Special Session 3
Integration of Photovoltaic Systems into Active Distribution Grids: Advanced Topologies and Control Algorithms

Resulting from decrease in installation costs and steady growing installation rates, the solar photovoltaic (PV) systems will become the major renewable technology in the coming years. The non-utility sectors of PV industry are growing remarkably fast and are more resilient to installation price variations. The latter urges deployment of Active Distribution Grids and development of associated technologies. This Special Session will join researchers to discuss issues of costeffective PV integration into distribution grids and emerging technologies needed to facilitate transition to Active Distribution Grids. The latter can mitigate stochastic effects inherent to solar energy, facilitate power flows control between generators and storages, and enable flexible response to consumers demand.

Topics of interest are, but not limited to:

  • High step-up dc-dc converters for PV module and submodule level applications.
  • Transformerless dc-ac inverter topologies for PV string applications.
  • Active power decoupling in single-phase PV applications.
  • High performance maximum power point tracking algorithms.
  • Power flow control and optimization algorithms.
  • Frequency and voltage regulation by grid-connected PV systems.
  • Energy storage systems (including the use of electrical vehicles for this function).
  • Demand generation strategies.
  • Condition monitoring, intelligent protection, fault diagnosis and self-healing.
  • Communications systems and protocols for integration.


Special session Organizers (short bios):

Elizaveta Liivik (IEEE Senior Member, IES member), Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia.
Elizaveta Liivik (SM’18) received Dipl.-Eng, M.Sc. and Ph.D. degrees in Electrical Engineering from the Department of Electrical Drives and Power Electronics, Tallinn University of Technology, Tallinn, Estonia, in 1998, 2000, and 2015, respectively.
She is currently a Researcher at the Department of Electrical Engineering, Tallinn University of Technology. From 2002 to 2007, she was a lecturer in the Department of Electrical Drives and Power Electronics, Tallinn University of Technology. She is the currently Guest Postdoctoral Researcher in Aalborg University from 2017. Her main research interests include impedance-source power electronic converters, renewable energy and distributed generation, as well as control and reliability issues of power electronic converters in active distribution networks. She has authored or co-authored more than 40 research papers and 1 book.

Andrii Chub (IEEE Member, IES Member), Electronics Engineering Department, Universidad Técnica Federico Santa María, Valparaiso 2390123, Chile.
Andrii Chub (S’12–M’17) received the B.Sc. and M.Sc. degrees from Chernihiv State Technological University, Chernihiv, Ukraine, in 2008 and 2009 respectively, and Ph.D. degree from Tallinn University of Technology, Estonia, in 2016.
He is employed as a Research Fellow in the Federico Santa Maria Technical University, Chile, and retains a position of Researcher in the Power Electronics Group of the Tallinn University of Technology, Estonia. Prior to that, he was a Visiting Research Fellow in the Kiel University between January and July 2017.
He has co-authored more than 70 papers and a book chapter on power electronics and applications. In addition, he holds several patents and utility models. His research interests include advanced dc-dc and dc-ac converter topologies, impedance source electric energy conversion technology, renewable energy conversion systems for energy efficient residential buildings, and converter topologies for smart transformer.

Yongheng Yang (IEEE Senior Member, IES Member), Department of Energy Technology, Aalborg University, 9220 Aalborg Ø, Denmark
Yongheng Yang (SM’17) received the B.Eng. degree from Northwestern Polytechnical University, China, in 2009 and the Ph.D. degree from Aalborg University, Denmark, in 2014. He was a postgraduate student at Southeast University, China, from 2009 to 2011. In 2013, he spent three months as a Visiting Scholar at Texas A&M University, USA. Dr. Yang is currently an Associate Professor with the Department of Energy Technology, Aalborg University.
He has been focusing on the grid integration of renewable energies, in particular, photovoltaics, power electronic converter design, analysis and control, and reliability in power electronics. Dr. Yang served as a Guest Associate Editor of the IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS. He is an Associate Editor of the CPSS Transactions on Power Electronics and Applications and the Electronics Letters. Dr. Yang received the 2018 IET Renewable Power Generation Premium Award.