A T-type LLC Resonant DC-DC-AC Three Port Converter
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Keywords:
Three-port converters (TPC), Photovoltaic (PV), Control degrees of freedom (CDF), Dual active Bridge (DAB), Inductor-inductor-capacitor (LLC)Abstract
Three-port converters (TPC) have become a popular study issue over the past few years due to
their potential uses in from renewable sources and battery backup with great power efficiency. This article
proposes a bi-directional three-port T-type LLC resonant DC-DC-AC converter to perform soft switching
on light loads and in a wide voltage ratio range, to reduce reactive circulating current. This research analyzes
the Grid-Connected Photovoltaic (PV) system and battery backup system with the use of a Three-port DC
DC-AC converter (TPC). The purpose of this research is to propose a high-efficiency isolated DC-DC-AC
three-port converter (TPC) for home photovoltaic battery systems. The TPC is developed from a DC-AC
DAB converter. Its DC-side shares the full-bridge design that offers two bi-directional dc ports, but its AC
side permits direct AC-load connection through a T-type half-bridge arrangement. The suggested TPC
enables single-stage power conversion and a significant amount of control degrees of freedom (CDF) while
having a smaller number of components due to shared branch design and T-type architecture. The TPC can
retain high efficiency. The MATLAB/SIMULINK simulation validates the effectiveness of the proposed
topology.
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