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Cable intermediate joint insulator aging diagnosis method, system and device

A technology for cable intermediate joints and diagnostic methods, applied in the direction of testing dielectric strength and using acoustic measurement for testing, etc., can solve problems such as inability to directly characterize the intrinsic properties of insulating materials, and achieve the solution of ultrasonic probe layout and signal transmission, ensuring stability performance, to achieve the effect of online monitoring

Inactive Publication Date: 2020-04-14
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0004] The invention provides a method, system and equipment for diagnosing the aging of insulating parts of intermediate joints of cables, which solves the problem of the detection of the aging degree of insulating parts of intermediate joints in the prior art, which cannot directly characterize the intrinsic properties of insulating materials in intermediate joints of cable joints technical problem

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  • Cable intermediate joint insulator aging diagnosis method, system and device
  • Cable intermediate joint insulator aging diagnosis method, system and device
  • Cable intermediate joint insulator aging diagnosis method, system and device

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Embodiment Construction

[0042] The embodiment of the present invention provides a method, system and equipment for diagnosing the aging of the insulating part of the cable intermediate joint, which are used to solve the problem that the existing technology cannot directly characterize the insulating material in the intermediate joint of the cable joint in the detection of the aging degree of the insulating part of the intermediate joint. Intrinsic performance technical issues.

[0043] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons ...

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Abstract

The invention discloses a cable intermediate joint insulator aging diagnosis method, system and device. The method comprises the following steps: carrying out ultrasonic detection on a cable intermediate joint insulator; carrying out spectral analysis on an ultrasonic wave reflected by the cable intermediate joint insulator to obtain an ultrasonic wave velocity V and an aging degree parameter pad;and determining the aging degree of the cable intermediate joint insulator through the ultrasonic wave velocity V and the aging degree parameter pad. According to the embodiment of the invention, thereal-time monitoring of the insulation aging state of the cable intermediate joint is realized through a built-in ultrasonic probe with the transceiving function; compared with existing online monitoring modes for the temperature and partial discharge, the disclosed method enables the real-time performance of the insulating material to be represented well; the defect that in the prior art, the intrinsic performance of the insulating material in the intermediate joint of the cable joint cannot be directly represented is overcome; and the method has guiding significance in practical application.

Description

technical field [0001] The invention relates to the technical field of cable aging diagnosis, in particular to a method, system and equipment for diagnosing the aging of insulating parts of cable intermediate joints. Background technique [0002] The intermediate joint generally refers to the cable intermediate joint, that is, the cable joint in the middle of the cable line. The intermediate joint is a cable accessory used for the intermediate connection of cross-linked cables or oil-immersed cables of various voltage levels. run. The insulator of the intermediate joint can ensure the normal and stable operation of the intermediate joint. However, the insulator of the intermediate joint will inevitably age under long-term use. How to judge the aging of the insulator of the intermediate joint has become a research difficulty. In the prior art, the aging detection methods for the intermediate joint insulation mainly include temperature and partial discharge to indirectly det...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1209
Inventor 余欣聂章翔于是乎杨贤吕鸿汪政李志峰
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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