Non-isolated enhanced gain of DC-DC converter for DC micro-grid applications

摘要

The direct current (DC) microgrids are gaining reputation over traditional existing as well as centralized alternating current (AC) systems due to the usage of green sources. DC microgrids are categorized by the usage of intermediate DC-DC converter, which acts as power conditioning units. Hence, the selection of a suitable DC-DC converter becomes substantial as the overall system efficiency is strongly dependent on the converter's performance. This article proposes a non-isolated enhanced voltage gain of DC-DC converter for DC micro-grid applications. The proposed circuit comprises two equal values of inductors, two voltage-lift circuits, two diodes and three switches operates under two dissimilar duty cycles, which exhibits a major benefit to enhance the voltage gain. The analysis under steady-state operation of the proposed work under dissimilar duty cycles is carried out in detail. Simulation of the proposed work has been carried out by using MATLAB/SIMULINK software platform. A prototype circuit rating of about 40 V/1.1 kV, 1KW converter model has been designed, and its performance is validated.