A Comparative Analysis of Voltage Equalizers for Partial Shading Compensation in PV Arrays

Cláudio H. G. dos Santos; Pedro F. Donoso Garcia; Seleme I. Seleme Junior

doi:10.18618/REP.2019.3.0012

Authors

Cláudio H. G. dos Santos Federal Center of Technological Education of Minas Gerais, Divinópolis – MG, Brazil
Pedro F. Donoso Garcia Federal University of Minas Gerais, Belo Horizonte – MG, Brazil
Seleme I. Seleme Junior Federal University of Minas Gerais, Belo Horizonte – MG, Brazil

DOI:

https://doi.org/10.18618/REP.2019.3.0012

Keywords:

comparative analysis, current diverters, Partial Shading, voltage equalizers

Abstract

Partial shading is a problem that affects solar systems not only in their efficiency, but also in its lifetime. As a solution, integrated converters enable mismatched modules to deliver their maximum power. Voltage Equalizers are a type of partial power processing integrated converters, which results in more efficiency. There are many types of voltage equalizers, divided in three different architectures and based in many topologies, i.e. buck-boost, flyback, switched capacitors and voltage multipliers. Thus, in this paper, a comparative analysis of these converters are made, considering reliability and working principle, which is explained through simulation results. At the conclusions are made, pointing which circuit may be the best choice for a voltage equalizer.

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Author Biographies

Cláudio H. G. dos Santos, Federal Center of Technological Education of Minas Gerais, Divinópolis – MG, Brazil

was born in October 05, 1982 in Divinópolis, MG – Brazil. Has received his M.Sc and B.Sc. degrees in Electrical Engineering from CEFET-MG and Doctor in Electrical Engineering from UFMG in Belo Horizonte, Brazil in 2008, 2011 and 2018, respectively. Nowadays, he is a teacher member of de Mechatronics Engineer Department of CEFET-MG, located in St. Álvares Azevedo 400, in Divinópolis, Brazil. He also had same position in the Federal University of Outo Preto, MG – Brazil. His currently research interest is power-qualityrelated issues, solar PV technology, charge stations and electric vehicles.

Pedro F. Donoso Garcia, Federal University of Minas Gerais, Belo Horizonte – MG, Brazil

has graduated inelectrical engineering option in electronics by the Universidade Federal do Rio Grande do Sul – UFRGS in 1981, he received his MSc from the Universidade Federal de Minas Gerais – UFMG and his PhD in Electrical Engineering from the Universidade Federal de Santa Catarina – UFSC in 1986 and 1991 respectively. Currently he is an Associate Professor at the Electronic Engineering Dept.–DELT–UFMG. His research interest include: high efficiency power supply, electronic ballasts and different microgrid aspects, including power electronics and distributed energy-storage systems.

Seleme I. Seleme Junior, Federal University of Minas Gerais, Belo Horizonte – MG, Brazil

was born in Novemeber 03 1955 in Palmas, PR – Brazil. Has graduated in Electrical Engineering from EPUSP at São Paulo in 1977, obtained his M.Sc from UFSC at Florianópolis, in 1985 and his PhD from INPG at Grenoble, France, in 1994. He has made his Post Doctorate at UC Berleley, USA, in 2002. Presently he is an Associate Professor, member of the Electronic Department at the Engineering School, UFMG. His main research interests are power electronics, applied control for static converters, electrical drive systems and electromechanical systems.