Josep M. Guerrero received the B.S. degree in telecommunications engineering, the M.S. degree in electronics engineering, and the Ph.D. degree in power electronics from the Technical University of Catalonia, Barcelona, in 1997, 2000 and 2003, respectively. He was an Associate Professor with the Department of Automatic Control Systems and Computer Engineering, Technical University of Catalonia, teaching courses on digital signal processing, field programmable gate arrays, microprocessors, and control of renewable energy. In 2004, he was responsible for the Renewable Energy Laboratory, Escola Industrial de Barcelona. Since 2011, he has been a Full Professor with the Department of Energy Technology, Aalborg University, Aalborg East, Denmark, where he is responsible for the microgrid research program. From 2012 he is also a guest Professor at the Chinese Academy of Science and the Nanjing University of Aeronautics and Astronautics. His research interests is oriented to different microgrid aspects, including power electronics, distributed energy storage systems, hierarchical and cooperative control, energy management systems, and optimization of microgrids and islanded minigrids. Prof. Guerrero is an Associate Editor for the IEEE TRANSACTIONS ON POWER ELECTRONICS, the IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, and the IEEE Industrial Electronics Magazine. He has been Guest Editor of the IEEE TRANSACTIONS ON POWER ELECTRONICS Special Issues: Power Electronics for Wind Energy Conversion and Power Electronics for Microgrids, and the IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS Special Sections: Uninterruptible Power Supplies systems, Renewable Energy Systems, Distributed Generation and Microgrids, andIndustrial Applications and Implementation Issues of the Kalman Filter. He is the past chair of the Renewable Energy Systems Technical Committee of the IEEE Industrial Electronics Society.

Emil Levi  received the M.Sc. and Ph.D. degrees from the University of Belgrade, Belgrade, Serbia, in 1986 and 1990, respectively. From 1982 to 1992, he was with the Department of Electrical Engineering, University of Novi Sad. In May 1992, he joined Liverpool John Moores University, Liverpool, U.K., where since September 2000, he has been a Professor of electric machines and drives.

Dr. Levi is an IEEE Fellow, serves as a Co-Editor-in-Chief of the IEEE TRANSACTION ON INDUSTRIAL ELECTRONICS, as an Editor of the IEEE TRANSACTION ON ENERGY CONVERSION, and as an Editor-in-Chief of the IET Electric Power Applications. He is the recipient of the Cyril Veinott award of the IEEE Power and Energy Society for 2009.

Hector Zelaya De La Parra was born in Mexico City, Mexico, in 1953. He received the B.Sc.degree in electrical engineering from the Universidad Iberoamericana, Mexico City, in 1976, the M.Sc. degree from Loughborough University, Leicestershire,U.K., in 1981, and the Ph.D. degree from Bradford University, Bradford, U.K., in 1987.From 1989 to 1997, he was a member of the Power Electronics and Traction Systems Group, Birmingham University, Birmingham, U.K.

For the past 15 years, he has been with ABB Corporate Research,Västerås, Sweden, where he is currently a Senior Principal Scientist. His current research interests include power electronics, grid connected converters, switched-mode power supplies, motor drives, and control strategies. Dr. Hector Zelaya De La Parra is a Senior Member of the IEEE and a Registered Charter Engineer in the U.K.