Power distribution network reliability evaluation method based on AHP and entropy weight method

Abstract

The invention provides a power distribution network reliability evaluation method based on an AHP and an entropy weight method. The power distribution network reliability evaluation method comprises establishing a power utilization reliability index system including a new basic index reflecting the power quality; numbering a power distribution network to be evaluated and acquiring the value of thebasic index through calculation; carrying out subjective weight determining on the basic index by means of an analytic hierarchy process and acquiring the subjective weight [Theta]f through calculation; carrying out objective weight determining on the basic index by means of an entropy weight method and acquiring the objective weight [Omega]f through calculation; carrying out combinatorial optimization on the acquired subjective weight [Theta]f and the objective weight [Omega]f by means of a least square method and acquiring the comprehensive weight [Sigma]f of the basic index; and calculating the power utilization reliability comprehensive evaluation value of each power distribution network. According to the invention, a new index which takes the load capacity as the weight and reflectsthe power quality is increased in a conventional power utilization reliability index system, the subjective condition is considered, and the objective weight determining is combined, the power utilization reliability index system is expanded and improved, and the technical problem that in a conventional entropy weight method, the index weight is out-of-balance and the conventional entropy weight method has limitations is solved.

Description

technical field [0001] The invention relates to the technical field of distribution network reliability evaluation, in particular to a distribution network reliability evaluation method based on AHP and entropy weight method. Background technique [0002] With the development of smart grid, the field of smart power consumption represented by demand response, electric vehicles, and user energy management systems has attracted extensive attention from scholars at home and abroad. The reliability of the power consumption side is the focus of research in the field of smart power consumption. one. At the same time, with the advancement of a new round of electricity market reform in my country, electricity price reform and the marketization of electricity sales side are the key tasks of the reform. All this requires power companies to pay attention to the quality of electricity, a special energy commodity, as well as the needs and experience of users, and to improve the continuou...

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Problems solved by technology

The entropy weight method is an objective weighting method, which may cause some index weights to be unbalanced. At the same time, it cannot pe

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