A computational dynamic analysis of sustainable electric vehicle fast charging station

Abstract

This paper proposes the design and dynamic analysis of a possible topology of Electric Vehicle Fast Charging Station (EVFCS), which interconnects Photovoltaic Generator (PV); Stationary Batteries (SB); DC Bus; Electric Vehicle (EV); Power Switches; DC-DC Power Converters (Buck, Boost, and Bidirectional DC-DC Converter); Bidirectional AC-DC Converter; High Frequency Transformer (HFT); Matrix Converter (MC) and LCL Filter, with the possibility of connecting to the Utility Grid. The Stationary Battery will be charged slowly through the Photovoltaic System in the morning and afternoon hours and by the Utility Grid at night. Later, the Stationary Batteries will be discharged and will charge the Electric Vehicle Battery quickly (about 20-30 minutes) through a Bidirectional DC-DC Converter and through the Utility Grid, but with an effort much less to process high power in short time intervals in the distribution transformers. The power and control projects of the system were performed through calculations and validated by performing simulations. The simulations will be done in MATLAB / Simulink software. Three operating scenarios will be created, where the use or not of the Utility Grid will be analyzed, according to the intermittent of the Photovoltaic Generator, the State-of-Charge (SOC) of the Stationary Batteries and the Electric Vehicle. For this, there will be the management of the power flows that will be performed by Power Switches. The results indicate the effectiveness of the proposed strategies.