Analysis Of Active Power Filters Operating With Unbalanced Loads

Leonardo Rodrigues Limongi; Daniel Roiu; Radu Bojoi; Alberto Tenconi

doi:10.18618/REP.2010.3.166174

Authors

Leonardo Rodrigues Limongi Universidade Federal de Pernambuco, Department of Electrical Engineering, Recife-PE, Brazil
Daniel Roiu Politecnico di Torino, Department of Electrical Engineering, Torino-TO, Italy
Radu Bojoi Politecnico di Torino, Department of Electrical Engineering, Torino-TO, Italy
Alberto Tenconi Politecnico di Torino, Department of Electrical Engineering, Torino-TO, Italy

DOI:

https://doi.org/10.18618/REP.2010.3.166174

Keywords:

active power filter, Unbalanced Load, Voltage Loop Control

Abstract

The aim of this paper is to perform an analysis of the shunt Active Power Filter (APF) operating with unbalanced loads. The impact of the load imbalance on the APF performance is mathematically demonstrated and validated with experimental results using a 25 kVA shunt APF prototype. The APF operation in such conditions is affected by the appearance of DC-link voltage ripple at twice the grid frequency. As consequence, the source currents become distorted and the APF performance deteriorates. Based on this fact, a new control scheme is proposed to avoid high voltage ripple in the DC link, without increasing the DC-link capacitance.

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Author Biographies

Leonardo Rodrigues Limongi, Universidade Federal de Pernambuco, Department of Electrical Engineering, Recife-PE, Brazil

was born in Recife, Brazil, in 1978. He received the M.Sc. degree in electrical engineering from the Universidade Federal de Pernambuco, Recife, Brazil, in 2006, and the Ph.D. degree from the Politecnico di Torino, Turin, Italy, in 2009. Since 2010, he has been at the Electrical Engineering Department, Universidade Federal de Pernambuco, where he is currently a Professor of Electrical Engineering. He is the author of more than 20 papers published in international conference proceedings and technical journals. His research interests include the fields of power electronics dedicated to power conditioning systems and distributed generation.

Daniel Roiu, Politecnico di Torino, Department of Electrical Engineering, Torino-TO, Italy

was born in Iasi, Romania, in 1981. He received the M.Sc. degree in electrical engineering from the Technical University “Gh. Asachi” Iasi, Iasa, Romania, in 2005, and a joint Ph.D. degree from the Technical University “Gh. Asachi” Iasi and the Politecnico di Torino, Turin, Italy, in 2009. He is currently a Researcher in the Electrical Engineering Department, Politecnico di Torino. His scientific interests include power electronics devices for power quality improvement and distributed generation interfaces.

Radu Bojoi, Politecnico di Torino, Department of Electrical Engineering, Torino-TO, Italy

received the M.Sc. degree in electrical engineering from the Technical University “Gh. Asachi” Iasi, Iasi, Romania, in 1993, and the Ph.D. degree from the Politecnico di Torino, Turin, Italy, in 2003. From 1994 to 1999, he was an Assistant Professor in the Department of Electrical Drives and Industrial Automation, Technical University of Iasi. In 2004, he joined the Electrical Engineering Department, Politecnico di Torino, as an Assistant Professor. He is the author of more than 60 papers published in international conference proceedings and technical journals. His scientific interests include the design and development of DSP- and FPGA-based advanced control systems in the fields of power electronics, high performance electrical drives, and power-conditioning systems. Dr. Bojoi received the IPEC First Prize Paper Award in 2005.

Alberto Tenconi, Politecnico di Torino, Department of Electrical Engineering, Torino-TO, Italy

received the M.Sc. and the Ph.D. degrees in electrical engineering from the Politecnico di Torino, Turin, Italy, in 1986 and 1990, respectively. From 1988 to 1993, he was with the Electronic System Division of the FIAT Research Center, where he was engaged in the development of electrical vehicle drive systems. He then joined the Department of Electrical Engineering, Politecnico di Torino, where he is currently a Full Professor. He is the author of more than 120 papers published in international journals and conference proceedings. He is a reviewer of international journals and Associate Editor of IEEE Transactions on Industrial Electronics. His fields of interest are high-performance drive design, new power electronic device applications, and nonconventional electric machines development. He has participated both as a designer and as a scientist in many national and European research programs.

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