High efficiency wide load range buck/boost/bridge photovoltaic microconverter

Richard K. Hester, Christopher Thornton, Sairaj Dhople, Zheng Zhao, Nagarajan Sridhar, Dave Freeman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

42 Scopus citations

Abstract

Series strings of photovoltaic modules with integrated dc-dc microconverters can harvest more energy compared to conventional string-inverter architectures if the arrays are partially shaded or the modules mismatched. This work presents a multi-mode dc-dc converter as a candidate microconverter topology for photovoltaic modules. The topology constitutes a single inductor and four switching devices and can function in either buck, boost or an intermediate bridge mode based on the load. The proposed maximum power point tracking scheme is capable of tracking the true maximum even in partially-shaded PV modules. An experimental prototype demonstrates efficiency above 95 % at 215 W over a load range of 3 A to 7 A.

Original languageEnglish (US)
Title of host publication2011 26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011
Pages309-313
Number of pages5
DOIs
StatePublished - 2011
Event26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011 - Fort Worth, TX, United States
Duration: Mar 6 2011Mar 10 2011

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Other

Other26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011
CountryUnited States
CityFort Worth, TX
Period3/6/113/10/11

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