Discovery and Characterization of Cross-Area and Intra-Area SSOs Sensitive to Delay in Droop Control of Grid-Forming Converters
<|reference_start|>Discovery and Characterization of Cross-Area and Intra-Area SSOs Sensitive to Delay in Droop Control of Grid-Forming Converters: Subsynchronous oscillations (SSOs) involving grid-forming converters (GFCs) are in a less familiar territory of power system dynamics. This letter reports a new phenomenon namely cross-area SSOs in grids with 100% droop-controlled GFC-based renewable penetration, which was discovered during our study on evaluating the adequacy of quasistationary phasor calculus (QPC) and space phasor calculus (SPC)-based models in capturing SSOs. We present frequency-domain characterization of such oscillatory modes in addition to intra-area SSOs in grids involving GFCs and study the impact of a delay in power-frequency droop feedback loop in regards to their stability. Electromagnetic transient (EMT) simulations validate our findings.<|reference_end|>
@article{karunaratne2024discovery,
    title={Discovery and Characterization of Cross-Area and Intra-Area SSOs
  Sensitive to Delay in Droop Control of Grid-Forming Converters},
    author={Lilan Karunaratne, Nilanjan Ray Chaudhuri, Amirthagunaraj Yogarathnam,
  Meng Yue},
    journal={arXiv preprint arXiv:2409.09912},
    year={2024},
    archivePrefix={arXiv},
    eprint={2409.09912},
    primaryClass={eess.SY cs.SY}
}