Design and Analysis of Two-Switch Buck Boost-Flyback Converter for Grid-connected PV-BESS System

Abstract

In the recent decades, the renewable energy resources started gaining much attention from
various stakeholders of the community since these resources can be leveraged to produce energy not compromising the environmental protection. Due to numerous benefits, for instance
low cost and enhanced technology, solar cells have become a desirable phenomenon for realtime users. Various studies have been conducted to invent new inverter topologies for
Photovoltaic (PV)-based electricity generation models. These models undergo huge
transformation in its electricity production stages right starting from conversion of AC input to
DC output. So, it becomes a significant challenge to operate the power system using highefficient output-based converter. In this paper, PV combined with Battery Energy Storage
System are connected to the grid through a novel 2-switch buck-boost flyback converter. The
power from the BESS is extracted using a bidirectional converter. The energy management of
BESS is done with the help of an Adaptive Neuro Fuzzy Inference System whose parameters
are tuned using Equilibrium Optimizer. The proposed flyback topology was analyzed under
three modes on the basis of turn ON and OFF states of semiconductor switches. Leaving aside
the differences in solar irradiance, the proposed flyback converter topology focused only on the
regulation of output load voltage on the path of buck-boost converter option. The authors
modelled the proposed power generation system and simulated the same under
MATLAB/Simulink platform. The proposed power system results were compared with existing
systems using various flyback topologies so as to establish the supremacy of the proposed
topology.