Technical Seminar

Petr Vorobev received his Ph.D. degree in theoretical physics from Landau Institute for Theoretical Physics, Moscow, Russia, in 2010.  Currently, he is an Assistant Professor at the Skolkovo Institute of Science and Technology (Skoltech), Moscow, Russia. Before joining Skoltech, he was a Postdoctoral Associate at the Mechanical Engineering Department of Massachusetts Institute of Technology (MIT), Cambridge. His research interests include a broad range of topics related to power system dynamics and control. This covers low-frequency oscillations in power systems, dynamics of power system components, multi-time scale approaches to power system modeling, development of plug-and-play control architectures for microgrids. 


Abstract—Stability certification of microgrids can be challenging due to the lack of information on exact values of system parameters. Moreover, full-scale direct stability analysis for every system configuration can be economically and technically unjustified. There exists a demand for simple conditions imposed on system components that guarantee the whole system stability under arbitrary interconnections. Most of existing methods are relying on the so-called passivity property which can be difficult to realize by all the system components simultaneously. In the present manuscript we develop an approach for certifying the system stability by separately considering its properties in different regions of frequency domain. We illustrate our method on the case of droop-controlled inverters and show that while these inverters can never be made passive, reasonable stability certificates can be formulated by careful consideration of their input admittance for different frequency regions. We discuss the generalization of the method for different types of microgrid components 

Please find the video of the seminar at YouTube.