A method and system for evaluating the insulation state of a cable intermediate joint

A technology of cable intermediate joints and intermediate joints, which is applied in the field of electric power, can solve the problems of poor accuracy, comparison of insulation degradation of multiple intermediate joints, etc., and achieve the effect of simplifying the calculation amount and simple and convenient calculation steps

Active Publication Date: 2022-07-19
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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  • A method and system for evaluating the insulation state of a cable intermediate joint
  • A method and system for evaluating the insulation state of a cable intermediate joint
  • A method and system for evaluating the insulation state of a cable intermediate joint

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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 this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this 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 discharge signal of...

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Abstract

The present application discloses a method and system for evaluating the insulation state of an intermediate joint of a cable. The method includes: firstly obtaining evaluation feature quantities representing the insulation state of a cable intermediate joint, and standardizing each evaluation feature; secondly, using an improved AHP to determine each index The objective weight of each index is determined by improving the entropy value method, and then the comprehensive weighting method is used to combine the subjective and objective weights to obtain the constant weight. In the case of severe distortion of the index, the weight correction effect is not good. Finally, the improved solution distance method is used to evaluate the insulation status of the intermediate joints of the cable, and the insulation deterioration of each intermediate joint and the comparison of the insulation deterioration degree of each joint are obtained. Therefore, the technical problem of poor evaluation accuracy and inability to compare the insulation deterioration of multiple intermediate joints is 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 zone 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 relations...

Claims

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Application Information

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Patent Type & Authority Patents(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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