Cable intermediate joint insulator aging diagnosis method, system and device

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...

AI Technical Summary

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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