Modulation Technique Applied for THD Reduction in 3-level Flying Capacitor Multilevel Inverter

Davi R. Joca; Luiz H. S. C. Barreto; Demercil S. Oliveira Jr.; Gustavo A. L. Henn; Ranoyca N. A. L. Silva

doi:10.18618/REP.2014.2.173181

Authors

Davi R. Joca Federal University of Ceará
Luiz H. S. C. Barreto Federal University of Ceará
Demercil S. Oliveira Jr. Federal University of Ceará
Gustavo A. L. Henn Rural Federal University of Semi-Arid
Ranoyca N. A. L. Silva Federal University of Piauí

DOI:

https://doi.org/10.18618/REP.2014.2.173181

Keywords:

Flying capacitor, modulation technique, multilevel inverter, THD analysis, THD reduction

Abstract

This paper introduces a modulation technique for a three-level flying capacitor multilevel inverter applied in THD reduction. The proposed modulation improves power quality, reducing the total harmonic distortion and combining the advantages of two modulation techniques: HE-PWM and CSV-PWM. In order to validate the proposed method, the THD analysis, the loss study and the experimental results are shown concerning a three-level 6 kW 0.92 power factor flying capacitor inverter. The experimental results presented line voltage THD around 42.09% and phase voltage THD around 79.06%.

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Author Biographies

Davi R. Joca, Federal University of Ceará

as born in Fortaleza-CE, Brazil, in 1989. He received B.Sc. and M.Sc. degrees in electrical engineering from Federal University of Ceara (UFC), in 2011 and 2014, respectively, where he is currently working toward the Ph.D. degree in electrical engineering within the Energy and Control Processing Group (OPEC). His research interests are static power converters, multilevel converters and renewable energy applications. M.Sc. Joca is a student member of the Brazilian Power Electronic Society (SOBRAEP).

Luiz H. S. C. Barreto, Federal University of Ceará

was born in Navirai-MS, Brazil. He received the B.Sc. degree in electrical engineering from the Federal University of Mato Grosso, Mato Grosso, Brazil, in 1997, and the MSc. and Ph.D. degrees from the Federal University of Uberlandia-MG, Brazil, in 1999 and 2003, respectively. Since June 2003. he has been with the Electrical Engineering Department, Federal University of Ceara, Fortaleza, Brazil, where he is currently a Professor of electrical engineering. His research interests include high-frequency power conversion, modeling and control of converters, power factor correction, new converter topologies and uninterruptible power system and fuel cell. Dr. Barreto is member of the IEEE Power Electronics Society, the IEEE Industrial Application Society, the IEEE Industrial Electronic Society and the Brazilian Power Electronics Society. He is also a Reviewer for the IEEE Transactions on Power Electronics, the IEEE Transactions on Industrial Electronics, Brazilian Power Electronics (SOBRAEP) Magazine and Brazilian Society of Automatics Magazine.

Demercil S. Oliveira Jr., Federal University of Ceará

was born in Santos, Sio Paulo, Brazil, in 1974. He received the B.Sc. and M.Sc. degrees in electrical engineering from the Federal University of Uberlandia, Brazil, in 1999 and 2001, respectively, and the Ph.D. degree from the Federal University of Santa Catarina, Brazil, in 2004. Currently, he is a Professor in the Group of Power Processing and Control m the Federal University of Ceara and senior member of the IEEE. His interest areas include static power converters, soft commutation and renewable energy applications.

Gustavo A. L. Henn, Rural Federal University of Semi-Arid

was born in Fortaleza, Ceará, Brazil, in 1983. He received M.Sc. and Ph.D. degrees in electrical engineering from Federal University of Ceará, Brazil, in 2008 and 2012, respectively. Currently is a Professor in Rural Federal University of do Semi-Arid. His interest areas include static power converters, renewable energy applications and multilevel converters.

Ranoyca N. A. L. Silva, Federal University of Piauí

was born in Fortaleza, Ceará, Brazil, in 1982. She received the B.Sc. degree in electronic engineering from the University of Fortaleza, Fortaleza, Brazil, in 2006, the M.Sc. and Ph.D. degrees from the Federal University of Ceará, Fortaleza, Brazil, in 2009 and 2013, respectively. She has been a Professor of Electrical Engineering from the Federal University of Piauí, Teresina, Brazil, since 2012, and Researcher at the Group of Power Processing and Control, Federal University of Ceará. Her research interests include static power converters, soft commutation, renewable energy applications and multilevel inverters.

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