EV Hosting Capacity in Distribution Networks Considering RES, Grid Limits, and Supraharmonics

This paper addresses the enhancement of electric vehicle hosting capacity (EVHC) of given distribution systems (DS) in the presence of Renewable Energy Sources (RES) generating units. The analysis is performed through a two-step methodology. Step I adopts an iterative procedure to maximize the number of installed electric vehicle charging stations (EVCSs), neglecting, in a first instance, the consideration of the grid limits. Step II determines the number of EVCS in the presence of a RES generation unit, this time considering constraints such as voltage deviation and line congestion. The optimal location of the RES generation unit is ascertained by an extensive procedure. Additionally, supra-harmonic emissions are estimated at each node hosting EVCS as a function of the number of EVCS. As a case study, the proposed methodology and numerical validations are provided to analyze the impact of DG integration on EVHC in the IEEE 69 bus test system.