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Direct-current cable withstand voltage test device, discharge method and withstand voltage test method

A technology of withstand voltage test device and DC cable, which is applied in the direction of measuring device, measuring electricity, measuring electrical variables, etc., can solve the problems of long discharge time and insufficient discharge, so as to increase discharge efficiency, avoid potential safety hazards and high assembly efficiency Effect

Pending Publication Date: 2021-12-28
ZHONGTIAN TECH SUBMARINE CABLE CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of the DC cable withstand voltage test device in the prior art, when the cable is discharged, the discharge time is long and the discharge is insufficient, thereby providing a DC cable withstand voltage test device and Method for discharging DC cables using the DC cable withstand voltage test device

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  • Direct-current cable withstand voltage test device, discharge method and withstand voltage test method
  • Direct-current cable withstand voltage test device, discharge method and withstand voltage test method
  • Direct-current cable withstand voltage test device, discharge method and withstand voltage test method

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Embodiment Construction

[0032] After the production and laying of high-voltage DC cables, factory tests and completion tests are required to verify the performance of the cables. However, if the discharge of large-length high-voltage DC cables is not sufficient after the test, personal or equipment safety will be endangered.

[0033] In the related technology, the resistance discharge of the cable insulation layer and the generator body are used for discharge, but when the cable length is long and the voltage is high, problems such as long discharge time, insufficient discharge, and high discharge risk will occur.

[0034] In view of this, this embodiment provides a DC cable withstand voltage test device and a discharge method, which can solve the problems existing in the existing discharge equipment and discharge methods.

[0035] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described emb...

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Abstract

The invention provides a direct-current cable withstand voltage test device, a discharging method and a withstand voltage test method, and belongs to the technical field of cable tests. The direct-current cable withstand voltage test device comprises a direct-current voltage generator connected with a test cable through a resistance-capacitance voltage divider; the resistance-capacitance voltage divider is further connected with at least one discharge module, the discharge module comprises a discharge resistor and a discharge switch, and the discharge resistor and the discharge switch are connected to the resistance-capacitance voltage divider in series, so that a test cable connected with the resistance-capacitance voltage divider can be grounded; according to the direct-current cable withstand voltage test device, the resistance-capacitance voltage divider is connected with the discharging module, the discharging efficiency of the direct-current cable can be improved through the discharging module, in addition, the number of the discharging modules can be increased according to the specification of the direct-current cable, and therefore the direct-current cable withstand voltage test device can be flexibly suitable for the discharging efficiency of large-length direct-current cables of various specifications.

Description

technical field [0001] The invention relates to the technical field of cable testing technology, in particular to a DC cable withstand voltage test device, a discharge method and a withstand voltage test method. Background technique [0002] With the rapid development of the national economy, the demand for high-voltage DC cables is gradually increasing. After the withstand voltage test of the high-voltage DC cables, the cables need to be discharged. [0003] However, because the length of high-voltage DC cables used in submarine cables is generally longer, generally more than 50 kilometers, the current DC cable withstand voltage test device has problems such as long discharge time and insufficient discharge when discharging the above-mentioned large-length DC cables. question. In addition, due to the need for on-site operations during discharge, there are certain potential safety hazards. Contents of the invention [0004] Therefore, the technical problem to be solved b...

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 严彦刘宇胡德芳胡明闫志雨张洪亮于洪淼
Owner ZHONGTIAN TECH SUBMARINE CABLE CO LTD
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