Hybrid Robust Tri-Level Defense Model Against Multiperiod Uncertain Attacks

Modern power system faces high risks of multi-period uncertain attacks, call for effective countermeasures. In this paper, we propose a hybrid robust tri-level defender–attacker–defender (DAD) model to mitigate the multi-period attack risk by minimizing the expected load loss for the power system. The proposed model integrates the N-K criterion and attack scenario uncertainties to provide a resilient defense strategy. It also considers the optimal allocation of offensive resources during multi periods of an attack to develop a more practical defense to develop a more practical defense strategy. The column-and-constraint generation algorithm is applied to derive its optimal solutions. Extensive case studies using the IEEE RTS79 and RTS96 systems are conducted to validate the effectiveness of the proposed approach.