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Title: Three-Port DC–DC Converter for Stand-Alone Photovoltaic Systems
Authors: Hu, Y.
Xiao, W.
Cao, W.
Ji, Bing
Morrow, D. J.
First Published: 18-Jun-2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE), United States
Citation: IEEE Transactions on Power Electronics, 2015, 30(6), pp. 3068-3076
Abstract: System efficiency and cost effectiveness are of critical importance for photovoltaic (PV) systems. This paper addresses the two issues by developing a novel three-port dc-dc converter for stand-alone PV systems, based on an improved Flyback-Forward topology. It provides a compact single-unit solution with a combined feature of optimized maximum power point tracking (MPPT), high step-up ratio, galvanic isolation, and multiple operating modes for domestic and aerospace applications. A theoretical analysis is conducted to analyze the operating modes followed by simulation and experimental work. This paper is focused on a comprehensive modulation strategy utilizing both PWM and phase-shifted control that satisfies the requirement of PV power systems to achieve MPPT and output voltage regulation. A 250-W converter was designed and prototyped to provide experimental verification in term of system integration and high conversion efficiency.
DOI Link: 10.1109/TPEL.2014.2331343
ISSN: 0885-8993
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Engineering

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