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

Anticipated mass production and integration of plug-in electric vehicles (PEV) in the power system asks for the analysis of the impacts of PEV charging on different aspects of power system operation. This paper presents the analysis of the impacts of PEV charging on the example of a part of a real medium voltage distribution network from the Bosnia and Herzegovina. Three different charging technologies were modelled: slow charging at private charging stations, fast charging at public charging stations and ultrafast charging at DC charging stations. Three charging modes were analysed for slow charging: unregulated, regulated and regulated with Vehicle-to-grid (V2G) intervals. The analysis showed that the charging of PEV´s has negative impacts on the distribution network in terms of the increase of peak load, the increase of energy losses, the negative impact on voltage profiles and the overload of distribution transformers. By regulating the process of PEV charging most of the negative impacts can however be reduced.