A Tri-port DC-DC Converter for Bifacial PV Panels Coupled with Energy Storage
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1
Indian Institute of Technology Kharagpur, Kharagpur, India
2
University of Southampton, Southampton, UK
These authors had equal contribution to this work
Power Electronics and Drives 2024;9(Special Section - Renewable Energy Conversion and Energy Storage Systems ):428-445
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ABSTRACT
The power output of photovoltaic (PV) systems, especially bifacial modules, varies due to daily fluctuations in irradiance and
temperature. Maximising the efficiency and power extraction are considered crucial. Hybrid DC off-grid topologies are highly promising
for rural electrification with solar energy and battery backup. These systems, tailored for household appliance use, feature low
semiconductor count, continuous current ports for PV, battery and DC loads, low-voltage levels for PV and battery, voltage regulation
for DC loads, maximum power point tracking (MPPT), proper battery charging and discharging, high-voltage boosting without low-
frequency transformers and reduced power converter stages. However, the existing schemes often lack the above-mentioned critical
features. Hence, this paper proposes a novel three-switch tri-port converter with integrated energy storage for stand-alone bifacial PV
applications, with modelling and experimental validation. The battery serves as an energy storage component, regulating the DC link
voltage for consistency. This paper underscores PV system power optimisation and introduces a novel tri-port converter for stand-alone
bifacial PV setups, emphasising energy storage’s role in voltage regulation.