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

Yihua Hu; Weidong Xiao; Wenping Cao; Bing Ji; D. John Morrow

doi:10.1109/TPEL.2014.2331343

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

Yihua Hu, Weidong Xiao, Wenping Cao, Bing Ji, D. John Morrow

Electronic And Electrical Engineering

Research output: Contribution to journal › Article

81 Citations (Scopus)

162 Downloads (Pure)

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. The 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.

Original language	English
Number of pages	10
Journal	IEEE Transactions on Power Electronics
DOIs	https://doi.org/10.1109/TPEL.2014.2331343
Publication status	Published - 2014

Keywords

dc-dc power conversion
maximum power point tracking
phase shift
photovoltaic power system
voltage control

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10.1109/TPEL.2014.2331343

Hu-etal-TPE-Three-Port-DC-DC-converter-for-stand-alone-photovoltaic-systemsAccepted author manuscript, 1.03 MB

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Hu, Y., Xiao, W., Cao, W., Ji, B., & Morrow, D. J. (2014). Three-port DC-DC converter for stand-alone photovoltaic systems. IEEE Transactions on Power Electronics. https://doi.org/10.1109/TPEL.2014.2331343

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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. The 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.",

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N1 - (c) 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works.

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AB - 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. The 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.

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