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Zhu, Y., Kocar, I., Bu, S., Xue, T., & Karaagac, U. (2026). Application of frequency-domain fitting and descriptor state-space modeling for the analysis of sub-synchronous oscillations in multi-IBR systems. International Journal of Electrical Power & Energy Systems, 177, 111778 (14 pages). External link
Chen, X., Xue, T., Kocar, I., Bu, S., & Berger, M. (2025). Sustained oscillations of grid-forming IBRs under unbalanced perturbation: Modal analysis and EMT studies. Electric Power Systems Research, 252, 112206 (8 pages). Presented at International Conference on Power Systems Transients (IPST 2025), Guadalajara, Mexico. External link
Chen, X., Haddadi, A., Farantatos, E., Kocar, I., & Bu, S. (2025). Power swing in systems with varying penetration of grid-forming IBRs: protection and dynamics. Protection and Control of Modern Power Systems, 10(4), 116-129. Available
Chen, X., Kocar, I., Bu, S., Farantatos, E., & Haddadi, A. (2025). Comparative Analysis of Negative Sequence Behavior in Grid-Following and Grid-Forming Inverters: Modeling, Control, and Protection. IEEE Transactions on Power Delivery, 40(3), 1730-1742. External link
Chen, X., Bu, S., Haddadi, A., & Kocar, I. (2025). Performance of distance protection under inverter-based resources with IEEE 2800 current injection requirements. IET Conference Proceedings, 2025(1), 577-582. Presented at 18th International Conference on Developments in Power System Protection (DPSP APAC 2025), Hong Kong, China. External link
Zhang, J., Bu, S., Xue, T., Zhu, J., & Kocar, I. (2025). Mechanism analysis of subsynchronous control interactions between full-converter-interfaced generation and a series-compensated network. International Journal of Electrical Power & Energy Systems, 166, 110525-110525. External link
Xue, T., Zhao, M., Kocar, I., Ghafouri, M., Lesage-Landry, A., Bu, S., & Zhu, Z. (2025). Efficient Deep Reinforcement Learning-Based Supplementary Damping Control with a Coordinated RMS Training and EMT Testing Scheme. IEEE Transactions on Power Delivery, 1-14. External link
Chen, X., Bu, S., & Kocar, I. (2025). Grid-Forming IBRs under Unbalanced Grid Conditions: Challenges, Solutions, and Prospects. IEEE Transactions on Sustainable Energy, 16 pages. External link
Karaagac, U., Mahseredjian, J., Gagnon, R., Gras, H., Saad, H., Cai, L., Kocar, I., Haddadi, A., Farantatos, E., Bu, S., Chan, K. W., & Wang, L. (2019). A generic EMT-type model for wind parks with permanent magnet synchronous generator full size converter wind turbines. IEEE Power and Energy Technology Systems Journal, 6(3), 131-141. External link
Karaagac, U., Mahseredjian, J., Gagnon, R., Gras, H., Saad, H., Cai, L., Kocar, I., Haddadi, A., Farantatos, E., Bu, S., Chan, K., & Wang, L. (2020, August). A Generic EMT-Type Model for Wind Parks with Permanent Magnet Synchronous Generator Full Size Converter Wind Turbines [Paper]. IEEE Power & Energy Society General Meeting (PESGM 2020), Montréal, Québec (1 page). External link
