Cascading failure analysis and robustness assessment of the operational system and electric power system based on dependent network

Abstract

In the long-lasting war game, a continuous and stable power supply is of significant importance for giving full play to its superiority. Once the electric power system is attacked, the cascading effect will arise which caused faults to spread within the power network and between operation networks, and eventually lead to large-scale power outages. As a result, the operation loops will rupture and the operational system effectiveness will decline dramatically. In this paper, according to the characteristics of power network and combat network, a cascading failure model of heterogeneous interdependent network considering load characteristics is proposed from the perspective of complex network dependency, and a vulnerability assessment index for electric power system-operation networks(E-O) coupling networks is proposed based on the degree of network survival and operational system effectiveness. Finally, the cascading failure process and vulnerability of E-O coupling networks under different attack strategies are simulated and verified by a modified IEEE 39-bus power system. The results show that the proposed dependent network model of the E-O coupling system can reflect the characteristics and reveal failure rules of the E-O coupling system.