Cable intermediate joint insulation state evaluation method and system

A technology for cable intermediate joints and intermediate joints, applied in the field of electric power, can solve problems such as poor accuracy and comparison of insulation deterioration of multiple intermediate joints, and achieve the effect of simplifying the amount of calculation and simple and convenient calculation steps.

Active Publication Date: 2022-05-24
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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Problems solved by technology

[0004] This application provides a method and system for evaluating the insulation state of cable intermediate joints, which are used to solve the technical problems of poor evaluation accuracy and inability to compare the insulation degradation of multiple intermediate joints in the prior art

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  • Cable intermediate joint insulation state evaluation method and system
  • Cable intermediate joint insulation state evaluation method and system
  • Cable intermediate joint insulation state evaluation method and system

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Embodiment Construction

[0064] In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0065] see figure 1 , a method for evaluating the insulation state of a cable intermediate joint provided in the embodiment of the present application includes:

[0066] Step 101 , using the relative temperature rise of the surface temperature of the intermediate joint and the ambient temperature and the partial disch...

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Abstract

The invention discloses a cable intermediate joint insulation state evaluation method and system, and the method comprises the steps: firstly obtaining evaluation characteristic quantities representing the insulation state of a cable intermediate joint, and carrying out the standardization processing of each evaluation characteristic quantity; secondly, determining the subjective weight of each index by adopting an improved analytic hierarchy process, determining the objective weight of each index by adopting an improved entropy method, then combining the subjective weight and the objective weight by applying a comprehensive weighting method to obtain a constant weight, and introducing a variable weight function to carry out weight correction on the constant weight; corresponding measures are taken to make up for the defect that the weight correction effect of a variable weight function on the condition of serious distortion of multiple indexes is poor; and finally, evaluating the insulation state of the intermediate joint of the cable by adopting an improved superior and inferior solution distance method to obtain the insulation deterioration condition of each intermediate joint and the comparison condition of the insulation deterioration degree of each joint. Therefore, the technical problems that the evaluation accuracy is poor and the insulation degradation conditions of a plurality of intermediate joints cannot be compared are solved.

Description

technical field [0001] The present application relates to the field of electric power technology, and in particular, to a method and system for evaluating the insulation state of an intermediate joint of a cable. Background technique [0002] Cable accessories have become the weakest link of the cable line. Compared with terminal connectors, intermediate cable joints have the characteristics of a large number and complex operating environment. They have become the high-frequency area of ​​cable accessories failure. Monitoring and evaluation is the top priority in solving the problem of cable failure. [0003] At present, there are mainly the following methods for evaluating the insulation state of cable intermediate joints: 1) Selecting the ultrasonic signal as the state quantity of the cable intermediate joint for monitoring is a non-electrical measurement, and this method cannot accurately and quantitatively analyze the state quantity and the insulation state. The relatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/04G06F119/08
CPCG06F30/20G06F2119/04G06F2119/08Y04S10/50
Inventor 刘少辉武利会梁年柏欧晓妹郭国伟罗容波何智祥张殷刘崧李雷王云飞
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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