Active Power Filtering Using Solar EV Charger for Residential Application

This paper investigates the application of active power filtering and simultaneous battery charging of solar photovoltaic (PV) based bi-directional electric vehicle charger (EVC) for residential application. With the growth of EVs, the development of EV charging infrastructure and the mitigation of power quality issues is very essential now. In solar PV-based bi-directional EVC, the solar power is utilized for EV battery charging and the surplus power is supplied to home loads, and can also be supplied to utility-grid in grid-connected applications. However, when PV power is insufficient, it enables Grid-to-Vehicle (G2V) mode to consume deficit power from the grid for battery charging and home loads. Additionally, it can also enable Vehicle-to-Grid (V2G) mode, where the EV delivers power to home loads and to the grid from the EV battery. The capability of the bi-directional EVC system can further be extended in harmonic mitigation and reactive power compensation using suitable control. In this paper, the bidirectional power flow and active filtering capabilities of a PV-based bi-directional EVC system are discussed. The fundamental load current component is estimated using an adaptive SLAD algorithm. The EVC system is validated in simulation studies performed in MATLAB/Simulink environment for various operating conditions.