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Small Case Study on the Effect of a Wayside Energy Storage in an Urban Railway Grid

In DC-fed, rail-bound local transport vehicles, a considerable part of the braking energy is dissipated via resistors and is thus lost. This applies in particular to poorly connected network sections with low traffic volumes. The use of stationary energy storage devices is one way to increase the energy efficiency in such sections. In this paper we present a small case study on the theoretically achievable effects of such a system considering a real tram line. The considerations are based on simulations and are underpinned by measurement results obtained in direct cooperation with the tram operator.