Analyzing Power Quality Implications of High Level Charging Rates of Electric Vehicle Within Distribution Networks

TL;DR

This paper examines how high charging rates of electric vehicles affect power quality in distribution networks, using a detailed optimization model and case studies to analyze voltage deviations and the influence of solar power and battery costs.

Contribution

It introduces an exact SOCP formulation for ACOPF including EVs and solar units, analyzing the impact of different EV charging levels on power quality.

Findings

High EV charging levels cause voltage deviations in distribution networks.

Solar power availability influences EV charging impact.

Battery degradation costs affect EV charging strategies.

Abstract

This paper investigates the impact of the charging level of high penetration level of Electric Vehicles (EVs) on the power quality of the electricity distribution network. The EV owners tend to charge their EVs as fast as possible. The charging levels of EVs within the distribution network affect the voltage profile of buses of the network. In this paper, an exact Second-Order Cone Programming (SOCP) formulation of the full AC optimal power flow (ACOPF) problem of the distribution network is presented. The network includes solar generation units and EVs as Distributed Energy Resources (DERs). Different charging levels are considered to analyze the impact of EVs on the distribution network. The performance of the proposed model is illustrated for the modified IEEE-33 bus system for different charging levels for EVs. Besides, the impact of available solar power and battery degradation cost of EVs on the distribution network is investigated. It is illustrated that how EV charging will cause voltage deviation challenges for the distribution network.