Power system-oriented network attack damage degree quantification method

Abstract

The invention provides a power system-oriented network attack damage degree quantification method, which comprises the following steps of: constructing a network attack damage degree quantification model based on an attack propagation probability representation method of a community structure; representing a dynamic evolution process of the network attack by propagation of the network attack, constructing a power system penetration dependency attack graph, and determining an attack path set; designing a damage degree quantitative model based on an attack path, determining an attack strategy set by constructing a network attack graph of the power system, respectively designing objective functions of an information layer and a physical layer, and constructing the damage degree quantitative model by taking an attack strategy as a conditional constraint; and finding an optimal strategy from an attack strategy set, and improving an artificial immune algorithm by using a cross recombination operator to enhance the cooperation efficiency between antibodies to realize model solution. According to the method, accurate characterization of the network attack propagation probability in different situations and at multiple angles is realized, numerical representation of potential consequences of the network attack is realized, and the security state of a power system can be accurately grasped.

Description

technical field [0001] The invention relates to the field of electric power cyber-physical systems, in particular to a method for quantifying the damage degree of network attacks oriented to electric power systems. Background technique [0002] The interdependence between the power information network and the physical network is getting closer, and the scope of cyber attacks is no longer limited to the internal propagation of the information network, and may even be transmitted to the physical network through the high coupling of the cyber-physical system, threatening the safe operation of the power system. Experts and scholars in the power industry have analyzed and summarized the causes of power accidents over the years, and found that there are vulnerable links in the information network of the power system, and combined attacks targeting vulnerable links are the cause of blackouts. [0003] Therefore, how to effectively quantify the degree of damage that can be caused is...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for quantifying the degree of network attack damage to power systems, which can solve the problem in the prior art that only analyzes the damage degree of network attacks to power systems for a single attack target, and it is difficult to intuitively grasp the potential consequences of network attacks

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