An Evaluation Method of Power Equipment Based on Discrete Fuzzy Number and Analytic Hierarchy Process

Abstract

The invention proposes a method for evaluating power equipment based on discrete fuzzy numbers and analytic hierarchy process. Construct a multi-level hierarchical analysis model through transformer evaluation indicators, and use expert evaluation to assign weights to indicators at each level in turn, and construct indicator weight vectors through the lowest-level transformer evaluation indicators; aiming at the dimensional differences between the state variables of transformers and the differences in polarity In the case that it cannot be directly compared, the measured data of the power equipment indicators are divided into benefit type and cost type and standardized respectively to obtain dimensionless data; multi-level fuzzy language is used to describe the state of the transformer, and the dimensionless data is mapped through the fuzzy matrix In the space of membership degree, combined with the index weight vector, the state of power equipment is determined through the principle of membership degree, and the evaluation of power equipment is realized. The present invention can take into account the randomness and ambiguity of the electric equipment evaluation index, reduce the artificial subjective influence and the problem of poor sample data in the equipment state evaluation to a certain extent, and have high evaluation reliability.

Description

A Power Equipment Evaluation Method Based on Discrete Fuzzy Numbers and AHP technical field The invention belongs to transformer fault evaluation and maintenance technical field, be specifically related to a kind of based on discrete fuzzy number and level Analytical methods for evaluating power equipment. Background technique As an important part of smart grid, smart substation has the functions of information digitization, standardization, resource network sharing, etc. It can help the power grid realize the integration and intelligence of power generation and transformation, power transmission and distribution, and business information sharing, and achieve high-efficiency Effective collaborative interaction. Among them, as the core equipment in the power transmission and transformation system, the transformer shoulders the important responsibility for the safe operation of the power grid. However, considering various environmental factors and the influence of int...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to provide a power equipment evaluation method based on discrete fuzzy numbers and analytic hierarchy process, which takes into account the fuzziness and randomness of power evaluation indicators, and solves the problem of poor sample data to a certain extent. Transformer status assessment provides a new solution and provides scientific and reasonable guidance for subsequent maintenance work

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