Résumé

The increasing charging stations for electric buses in urban areas bring critical challenges to the electricity distribution network. One potential solution is to interconnect a charging station to the urban Electrical DC Railway Network (EDCRN) to design an electrical smart grid. This work develops a charging strategy to ensure that the electric bus can circulate without stop at the bus depot for recharging during the daytime. To minimize the power demand from the EDCRN, the braking energy of urban trains is recovered to recharge electric bus. The battery is added to store more instantaneous braking energies for recharging the bus later, and its storage capacity is properly sized. Moreover, renewable energies are integrated to achieve an environment-friendly urban electric mobility system. The energy management system is formulated to ensure a reliable and efficient operation of the DC railway micro-grid. An energetic simulation model is built for a period of 24 hours by using the Energetic Macroscopic Representation. Critical results are provided to verify the proposed charging strategy.

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