Grid-tie switched inductor with voltage multiplier inverter

This paper presents a novel high gain two-stage inverter for Photovoltaic (PV) applications. First stage consists of very high gain Switched Inductor with Voltage Multiplier (SIVM) dc-dc converter. Construction of the second stage consists of five-switch dc-ac inverter. The proposed converter mainly designed for grid-connected PV applications. The proposed system can do the following functions: boost low dc-input voltage to higher level suitable for grid connection, convert dc-voltage into ac voltage and inject sinusoidal current in phase with the grid voltage. Control of the proposed system is performed using Model Predictive Control (MPC). MPC has some inherent features such as Simple and easy to implement, it can be applied to a great variety of systems. Simple treatment of constraints. Control Algorithm is designed to perform the following functions: extract maximum power from PV module, boost low dc-voltage of PV module and inject sinusoidal current synchronized with the grid voltage.