Grid-Tied PV Inverter Based on Interleaved Flyback Converter

Abstract

This paper present, a grid-tied photovoltaic inverter based on the interleaved flyback converter techniques. The interleaved flyback converter is used to maximize the power level, which can efficiently reduce current ripple, reduce the size of the passive component such as inductor and capacitor and reduce overall cost of converter. The existing system contains flyback topology which is used for microinverters at very low power and recently, many researchers have been researched interleaved flyback technique based photovoltaic inverter for high power application using 3 flyback cells. Each flyback cell is designed for 700W and its output is around 2kW. The most important aim of this article is to propose flyback converter by using 2 flyback cells for high power application instead of 3 flyback cells and each flyback cell is designed for 1kW. The output come from PV panel is fluctuating as well as low. So as to maintain constant voltage as well as to extract maximum power from the PV panel, the MPPT technique is employed with this converter. This converter works in discontinuous conduction mode (DCM), It provides the fast dynamic response, easy control, no reverse recovery losses and no turn ON losses. The operation principles are discussed in details. The proposed converter is simulated in MATLAB software.