Digital Control Of A Three-phase Ups

C. H. F. Felix; P. F. Seixas; P. C. Cortizo

doi:10.18618/REP.2007.3.189196

Authors

C. H. F. Felix Centro de Pesquisa e Desenvolvimento em Engenharia Eletrica, UFMG
P. F. Seixas Centro de Pesquisa e Desenvolvimento em Engenharia Eletrica, UFMG
P. C. Cortizo Centro de Pesquisa e Desenvolvimento em Engenharia Eletrica, UFMG

DOI:

https://doi.org/10.18618/REP.2007.3.189196

Keywords:

Digital control, Power quality, State feedback, Uninterruptible Power Systems

Abstract

This paper presents a design methodology for the digital controllers of a three-phase UPS (Uninterruptible Power Supply). Upon a state-feedback control topology, a systematic method for pole placement and determination of controller gains was developed. In order to attest the efficiency of the adopted control scheme, experimental tests were carried out on a 4kVA three-phase on-line UPS, resulting in unity power factor operation of the controlled rectifier and low harmonic distortion of inverter output voltage, even under heavy non-linear loads.

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Author Biographies

C. H. F. Felix, Centro de Pesquisa e Desenvolvimento em Engenharia Eletrica, UFMG

was born in 01/10/1976 in Belo Horizonte-MG, Brazil. He received the B.Sc. and M.Sc. degrees in electrical engineering in 2000 and 2003, respectively, from the Federal University of Minas Gerais. He was an Assistant Professor in the same institution from 2003 to 2005. In 2004, he founded and currently works at Helpo Systems, a company which develops embedded systems and open source and free-software based systems. His interests are real-time embedded systems, free-software and its applications.

P. F. Seixas, Centro de Pesquisa e Desenvolvimento em Engenharia Eletrica, UFMG

was born in 10/04/1957 in Belo Horizonte-MG, Brazil. He received his B.Sc. degree and joined the Electronics Engineering Department at the Federal University of Minas Gerais in 1980, where he is an Associate Professor. In 1983 he received his M.Sc. degree in electrical engineering from the same institution and, in 1988, he received the Ph.D. degree from the Institut National Polytechnique de Toulouse, France. His working field is mainly Power Electronics, with interests in Uninterruptible Power Systems (UPS), Electric Drives and DSP control techniques.

P. C. Cortizo, Centro de Pesquisa e Desenvolvimento em Engenharia Eletrica, UFMG

was born in 26/03/1955 in Belo Horizonte-MG, Brazil. He received the B.Sc. degree and joined the Electronics Engineering Department at the Federal University of Minas Gerais in 1978, where he currently is an Associate Professor. He received the Ph.D. degree in 1984 from the Institut National Polytechnique de Toulouse, France. His working field is Power Electronics, with interests in Uninterruptible Power Systems (UPS), high frequency switching power supplies and DSP control techniques.

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