Application of Sliding Mode Technology in PV Maximum Power Point Tracking System

Abstract

The recent upsurge in the demand of PV systems is due to the fact that they produce electric power without hampering the environment by directly converting the solar radiation into electric power. However the solar radiation never remains constant. It keeps on varying throughout the day. The need of the hour is to deliver a constant voltage to the stand-alone system of the variation in temperatures and solar insolation.Here we intend to examine a schematic to draw out maximum obtainable solar power from a PV module for use in a DC application. The concept of Maximum Power Point Tracking is to be implemented which results in appreciable increase in the efficiency of the Photovoltaic System. In this paper, a new MPPT has been developed consisting of a Buck-type dc-dc converter, which is controlled by a micro-controller based unit. Based on the non-linear characteristics of PV, these thesis designs a VSS controller to realize the maximum power output of PV arrays. Comparing to the other techniques used in the past, the use of proposed MPPT control improves the PV system performance.