Cyber-Attack Resilient DC Microgrids Under Distributed Control: An Energy Perspective | IEEE Conference Publication | IEEE Xplore

Cyber-Attack Resilient DC Microgrids Under Distributed Control: An Energy Perspective


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 b...Show More

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.
Date of Conference: 25-28 June 2024
Date Added to IEEE Xplore: 24 July 2024
ISBN Information:
Conference Location: Stockholm, Sweden

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