Power network vulnerability evaluation method based on multiple attack strategies

Abstract

The invention discloses a power system vulnerability evaluation method based on multiple attack strategies. The method comprises the following steps: 1) constructing a power grid model; 2) evaluatingthe importance of nodes in the network from four aspects of node degree, betweenness, local centrality and node fault loss, and completing the formulation of an attack strategy according to the importance of the network nodes; 3) establishing a betweenness virtual flow model to simulate a cascade fault propagation process in a power system; and 4) establishing a vulnerability index based on the betweenness virtual flow model, simulating a network attack by adopting a plurality of attack strategies, and evaluating the vulnerability of the IEEE300 power system network according to the change ofthe vulnerability index. Aiming at the vulnerability of the power network under the condition of various attack strategies, the betweenness virtual flow model and the various attack strategies are established to analyze the performance change of the power grid under the cascade failure. The importance of nodes in a power network can be identified, and decision support is provided for maintenance work of power system managers and power system fault prevention of designers.

Description

technical field [0001] The present invention relates to the field of power network vulnerability and emergency management, in particular to a power network vulnerability assessment method based on multiple attack strategies Background technique [0002] The protection of power system is an important pillar to promote the stable development of social economy and people's livelihood. The damage to the power system will affect many aspects of society, and even the overall infrastructure system in some areas will be paralyzed. In order to prevent the power system network from being damaged, many countries are implementing policies to prevent the occurrence of power system damage events. At the same time, initial small faults in the power grid may cause large-scale network collapse and lead to a large-scale paralysis of the power network. For example, the Italian blackout in 2003, the North American blackout in 2003 and the Indian blackout in 2012 were all initial failures that ...

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Problems solved by technology

At the same time, the initial small faults in the power grid may cause large-scale network collapse and lead to the phenomenon of large-scale paralysis of the power network.

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