Feedback Linearization Control for a Class of Transformerless Common-Ground VSI

Gabriel de O. Assunção; Ivo Barbi; Daniel J. Pagano

doi:10.18618/REP.2023.4.0026

Authors

Gabriel de O. Assunção Toronto Metropolitan University (TMU), Toronto – ON, Canada https://orcid.org/0000-0003-0414-4936
Ivo Barbi Federal University of Santa Catarina (UFSC), Florianópolis – SC, Brazil https://orcid.org/0000-0002-0917-2779
Daniel J. Pagano Federal University of Santa Catarina (UFSC), Florianópolis – SC, Brazil https://orcid.org/0000-0002-9035-7497

DOI:

https://doi.org/10.18618/REP.2023.4.0026

Keywords:

Feedback linearization control, Inverter topologies, Leakage Current, Transformerless inverter

Abstract

As is well known in practice, conventional transformerless inverters may suffer the risk of high-frequency leakage currents between the photovoltaic (PV) array or battery energy storage systems (BESS) and the ground due to the stray capacitances. This operational condition can generate several electrical problems. Recently, we proposed in [1] a new method for designing transformerless topologies of single-phase voltage source inverters (VSI) with common ground derived from four classical DC-DC converters. As a sequence of that previous work, a novel control technique based on a feedback linearization approach is proposed to control that class of transformerless VSI with common ground in this paper. Unlike the classical local linearization techniques commonly used in the technical literature, this approach allows to obtain large-signal linear equations, by means of the feedback linearization of the non-linear terms. Real-time simulation results using Hardware-in-the-Loop allow validation of the proposed discrete control technique applied to this class of VSI topologies.

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Author Biographies

Gabriel de O. Assunção, Toronto Metropolitan University (TMU), Toronto – ON, Canada

was born in Londrina, Brazil, in 1988. He received his B.S. degree in electronic engineering and M.S. degree in electrical engineering from the Federal University of Technology – Paraná (UTFPR), Ponta Grossa, Brazil, in 2013 and 2016, respectively, and the Ph.D. degree in electrical engineering from the Federal University of Santa Catarina (UFSC), Florianopolis, Brazil, in 2022. He is currently working as a Postdoctoral Fellow Researcher at the Toronto Metropolitan University (TMU). His research interests include power electronics, rectifiers, inverters, power converters for storage systems, and renewable energy sources.

Ivo Barbi, Federal University of Santa Catarina (UFSC), Florianópolis – SC, Brazil

was born in Gaspar, Santa Catarina, Brazil. 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 in electrical engineering from the Institut National Polytechnique de Toulouse, Toulouse, France, in 1979. He founded the Brazilian Power Electronics Society, the Brazilian Power Electronics Conference, in 1990, and the Brazilian Institute of Power Electronics and Renewable Energy, in 2016. He is currently a Researcher with the Solar Energy Research Center, Florianópolis, SC, Brazil, and a Professor Emeritus of electrical engineering with UFSC. Dr. Barbi was a recipient of the 2020 IEEE William E. Newell Power Electronics Award. He was an Associate Editor for the IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS and the IEEE TRANSACTIONS ON POWER ELECTRONICS for several years.

Daniel J. Pagano, Federal University of Santa Catarina (UFSC), Florianópolis – SC, Brazil

was born in La Plata, Argentina, in 1961. He received the B.Sc. degree in telecommunications engineering from the National University of La Plata, Argentina, in 1985, the M.Sc. degree in electrical engineering from the Federal University of Santa Catarina, Florianópolis, Brazil, in 1989, and the Ph.D. degree in robotics, automation, and electronics from the University of Seville, Seville, Spain, in 1999. He is currently a Full Professor with the Department of Automation and Systems, Federal University of Santa Catarina, Florianópolis, Brazil. From September 2006 to October 2007, he was a Visiting Professor with the Department of Engineering Mathematics, University of Bristol, Bristol, U.K. From January 2016 to December 2016, he was a Visiting Professor with the School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW, Australia. His main research interests include nonlinear dynamical systems, bifurcation analysis, nonlinear control, and power electronics.

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