Method for acquiring evaluation result of direct-current distribution network planning scheme

Abstract

The invention relates to a method for acquiring an evaluation result of a direct-current distribution network planning scheme, which comprises the following steps of: 1, constructing a comprehensive evaluation index system of the direct-current distribution network planning scheme, and establishing a calculation mathematical model of each index; 2, constructing a comprehensive interval intuitionistic fuzzy judgment matrix according to the comprehensive evaluation index system and the index calculation value of the planning scheme, and checking the consistency of the comprehensive interval intuitionistic judgment matrix; and 3, processing the constructed interval intuitionistic fuzzy judgment matrix based on a foreground theory and an MYCIN uncertainty factor to obtain a comprehensive evaluation value, and sequencing the schemes according to a comprehensive evaluation value maximization principle to obtain an evaluation result of the planning scheme. Compared with the prior art, the method has the advantages that the problem of insufficient mining of uncertain information is solved, the uncertainty of subjective recognition in decision making is reduced, the identification degree of the evaluation result is improved, and the decision making result better conforms to reality and is more credible.

Description

technical field [0001] The invention relates to the field of direct current distribution network planning, in particular to a method for obtaining evaluation results of a direct current distribution network planning scheme. Background technique [0002] In recent years, with a large number of diverse DC loads and distributed generation (Distributed Generation, DG) connected to the distribution network, medium-voltage DC power distribution technology has become a current research hotspot. It is of great practical significance to evaluate the planning scheme of DC distribution network scientifically and rationally. The optimization of DC distribution network planning scheme is a process including establishing a comprehensive evaluation index system, using appropriate evaluation methods to evaluate and rank the alternatives, and finally selecting the optimal planning scheme. [0003] At the current stage, the comprehensive evaluation of the complex DC power distribution system...

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Problems solved by technology

2) The comprehensive evaluation methods of traditional AC distribution network planning schemes mainly include AHP, fuzzy comprehensive evaluation method and data envelopment method, etc., but these methods have obvious defects in practical applications, such as: evaluation index system Imperfectness; Unreasonable weight determination; Insufficient fuzzy description of expert judgment; Insufficient mining of uncertain information, etc.

[0004] At present, there are very few studies on the comprehensive evaluation of DC distribution network planning schemes. The main difficulties lie in: how to establish an index system for effectively evaluating the comprehensive performance of DC active distribution networks; how to comprehensively consider the randomness and uncertainty brought by distributed energy. , and consider the ambiguity and risk tendency of expert judgment; how to simplify the calculation of the complex problem of comprehensive evaluation of DC main distribution network planning scheme

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