Seven-Level Inverter with Reduced Switches for PV System Supporting Home-Grid and EV Charger

This paper proposes a simple single-phase new pulse-width modulated seven-level inverter architecture for photovoltaic (PV) systems supporting home-grid with electric vehicle (EV) charging port. The proposed includes reduced number of power components and passive elements size, while showing less output-voltage total harmonic distortion (THD), unity factor operation. In addition, the requires control switching strategies compared to recently published topologies. A comparative study was performed compare structure recent topologies based on in circuit, per level, average active switches, THD, operating efficiency as effective parameters performance evaluation. For design validation purposes, numerical analytical models grid-tied solar PV system driven by were developed MATLAB/Simulink environment. evaluated considering grid-integration stand-alone home level-2 AC EV charger (3–6 kW). Compared topologies, utilizes (7 switches) terminal voltage synthesis. An experimental prototype associated controller built tested grid-integrated system. Due lower ON-switches, enhanced 92.86% load current THD 3.43% that follows IEEE standards DER applications.