Locating device for fault discharge of cable

Abstract

The invention discloses a locating device for fault discharge of a cable. The locating device is characterized by comprising an optical fiber vibration module, a sensing optical fiber, a high-voltage cable, a high-voltage pulse module, and a data acquisition system, wherein the optical fiber vibration module is connected with the sensing optical fiber and is laid along the high-voltage cable; the high-voltage pulse module outputs a pulse signal which is injected into the high-voltage cable; a vibration signal is generated at a discharge point of the high-voltage cable , and then is returned to the optical fiber vibration module through the sensing optical fiber; the data acquisition system acquires a distributed vibration signal which is measured by the optical fiber vibration module and along the cable and a synchronous pulse signal of the high-voltage pulse module and then sends the signals to a data processor which analyzes and processes the signals to obtain the specific location of the discharge point. Due to the adoption of the structure, the locating device can locate a fault accurately so as to save the human resources and reduce the waste of cable caused by maintenance, is high in fault locating speed and can locate the fault point within several minutes in case of the fault discharge of the cable so as to shorten the fault recovery time of the high-voltage cable; moreover, the device can locate a plurality of fault discharge points at the same time so as to implement a real distributed cable fault location.

Description

technical field [0001] The invention relates to the treatment after a cable discharge fault occurs, in particular to a cable fault discharge positioning device. Background technique [0002] High-voltage cables are the core equipment of the power system. After long-term operation, high-voltage cables will age or be damaged by mice and cause fault discharge. Once the high-voltage cable has a fault discharge, it will seriously affect the operation of the power system, and even cause damage to the cable. [0003] When the high-voltage cable fails to discharge, the current practice of the electric power department is to cut off the power of the cable in the discharge section, and arrange maintenance personnel to go to the scene to find the fault point. After the maintenance personnel arrive at the scene, they apply periodic high-voltage pulses to the cable, and then carry the sound monitoring equipment along the high-voltage cable line to monitor the sound generated by the cabl...

AI Technical Summary

Problems solved by technology

This method takes a long time to find the fault point, and the location of the fault point is not accurate

This method takes a long time to determine the fault location and restore it, and the location of the fault point is not accurate enough. It is necessary to strip a long section of high-voltage cable in order to find the fault discharge point, resulting in waste of cables.

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