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@article{Javaid:2025:10.1109/TPWRS.2025.3588893,
author = {Javaid, MS and Chaudhuri, B and Teng, F and Akhtar, Z},
doi = {10.1109/TPWRS.2025.3588893},
journal = {IEEE Transactions on Power Systems},
title = {EMT−RMS modeling trade-off for IBR-driven sub-synchronous oscillations},
url = {http://dx.doi.org/10.1109/TPWRS.2025.3588893},
year = {2025}
}
TY - JOUR
AB - Low-frequency electromechanical oscillations (<2Hz) are time-separated from faster network dynamics, allowing network dynamics to be safely neglected in positive-sequence RMS (RMS+) studies. However, with increasing shares of inverter-based resources (IBRs), sub-synchronous oscillations (SSOs) occur at higher frequencies (>5 Hz) within the electromagnetic timescales. The shift challenges using RMS+ tools for planning IBR-dominated grids, as the time-scale separation is no longer as distinct as in synchronous machine-based systems. This paper demonstrates that relying on RMS+ studies in high-IBRscenarios can lead to erroneous conclusions about SSO, including a false assurance of stability. We explain how the interaction between IBR control and network dynamics affect the damping of SSO. This highlights the need for EMT-dq with network dynamics in a synchronously rotating reference frame as a middle ground between EMT-abc (point-on-wave) and RMS+ for studying IBR-drivenSSO. EMT-dq is computationally simpler than EMTabcand allows frequency-domain analysis for deeper insightand effective SSO mitigation. This emphasizes the necessity of established (rather than bespoke) EMT-dq tools to quickly screen SSO-prone scenarios for detailed investigation in EMT-abc.
AU - Javaid,MS
AU - Chaudhuri,B
AU - Teng,F
AU - Akhtar,Z
DO - 10.1109/TPWRS.2025.3588893
PY - 2025///
SN - 0885-8950
TI - EMT−RMS modeling trade-off for IBR-driven sub-synchronous oscillations
T2 - IEEE Transactions on Power Systems
UR - http://dx.doi.org/10.1109/TPWRS.2025.3588893
UR - https://ieeexplore.ieee.org/document/11082650
ER -
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