Study of High Step-Up Gain DC-DC Converters Based on Stacking of Non-Isolated Topologies

Ronny G. A. Cacau; Telles B. Lazzarin; Moisés C. T. Villanueva; Ivo Barbi

doi:10.18618/REP.2018.4.0029

Authors

Ronny G. A. Cacau Federal University of Santa Catarina, Department of Electrical Engineering, Florianópolis - SC, Brazil
Telles B. Lazzarin Federal University of Santa Catarina, Department of Electrical Engineering, Florianópolis - SC, Brazil
Moisés C. T. Villanueva National University of San Agustin, Department of Electrical Engineering, Arequipa, Peru
Ivo Barbi Federal University of Santa Catarina, Department of Automation and Systems, Florianópolis - SC, Brazil

DOI:

https://doi.org/10.18618/REP.2018.4.0029

Abstract

This paper approaches the study of stacked DC-DC converters with high step-up gain, using low-voltage devices. The proposed topologies are generated from the stacking of conventional buck-boost structures and they are suitable in applications that a high conversion ratio is required. The stacked converters can also be employed as DC bus to provide one or several output voltage levels with self-balancing, and thus different loads can be connected to one or more capacitors of the stack. A generalized theoretical analysis of the proposed topologies approaching static gain, voltage and current stresses on the main components and power flow analysis is described in this paper. A 1-kW prototype with 100 V input voltage and 400 V output voltage was designed, built and tested. The experimental results corroborate the generalized theoretical analysis and they demonstrate the feasibility of the proposed converters.

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Author Biographies

Ronny G. A. Cacau, Federal University of Santa Catarina, Department of Electrical Engineering, Florianópolis - SC, Brazil

was born in Fortaleza, Brazil, in 1987. He received the B.S. and M.Sc. degrees in electrical engineering from the Federal University of Ceará (UFC), Fortaleza, Brazil, in 2011 and 2014, respectively. He is currently working toward the Ph.D. degree in electrical engineering at the Power Electronics Institute of Federal University of the Santa Catarina (UFSC). His interests include high-voltage dc-dc converters, UPS, and multilevel inverters.

Telles B. Lazzarin, Federal University of Santa Catarina, Department of Electrical Engineering, Florianópolis - SC, Brazil

was born in Criciúma, Brazil, in 1979. He received the B.S., M.Sc., and Ph.D. degrees in electrical engineering from the Federal University of Santa Catarina (UFSC), Florianópolis, Brazil, in 2004, 2006, and 2010, respectively. He is currently an Adjunct Professor with the UFSC. His interests include inverters, parallel operation of inverters, UPS, high-voltage dc-dc converters, direct ac-ac power converters, and switched capacitor converters. Dr. Lazzarin is a member of the Brazilian Power Electronics Society (SOBRAEP), IEEE Power Electronics Society (PELS), and IEEE Industrial Electronics Society (IES).

Moisés C. T. Villanueva, National University of San Agustin, Department of Electrical Engineering, Arequipa, Peru

was born in Arequipa, Peru, in 1964. He received the Dipl.-Ing (M.S.) degree in electrical engineering from the Tashkent State Technical University, Tashkent, Uzbekistan, in 1991 and M.S. degrees in electrical engineering from the National University of San Agustin, Arequipa, Peru, in 1999 and Ph.D. degree from the Federal University of Santa Catarina, Florianopolis, Brazil, in 2012. He is currently a Professor with the National University of San Agustin. His interests include distributed generation and renewable energy sources.

Ivo Barbi, Federal University of Santa Catarina, Department of Automation and Systems, Florianópolis - SC, Brazil

was born in Gaspar, Santa Catarina, Brazil, in 1949. He received the B.S. and M.S. degrees in electrical engineering from the Federal University of Santa Catarina (UFSC), Florianópolis, Brazil, in 1973 and 1976, respectively, and the Dr. Ing. degree from the Institut National Polytechnique of Toulouse, Toulouse, France, in 1979. He founded the Brazilian Power Electronics Society (SOBRAEP) and the Brazilian Power Electronics and Renewable Energy Institute (IBEPE) in 2016. Prof. Barbi is an Associate Editor of the IEEE Transactions on Power Electronics and the IET Electronics Letters.

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