Tutorial (24 October)

Topic: Small-signal stability of power systems with multiple electronic power converters

All registered delegates are welcome to join the Tutorial Session at ACEPT.  This takes place on 24 October, 10.30am – 1.00pm, at Simpor Room 4913, Sands Expo and Convention Centre, Marina Bay Sands

Tutorial Presenter

Liu Jinjun (140 x 210px)

Prof Liu Jinjun, University Distinguished Professor of Power Electronics and Director, Power Electronics and Renewable Energy Center, School of Electrical Engineering, Xi’an Jiaotong University


One of the major developing trends of electric power systems, no matter in stand-alone form or in public grid form, is that more and more electronic power converters are adopted for the purpose of power conditioning or performance improving, therefore the name More Electronic Power System (MEPS) has been proposed. This will lead to quite a few technical challenges, one of them being the system stability issue for MEPS, which is caused by the dynamic interactions possibly at frequency even higher than the line frequency and is quite different from stability issue with conventional power grids. A review of existing analytical approaches to deal with this issue is presented, including conventional power system approach and some power electronics background approaches proposed recently. It turns out that the impedance-based approach is an appropriate analytical approach for such stability issue. A review of existing work of impedance-based approach is then delivered, with a more extensive introduction to the work Xi’an Jiaotong University has completed recently. Future work that needs further research efforts will be addressed too.


LIU Jinjun received his B.S. and Ph.D. degrees in Electrical Engineering from Xi’an Jiaotong University (XJTU), China in 1992 and 1997 respectively. He then joined the XJTU Electrical Engineering School as a faculty. In 1997, 1999, and 2010 respectively he participated in technology, professional, and management training programs at Advanced Technology Laboratories Inc. in USA, Milwaukee School of Engineering in USA, and Chinese University of Hong Kong. From late 1999 until early 2002, he was with the Center for Power Electronics Systems at Virginia Polytechnic Institute and State University, USA, as a visiting Scholar. In late 2002 he was promoted to a Full Professor and then the head of the Power Electronics and Renewable Energy Center at XJTU, which now comprises 14 faculty members and 120 graduate students and carries one of the leading power electronics programs in China. He served as an Associate Dean of Electrical Engineering School at XJTU from 2005 to early 2010, and the Dean for Undergraduate Education of XJTU from 2009 to early 2015. He currently holds the position of XJTU Distinguished Professor of Power Electronics, sponsored by Chang Jiang Scholars Program of Chinese Ministry of Education. Dr. LIU coauthored 3 books, published over 200 technical papers in peer-reviewed journals and conference proceedings, holds 25 patents, and received several governmental awards at national level or provincial level for scientific or career achievements and the 2006 Delta Scholar Award. His research interests are power quality control and utility applications of power electronics, and micro-grids for sustainable energy and distributed generation.

Dr. Liu has served as the IEEE Power Electronics Society (PELS) Region 10 Liaison and then China Liaison for 8 years, an Associate Editor for the IEEE Transactions on Power Electronics for 8 years, and starting from 2015 the Executive Vice President membership for PELS. He chaired the Asian Power Electronics Conferences Coordinating Committee from June 2012 to May 2014. He is on Board of China Electrotechnical Society (CES) and was elected to a Vice President of the CES Power Electronics Society in 2013. He is also on the Executive Board and was elected to a Vice President for the China Power Supply Society in 2013. He has served as a Vice Chair of the Chinese National Steering Committee for College Electric Power Engineering Programs since 2013.