Electric power information physical system robustness analysis method based on reachable matrix

Abstract

The invention discloses an electric power information physical system robustness analysis method based on a reachable matrix. The method comprises the following steps: inputting an adjacency matrix Ep of a power network, an adjacency matrix Ec of an information network and a dependency matrix Epc between the power network and the information network; determining an attack node in the power grid, the attack node being the starting point of fault propagation, and deleting fault nodes appearing in the adjacency matrix Ep and the adjacency matrix Ec after fault propagation, an adjacency matrix Ep *, an adjacency matrix Ec * and a dependency matrix Epc * based on the dependency matrix Epc; updating the dependency matrix Epc, and forming an augmented adjacency matrix after attack based on the adjacency matrix Ep *, the adjacency matrix Ec * and the updated dependency matrix Epc *; and calculating a system robustness index after the attack based on the augmented adjacency matrix. According to the invention, the modeling complexity of the mutual coupling network can be reduced, the structural characteristic change of network connection in the system and the dynamic law are clearly and intuitively shown, the complexity of an attack graph is reduced, and understanding and analysis of security personnel are facilitated.

Description

technical field [0001] The invention belongs to the technical field of smart grid, and more specifically, the invention relates to a method for analyzing the robustness of power cyber-physical systems based on reachability matrix. Background technique [0002] The traditional power system dominated by the primary grid has gradually developed into a system in which the power grid and the information network coexist and are closely integrated, that is, the Power Cyber-physical System (PCPS). PCPS introduces advanced information and communication technology. While deepening the integration of information system and power system, it also makes the system face severe security tests, among which system robustness is the primary issue. This is because the failure of the information system will inevitably affect the power system when it is attacked by hackers, and the failure of the power system will cause the relevant information equipment to lose power supply and cause information...

AI Technical Summary

Problems solved by technology

However, this modeling and simulation analysis method based on graph theory is not easy to present the structural characteristics and dynamic laws of complex networks.

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