Investigating the Impact of Electric Vehicles on the Voltage Profile of Distribution Networks

TL;DR

This paper examines how high levels of electric vehicle adoption, combined with photovoltaic systems, affect voltage stability in distribution networks using advanced optimization models and case studies.

Contribution

It introduces two models for EVs and analyzes their impact on voltage profiles considering different penetration levels and TOU pricing.

Findings

Voltage profiles are significantly affected by EV penetration levels.

Different EV models show varying impacts on voltage stability.

TOU pricing influences voltage profile sensitivity.

Abstract

This paper investigates the impact of high penetration of Electric Vehicles (EVs) on the distribution network in the presence of photovoltaic (PV) systems. Two models for EVs are presented and the voltage profile of buses is investigated considering both models and various penetration levels of EVs within the distribution network. The analysis is conducted by presenting an exact convex relaxed form of the full ACOPF problem of the distribution network with fixed power EVs and presenting the full ACOPF problem of the distribution network with fixed current EVs. The performance of each model is illustrated in the case studies leveraging the modified IEEE 33-bus system and considering time-of-use (TOU) pricing. Besides the sensitivity of voltage profile of buses in the distribution network on the time-of-use prices is investigated in the case studies.