TY - GEN
T1 - Virtual Friction
T2 - 23rd IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2022
AU - Reissner, Florian
AU - Mallemaci, Vincenzo
AU - Mandrile, Fabio
AU - Bojoi, Radu
AU - Weiss, George
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Virtual synchronous machines (VSMs) are a promising technology to integrate distributed energy sources and storage into power grids. The VSM is a power converter that emulates the behavior of a synchronous machine, providing grid services which are necessary to operate a power system in a stable manner. When more VSMs are connected to the same grid, sub-synchronous oscillations between them (and between VSMs and other generators) may occur if damping coefficients and inertias are not properly tuned. For this purpose, virtual friction (VF) has been proposed to provide high damping without a strong coupling of frequency deviation and power output, unlike for frequency droop. VF applies a damping torque to the virtual rotor of the VSMs, proportional to the deviation of the rotor frequency from the center of inertia (COI)-frequency of the grid. To the best of the authors' knowledge, this technique has only been validated theoretically and in simulations for isolated microgrids. The goal of this paper is to demonstrate the effectiveness of VF both in isolated microgrids and in grid connected operation by experiments on a 45kVA setup and their theoretical assessment.
AB - Virtual synchronous machines (VSMs) are a promising technology to integrate distributed energy sources and storage into power grids. The VSM is a power converter that emulates the behavior of a synchronous machine, providing grid services which are necessary to operate a power system in a stable manner. When more VSMs are connected to the same grid, sub-synchronous oscillations between them (and between VSMs and other generators) may occur if damping coefficients and inertias are not properly tuned. For this purpose, virtual friction (VF) has been proposed to provide high damping without a strong coupling of frequency deviation and power output, unlike for frequency droop. VF applies a damping torque to the virtual rotor of the VSMs, proportional to the deviation of the rotor frequency from the center of inertia (COI)-frequency of the grid. To the best of the authors' knowledge, this technique has only been validated theoretically and in simulations for isolated microgrids. The goal of this paper is to demonstrate the effectiveness of VF both in isolated microgrids and in grid connected operation by experiments on a 45kVA setup and their theoretical assessment.
KW - Frequency synchronization
KW - Islanding
KW - Microgrid
KW - Virtual Friction
KW - Virtual Synchronous Generator
UR - http://www.scopus.com/inward/record.url?scp=85135245408&partnerID=8YFLogxK
U2 - 10.1109/COMPEL53829.2022.9830008
DO - 10.1109/COMPEL53829.2022.9830008
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AN - SCOPUS:85135245408
T3 - Proceedings of the IEEE Workshop on Computers in Power Electronics, COMPEL
BT - 2022 IEEE 23rd Workshop on Control and Modeling for Power Electronics, COMPEL 2022
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 20 June 2022 through 23 June 2022
ER -