Transformer state evaluation method based on correlation analysis and variable weight coefficients

Abstract

The invention relates to a transformer state evaluation method based on correlation analysis and variable weight coefficients, which includes collecting data of transformer states; classifying and processing the collected data as a basis of the transformer state evaluating; evaluating the transformer states; applying a correlation analysis method to establish a comprehensive state quantity evaluation system of the transformer; utilizing a single state quantity score calculating method and a transformer overall score calculating method to grade the transformer states; extracting constant weight coefficients of each of single state quantities and comprehensive state quantities; calculating constant weight coefficients of each of the comprehensive state quantities; calculating an overall score of the transformer states based on scores of each of the comprehensive state quantities and the constant weight coefficients; and determining a transformer operation state based on the overall score of the transformer states. The transformer state evaluation method has the advantages that evaluation models are simple and easy to program, no abundant state evaluation samples are needed, operation states of transformers can be determined rapidly, and operation states and conditions of transformers are truly reflected.

Description

technical field [0001] The invention belongs to the technical field of power transmission and transformation equipment, in particular to a transformer state evaluation method based on correlation analysis and variable weight coefficients. Background technique [0002] Transformer is one of the most critical equipment in the power system. Improving the operation reliability of transformers, especially large transformers, is of great significance to the safe and reliable operation of the entire power grid and to reduce the operating cost of the power grid. In addition to improving the reliability of the transformer in the design and manufacture process, it is more important to improve the maintenance and repair level of the transformer in the operation process. Therefore, it is very necessary to scientifically evaluate the operating state of the transformer. [0003] In recent years, with the in-depth study of condition-based maintenance theory, more and more attention has be...

AI Technical Summary

Problems solved by technology

There are two problems in this method: one is that there are too few parameters for state evaluation, including only four aspects of state information, which cannot fully reflect the operating state of the transformer; The characteristic indicators displayed by the equipment are treated differently, but in fact the two are not isolated, but have a certain relationship

Therefore, this evaluation method has a gap between the evaluation results of the transformer and its real condition, and cannot truly and effectively reflect the health level of the transformer state.

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