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Three-port DC-DC converter for stand-alone photovoltaic systems

Lookup NU author(s): Dr Wenping Cao, Dr Bing Ji

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Abstract

© 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.

Publication metadata

Author(s): Hu Y, Xiao W, Cao W, Ji B, Morrow DJ

Publication type: Article

Publication status: Published

Journal: IEEE Transactions on Power Electronics

Year: 2015

Volume: 30

Issue: 6

Pages: 3068-3076

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.

URL: https://doi.org/10.1109/TPEL.2014.2331343

DOI: 10.1109/TPEL.2014.2331343

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