FRACTIONAL-ORDER PID CONTROLLED DER-BASED EV CHARGING STATION WITH SEAMLESS GRID CONNECTION

Abstract

In this paper, we provide a standard DC bus system that can charge EVs from a variety of renewable power sources, such as fuel cells and solar photovoltaics. The integration of distributed energy resources (DERs) derived from renewable energy sources is essential. to provide improved power quality and fulfil the growing need for decarbonization. Because electricity may flow in both directions, electric vehicles (EVs) can charge and discharge in two different ways: when connected to the grid and while operating independently. By using a standard DC bus charging infrastructure, greater voltage rapid charging is made feasible, along with better system stability. To provide reliable operation regardless of grid availability or unavailability, a Fractional Order-PID (FOPID) controller controls the current and voltage. Using the STS-1/0 static transfer switches, the FOPID controller enables seamless mode changes by offering superior dynamic responsiveness, robustness, and flexibility compared to conventional PID. Power quality (PQ) that satisfies IEEE standards is achieved while running on the grid by the integration of FOPIDbased control with an adaptive comb-filter approach. This ensures that critical loads have a steady supply of power with lower harmonics and better PQ. Additionally, the system's performance validation under bad grid situations demonstrates its usefulness in both grid-connected and islandoperated modes.