A Case Study on Modeling Adequacy of a Grid with Subsynchronous Oscillations Involving IBRs
<|reference_start|>A Case Study on Modeling Adequacy of a Grid with Subsynchronous Oscillations Involving IBRs: A case study on modeling adequacy of a grid in presence of renewable resources based on grid-forming converters (GFCs) is the subject matter of this paper. For this purpose, a 4-machine 11-bus IEEE benchmark model is modified by considering GFCs replacing synchronous generators that led to unstable subsynchronous oscillations (SSOs). We aim to: (a) understand if transmission network dynamics should be considered in such cases, (b) revisit the space-phasor-calculus (SPC) in d-q frame under balanced condition that captures such phenomena and lends itself to eigenvalue analysis, and (c) emphasize limitations of such models while underscoring their importance for large-scale power system simulations. Time-domain and frequency-domain results from SPC and quasistationary phasor calculus (QPC) models are compared with electromagnetic transient (EMT)-based simulations. It is shown that models with transmission line dynamics in SPC framework can capture the SSO mode while QPC models that neglect these dynamics fail to do so.<|reference_end|>
@article{karunaratne2024a,
    title={A Case Study on Modeling Adequacy of a Grid with Subsynchronous
  Oscillations Involving IBRs},
    author={Lilan Karunaratne, Nilanjan Ray Chaudhuri, Amirthagunaraj Yogarathnam,
  and Meng Yue},
    journal={arXiv preprint arXiv:2407.09526},
    year={2024},
    archivePrefix={arXiv},
    eprint={2407.09526},
    primaryClass={eess.SY cs.SY}
}