Power distribution network repair ability assessment method based on improved grey clustering

Abstract

The invention relates to a power distribution network repair ability assessment method based on improved grey clustering. The method comprises the steps that S1, the analytic hierarchy process is adopted to establish an assessment indicator system; S2, original indicator values of all electric power companies are collected to obtain an original indicator matrix, and the original indicator values are subjected to dimension removal to obtain a standard indicator matrix; S3, the original indicator matrix is normalized, and weights are established for indicators according to the information entropy theory to obtain an entropy weight matrix; S4, a grey clustering method is adopted to set the number of grey clusters and a whitening weight function, and a saturability matrix corresponding to each grey cluster is calculated; S5, fuzzification operation is performed according to the saturability matrix obtained in the step S4 and the entropy weight matrix to obtain a clustering assessed value matrix, and the grey clusters which all the electric power companies belong to are determined according to the maximum value of elements in each row of the clustering assessed value matrix. Compared with the prior art, power distribution network repair ability characteristics can be reflected completely, and a whole set of complete reference basis is formulated for scientific assessment of the power distribution network repair ability level.

Description

technical field [0001] The invention relates to a method for evaluating the emergency repair capability of a distribution network, in particular to a method for evaluating the emergency repair capability of a distribution network based on improved gray clustering. Background technique [0002] The distribution network repair capacity refers to the measurement of the distribution network's ability to restore its power supply to the maximum extent after a power user fails. And the optimization of the construction plan of supporting facilities. [0003] The emergency repair work of the distribution network is mainly completed by the power company in the region. Due to many factors affecting the emergency repair capability, there is currently no one that can evaluate the distribution network emergency repair capability based on the power company's distribution network emergency repair history data and objective factors. method. [0004] The existing evaluation methods are main...

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Problems solved by technology

[0003] The emergency repair work of the distribution network is mainly completed by the power company in the region. Due to many factors affecting the emergency repair capability, there is currently no one that can evaluate the distribution network emergency repair capability based on the power company's distribution network emergency repair history data and objective factors. method

[0004] The existing evaluation methods are mainly for the evaluation and research of the emergency repair capabilities of other industries or other directions of the electric power industry. The evaluation methods are basically divided into qualitative and quantitative. Among them, due to the high subjectivity of the AHP, it is usually improved to a certain extent, such as fuzzy mathematics or gray theory, but the existing theory is not applicable to the characteristics of the distribution network, that is, the realization of purely using fuzzy theory will cause problems in determining The calculation of the weight is difficult, and the whitening number of the gray theory is inconsistent with the characteristics of the distribution network (such as the repair time, etc.), and needs to be improved

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