Feasibility Analysis Of Modified High Gain Single Ended Primary Inductor Converter (SEPIC) Based DC-DC Converter In PV Applications

This paper aims at a modified Single Ended Primary Inductor Converter (SEPIC) based switch mode DC-DC converter, which is appropriate for solar and industrial applications where efficient power conversion at desired voltage gain is required. In order to extract maximum power from PV systems, focusing on maximum power point tracking (MPPT) techniques has no alternative as generated power from PV system fluctuates significantly due to variations in atmospheric temperature and irradiation. Viability of using Perturb & Observe algorithm as MPPT control technique with proposed SEPIC in PV application has been also evaluated in this paper. A comparative simulation has been accomplished using PSIM9 at various duty cycles for both conventional and proposed SEPIC in order to maximize the voltage gain at convenient higher efficiency. Later on, modeling of PV system with Perturb and Observe method for different atmospheric conditions along with proposed SEPIC has also been executed using MATLAB/SIMULINK.