“Analysis of Decentralized Stability Regions for Inverter-Based Grids” by Andrey Gorbunov (Skoltech) in the frame of the Friday Seminar Series 2022

Dear Colleagues,

The 3rd seminar of the Spring Friday Seminar Series 2022 “Analysis of Decentralized Stability Regions for Inverter-Based Grids” by Andrey Gorbunov (Skoltech, Russia) was given on May 6th.



Power electronics interfaced generation is becoming increasingly widespread in modern power systems, mainly due to the increase in the share of renewable energy sources. Droop-controlled grid-forming inverters are supposed to be core elements of such systems as they provide the necessary regulation. However, the small-signal stability is a significant issue for inverter-dominated grids. It is easy to certify the stability by direct detailed modelling for specific operational parameters, but not for a range of parameters. Moreover, the computation cost of such a brute-force approach grows exponentially with the size of the system and becomes non-feasible already for moderate-size grids with several inverters – a phenomenon noted as the curse of dimensionality. In this talk, I will present the methodology for determining approximate stability boundaries in frequency and voltage droop gains for systems with an arbitrary number of inverters. The method does not require checking the stability of individual operational points within the space, and therefore it is not prone to the curse of dimensionality. In the end, I will also touch on identifying the system inertia using ambient frequency measurements and the estimation of dynamic parameters based on wide-area measurements.

About the author

Andrey Gorbunov received the B.Sc. and M.Sc degrees in applied mathematics and physics from the Moscow Institute of Physics and Technology, Russia, in 2015 and 2017, respectively; and the M.Sc degree in energy systems from the Skolkovo Institute of Science and Technology, Moscow, Russia, in 2017. He is pursuing a Ph.D. degree in electrical engineering at the National University of Singapore. His research interests include power system dynamics and control, low-frequency oscillations in convention

In the following file you will find an introduction and a detailed timetable of Friday Seminar Series: