Cable middle connector partial discharge signal detection system and method

Abstract

The invention provides a cable middle connector partial discharge signal detection system. The cable middle connector partial discharge signal detection system comprises an excitation light source, anoptical fiber with a fluorescence optical fiber sensor, an optical fiber wiring box and a fluorescence spectrometer, wherein the optical fiber with the fluorescence optical fiber sensor penetrates into a power cable connected by a middle connector and extends along the length direction of the power cable; the fluorescence optical fiber sensor located at the middle part is clung to the middle connector; two ends of the fluorescence optical fiber sensor are connected with the excitation light source and an input end of the optical fiber wiring box; an output end of the optical fiber wiring boxis connected with the fluorescence spectrometer; a sensing element of the fluorescence optical fiber sensor is made of a fluorescence material; a spectrum range of the sensing element is matched witha spectrum range generated by middle connector partial discharge. The cable middle connector partial discharge signal detection system is not interfered by electricity and has the advantages of stronganti-interference capability and the like; hidden dangers caused by insulation of the power cable middle connector are rapidly and accurately detected, so that coping measurements can be implementedin time, and economic loss caused by power failure and the like is reduced.

Description

technical field [0001] The invention relates to the technical field of cable partial discharge signal detection, in particular to a cable intermediate joint partial discharge signal detection system and method. Background technique [0002] Power cables are widely used in various voltage levels of power systems due to their good electrical and thermal properties, simple structure, short manufacturing cycle, high working temperature tolerance, no oil, and convenient laying. However, after a certain number of years of use, the power cable may have internal insulation defects (especially the intermediate joints of the power cable). This defect will gradually expand due to partial discharge corrosion, and eventually it will inevitably lead to insulation breakdown and cause a power outage accident. Therefore, it is necessary to detect the partial discharge signal of the power cable to prevent possible internal insulation defects. [0003] At present, the partial discharge monito...

AI Technical Summary

Problems solved by technology

[0003] At present, the partial discharge monitoring of power cables generally uses power outages for withstand voltage tests, shock wave monitoring, etc., which involves the reliability of power supply, and the degree of defect can only be found in a large range

Images