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

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7 Author(s)
Agamy, M.S. ; GE Global Res. Center, Niskayuna, NY, USA ; Song Chi ; Elasser, A. ; Harfman-Todorovic, M.
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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.

Published in:

Photovoltaics, IEEE Journal of  (Volume:3 ,  Issue: 2 )