Detailed Bond Graph Modeling of PV-Battery System

A bond graph modelling of a Photovoltaic system is presented in this study. A Photovoltaic system's four main components are Photovoltaic generator, DC-DC converter, battery, and DC-AC inverter. This study shows the bond graph models of the aforementioned part. A five-parameters PV generator is chosen based on high accuracy and illustrating of the effects of temperature and solar irradiation. To develop a link with reality, the bond graph model is created using the specs of the CS1U-400 Canadian solar module. The effects of different duty cycles have been examined using a bond graph model of a synchronous Boost converter and a synchronous Cuk converter. For a Lead Acid Battery, a novel bond graph model was developed. This model investigates the impacts of temperature and current in charging and discharging scenarios. Finally, a 3-phase inverter bond graph is designed to connect the PV system to the grid. The 20-Sim software is used to simulate the developed models, and the results are discussed.