Overheating fault diagnosis method of transformer

A fault diagnosis, transformer technology, applied in instruments, measuring electrical variables, measuring devices, etc., can solve problems such as unreliable results

Inactive Publication Date: 2016-04-20
STATE GRID CORP OF CHINA +3
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of research pays more attention to the performance of a single algorithm itself, and the decision-making results depend on the filtered feature information and classification algorithms. In transformer fault diagnosis, only using the fault feat

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Overheating fault diagnosis method of transformer
  • Overheating fault diagnosis method of transformer
  • Overheating fault diagnosis method of transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as figure 1 As shown, the invention of this example is a transformer overheating fault diagnosis method, the method includes the basic probability distribution function construction process and the evidence synthesis process and is realized by constructing the basic probability distribution function module and the evidence synthesis module respectively;

[0051] The basic probability distribution function construction module is to use the posterior probability SVM to calculate the basic probability distribution function of various types of faults under two types of evidence without coding four-ratio and characteristic gas;

[0052] The evidence synthesis module synthesizes the two evidence bodies based on evidence theory to form a final judgment result, and the result form is the probability value that the transformer belongs to various types of faults.

[0053] The construction process of the basic probability distribution function includes the following steps:

...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to an overheating fault diagnosis method of a transformer. The method comprises steps of calculating basic probability distribution functions of all kinds of faults on the evidence of codeless four ratios and characteristic gas by use of a posterior probability SVM; and then according to evidence theory definition, calculating fusion results of all kinds of the results under combined effects of multi-evidence bodies for belief functions of different evidence bodies. A probability estimation module is introduced in a 'one versus one' multiclass SVM by use of a pair-wise coupling algorithm, so defects of limitations on following data processing imposed by hard decision output when a traditional SVM is solving multiclass problems are overcome and an SVM probability output problem is effectively solved. According to the invention, by fully using redundant and complementation information of chromatographic data and electric test data and applying the D-S evidence theory, correction and reliability of comprehensive diagnosis results based on multi-default characteristics are greatly improved than the diagnosis based on single-default characteristics, which facilitates diagnosis of fault types of the transformer and has practical significance for formulation of maintenance strategies of the transformer.

Description

Technical field: [0001] The invention relates to a method for diagnosing a transformer overheating fault, in particular to a method for diagnosing a transformer overheating fault based on posterior probability SVM and evidence synthesis technology. Background technique: [0002] In the power system, the transformer is an important equipment of the power system, and its working status directly affects the stability of the power grid. Therefore, it is of great practical significance to study the transformer fault diagnosis technology and improve the operation and maintenance level of the transformer. In transformer overheating fault diagnosis, dissolved gas analysis in oil DGA is recognized as an effective means to detect transformer initial faults. Transformer overheating faults refer to high temperature overheating faults, medium temperature overheating faults and low temperature overheating faults, which are used for transformer fault diagnosis The characteristic gases diss...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01R31/00
Inventor 黄凤梁云郭经红黄莉喻洁梅军姚继明田文峰刘世栋韦磊
Owner STATE GRID CORP OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap