CPT-Based Control Strategy for a Two-Phase Three-Wire Pv Inverter: a Multifunctional Perspective and a Comprehensive Review

Augusto M. S. Alonso; João H. Oliveira; Danilo I. Brandao; Jakson P. Bonaldo; Helmo K. M. Paredes; Fernando P. Marafao

doi:10.18618/REP.2022.2.0052

Authors

Augusto M. S. Alonso University of São Paulo (USP), São Carlos – SP, Brazil
João H. Oliveira Federal University of Minas Gerais (UFMG), Belo Horizonte – MG, Brazil
Danilo I. Brandao Federal University of Minas Gerais (UFMG), Belo Horizonte – MG, Brazil
Jakson P. Bonaldo Federal University of Mato Grosso (UFMT), Cuiabá – MT, Brazil
Helmo K. M. Paredes São Paulo State University (UNESP), Sorocaba – SP, Brazil
Fernando P. Marafao São Paulo State University (UNESP), Sorocaba – SP, Brazil

DOI:

https://doi.org/10.18618/REP.2022.2.0052

Keywords:

Ancillary services, Conservative Power Theory, two-phase three-wire, Power quality

Abstract

Multifunctional inverters play an important role in electrical grids due to their capability to provide active power conversion from photovoltaic (PV) systems, as well as by concomitantly offering ancillary services that provide grid support and power quality improvement. Although control strategies for such inverters have been extensively explored for applications in single- and three-phase grids, their consideration for the two-phase three-wire topology has been superficially discussed in literature. Thus, first, this paper contributes to the literature by presenting a comprehensive review about the control of power electronic inverters in two-phase three-wire grids. As second contribution, this paper proposed a flexible control strategy based on the Conservative Power Theory capable of adequately synthesizing control references for a PV-based multifunctional inverter operating in a two-phase three-wire grid. Additionally, power quality services can be selectively offered by the inverter to achieve compensation of reactive, harmonic and unbalance current terms, as well as providing reduction in neutral currents. Hardware-in-the-loop experimental results comprising a multifunctional PV inverter under several scenarios of operation are shown to demonstrate and validate the flexibility of the method.

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Author Biographies

Augusto M. S. Alonso, University of São Paulo (USP), São Carlos – SP, Brazil

received the double Ph.D. degree in electrical engineering in 2021 from the Sao Paulo State University (UNESP), Brazil, and from the Norwegian University of Science and Technology (NTNU), Norway. From January to June 2022 he was a Postdoctoral Researcher funded by FAPESP at the University of Campinas (UNICAMP). Currently, he is an Assistant Professor at the Department of Electrical and Computer Engineering from the University of São Paulo (USP/EESC). In 2015 he was with Whirlpool Latin America/IEL/CNPq as an R&D engineer under the InovaTalentos fellowship. In 2019, he was a recipient of the SOBRAEP award for the best M.S. thesis of the year. His main interests are digital control of power converters, microgrid control, power quality, and energy policies. He is a member of IEEE and SOBRAEP.

João H. Oliveira, Federal University of Minas Gerais (UFMG), Belo Horizonte – MG, Brazil

born in 09/21/1989 in Timóteo – MG, received the B.S. degree in electrical engineering in 2014 from Federal University of Viçosa (UFV) and the M.S. degree in 2016 from the Federal University of Minas Gerais (UFMG). Currently, he is a PhD student at UFMG. His main interests are control and reliability of power converters, microgrid control and power quality. He is a member of IEEE.

Danilo I. Brandao, Federal University of Minas Gerais (UFMG), Belo Horizonte – MG, Brazil

received the B.S. degree in control and
automation engineering from UNESP, Brazil, in 2011; the
M.Sc. degree in electrical engineering from UNESP, Brazil,
in 2013; and the Ph.D. degree in electrical engineering from
UNICAMP, Brazil, in 2015. He was a visiting scholar at the
Colorado School of Mines, USA, in 2009 and 2013, a visiting
scholar at the University of Padova, Italy, in 2014, and a guest
professor at the Norwegian University of Science and
Technology, Norway, in 2018 and 2020. He is currently an
assistant professor at the Graduate Program in Electrical
Engineering with the Federal University of Minas Gerais
(UFMG), Brazil. His main research interests are control of
grid-tied converters and microgrids. He is a member of IEEE
and SOBRAEP.

Jakson P. Bonaldo, Federal University of Mato Grosso (UFMT), Cuiabá – MT, Brazil

received the B.S. degree in Electrical
Engineering from the Federal University of Mato Grosso
(UFMT), Cuiabá, Brazil, in 2003. Received the M.S. and the
Ph.D. degrees in Electrical Engineering from the University of
Campinas (UNICAMP), Campinas, Brazil, in 2010 and 2015,
respectively. From 2010 to 2011 he was with Padtec Optical
Components and Systems as Firmware Engineer. From 2013-
2018 he was with Federal University of Technology - Paraná
(UTFPR) as assistant Professor. Since 2018 he is with
Department of Electrical Engineering at Federal University of
Mato Grosso (UFMT) as assistant professor. His current
research interests include power electronics, integration of
distributed energy systems and the control of grid-connected
power converters. He is a member of SOBRAEP.

Helmo K. M. Paredes, São Paulo State University (UNESP), Sorocaba – SP, Brazil

received the B.Sc. degree from
the National University of San Agustin de Arequipa,
Arequipa, Peru, in 2002, and the M.Sc. and Ph.D. degrees
from the University of Campinas, Campinas, Brazil, in 2006
and 2011, respectively, all in electrical engineering. In 2009,
he joined the Power Electronics Group, University of Padova,
Italy, as a Visiting Student. In 2014, he joined the PEMC
Group, University of Nottingham, U.K., as a Visiting Scholar.
In 2018, he joined the ACEPS Group, Colorado School of
Mines, USA, as a Visiting Scholar. Since December 2011, he
has been associated with São Paulo State University
(UNESP), Sorocaba, Brazil, where he is currently an
Associate Professor and the Leader of the Group of
Automation and Integrating Systems (GASI). His research
interests include power quality, power theories, harmonics
propagation, and power electronics applied to renewable
energy systems. He is also a member of IEEE, SOBRAEP and
SBA. He received the Prize Paper Award from the IEEE
TRANSACTIONS ON POWER ELECTRONICS, in 2012.

Fernando P. Marafao, São Paulo State University (UNESP), Sorocaba – SP, Brazil

received the B.S. degree in electrical
engineering from UNESP, Brazil, in 1998, and the M.Sc. and
Ph.D. degrees from UNICAMP, Brazil, in 2000 and 2004,
respectively. In 2002, he joined the Power Electronics Group,
University of Padova, Italy, as a visiting student. In 2013, he
joined the Colorado School of Mines, USA, as a Visiting
Scholar. Since 2005, he has been with UNESP, as an
Associate Professor with the Group of Automation and
Integrating Systems. His current research interests include
smart grid technologies, distributed generation, energy
management, power electronics and power theories. He is a
member of SOBRAEP, SBA and IEEE

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