Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for Predicting the Likelihood of Occurrence of Anomalies in Oil-Immersed Electrical Equipment

A prediction method and technology of electrical equipment, applied to electrical components, parts of transformers/inductors, circuits, etc., can solve problems such as inability to diagnose unfavorable conditions

Inactive Publication Date: 2011-11-30
MITSUBISHI ELECTRIC CORP
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, such a method of diagnosing oil-filled electrical equipment is effective for diagnosing the current disadvantages of oil-filled electrical equipment such as deterioration of insulating paper and flowing electrification, but it cannot diagnose future problems caused by the production of copper sulfide in oil-filled electrical equipment. Possibility of Adverse Circumstances

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
  • Method for Predicting the Likelihood of Occurrence of Anomalies in Oil-Immersed Electrical Equipment
  • Method for Predicting the Likelihood of Occurrence of Anomalies in Oil-Immersed Electrical Equipment
  • Method for Predicting the Likelihood of Occurrence of Anomalies in Oil-Immersed Electrical Equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0035] The procedure of the present invention is shown below based on specific research results.

[0036]First, based on ASTM D 1275B, which is a test method of ASTM (American Society for Testing and Materials: American Society for Testing and Materials), transformer oil after confirming that it does not contain corrosive sulfur is prepared. Next, a predetermined amount of DBDS is added to this transformer oil. In this experiment, 30 and 300 ppm of DBDS were added. 4 g of this transformer oil and a copper plate were enclosed in a bottle having an inner volume of 10 cc, and a rubber stopper was plugged, followed by heating at a predetermined temperature and time.

[0037] DBDS, dibenzylsulfide, and bibenzyl contained in the heated transformer oil are analyzed by gas chromatography / mass analyzer (GC / MS), and the concentrations of these compounds can be determined.

[0038] As an example, in the case of heating at 165°C, the relationship between the generated bibenzyl concentra...

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 present invention relates to a method for predicting the probability of abnormality occurrence in an oil-filled electrical apparatus, which comprises subjecting a sample of insulating oil withdrawn from a transformer in operation to compositional analysis, calculating the estimated concentration of dibenzyl disulfide in the insulating oil in its virgin state from the result of the analysis, and predicting the probability of abnormality occurrence in the oil-filled electrical apparatus on the basis of the level of the estimated concentration.

Description

technical field [0001] The present invention relates to a method for predicting the possibility of abnormal occurrence of sulfidation corrosion in oil-immersed electrical equipment such as transformers, and more specifically, to prediction of the concentration in insulating oil of reaction products of chalcogenide compounds and copper that cause sulfidation corrosion The method of the possibility of abnormal occurrence due to sulfidation corrosion. Background technique [0002] For oil-filled electrical equipment such as oil-filled transformers, there is an insulating oil containing a sulfur component as the insulating oil. In this case, it is known that conductive copper sulfide (sulfurization corrosion) is formed due to the reaction between the copper parts of the oil-immersed electrical equipment and the sulfur component in the insulating oil, which adheres to the insulating paper and the like, causing insulation breakdown. Immersion electrical equipment can cause fatal ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/00G01N30/88H01F41/00
CPCG01N2030/8854H01F2027/404H01F27/14G01N33/287G01N30/7206
Inventor 外山悟水野康太谷村纯二网本刚
Owner MITSUBISHI ELECTRIC CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com