Information-Flow-Based Cyber - Physical Testbed for Power System Considering Cyber Contingency

Cyber system, including state prediction and control systems, are playing a more important role in modern power system. On the other hand, the safe operation of power system is depending more on the cyber system, and contingencies on the cyber side may have larger impact on the power system. Therefore, it is necessary to consider the cyber system along with the physical system and co-simulation and security assessment. An information flow-based cyber system model is established to simulate the possible impact of cyber contingencies on the physical system. A testbed system is built, and case study on the automatic voltage control system in IEEE-14 bus system shows that the proposed model can be adopted in cyber-physical co-simulation and show the potential impact of cyber system contingencies on power system operation.