Electric power distribution network reliability relevance and evaluation model based on DS evidence and variable weight theory and construction method thereof

Abstract

The invention discloses an electric power distribution network reliability relevance and evaluation model based on the DS evidence and the variable weight theory and a construction method thereof. Themodel involves electric power distribution network reliability double-level evaluation indexes, including upper-level indexes and lower-level indexes; the upper-level indexes are indicated as 'factorlevel'; the lower-level indexes are indicated as 'performance level'; the method includes the steps of analyzing influence factors of the electric power distribution network reliability, and definingthe double-level evaluation indexes of the electric power distribution network reliability and the influence factors; establishing a single gray correlation model between the electric power distribution network reliability double-level evaluation indexes; establishing a comprehensive gray correlation model between the electric power distribution network reliability double-level indexes based on the entropy weight method and the DS evidence theory respectively; considering the balance of all the influence factors, introducing the variable weight theory to establish an evaluation model of the electric power distribution network reliability, and obtaining a comprehensive score of the reliability planning scheme. The model and the method solve the problems of subjectivity and one-sidedness ofthe single gray correlation model, consider influences of factor changes on weight, and enable evaluation results to be closer to a true value.

Description

technical field [0001] The invention relates to a distribution network reliability planning model and a method for establishing the model, in particular to a distribution network reliability correlation and evaluation model based on DS evidence and variable weight theory and a method for establishing the same. Background technique [0002] The distribution network is directly connected to the power generation and transmission network and users, and is responsible for supplying and distributing electric energy to users. Its reliability is related to the quality of electricity used by users. The rapid economic development and the diversified needs of users continue to drive the planning and construction of high-reliability distribution networks. In order to clarify the influence mechanism of various factors on the reliability of the distribution network and take targeted measures for construction and transformation, it is necessary to study the factors associated with the reli...

AI Technical Summary

Problems solved by technology

However, such methods rely on expert experience and lack objectivity and scientificity.

In addition, the method of scoring reliability with constant weight coefficients combined with various factor indicators does not consider the balance of indicators, so it is necessary to establish an evaluation model that is closer to the real situation

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