Analysis of the impacts of plug-in electric vehicle charging on the part of a real low voltage distribution network

Abstract

Expected increase in plug-in electric vehicle (PEV) sales makes different analysis of their impacts on electricity distribution networks very interesting. This paper analyses the impacts of PEV charging on an example of a real low voltage (LV) distribution network for various PEV penetration scenarios (5 %, 10 %, 20 % and 50 %). Two main charging technologies were modelled: slow charging at private charging stations and fast charging at public charging stations. Two basic charging modes were analysed: unregulated and regulated. The analysis was done in a professional software tool for analysis of LV distribution networks: WINDis. The results have shown that PEV charging can have negative impacts in terms of increased peak load, increase of power losses, overload of transformers and lines, decrease of voltage values and increased voltage asymmetry. It has been shown that the LV network can support regulated slow charging of a large number of PEV's.