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Cable joint insulation state evaluation method

A technology of cable joints and equations, applied in the direction of testing dielectric strength, etc., can solve the problems of no cable joint insulation state evaluation method and inability to obtain cable joint insulation status, etc.

Active Publication Date: 2017-05-17
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no method for evaluating the insulation state of cable joints in the prior art, and it is impossible to obtain the insulation state of cable joints

Method used

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  • Cable joint insulation state evaluation method
  • Cable joint insulation state evaluation method
  • Cable joint insulation state evaluation method

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Embodiment Construction

[0027] The core of the invention is to provide a method for evaluating the insulation state of the cable joint, so as to obtain the insulation state of the cable joint.

[0028] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] Please refer to figure 1 , figure 1 A flow chart of a method for evaluating the insulation state of a cable joint provided by the present invention, the method incl...

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Abstract

The invention discloses a cable joint insulation state evaluation method. The method includes the following steps that: the control equation of cable joint insulation internal air gap defect discharge is built; a micro-particle chemical reaction in the process of the cable joint insulation internal air gap defect discharge is analyzed; the plasma chemical model of cable joint discharge is built according to the control equation and the micro-particle chemical reaction; and the plasma chemical model of the cable joint discharge is solved, and the insulation cracking state of a cable joint can be evaluated. With the method adopted, the insulation state of the cable joint can be obtained.

Description

technical field [0001] The invention relates to the technical field of cable joints, in particular to a method for evaluating the insulation state of a cable joint. Background technique [0002] At present, defects such as air gaps, impurities, and raised burrs will inevitably occur in the production, laying and operation of high-voltage XLPE power cable joints, and these defects will cause local electric field concentration during operation, resulting in local high field In the strong area, space charge injection occurs in the area with high electric field strength, which makes the insulation aging and eventually forms tiny gas-filled discharge micropores or channels, and a series of chemical and chemical reactions caused by partial discharge in the micropores or channels The physical reaction makes the surrounding insulating materials degrade continuously, expanding the discharge channel, and the space charge generated by the partial discharge strengthens the local field s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 陈伟伏进杨帆吴高林胡晓锐杨旗李勇龙英凯李小平
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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