used for this type of network.