Temporal and Spatial Evolution Analysis and Immunization Strategy Research of Power Grid Risk Propagation Based on Complex Network Theory

Based on the theory of complex networks, this paper proposes a novel complex network model for power grids. With the help of the propagation mechanism of infectious diseases, the topology structure is analyzed from the perspective of the network, and the risk propagation process of the power grid is characterized in depth. On this basis, according to the complex network theory, we propose a better immunization strategy named the global immune strategy based on the two-round selection mechanism. This strategy is proposed to prevent the spread of power grid comparing with the classic immunization strategy risks. Finally, according to the proposed theory and effective methods, the IEEE39 node and IEEE118 node systems are simulated to verify the effectiveness of the proposed Immunization method for power grid risk propagation.