A High Efficiency Flyback Micro-Inverter for AC-PV Module

Abstract: The current source flyback micro inverter plays a vital role in PV applications. Presently central inverter system is replaced by micro inverter. Micro inverters are small inverters rated to handle the output of a single panel. Many converter topologies have been proposed for the AC-PV modules. Among those, the fly back inverter has been the center of attention because it satisfies the application requirements such as high voltage step-up ratio, galvanic isolation, low volume, high reliability, and provides high efficiency and relatively simple control. This paper proposes an efficient fly back inverter with mppt control. The center tapped transformer is replaced by a two winding transformer to decrease the current losses. Fly back inverter has three modes of operation. They are DCM (Discontinuous conduction mode), BCM(Boundary conduction mode) and CCM (Continuous conduction mode).By using mppt control we can avoid the problems of individual conduction modes. The performance of the proposed model is simulated in MATLAB/ Simulink environment.

Keywords: total harmonic distortion (THD), Transparent Conductive Oxides(TCO),Maximum power point tracking (MPPT),