Design and implementation of a grid connected single phase inverter for photovoltaic system

This paper reports the design procedure and performance evaluation of an improved quality microcontroller based sine wave inverter for grid connected photovoltaic (PV) system. The power interfacing element between the PV energy and electrical grid is the inverter. The electrical energy injected into the grid depends on the amount of power extracted from the PV system and the efficient processing of this power by the inverter. The grid and PV energy synchronization is the challenge of designing the grid connected inverter. The above threats are eliminated by designing microcontroller based control circuits and considering feedback from electrical grid. The implemented inverter demonstrates that it is capable for auto synchronization and satisfactory performance for grid connected PV system.