PV SYSTEM INCREMENTAL CONDUCTANCE MPPT METHOD APPLIED FLYBACK CONVERTER UNDER VARIABLE TEMPERATURE AND IRRADIANCE

Abstract

This paper proposes to Photovoltaic (PV) system with Incremental Conductance (IC) MPPT (Maximum Power Point Tracking) method applied to Flyback converter under variable temperature (25ᵒC-50ᵒC) and irradiance (600W/m2-1000W/m2). The power and voltage of PV panels are nonlinear, they depend on environmental conditions such as temperature and irradiance, changing environment conditions lead to change the power of PV panels, and also change the MPP (Maximum Power Point) of PV panels. There is unique MPP of PV panels at different environment conditions. To operate PV panels at MPP there are many MPPT methods in literature, these methods are differ in same ways like; accuracy, speed, cheapness, easy to implement..etc. In this study IC MPPT method is used because of easy to implement and its good result under variable weather conditions. PV systems are consist of PV panels and DC-DC converters, as a DC-DC converter Flyback converter is used to regulate voltage of PV panel. The maximum power point of PV panel, used in this study, is 75W and the accuracy of MPPT method > 98%, efficiency of system > 94%. The system constructed and analyzed in MATLAB/Simulink and This paper is supported by HÜBAK

Keywords

• PV system, MPPT methods, DC-DC converters, Flyback converters