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Geoffrey R. Walker
Researcher at Queensland University of Technology
Publications - 110
Citations - 3692
Geoffrey R. Walker is an academic researcher from Queensland University of Technology. The author has contributed to research in topics: Photovoltaic system & Topology (electrical circuits). The author has an hindex of 17, co-authored 104 publications receiving 3504 citations. Previous affiliations of Geoffrey R. Walker include University of Queensland.
Papers
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Journal ArticleDOI
Cascaded DC-DC converter connection of photovoltaic modules
Geoffrey R. Walker,Paul Sernia +1 more
TL;DR: In this paper, the authors proposed an alternative topology of nonisolated per-panel dc-dc converters connected in series to create a high voltage string connected to a simplified dc-ac inverter.
Evaluating MPPT Converter Topologies Using a Matlab PV Model
TL;DR: In this paper, an accurate PV module electrical model based on the Shockley diode equation is presented, which has a photo-current current source, a single diode junction and a series resistance, and includes temperature dependences.
Proceedings ArticleDOI
Cascaded DC-DC converter connection of photovoltaic modules
Geoffrey R. Walker,Paul Sernia +1 more
TL;DR: In this article, the authors show that a "converter-per-module" approach offers many advantages including individual module maximum power point tracking, which gives great flexibility in module layout, replacement, and insensitivity to shading; better protection of PV sources, and redundancy in the case of source or converter failure.
Proceedings ArticleDOI
PhotoVoltaic DC-DC Module Integrated Converter for Novel Cascaded and Bypass Grid Connection Topologies — Design and Optimisation
TL;DR: In this article, the authors proposed two alternative approaches to integrate a simple non-isolated intelligent dc-dc converter with each PV module to provide the advantages of dc-ac MICs at a lower cost.
Journal Article
Photovoltaic DC-DC module integrated converter for novel cascaded and bypass grid connection topologies - design and optimisation
TL;DR: In this article, a dc-dc converter design based on two interleaved MOSFET half bridges is proposed to provide the advantages of dc-ac MICs at a lower cost.