Information-Flow-Based Cyber-Physical Power System Unified Modeling and Analysis for Automation Applications in Power Systems

One of the characteristics of modern power systems is the deep coupling of cyber and physics. The cyber system of power system with collection, calculation and control as the core is playing an increasingly important role in the modern power system. From a security point of view, the impact events and extent of cyber security issues on cyber-physical systems are increasing. So it is necessary to combine cyber systems with physical systems for co-analysis and security assessment. This paper establishes a cyber system model based on information flow, constructs a unified model for the cyber-physical power system under different control scenarios, and conducts simulations to analyze the potential impact of cyber system anomalies on the operation of the power system. The simulation results in IEEE-39 nodes AGC system shows the efficiency of our methods.