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PROF. JANAKA EKANAYAKE Prof. J.B. Ekanayake Professor and Head of the Department University of Peradeniya, Sri Lanka Reader Cardiff University, UK Topic: A multi-level voltage control in a PV MicroGrid About the Speaker: Janaka Ekanayake is attached to the Department of Electrical and Electronic Engineering, University of Peradeniya, Sri Lanka as a Professor since April 2013. He is also a visiting Reader at Cardiff University, UK. His main research interests include power electronic applications for power system, renewable energy generation and its integration, and Smart Grids. He has published more than 50 papers in refereed journals, more than 100 conference papers and has also co-authored five books. The key books to which he contributed are: Electric Power Systems (2012), Wiley; Smart Grid: Technology and Applications (2012), Wiley; Distributed Generation (2010), Institution of Engineering and Technology; and Wind Energy Generation: Modelling and Control (2009) Wiley. He is a Fellow of IET and IESL, and a Senior Member of IEEE. He is also an IEEE PES Distinguish Lecturer. He has been a Royal Society and Commonwealth Fellow at the University of Manchester Institute of Science and Technology, UK in 1997 and 2001. He is a member of the Editorial Board of IEEE Transaction on Energy Conversion, IET Renewable Energy journal and Wind Engineer. He was the Organising Vice Chairperson of the First IEEE PES conference of Innovative Smart Grid Technologies, Asia (2012). He served as a consultant to a number of organisations such as Asian Development Bank; International Copper Association; National Microelectronic Institute, UK; Utility Partners Limited, UK; and Gamesa, Spain. About the Speech: Photovoltaic inverters are idling during the night and operates below their capacity in early mornings and late afternoons. In order to enhance the utilization of PV inverter capacity during the above periods, the possibility of using them for voltage control of the network acting as a reactive power compensator is considered. However, Volt/var control through PV inverters is currently considered controversial by many utilities. Some DNOs worry about potential instabilities of automatic control actions of a large number of PV inverters that may be connected to the LV networks. In order to address these concerns, the operation of a cluster of PV inverter in a MicroGrid that is connected to the main grid through a Solid State Transformer (SST) is considered. In a regime with smart meters connected to all the loads in a LV network, it is anticipated that the coordinated control of PV inverters together with the SST can be utilised to overcome possible control instabilities. The controllers for the PV inverter with Volt/var control and SST control are presented. The multi-level voltage control of the MicroGrid is then presented with a case study.