Grid Connected Microinverter Based on Single Leg Multimode Converter

This paper proposes a novel topology for grid-connected microinverter system. The topology consists of a single-leg multi-mode converter (SLMMC) and a single-phase inverter which form the proposed microinverter. The SLMMC is responsible for regulating the intermediate DC link voltage, charging an internal battery, and managing the power sharing between the source and the battery. Moreover, the single-phase inverter is connected to the intermediate DC link voltage from one side and performs supporting functions on the grid’s side. The proposed topology provides multiple advantages over the existing solutions, including reduced number of components, reduced size, and higher efficiency as the number of required elements reduced. The proposed system is implemented using MATLAB/Simulink, and various investigations are carried out to demonstrate the correctness of the proposed solution.