A Grid Connected PV Array and Battery Energy Storage Interfaced EV Charging Station

In this work, a charging station for electrical vehicle (EV) integrated with a battery energy storage (BES) is presented with enhanced grid power quality. The positive sequence components (PSCs) of the three phase grid voltages are evaluated for the estimation of the unit templates (UTs) and the reference grid currents. The EV and BES are connected at dc link using a bidirectional buck-boost converter. During the daytime, EV takes power from the solar array, while in its absence, it consumes the power from the grid. Additionally, when the system is connected to the grid, the point of common coupling voltages synchronizes with the voltages of the grid. Tests are conducted on a hardware prototype developed in the laboratory for the validation of the satisfactory response under different dynamics conditions.

Automated summary

This work presents a charging station with a battery energy storage (BES) system, which enhances the power quality of the grid. The positive sequence components of the grid voltages are evaluated to estimate the unit templates and reference grid currents. The electric vehicle (EV) and BES are connected through a bidirectional buck-boost converter, allowing the EV to take power from the solar array during the daytime and from the grid when the solar power is unavailable. Tests conducted on a hardware prototype demonstrate the satisfactory response of the system under different dynamics conditions.