A High Step-Up Isolated DC-DC Converter Based on Cascaded Greinacher Voltage Multiplier

Authors

  • Bernardo Andres Federal University of Santa Maria, Santa Maria – Rio Grande do Sul, Brasil
  • Leonardo Romitti Federal University of Santa Maria, Santa Maria – Rio Grande do Sul, Brasil
  • António M. S. S. Andrade Federal University of Santa Maria, Santa Maria – Rio Grande do Sul, Brasil
  • Leandro Roggia Federal University of Santa Maria, Santa Maria – Rio Grande do Sul, Brasil
  • Luciano Schuch Federal University of Santa Maria, Santa Maria – Rio Grande do Sul, Brasil

DOI:

https://doi.org/10.18618/REP.2023.1.0038

Keywords:

Isolated SEPIC, Magnetizing current, Voltage step-up cells

Abstract

High step-up converters are required and used in photovoltaic applications, due to low voltage of photovoltaic modules. In this paper, an isolated dc-dc high step-up SEPIC with a Greinacher voltage quadrupler cell is proposed. It has the advantage of continuous input current, high efficiency, high voltage gain, isolation and demands a single switch, being suitable for low power grid-tie photovoltaic systems. The derivation of converter, the operating principles and steady-state analysis are presented, including the detailed analysis of resonant stage, where the value of primary side capacitor is taken into account. Besides that, effects of transformer winding capacitances on converter operation are investigated. Experimental results on a 37.4/400 V, 50 kHz and 200 W prototype are presented to validate the proposed topology and concept, where the maximum efficiency obtained is 97.75%.

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Author Biographies

Bernardo Andres, Federal University of Santa Maria, Santa Maria – Rio Grande do Sul, Brasil

was born in Cerro Largo, RS, Brazil, in 1992. He received the B.S. and M.S. degrees from the Federal University of Santa Maria (UFSM), in 2015 and 2018, respectively, both in electrical engineering (sub-area Power Electronics). He is currently working toward the Ph.D. degree in electrical engineering at the same university. Since 2012, he has been with the Power Electronics and Control Research Group (GEPOC), Federal University of Santa Maria. His research interests include renewable energy, high-efficient power converters and microinverters.

Leonardo Romitti, Federal University of Santa Maria, Santa Maria – Rio Grande do Sul, Brasil

was born in Frederico Westphalen, Brazil, in 1994. He received the B.S. degree in electrical engineering from the Integrated Regional University of Upper Uruguay and Missions, Frederico Westphalen, Brazil, in 2017 and the M.S. degree in electrical engineering from the Federal University of Santa Maria, Santa Maria, Brazil, in 2021. His research interests include photovoltaic systems, control in power electronics, DC-DC converters, maximum power point tracking methods, and microinverters.

António M. S. S. Andrade, Federal University of Santa Maria, Santa Maria – Rio Grande do Sul, Brasil

was born in Ribeira Grande, Cabo Verde, in 1989. He received the Bachelor of Science degree in automation and control engineering from the University of Caxias do Sul, Caxias do Sul, Brazil, in 2012, and the M.S. and Ph.D. degrees in electrical engineering from the Federal University of Santa Maria, Santa Maria, Brazil, in 2015 and 2018, respectively. Since 2018 he is a professor at UFSM. He serves as an Associate Editor of International Journal of Circuit Theory and Applications and Applied Sciences in the special issue "Renewable and Sustainable Energy Conversion Systems". He serves as a frequent Reviewer of several IEEE Transactions Journals in the area of Power Electronics. He was also selected as Distinguished Reviewer of 2021 by the IEEE Transactions on Power Electronics. His research interests include renewable energy, energy storage systems, DC−DC converters, and microinverters.

Leandro Roggia, Federal University of Santa Maria, Santa Maria – Rio Grande do Sul, Brasil

was born in Santa Maria, Brazil, in 1985. He received the B.S., M.S. and Ph.D. degrees in electrical engineering from the Federal University of Santa Maria, Santa Maria, Brazil, in 2008, 2010 and 2013, respectively. From 2010 to 2013, he was a Professor at Federal Institute of Rio Grande do Sul, Brazil. Currently, he is at Federal University of Santa Maria, where he is a Professor at the Technical Industrial School of Santa Maria and a Researcher in Power Electronics and Control Group (GEPOC) since 2003 and Electrical and Computational Systems Research and Development Group (GSEC) since 2013. His research interests include power electronics, DC-DC converters, energy storage devices, converters for photovoltaic systems, LED drivers, and power factor correction.

Luciano Schuch, Federal University of Santa Maria, Santa Maria – Rio Grande do Sul, Brasil

received the B.S., M.S. and the Ph.D. degrees from the Federal University of Santa Maria (UFSM), in 1999, 2001 and 2007, respectively, both in electrical engineering (sub-area Power Electronics). Since 2009, he has been with the Power Electronics and Control Research Group (GEPOC), Federal University of Santa Maria, where he is currently a Professor and the current dean. His research interests include PV systems, UPS and high performance power converters.

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Published

2023-02-24

How to Cite

[1]
B. Andres, L. Romitti, A. M. S. S. Andrade, L. Roggia, and L. Schuch, “A High Step-Up Isolated DC-DC Converter Based on Cascaded Greinacher Voltage Multiplier”, Eletrônica de Potência, vol. 28, no. 1, pp. 52–62, Feb. 2023.

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Vol. 28 No. 1 (2023)

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Original Papers

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