Comparative Analysis of P&O and FLC based SEPIC Boost Converter for Solar PV Application

Abstract

Due to the increasing atmospheric pollution and electricity demand, it is necessary to limit the use of fossil fuels. Solar energy using Photovoltaic (PV) systems is an appropriate solution for this problem but the output voltage from the photovoltaic system is very low. Many DC-DC converters are available for boosting this voltage. High voltage applications and these converters are not appropriate due to less gain and extreme duty cycle operation. To meet such applications, different types of voltage boosting techniques are used. Maximum power point technique (MPPT) is also required for Solar PV system due to the stochastic behavior of the Solar PV (SPV) panel. The performance of the SPV system mainly depends on the power converter and MPPT method used, so it is necessary to select the appropriate power converter and MPPT method for such application. In this paper, a non-coupled inductor based SEPIC converter is designed for 29V-230V, 200W system using Matlab/ Simulink based on P&O and FLC based MPPT techniques under varying atmospheric conditions to determine the best strategy among them. In addition, the efficiency of this converter is compared with single ended primary inductor converter (SEPIC), Modified SEPIC converter, and boost converter.