An Improved Power Controller For A Single Phase Grid Connected Inverter With Root Locus Analysis

Authors

  • Élcio Precioso de Paiva Coordenação Área Indústria, Escola Técnica Federal de Palmas AE 310 Sul Av. NS 10 esq, c/ Av. LO-5A, Centro 77021-090 Palmas, TO
  • João Batista Vieira Jr. Núcleo de Pesquisa em Eletrônica de Potência, Faculdade de Engenharia Elétrica, Universidade Federal de Uberlândia Av. João Naves de Ávila, 2121 – Campus Santa Mônica, 38400 –902 Uberlândia, MG
  • Luís Carlos de Freitas Núcleo de Pesquisa em Eletrônica de Potência, Faculdade de Engenharia Elétrica, Universidade Federal de Uberlândia Av. João Naves de Ávila, 2121 – Campus Santa Mônica, 38400 –902 Uberlândia, MG
  • Valdeir José Farias Núcleo de Pesquisa em Eletrônica de Potência, Faculdade de Engenharia Elétrica, Universidade Federal de Uberlândia Av. João Naves de Ávila, 2121 – Campus Santa Mônica, 38400 –902 Uberlândia, MG
  • Ernane Antônio Alves Coelho Núcleo de Pesquisa em Eletrônica de Potência, Faculdade de Engenharia Elétrica, Universidade Federal de Uberlândia Av. João Naves de Ávila, 2121 – Campus Santa Mônica, 38400 –902 Uberlândia, MG

DOI:

https://doi.org/10.18618/REP.2009.1.017023

Keywords:

Frequency and Voltage Droops, Parallel Connection, Phase Feedback, Sinusoidal PWM Inverters, Small Signal Analysis

Abstract

This paper presents an improved controller for a single-phase inverter connected to the grid, which is based on frequency and voltage droops. A new feedback loop is introduced to increase the system damping. The small signal analysis and root locus plots are presented in order to show the connections between the feedback loop gains and the behavior of the system. Simulation results corresponding to the numerical solution of the nonlinear system equations are presented to validate the small signal analysis. A description of a laboratory prototype and the respective experimental results are also presented to confirm the theoretical analysis.

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Author Biographies

Élcio Precioso de Paiva, Coordenação Área Indústria, Escola Técnica Federal de Palmas AE 310 Sul Av. NS 10 esq, c/ Av. LO-5A, Centro 77021-090 Palmas, TO

was born in Uberlândia-MG, Brazil, in 1967. He received the B. S. degree, the M. S. degree and the Ph.D. degree in Electrical Engineering from Federal University of Uberlândia, Brazil, in 1993, 1995 and 2006, respectively. Presently he works as a teacher at Escola Técnica Federal de Palmas, Tocantins, Brazil. His research interest areas include PWM inverters, Parallel Inverter Connection and DC-DC Converters.

João Batista Vieira Jr., Núcleo de Pesquisa em Eletrônica de Potência, Faculdade de Engenharia Elétrica, Universidade Federal de Uberlândia Av. João Naves de Ávila, 2121 – Campus Santa Mônica, 38400 –902 Uberlândia, MG

was born in Panamá-Go, Brazil, in 1955. He received the B. S. degree in Electrical Engineering from Federal University of Uberlândia, Brazil, in 1980 and the M. S. and Ph.D. degrees from the Federal University of Santa Catarina, Brazil, in 1984 and 1991, respectively. He began working as teacher in Electrical Engineering Department of Federal University of Uberlândia in 1980. He is presently Professor of Electrical Engineering at the Federal University of Uberlândia, Brazil. His research interest areas include high-frequency power conversion, modeling and control of converters, power factor correction circuits and new converters topologies. Dr. Vieira Jr. is member of the SBA and member of the Brazilian Society of Power Electronics (SOBRAEP).

Luís Carlos de Freitas, Núcleo de Pesquisa em Eletrônica de Potência, Faculdade de Engenharia Elétrica, Universidade Federal de Uberlândia Av. João Naves de Ávila, 2121 – Campus Santa Mônica, 38400 –902 Uberlândia, MG

was born in Monte Alegre-MG, Brazil, in 1952. He received the B. S. degree in Electrical Engineering from Federal University of Uberlândia, Brazil, in 1975 and the M. S. and Ph.D. degrees from the Federal University of Santa Catarina, Brazil, in 1985 and 1992, respectively. He is presently Professor of Electrical Engineering at the Federal University of Uberlândia, Brazil. His research interest areas include high-frequency power conversion, modeling and control of converters, power factor correction circuits and new converters topologies. Dr. Freitas is member of the SBA and member of the Brazilian Society of Power Electronics (SOBRAEP).

Valdeir José Farias, Núcleo de Pesquisa em Eletrônica de Potência, Faculdade de Engenharia Elétrica, Universidade Federal de Uberlândia Av. João Naves de Ávila, 2121 – Campus Santa Mônica, 38400 –902 Uberlândia, MG

was born in Araguari-MG, Brazil, in 1947. He received the B. S. degree in Electrical Engineering from Federal University of Uberlândia, Brazil, in 1975 and the M. S. degree in Power Electronics from Federal University of Minas Gerais and Ph.D. degree from Universidade Estadual de Campinas , Brazil, in 1981 and 1989 respectively. Nowadays he is a titular professor of the Electrical Engineering Faculty of the Federal University of Uberlândia, Brazil. His research interest area is Power Electronics, specially Soft-Switching Converters and Active Power Filters. Dr. Farias is member of the SBA and member of the Brazilian Society of Power Electronics (SOBRAEP).

Ernane Antônio Alves Coelho, Núcleo de Pesquisa em Eletrônica de Potência, Faculdade de Engenharia Elétrica, Universidade Federal de Uberlândia Av. João Naves de Ávila, 2121 – Campus Santa Mônica, 38400 –902 Uberlândia, MG

was born in Teófilo Otoni-MG, Brazil, in 1962. He received the B.S. degree in electrical engineering from the Federal University of Minas Gerais, Belo Horizonte, Brazil, the M.S. degree from the Federal University of Santa Catarina, Florianópolis, Brazil, and the Ph.D. degree from the Federal University of Minas Gerais in 1987, 1989, and 2000, respectively. He is currently with the Power Electronics Research Group in Federal University of Uberlândia, Uberlândia, Brazil. His research interests are PWM inverters, power-factor correction, and digital control by microcontrollers and DSPs. Dr. Coelho is member of the Brazilian Society of Power Electronics (SOBRAEP).

References

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Published

2009-02-28

How to Cite

[1]
Élcio P. de Paiva, J. B. V. Jr., L. C. de Freitas, V. J. Farias, and E. A. A. Coelho, “An Improved Power Controller For A Single Phase Grid Connected Inverter With Root Locus Analysis”, Eletrônica de Potência, vol. 14, no. 1, pp. 17–23, Feb. 2009.

Issue

Vol. 14 No. 1 (2009)

Section

Original Papers

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Copyright (c) 2008 Revista Eletrônica de Potência

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This work is licensed under a Creative Commons Attribution 4.0 International License.

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