Insulation monitoring and life prediction method of cross linked polyethylene cable

A cross-linked polyethylene and cable insulation technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as failure to reflect the process of insulation deterioration and large-scale dead zones in the middle

Active Publication Date: 2012-10-17
安徽中鑫继远信息技术股份有限公司
View PDF4 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention is to avoid the deficiencies in the above-mentioned prior art, and provides a method for monitoring and life prediction of XLPE cable insulation to solve the absolute problem of directly m

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
  • Insulation monitoring and life prediction method of cross linked polyethylene cable
  • Insulation monitoring and life prediction method of cross linked polyethylene cable
  • Insulation monitoring and life prediction method of cross linked polyethylene cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] see figure 1 , XLPE cable insulation monitoring and life prediction method, one of the leakage current, insulation resistance and dielectric loss angle of XLPE cable is used as the detected quantity α; the prediction method includes the following steps:

[0033] a. Calculate the detected quantity α and the mutation rate β of the detected quantity α in real time, and give a real-time alarm for the real-time mutation rate β greater than 0.01, wherein the mutation rate β=(α n -α n-1 ) / α n-1 , αn, αn-1 are the sampling values ​​of the detected quantity α at different times;

[0034] b. Regularly calculate the daily average value of the detected quantity α monthly average annual average the size of which α ‾ d = Σ 0 24 ( α / 24 ) , ...

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 discloses an insulation monitoring and life prediction method of a cross linked polyethylene cable. One of the leakage current, insulation resistance and dielectric loss angle of the cross linked polyethylene cable serves as detected amount alpha, and the detected amount alpha and the mutation rate beta of the detected amount alpha are computed in real time, so monitoring of a cable insulation degradation process is realized. The daily average, month average and year average of the detected amount alpha and the mutation rate beta of the detected amount alpha are obtained by computation, and the insulation life of the cable is computed according to a formula. The insulation monitoring and life prediction method of the cross linked polyethylene cable has the advantages that monitoring of the cable insulation degradation process can be realized, the service life of cable insulation can be quantitatively predicted, and the utilization rate of the cable is improved.

Description

technical field [0001] The invention relates to a cross-linked polyethylene cable insulation monitoring and life prediction method. Background technique [0002] XLPE (cross linked polyethylene, cross-linked polyethylene) has a history of more than 30 years. XLPE cables have the characteristics of excellent performance, simple process and convenient installation, and have been widely used. The structure of XLPE insulated cable is as follows: figure 2 As shown, it mainly includes conductor 1, conductor shielding layer 2, cross-linked polyethylene insulating layer 3, insulating shielding layer 4, metal shielding layer 5, filling layer 6, inner lining layer 7, armoring layer 8 and outer sheath 9, etc. several parts. [0003] Under the action of high electric field strength, dendritic local damage often occurs in solid media. Under the continuous action of the electric field, these dendritic microchannels may penetrate the entire insulation along the direction of the electri...

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): G01R31/00G01R27/02G01R27/26
Inventor 徐强孟光智建立王飞金芝国韩海舰
Owner 安徽中鑫继远信息技术股份有限公司
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