Cross-linked polyethylene power cable insulation defect characteristic gas detection system
A cross-linked polyethylene and characteristic gas technology, which is applied to the analysis of gas mixtures, the structural details of gas analyzers, and measuring devices, can solve the problems of high noise and high technical difficulty, and achieve the effect of high detection efficiency
Active Publication Date: 2017-05-31
GUANGXI POWER GRID CO LIUZHOU POWER SUPPLY BUREAU
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Live detection or on-line monitoring of partial discharge in transmission cables is based on high-frequency current sensors, ultra-high-frequency sensors, and ultrasonic sensors. The technology is relatively mature, but the on-site partial discharge monitoring site is extremely noisy and technically difficult
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[0014] In order to understand the technical solution of the present invention more clearly, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:
[0015] The XLPE power cable insulation defect characteristic gas detection system includes a characteristic gas sensor 1, a serpentine hose 2, and a monitoring host 3; the characteristic gas sensor 1 is connected to the monitoring host 3 through a serpentine hose 2; the characteristic gas sensor 1 It is used to detect the characteristic gas produced when the cable insulation is defective; the monitoring host 3 includes a sealing ring interface 31, a host casing 32, a characteristic gas amplification circuit 33, an acquisition board 34, and a processor 35; the sealing ring interface 31 is installed On the mainframe shell 32; the characteristic gas amplification circuit 33, the acquisition board 34, and the processor 35 are arranged in the mainframe casing 32; the...
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At present, cable major insulation detection techniques comprise a partial discharge detection technique and an infrared detection technique and the like. Although the partial discharge live detection or on-line monitoring technique is mature in technique, on-site noise caused during partial discharge detection is large, judgment and analysis are complex and technical difficulty is high. The invention relates to the field of power equipment insulation detection technology and application thereof and specifically relates to a cross-linked polyethylene power cable insulation defect characteristic gas detection system. The system comprises a characteristic gas sensor, a snakelike flexible pipe and a monitoring host. The characteristic gas sensor is connected with the monitoring host through the snakelike flexible pipe. During on-site detection, the characteristic gas sensor is put into a cable trench; the monitoring host detects cable characteristic gas through a built-in high-sensitivity detection circuit; and when the characteristic gas is detected and concentration thereof surpasses preset concentration, the monitoring host gives an alarm in a sound-light manner. The system has the advantages of convenient detection and high detection efficiency.
Description
technical field [0001] The invention relates to electric equipment insulation detection technology and its application field, in particular to a characteristic gas detection system for cross-linked polyethylene power cable insulation defects. Background technique [0002] With the acceleration of urbanization in my country, the installation and use of cables in urban distribution networks are increasing. How to ensure the safe operation of a large number of cables and improve the reliability of power supply has become a prominent problem in the operation and management of distribution networks. An important task in the operation and maintenance of high-voltage cables is the detection of the main insulation. Currently, the detection of the main insulation of cables includes partial discharge detection technology and infrared detection technology. Live detection or online monitoring of partial discharge in transmission cables is based on high-frequency current sensors, ultra-...
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IPC IPC(8): G01R31/08G01N33/00
CPCG01N33/0021G01R31/08G01N33/0072
Inventor 刘秀雄黎玉庭林世铭王硕赵嘉骏黄海泉李春华黄琨陶少乐
Owner GUANGXI POWER GRID CO LIUZHOU POWER SUPPLY BUREAU