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Cable insulation layer aging degree testing method and device

A technology of cable insulation and aging degree, which is applied in the direction of measuring device, measuring electricity, fault location, etc., can solve the problems of inaccurate evaluation of aging degree and unknown historical data of cable insulation layer

Pending Publication Date: 2021-11-30
STATE GRID BEIJING ELECTRIC POWER +2
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Problems solved by technology

[0005] The main purpose of this application is to provide a method, device, computer-readable storage medium and processor for testing the aging degree of the cable insulation layer, so as to solve the inaccurate evaluation of the aging degree caused by the unknown historical data of the cable insulation layer in the prior art question

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  • Cable insulation layer aging degree testing method and device
  • Cable insulation layer aging degree testing method and device
  • Cable insulation layer aging degree testing method and device

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Embodiment Construction

[0020] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0022] It should be noted that the terms "first" and "second...

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Abstract

The invention provides a cable insulation layer aging degree testing method and device. The method comprises the steps of testing dielectric constants of a to-be-tested cable insulation layer under at least three DC bias voltages, and obtaining at least three target dielectric constants, and determining the change rate of the dielectric constant of the to-be-tested cable insulation layer according to the DC bias and the target dielectric constant, wherein the change rate of the dielectric constant is used for representing the aging degree of the to-be-tested cable insulation layer. As the change rate of the dielectric constant is found to be positively correlated with the thermal aging treatment time of the cable insulation layer according to test research, the test method can accurately evaluate the aging degree of the to-be-tested cable insulation layer according to the change rate of the dielectric constant; the problem of inaccurate evaluation of the aging degree caused by unknown historical data of a cable insulation layer in the prior art is solved.

Description

technical field [0001] The present application relates to the field of electrical insulation detection of electric power equipment, in particular, to a method, device, computer-readable storage medium and processor for testing the aging degree of cable insulation layers. Background technique [0002] XLPE insulated cables are widely used in power transmission systems due to their excellent electrical and physical and chemical properties. In the long-term operation process, the cable insulation material will be affected by various factors to age, and its performance will also decline, which will affect the safety and reliability of the power system. The design service time of XLPE cables is generally 30 to 40 years. At present, many lines in my country are in the middle and late stages of design use time. Therefore, it is necessary to evaluate the aging state of XLPE cable insulation. [0003] The current evaluation of the cable insulation aging state is usually to use a var...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/088
Inventor 潘泽华叶宽闫春江郭卫门业堃戴润东周士贻任志刚赵建勇李华春及洪泉段大鹏
Owner STATE GRID BEIJING ELECTRIC POWER
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