Analysing energy supply options and grid impacts of concentrated EV charging facilities

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Prikler László
Department of Electric Power Engineering

Electric vehicle batteries have to be recharged either by means of low-charging at home or parking lots or at fast charging stations. Fast chargers may re-charge the battery in less than 15 minutes, but this technology requires a bigger amount of power capacity from the electrical grid. Thus, it is a plausible assumption that these charging stations will be supplied from the medium voltage (MV) grid and will be constructed alongside motorways in a similar way than the gasoline stations exist today.

In the case study going to be presented in the paper, it is supposed that an existing twin gas station would be altered to a fully electric charging station and investigation on the impact of the additional electricity demand onto the supplying MV grid is carried through. The grid model is constructed in the simulation software DIgSILENT Power Factory based on measurement data from the local DSO. Simulations to determine the voltage drop along the lines and the loading of the secondary supply cable between the twin stations are conducted.


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