A resilience-oriented restoration model against attacks on cyber-physical power systems

Extreme events such as natural disasters and malicious attacks have become more frequent and caused many blackouts in recent years. There is an urgent need to develop an effective restorative strategy applicable to modern cyber-physical power systems. To this end, an analysis of cyber-physical interdependence is performed at first. Considering the operating constraints of cyber network and the cyber-physical coupling constraints, a novel bi-level attack model is proposed to generate the disaster scenario. With the objective of minimizing the electricity loss over the recovery process, a resilience-oriented restoration model is presented to help the system rapidly recover normal level of performance, featuring the combination of substation reconfiguration and the coordinated repair work on electrical and cyber components considering cyber-physical interdependence. Solution approaches are provided to transform the original nonlinear problems into mixed integer linear programming models which can be solved readily. Case studies are carried out on IEEE RTS-79 system and IEEE 118-bus system. Simulation results prove the advantage and effectiveness of the proposed methods.