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

A cable condition monitoring method and device based on cable aging feature extraction

A feature extraction and cable technology, applied in the field of cable condition monitoring based on cable aging feature extraction, can solve the problems of unclear relationship between cable aging degree and difficult quantitative estimation of cable aging degree, etc., to achieve the effect of intuitive and quantitative estimation

Active Publication Date: 2022-07-26
TSINGHUA UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The relationship between partial discharge and cable aging is not yet clear, and it is difficult to achieve quantitative estimation of cable aging by partial discharge method

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
  • A cable condition monitoring method and device based on cable aging feature extraction
  • A cable condition monitoring method and device based on cable aging feature extraction
  • A cable condition monitoring method and device based on cable aging feature extraction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the specific embodiments and the accompanying drawings. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present invention.

[0060] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings. According to the first embodiment of the present invention, a cable condition monitoring method based on cable aging feature extraction is provided. The cable condition monitoring method provided by this embodiment is based on the common mode monitoring signal injection method. Analysis (PCA) method extract...

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 a cable state monitoring method and device based on the extraction of cable aging characteristics. The common mode monitoring voltage of multiple frequencies is injected into the system through the neutral point of the transformer of the distribution network system, and the common mode monitoring voltage of the multiple frequencies induced is measured. The magnitude of the mode leakage current can be used to obtain the actual monitoring cable aging characteristics, which can effectively overcome the influence of the leakage inductance of the distribution network transformer on the cable online monitoring accuracy. In the above process, the aging characteristics are extracted by principal component analysis (PCA) on the standard matrix. , and further obtain the measurement eigenvector matrix, so as to use the measurement eigenvector matrix and the measured common mode leakage current to realize the monitoring of the aging state and the estimation of the aging degree. The common mode injection method is adopted for the monitoring signal, and the superimposed signal will not induce current on the load, which is non-intrusive; correspondingly, the change of the load will not affect the monitoring results, which can be used in various operating environments of the system. Effective monitoring of cable insulation is achieved.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of cable insulation state, in particular to a cable state monitoring method and device based on cable aging feature extraction. Background technique [0002] With the continuous growth of the operation time of underground cables in the distribution network, more and more cables are entering the aging period. Cable aging is often caused by the harsh operating environment and thermal effect of load current, which will eventually lead to insulation breakdown and short-circuit faults, affecting the safe and reliable operation of the distribution network and bringing huge economic losses. At present, most distribution network cables still use periodic offline maintenance, which requires the cables to be monitored to be out of service, which affects the normal operation of the system, and the widely used methods such as overvoltage testing in offline testing may further cause further damage t...

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 Patents(China)
IPC IPC(8): G01R31/52G01R31/58
CPCG01R31/52G01R31/58
Inventor 张品佳吴阳
Owner TSINGHUA UNIV
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