An Integrated Boost-Sepic Higher Static Gain DC-DC Converter for Photovoltaic (PV) Based Micro-Grid Application

Abstract

A new circuit topology is designed for a DC-DC converter. The proposed converter employs a single power switch which integrates a conventional boost with a single-ended primary inductor converter (SEPIC) for photovoltaic (PV) panels. A prototype is developed and implemented for 105 V DC output from 9 V DC input. The performance of the proposed topology was validated using theoretical and practical verification. The results indicated a higher voltage gain of 11.67, low duty-cycle of 0.82 and reduced voltage stress across the components of about 54 V. The circuit can be used for PV panels and other renewable energy resources that require a DC-DC voltage step-up conversion ratio.

Performance Analysis of Solar PV system integrated with SEPIC and ZETA converter

“…When compared to conventional converters, this converter offers a number of advantages, including a constant output current supply, minimal output voltage ripple, and minimal current stress. SEPIC Converter is operated in 2 modes: (i) Continuous Current Mode (ii) Discontinuous Current Mode In [6,7] boost and SEPIC converters were paired. It was found that their pairing provides the reduced value of duty cycle along with the extended voltage gain.…”