A Comprehensive Analysis of PI and Fuzzy-Controlled Dual Active Bridge Converter for Renewable Energy-Based Off-Board EV Charging

Abstract

This study examines the design and performance comparison of Proportional-Integral (PI) and Fuzzy Logic Controllers (FLC) for a Dual Active Bridge (DAB) converter, specifically within the framework of solar-integrated off-board fast charging for electric vehicles (EVs). The main goal is to create and assess control strategies that facilitate efficient and stable power transfer between the PV System and the EV battery, effectively managing the challenges associated with fluctuating solar irradiance and changing battery load conditions. The approach includes designing both PI and FLC controllers specifically for the DAB converter and then conducting a simulation-based assessment across various operating conditions. The PI controller is adjusted using traditional tuning methods, whereas the FLC is crafted to handle the system's nonlinearities. The evaluation focuses on key performance indicators such as voltage regulation, response time, and overall system performance. The results indicate that although PI controller performs adequately in steady-state scenarios, the FLC outperforms it in terms of dynamic response, especially when managing disturbances and system uncertainties. Additionally, the FLC improves the overall efficiency of the solar-powered charging system by optimizing power flow amidst fluctuating solar input and load conditions. The innovation of this study is rooted in applying a FLC to a DAB converter within the unique setting of solar-integrated fast charging for EVs, an area that appears underexplored in current literature. The proposed FLC provides a strong solution to the challenges of incorporating renewable energy into fast EV charging systems, contributing to the development of more sustainable and dependable charging infrastructure.