A Modified Boost-Boost High Gain DC-DC Converter for Photovoltaic (PV) Based Off- Grid Applications

Abstract

This study presents a single switch non-isolated DC-DC converter good for photovoltaic (PV) applications. The proposed topology was constructed using two classical DC-DC boost converters by arranging them in cascade for providing high voltage gain, low duty-cycle, less stress across the semiconductor devices, less size, and low cost. The operating principle and steady-state analysis of an individual component of the proposed topology in continuous conduction mode (CCM) are discussed and the results obtained improved the ones in literatures. The prototype of 120 V DC output voltage with 9 V DC input voltage is implemented and the result obtained validate the simulated result of the proposed converter.

Keywords: DC-DC converter, Photovoltaic (PV), Single switch, High gain, Duty-cycle.