Authors

Cornelia Skaga, Gilbert Bergna-Diaz

Abstract

In this paper, we adopt an energy perspective to analyze the stability of converter-dominated dc grids under a hierarchical (primary/secondary) optimal control strategy based on distributed communications, and its robustness against cyber-threats. First, we begin by showing that both the decentralized droop-controlled de microgrid, as well as the distributed secondary controller, admit a port-Hamiltonian description. Second, we exploit the fact that the closed-loop system can be interpreted as a lossy-interconection between their (incremental) models to prove stability for the unperturbed system. Third, we analyze the effect of malicious attacks on the (linear) system and robustify the control system such that resilience against cyber threats always is ensured at steady state. Additionally, we show that by adequately tuning the controllers we are able to significantly reduce the attack influence on the desired steady state. Finally, we use time-domain simulations to support our findings in a case study involving a low-voltage DC microgrid.

Citation

BibTeX

@inproceedings{Skaga_2024,
  title={{Cyber-Attack Resilient DC Microgrids Under Distributed Control: An Energy Perspective}},
  DOI={10.23919/ecc64448.2024.10591018},
  booktitle={{2024 European Control Conference (ECC)}},
  publisher={IEEE},
  author={Skaga, Cornelia and Bergna-Diaz, Gilbert},
  year={2024},
  pages={3319--3324}
}

Download the bib file

References

  • Abdolmaleki, B., Simpson-Porco, J. W. & Bergna-Diaz, G. Distributed Optimization for Reactive Power Sharing and Stability of Inverter-Based Resources Under Voltage Limits. IEEE Transactions on Smart Grid vol. 15 1289–1303 (2024) – 10.1109/tsg.2023.3303178
  • Modeling and stability issues of voltage-source converter dominated power systems: A review. CSEE Journal of Power and Energy Systems (2020) doi:10.17775/cseejpes.2020.03590 – 10.17775/cseejpes.2020.03590
  • Abdolmaleki, B. & Bergna-Diaz, G. Distributed Control and Optimization of DC Microgrids: A Port-Hamiltonian Approach. IEEE Access vol. 10 64222–64233 (2022) – 10.1109/access.2022.3183209
  • Sadabadi, M. S. & Gusrialdi, A. On Resilient Design of Cooperative Systems in Presence of Cyber-Attacks. 2021 European Control Conference (ECC) 946–951 (2021) doi:10.23919/ecc54610.2021.9654990 – 10.23919/ecc54610.2021.9654990
  • Sahoo, S., Dragičević, T. & Blaabjerg, F. An Event-Driven Resilient Control Strategy for DC Microgrids. IEEE Transactions on Power Electronics vol. 35 13714–13724 (2020) – 10.1109/tpel.2020.2995584
  • Sahoo, S., Peng, J. C.-H., Mishra, S. & Dragicevic, T. Distributed Screening of Hijacking Attacks in DC Microgrids. IEEE Transactions on Power Electronics vol. 35 7574–7582 (2020) – 10.1109/tpel.2019.2957071
  • Annavaram, D., Sahoo, S. & Mishra, S. Stealth Attacks in Microgrids: Modeling Principles and Detection. 2021 9th IEEE International Conference on Power Systems (ICPS) 1–6 (2021) doi:10.1109/icps52420.2021.9670061 – 10.1109/icps52420.2021.9670061
  • Sadabadi, M. S., Sahoo, S. & Blaabjerg, F. Resilient distributed control strategies in microgrids against cyber attacks. Cyber Security for Microgrids 227–245 (2022) doi:10.1049/pbpo196e_ch11 – 10.1049/pbpo196e_ch11
  • Beg, O. A., Johnson, T. T. & Davoudi, A. Detection of False-Data Injection Attacks in Cyber-Physical DC Microgrids. IEEE Transactions on Industrial Informatics vol. 13 2693–2703 (2017) – 10.1109/tii.2017.2656905
  • Cecilia, A., Sahoo, S., Dragicevic, T., Costa-Castello, R. & Blaabjerg, F. Detection and Mitigation of False Data in Cooperative DC Microgrids With Unknown Constant Power Loads. IEEE Transactions on Power Electronics vol. 36 9565–9577 (2021) – 10.1109/tpel.2021.3053845
  • Gallo, A. J., Turan, M. S., Boem, F., Parisini, T. & Ferrari-Trecate, G. A Distributed Cyber-Attack Detection Scheme With Application to DC Microgrids. IEEE Transactions on Automatic Control vol. 65 3800–3815 (2020) – 10.1109/tac.2020.2982577
  • Sadabadi, M. S., Sahoo, S. & Blaabjerg, F. Stability Oriented Design of Cyber Attack Resilient Controllers for Cooperative DC Microgrids. IEEE Transactions on Power Electronics 1–1 (2021) doi:10.1109/tpel.2021.3104721 – 10.1109/tpel.2021.3104721
  • Zuo, S., Altun, T., Lewis, F. L. & Davoudi, A. Distributed Resilient Secondary Control of DC Microgrids Against Unbounded Attacks. IEEE Transactions on Smart Grid vol. 11 3850–3859 (2020) – 10.1109/tsg.2020.2992118
  • Sadabadi, M. S. Attack-Resilient Distributed Control in DC Microgrids. 2021 European Control Conference (ECC) 503–508 (2021) doi:10.23919/ecc54610.2021.9655002 – 10.23919/ecc54610.2021.9655002
  • Khalil, Nonlinear Control, 1st (2015)