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Cable defect detecting system based on induction power supply

A technology of defect detection and inductive power supply, which is applied to the parts of electrical measuring instruments, electrical components, measuring devices, etc., can solve the problems of cable insulation degradation, insulation aging and deterioration, overheating, etc., and achieve the effect of long-term work

Inactive Publication Date: 2019-04-02
南京龙贞自控科技发展有限公司
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

However, after the cable is put into operation, due to insulation aging and deterioration, overheating, mechanical damage, etc., the insulation of the cable will deteriorate during operation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The present invention will be further explained below.

[0013] A cable defect detection system based on inductive power supply, including an insulating cable clamp, the insulating cable clamp includes a clamping part for clamping a round cable, the end of the clamping part is connected to an extension part, the extension part is perpendicular to the cable to be detected, and the end of the extension part The side is connected to the horizontal bar of the parallel cable, and the end of the horizontal bar is provided with an ultrasonic sensor fixing structure. The detection part of the ultrasonic sensor is connected to an optical fiber, and the end of the optical fiber is against the cable to be detected. The signal output end of the ultrasonic sensor is connected to an ultrasonic analyzer, and the pre-calibrated results are compared to determine the degree of cable defect.

[0014] A power supply circuit is also included, and the power supply circuit includes a current ...

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PUM

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Abstract

The invention discloses a cable defect detecting system based on induction power supply. A clamping portion is used to clamp a cable; an ultrasonic sensor is disposed outside a safe distance from thecable, and the ultrasonic sensor conducts, through an optical fiber, a pressure wave signal generated during partial discharge of the online running cable caused by a cable core defect, sends the detected signal to an ultrasonic analyzer for detection and analysis; and finally the detection and analysis result is compared with a pre-calibrated result to determine the degree of cable defect. The system, by adopting a special cable clamp, can safely detect the defects of the cable when the cable is running online, and can conduct sound waves through the optical fiber, with a detection success rate much higher than the test result under the cable offline state. At the same time, the power supply circuit realizes the power supply from the cable, which can meet the long-term work under complicated conditions.

Description

technical field [0001] The invention relates to a cable defect detection system based on inductive power supply. Background technique [0002] With the rapid development of the power system and the progress of the old city renovation project, the application of power cables in the power network is becoming more and more extensive. The basic structure of a power cable includes four parts: core, insulation layer, shielding layer and protective layer. The core is the conductor, which is the part of the power cable that transmits electrical energy and is the main structure of the cable. The insulating layer electrically isolates the wire core from the outside world. The shielding layer includes a conductor shielding layer and an insulating shielding layer, and generally exists in cables of 15kV and above. The protective layer is used to prevent the infiltration of external impurities and moisture and the damage of external force. [0003] According to the voltage level, powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R31/08G01R1/04
CPCG01R31/1209G01R1/0425G01R31/083H02J50/10
Inventor 华正浩朱光茂张晓华张林川
Owner 南京龙贞自控科技发展有限公司
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