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Cable withstand voltage partial discharge synchronous detection device

A synchronous detection and cable technology, which is applied in the direction of measuring devices, measuring circuits, testing circuits, etc., can solve problems such as inability to withstand voltage tests, achieve the effect of reducing efficiency and improving detection efficiency

Pending Publication Date: 2020-11-03
WEIHAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The AC attenuation damped oscillatory wave partial discharge test device uses the oscillatory wave damped oscillation to carry out the partial discharge test on the cable, and cannot perform the withstand voltage test at the same time as the partial discharge test

Method used

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  • Cable withstand voltage partial discharge synchronous detection device
  • Cable withstand voltage partial discharge synchronous detection device
  • Cable withstand voltage partial discharge synchronous detection device

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with embodiment. Apparently, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] Please refer to figure 1 , figure 1 It is a structural block diagram of the cable partial discharge synchronous detection device 10 provided by the present invention. A cable partial discharge synchronous detection device 10 provided by the present invention includes a high-voltage DC power supply unit 100 , a polarity conversion unit 200 and an oscillatory wave generation unit 300 . The high-voltage direct current power supply unit 100 converts alternating current into high-voltage direct current, which is used by the polarity conversion unit 200 and the oscillatory wave ge...

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Abstract

The invention discloses a cable withstand voltage partial discharge synchronous detection device, which comprises a high-voltage direct current power supply unit, a polarity conversion unit and an oscillatory wave generation unit; the high-voltage direct current power supply unit is connected with an alternating current power supply and converts and outputs alternating current into high-voltage direct current; one end of the polarity conversion unit is connected with the high-voltage direct-current power supply unit and used for outputting ultralow-frequency cosine square waves as withstand voltage test waves, and the other end of the polarity conversion unit is connected with a cable to perform withstand voltage detection on the cable; one end of the oscillatory wave generation unit is connected with the high-voltage direct-current power supply unit, and the other end of the oscillatory wave generation unit is connected with the cable and forms an oscillation circuit with the cable togenerate damped oscillation to perform partial discharge detection on the cable. The cable withstand voltage partial discharge synchronous detection device disclosed by the invention can synchronously perform withstand voltage detection and partial discharge detection on the cable, improves the detection efficiency, can also improve the voltage of partial discharge detection during synchronous detection, is easier to discover a partial discharge phenomenon, and has very strong practicability in the technical field of cable detection.

Description

technical field [0001] The invention relates to the technical field of cable detection, in particular to a cable partial discharge synchronous detection device. Background technique [0002] Cables play an important role in the power transmission and distribution system. In order to improve the operational reliability of cable equipment and avoid cable failures affecting the normal operation of the power transmission and distribution system, after the completion of cable laying or the production and maintenance of cable heads, the cables need to be repaired. Voltage withstand test and partial discharge test to find faults and hidden dangers of cables. [0003] At present, the withstand voltage test is generally carried out before the cable is put into operation, and the partial discharge test is carried out after the cable is put into operation. Although the cable has passed the withstand voltage test, the partial discharge point on the main body or its accessories is not fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/14G01R31/12
CPCG01R31/14G01R31/1272
Inventor 刘毅洪福柯夏楠都基伟于学魁赵敏刘艳红陶方杰李晓光翟明远宋逸婷王伟颖姜佳玮周君民
Owner WEIHAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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