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Method and device for evaluating insulation performance of cable

A technology of insulation performance and cable insulation, which is applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., and can solve the problem of not being able to know the insulation state of cables.

Pending Publication Date: 2022-02-18
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, insulation resistance test, ultra-low frequency dielectric loss test and polarization / depolarization current test can only evaluate the overall insulation state of the cable, and cannot specifically know the local insulation state of the cable

Method used

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  • Method and device for evaluating insulation performance of cable
  • Method and device for evaluating insulation performance of cable
  • Method and device for evaluating insulation performance of cable

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Embodiment Construction

[0070] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0071] The solution of this application can be implemented based on a terminal capable of data processing, and the terminal can be a mobile phone, a computer, a server, a cloud, and the like.

[0072] Next, combine figure 1 Said, the method for evaluating cable insulation performance of the present application can comprise the steps:

[0073] Step S110, responding to the user's operation of performing an FDR positioning test on the cable to be tested, and acquiring the FDR position...

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Abstract

The invention discloses a method and device for evaluating the insulation performance of a cable. The method comprises the steps of: obtaining an FDR positioning spectrogram of a to-be-tested cable after the test of a user in response to the operation of performing an FDR positioning test on the to-be-tested cable by the user; determining damped segments of the to-be-tested cable according to the FDR positioning spectrogram; and evaluating the insulation performance of the to-be-tested cable according to the number of the damped segments in the to-be-tested cable. Therefore, through carrying out damp analysis on each position of the cable, the local damp state of the cable is obtained, and then the local insulation state of the cable is obtained, so that the insulation performance of the cable is evaluated.

Description

technical field [0001] The present application relates to the technical field of cable insulation diagnosis, and more specifically, relates to a method and device for evaluating cable insulation performance. Background technique [0002] Nowadays, cables are widely distributed in the corners of people's lives, and are easily damaged by weather, environment and other reasons. For example, distribution cables are usually laid in cable trenches with perennial water or in humid soil. If the outer sheath of the cable is damaged or the waterproof performance of the intermediate joint is reduced, moisture can easily invade the cable and endanger the insulation performance of the cable. Under the action of electric field, the semi-conductive layer of the cable and the copper shielding layer will produce hydrophilic ions under the chemical reaction, which makes the moisture and these ions gradually migrate into the main insulating layer of the cable, resulting in the reduction of cab...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 何嘉兴方健莫文雄杨帆
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD