Power grid node comprehensive vulnerability index calculation method based on network analytic hierarchy process

Abstract

The invention particularly relates to a power grid node comprehensive vulnerability index calculation method based on a network analytic hierarchy process. The method aims to solve the problem that node structure vulnerability and node state vulnerability are not independent, the node structure vulnerability and node state vulnerability are connected with each other, but a common analytic hierarchy process theoretically requires that the node structure vulnerability and node state vulnerability s are independent of each other, in practical application, the evaluation result of the vulnerability is unreasonable; therefore, the method is based on a network analytic hierarchy process, in the aspect of expert decision making, the mutual relation between the node structure vulnerability and thenode state vulnerability assessment result is considered; the obtained weight is more accurate; and on the other hand, an entropy weight method is utilized to reflect an objective weight value to correct the power grid node structure vulnerability and node state vulnerability weight obtained by the network analytic hierarchy process, so that a comprehensive vulnerability evaluation result of eachnode of the power grid is obtained through calculation, and sorting is carried out to judge weak links existing in the power grid. The method can meet the requirement of power grid node comprehensivevulnerability assessment under the large power grid interconnection background.

Description

technical field [0001] The invention specifically relates to a method for calculating a network node comprehensive vulnerability index based on a network hierarchy analysis method. Background technique [0002] With the continuous development of the electricity market, a large-scale interconnected power grid is gradually formed, the scale of the power grid is continuously expanding, and the efficiency of power transmission is increasing, which puts higher and higher requirements on the safe operation of the power grid. In this case, the sudden failure of the weak links in the power grid will make the safe and stable operation and control of the power grid more complicated and difficult. The comprehensive vulnerability of grid nodes reflects the two aspects of grid node structure vulnerability and state vulnerability, and more comprehensively and scientifically characterizes and evaluates the vulnerability of the grid. [0003] At present, there is no accurate evaluation met...

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Problems solved by technology

[0003] At present, there is no accurate evaluation method between subjective expert opinions and objective data information in the comprehensive vulnerability research of power grid. Its accuracy is not high

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