A Two-Stage Emergency Reconfiguration Strategy for Port Cyber-Physical Systems During Disasters Considering the Marginal Value Quantification of Multi-Service Information Flows

Abstract

With the advancement of digitalization, the port is increasingly dependent on cyber systems to coordinate their multiple service operations, gradually evolving into a port cyber-physical system (PCPS). The deepening cyber-physical integration enhances the vulnerability of ports to extreme disasters. In the event of a cyber-physical failure, the coordinated consideration of information flow restoration and power distribution system reconfiguration is of significant value for maximizing load restoration. To address this challenge, this paper proposes a method for quantifying the marginal value of multi-service information flows to objectively assess the relative importance of each service information flow, with the aim of maximizing the load recovery effect in the event of a disaster. Initially, a coupled cyber-physical collaborative restoration model for the port is developed based on the multi-commodity flow framework. Subsequently, the marginal value of each information flow is quantified by the Shapley value approach, with which the coupled model is decoupled and solved by a two-stage restoration strategy. Finally, within the proposed cyber-physical collaborative restoration model, the case study results validate the effectiveness of the two-stage restoration strategy in terms of both load recovery and solution time.