Abstract

This paper presents a systematic topological study to derive all possible basic and non-isolated three-port converters (TPCs) using power flow diagrams. Unlike most reported TPCs with one bidirectional port, this paper considers up to two bidirectional ports and provides a comprehensive analytical tool. This tool acts as a framework for all power flow combinations, selection, and design. Some viable converter configurations have been identified and selected for further analysis.

Highlights

  • Power electronic converter is an interface which allows the integration of different energy sources to perform efficient power conversion, fast control, and effective power conditioning [1,2,3,4,5]

  • Different topologies of possible three-port converters should be available to cater for various types of input sources and load ports [9,10,11,12]

  • This paper focuses on providing a systematic topological study to derive all possible configurations of three-port converters (TPCs) with two bidirectional ports in contrast to [15] where the output port was unidirectional

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Summary

Introduction

Power electronic converter is an interface which allows the integration of different energy sources to perform efficient power conversion, fast control, and effective power conditioning [1,2,3,4,5]. Different topologies of possible three-port converters should be available to cater for various types of input sources and load ports [9,10,11,12] These ports could be a unidirectional port, such as a PV energy source, or a bidirectional port, such as battery or DC bus [13,14]. This paper focuses on providing a systematic topological study to derive all possible configurations of TPC with two bidirectional ports in contrast to [15] where the output port was unidirectional. The paper is organised as follows: in Section 2, a brief review of a systematic topological derivation of three-port converters with one bidirectional port.

A Review of Three-Port Configurations
Power Flow of Three-Port Converters
Power Flow Subgraphs
Power Flow Graphs for One Bidirectional Port
Proposed Power Flow Graphs Derivation for Two Bidirectional Port
Circuit Realisation Based on Proposed Power Flow Graphs
Principles of Type I-III-IC Operation
PV and battery to DC bus
Conclusions
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