Title

High-Gain DC-DC Conversion for Parallel Photovoltaic Arrays

Abstract

A new approach to photovoltaic (PV) arrays is proposed based on a parallel connection scheme. In a series-connected array, differing insolation due to shading or obstructions causes disproportionate reduction in power output. Because operating voltage is governed more by temperature than by insolation, a parallel-connected array is much more robust to the shading effect. Direct paralleling is inappropriate due to the low voltage of a conventional PV module. Therefore, high-gain dc-dc converters are introduced in the proposed system. Three converter types are discussed. Two use transformers to increase gain and one uses a tapped inductor. Experimental results validate the concept and demonstrate tracking accuracy up to 99.87% despite a 39% difference in insolation, and weighted efficiency of up to 92.9%.

Meeting Name

28th Annual IEEE Applied Power Electronics Conference and Exposition (2013: Mar. 17-21, Long Beach, CA)

Department(s)

Electrical and Computer Engineering

Sponsor(s)

National Science Foundation (U.S.)
California Energy Commission. Energy Innovations Small Grant Program

Comments

This work was supported in part by the National Science Foundation under award ECCS-0900940 and in part by the California Energy Commission through their Energy Innovations Small Grant program, award 56086A/0822.

Keywords and Phrases

DC-DC Conversion; Operating Voltage; Parallel Connections; Parallel-Connected; Photovoltaic Arrays; Series-Connected; Tapped Inductor; Tracking Accuracy; DC-DC Converters; Electric Connectors; Incident Solar Radiation; Photovoltaic Cells; Power Electronics

International Standard Book Number (ISBN)

9781467343541; 9781467343558

International Standard Serial Number (ISSN)

1048-2334

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2013 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

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