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Lookup NU author(s): Dr Wenping Cao,
Dr Bing Ji
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© 2014 IEEE.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.
Author(s): Hu Y, Xiao W, Cao W, Ji B, Morrow DJ
Publication type: Article
Publication status: Published
Journal: IEEE Transactions on Power Electronics
Print publication date: 01/06/2015
Online publication date: 18/06/2014
Acceptance date: 30/05/2014
ISSN (print): 0885-8993
ISSN (electronic): 1941-0107
Publisher: Institute of Electrical and Electronics Engineers Inc.
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