Cable fault point rapid positioning method and device

Abstract

The invention provides a cable fault point rapid positioning method and device. The fault point positioning method comprises the steps of collecting a plurality of second sound signals, extracting spectrum characteristic parameters, inputting the spectrum characteristic parameters into a trained sound classification model, and preliminarily judging whether the second sound signals comprise a cable fault sound signal or not; performing noise reduction processing on the second sound signals through a noise reducer, and judging whether the second sound signals after noise reduction processing contain a cable fault sound signal or not; and if the second sound signals after noise reduction processing contain the cable fault sound signal, inputting the frequency spectrum characteristic parameter in the second sound signals into a pre-constructed sound analysis model to obtain an impact function coefficient characteristic, and based on the impact function coefficient characteristic and a pre-constructed sound source positioning model, obtaining the distance between the cable fault sound source and a sound acquisition terminal, and then obtaining the position of the cable fault point.

Description

technical field [0001] The invention relates to the technical field of cable fault location, in particular to a method and device for quickly locating cable fault points. Background technique [0002] Power cables are widely used in urban underground power grids, internal power supply lines of industrial and mining enterprises, and underwater power transmission lines across rivers and seas. Once the cable fails, it will cause power outage losses to the production of enterprises and bring inconvenience to the lives of residents. Therefore, after the cable fails, it is necessary to find the fault as soon as possible and repair it. [0003] Finding cable faults generally requires three steps: fault diagnosis, fault location and fault location. Fault diagnosis is to use multimeter and other tools and equipment to check the connectivity of each phase of the cable and the insulation resistance of the fault phase. The purpose of testing the length of the cable between the points ...

AI Technical Summary

Problems solved by technology

Both the acoustic measurement method and the acoustic-magnetic synchronization method require manual monitoring of cable fault sound information. Due to the insensitivity of the human ear to subtle changes in sound intensity, environmental noise interference, and changes in the sound intensity caused by different buried depths of cables, the other Monitoring is difficult, and currently only experienced testers can do it manually. However, the training time for human monitoring is long and the cost is high. Moreover, it is difficult to train, teach and inherit this skill out of the on-site environment, which restricts the improvement of the automation level of cable fault detection. develop

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