Distributed Resilient Control of DC Microgrids Under Generally Unbounded FDI Attacks

TL;DR

This paper introduces a novel resilient control strategy for DC microgrids that can withstand generally unbounded cyber-physical attacks, improving security without requiring bounded attack derivatives.

Contribution

It relaxes previous constraints by handling unbounded attack signals, enhancing the resilience of DC microgrids against more sophisticated cyber-physical threats.

Findings

Guarantees bounded convergence under unbounded attacks

Proves stability using Lyapunov techniques

Validates resilience through case studies

Abstract

Due to the nature of distributed secondary control paradigm, DC microgrids are prone to malicious cyber-physical attacks, which could be unbounded to maximize their damage. Existing resilient secondary control methods addressing unbounded attacks require that the first time derivatives of cyber-physical attack signals be bounded. The secondary defense strategy presented in this letter relax such a strict constraint by addressing more generally unbounded attack signals and hence, enhance the resilience of DC microgrids in adversarial environments. Rigorous proofs, based on Lyapunov techniques, show that the proposed method guarantees the uniformly ultimately bounded convergence for both voltage regulation and proportional load sharing under generally unbounded attacks. Comparative case studies further validate the enhanced resilience of the proposed attack-resilient control strategy.