Substation automation equipment state evaluation method and system

Abstract

The invention discloses a substation automation equipment state evaluation method and system. The method comprises the steps of establishing an evaluation index system; dividing state levels and forming a parameter set; forming a plurality of fuzzy soft sets by utilizing expert evaluation data; obtaining an interval value fuzzy soft set by utilizing all the fuzzy soft sets; obtaining an integratedinterval value fuzzy set and an initial score by adopting a weighted fuzzy decision algorithm; normalizing the initial score to obtain a specific gravity value and a weight value; determining a scorevalue and a state level of each state index; and obtaining an importance sequence of the state indexes according to the index weights, judging existing fault dangers according to score values corresponding to the state indexes, and giving a corresponding early warning maintenance strategy after comprehensive analysis. According to the method, the problems of heavy calculation amount and possiblesorting consistency when the fuzzy analytic hierarchy process is used for determining the weight can be avoided, the comprehensive state of the substation automation system can be evaluated objectively and effectively, maintenance strategy reference is provided, and the method has the advantage of high expansibility.

Description

technical field [0001] The invention relates to the detection technology of substation automation equipment in the field of electric power engineering, in particular to a state evaluation method and system of substation automation equipment. Background technique [0002] With the development of smart grid, smart substations appear, which use modern advanced sensor, electronics, information, communication, control and software technologies to build a unified application platform. Through network communication and digital systems, the functions of the secondary system of the smart substation are fundamentally developing: in addition to the traditional functions of the main system such as control, protection and monitoring, the substation automation system will also provide more information related to new functions, Such as dynamic performance monitoring, system aging and dynamic capacity. Conventional sensing methods can already ensure simple insulation structure and excellen...

AI Technical Summary

Problems solved by technology

However, the above methods all use the combination of AHP and Delphi method to determine the weight of the target. However, with the diversification of substation equipment, in order to ensure the accuracy of the evaluation results, the number of indicators collected is also increasing. The calculation of the 1-9 rating method in the analysis becomes larger and larger, and it becomes more and more difficult to solve the eigenvalues ​​and eigenvectors of the judgment matrix; and in many fuzzy decision-making applications, only 1-9 ratings are used to describe Uncertainty cannot be accurately described when an indicator is personalized

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