A High-Power-Density DC-DC Converter for Distributed PV Architectures

In order to maximize the solar energy harvesting capabilities, power converters for photovoltaic (PV) systems have to be designed for high efficiency, accurate maximum power point tracking (MPPT), and voltage/current performance. When many converters are used in distributed PV systems, power density...

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Bibliographic Details
Published in:IEEE journal of photovoltaics 2013-04, Vol.3 (2), p.791-798
Main Authors: Agamy, M. S., Song Chi, Elasser, A., Harfman-Todorovic, M., Yan Jiang, Mueller, F., Fengfeng Tao
Format: Article
Language:English
Subjects:
DC-DC converters
distributed photovoltaic (PV) architectures
Inductors
Insulated gate bipolar transistors
MOSFETs
partial power processing
Silicon
Silicon carbide
silicon carbide devices
Switches
Switching frequency
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Summary:In order to maximize the solar energy harvesting capabilities, power converters for photovoltaic (PV) systems have to be designed for high efficiency, accurate maximum power point tracking (MPPT), and voltage/current performance. When many converters are used in distributed PV systems, power density also becomes an important factor since it allows for simpler system integration. In this paper, a high-power-density string-level MPPT dc-dc converter suitable for distributed medium- to large-scale PV installations is presented. A simple partial power processing topology that is implemented exclusively with silicon carbide devices provides high efficiency and high power density. A 3.5-kW, 100-kHz converter is designed and tested to verify the proposed methods.
ISSN:2156-3381
2156-3403
DOI:10.1109/JPHOTOV.2012.2230217