Grid Tied Photovoltaic Based Electric Vehicle Charging Infrastructure

Abstract

This paper presents detailed simulation of grid tied photovoltaic (PV) based an electric vehicle (EV) charging infrastructure. The EV charger can work in both modes of power flow i.e., grid to vehicle (G2V) and vehicle to grid (V2G), which can be employed in diverse load power requirement scenarios. The overall system uses various converters at each stage, boost converter for harnessing solar PV power, a bi-directional buck-boost converter for EV charging, and a voltage source converter (VSC) with LCL filter for integrating overall system with the grid. The controlling of DC-DC boost converter for extracting peak power output is done using maximum power point tracking (MPPT) technique. The controller associated with bidirectional buck-boost converter is used for controlling power flow of battery pack. Moreover, the controller of grid side bidirectional AC-DC converter is utilized for controlling DC-link voltage. The system presented in this paper contributes towards maximizing energy output from PV system with perturbation and observation (P&O), uninterrupted EV charging, enhancing grid performance and using EV as a form of energy storage system when required. Extensive simulation for various power flow modes have been performed to verify the aforementioned claims. The overall design and simulation work is executed in MATLAB/Simulink software and results are confirmed for various input conditions.