High-Gain DC-DC Conversion for Parallel Photovoltaic Arrays


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)


Electrical and Computer Engineering


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


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)

978-1467343541; 978-1467343558

International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version


File Type





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

Publication Date

01 Mar 2013