A Hybrid Maximum Power Point Tracking (MPPT) with Interleaved Converter for Standalone Photo Voltaic (PV) Power Generation System

Abstract

The PV system converts solar energy into electrical energy but the changes in the radiation from sun in varying weather conditions influence the generation of solar power. To provide impedance matching between PV systems and load a dc-dc converter with maximum power point tracking (MPPT) technique is used between PV system and the load. This paper incorporates hybrid P and O (perturb and observe) fuzzy MPPT as a maximum power point tracker in dc-dc converter of a standalone photo voltaic system. For P and O algorithm previous knowledge of the PV array characteristics is not required and its procedure is simple. But the oscillations of the operating point around MPP under steady state conditions and the inability to respond for the rapid changing atmospheric conditions are the drawbacks of this system. In fuzzy logic MPPT system the problems associated are slow transient response and fluctuations in the output power. The hybrid P and O fuzzy system gets rid of the muddles of P and O and fuzzy MPPT systems. The conventional P and O MPPT, fuzzy logic MPPT and P and O fuzzy MPPT methods were applied to interleaved boost converter and their performance in terms of the rising time, oscillating time, output voltage, ripple in output voltage were analyzed using Matlab/Simulink software.