Grid Interaction Of a Single-phase Feeder To a Three-phase Converter

Ricardo Q. Machado; Simone Buso; José A. Pomilio

doi:10.18618/REP.2008.4.185192

Authors

Ricardo Q. Machado Department of Electrical Engineering - Avenida Trabalhador São-Carlense, 400 - 13566-59 Sã
Simone Buso Department of Information Engineering - Via Gradenigo 6/B - 35131 Padova Italy
José A. Pomilio School of Electrical and Computer Engineering - P.O. Box 6101 - 13081-970 Campinas Brazil

DOI:

https://doi.org/10.18618/REP.2008.4.185192

Keywords:

Power quality, rural areas, single-phase to three-phase converter, uninterruptible power supply

Abstract

This paper describes the digital control strategy of a line-interactive single-phase to three-phase converter. A typical application may be in rural areas supplied by a single-wire with earth return power system. Due to the evolution of the agricultural and industry, some of the local loads (as electronic power converters, computers, communication equipments, etc.) require, nowadays, high power quality that is intended as sinusoidal, symmetrical and balanced three-phase voltage. In addition to that, to maximize the power absorbed from the feeder, the proposed converter, i.e. a three-phase pulse width modulated voltage source inverter, provides a unity line-side power factor. Differently from the conventional solutions, that uses a single-phase rectifier plus a three-phase inverter, the proposed power converter does not process totally the load power, but only the fraction needed to equalize the system. As it also does not manage active power, it does not necessarily require a DC source at the DC link. The digital control strategy, some design criteria and experimental results are presented.

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Author Biographies

Ricardo Q. Machado, Department of Electrical Engineering - Avenida Trabalhador São-Carlense, 400 - 13566-59 Sã

was born in Santa Maria, Brazil. He received the Bachelor's degree from the University of Santa Maria in 1997, the Master’s (2000) and the Ph.D. (2005) degrees in Electrical Engineering from the University of Campinas, Brazil. From 2002 to 2003 he was a visiting researcher at the University of Padova, Italy and from 2005 to 2007 he was a post-doctorate at the Federal University of Santa Maria. Currently he is professor at the Department of Electrical Engineering of the University of São Paulo/São Carlos and his main research interests are: DC/DC and AC/DC converters, digital control of power converters, power quality, active power filters and renewable energy supplies.

Simone Buso, Department of Information Engineering - Via Gradenigo 6/B - 35131 Padova Italy

was born in Padova, Italy, in 1968. He graduated in electronic engineering at the University of Padova in 1992. He received the Ph.D. in industrial electronics and informatics from the same university in 1997. Since 1993 he co-operates with the power electronics research group of the department of information engineering (DEI) of the University of Padova, where he is currently a "scientific researcher". His main research interests are in the industrial and power electronics fields and are specifically related to: DC/DC and AC/DC converters, smart power integrated circuits, digital control and robust control of power converters, solid state lighting, electro-magnetic compatibility applied to integrated circuits and switch mode power supplies.

José A. Pomilio, School of Electrical and Computer Engineering - P.O. Box 6101 - 13081-970 Campinas Brazil

was born in Jundiaí, Brazil, in 1960. He received the Bachelor's (1983), the Master's (1986) and the Doctoral (1991) degrees in Electrical Engineering from the University of Campinas, Brazil. From 1988 to 1991 he was head of the Power Electronics Group at the Brazilian Synchrotron Laboratory. In 1993 and 2003 he was visiting professor at the University of Padova, and at the Third University of Rome, respectively. He is a Professor at the School of Electrical and Computer Engineering of the University of Campinas, where he teaches since 1984. He was president of the Brazilian Power Electronics Society (2000-2002), member of the Administrative Committee of the IEEE Power Electronics Society (1997-2002). He currently is associated editor of the IEEE Trans. on Power Electronics. His main interests are switching-mode power supplies, power factor correction, and active power filters.

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