T8: Small-Signal Modeling and Stability Analysis of Grid-Converter Interactions

4:10PM - 6:00PM
Monday, June 3rd, 2019

Xiongfei Wang
Aalborg University, Denmark



Power electronic converters are increasingly found in ac power grids, e.g. renewable energy generations, flexible ac/dc power transmissions, and energy-efficient power consumptions. As the number of grid-connected converters increases, the converter-grid interactions tend to bring in a number of stability and power quality challenges. This tutorial thus provides a systematic discussion on the small-signal modeling and dynamic analysis of grid-connected converters, considering both grid-forming and grid-following operations. A critical review of mathematical foundations for the multi-frequency small-signal models of ac power converters will be discussed. The impedance modeling and stability analysis of grid-converter interactions will be presented, and the influences of different control loops will be characterized with case studies. Prospects and challenges on the model validation and system stability analysis will conclude the tutorial.



Xiongfei Wang is a Professor and Research Program Leader for Electronic Power Grid (eGrid) with the Department of Energy Technology, Aalborg University, Denmark. His research interests include modeling and control of grid-interactive converters, stability and power quality of power-electronic-based power systems, active and passive filters. He has delivered tutorials at a few IEEE conferences/workshops, e.g. APEC, ECCE, PEDG, EPE, eGrid, PEAC, etc.

In 2016, Dr. Wang was selected into Aalborg University Strategic Talent Management Program, which aims at developing next-generation research leaders for Aalborg University. He received six IEEE prize paper awards in both Transactions and conferences, the outstanding reviewer award of IEEE Transactions on Power Electronics in 2017, and the IEEE PELS Richard M. Bass Outstanding Young Power Electronics Engineer Award in 2018. He serves as the Associate Editor for the IEEE Transactions on Power Electronics, the IEEE Transactions on Industry Applications, and the IEEE Journal of Emerging and Selected Topics in Power Electronics.