Analyzing the impacts of charging plug-in electric vehicles in low voltage distribution networks: A case study of utilization of droop charging control system based on the SAE J1772 Standard

Abstract

Despite the significant advantages of Plugin Electric Vehicles (PEVs), the mass charging of PEVs can cause an increase of the peak load demand and worsen the voltage quality specifically in Low Voltage (LV) distribution networks. In this context, different technical approaches and charging control strategies have been proposed. Nevertheless, most of these methods necessitate advanced communication systems. In this work, based on the SAE J1772 standard, initially an interface unit for controlling the charging current of PEVs is introduced. A droop charging control system, which only needs local measurements, is proposed for the AC charging of PEVs. Using the field measurements and existing statistical studies, the PEV charging loads are modelled and the capability of the proposed system is evaluated for an LV test system with different electric loads and high penetration of PEVs. The results of the simulations confirm the feasibility of the proposed method.