Hybrid Electric Charging Station with Energy Management under a Weak Grid Scenario

The paper focuses on an energy management system designed for electric vehicle charging stations incorporating photovoltaic integration, particularly in weak power grids. This study aims to develop a hybrid charging facility for electric vehicles in a weak grid. The proposed approach involves integrating both photovoltaic (PV) and grid power sources to optimize energy utilization in different operational scenarios. The charging station employs a Maximum Power Point Tracking methodology to charge the electric vehicle using PV power when it is available. Without PV power, the system automatically adjusts its operation modes accordingly. The power flow among the PV panels, EV charging station, and grid is decisive based on the power availability and demand conditions. In scenarios where the grid is weak, the performance of the power converters in terms of power injection or absorption is significantly affected. To address these challenges, the study focuses on modelling and designing controllers for the various power electronics converters employed in the system.