Implementation of Distributed Maximum Power Point Tracking for Partially Shaded PV Systems

Abstract

ABSTRACT:In normal MPPT controlling methods, all the PV panels are connected to single MPPT to produce maximum output. If any fault occurs in the PV Panel or less irradiance in some part of the panel (partially shaded PV system) also leads to reduction in power generation. In the proposed system the efficiency is increased for partially shaded PV system by using "distributed" MPPT (DMPPT) technique. In this method each panel is connected separately to separate MPPT. Each MPPT is connected to the Buck-Boost converter to compensate the voltage variation in the different PV panel. Finally all the MPPT's are connected in parallel which increases the power production and efficiency.