Cable local discharging on-line monitoring method and device

A partial discharge and cable technology, applied in the field of cable partial discharge online monitoring, can solve problems such as low accuracy, achieve accurate partial discharge early warning, and ensure the effect of reliable operation

Inactive Publication Date: 2018-12-14
SUZHOU GUANGGE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the accuracy rate of the current on-line monitoring of cable partial discharge is low, which brings great problems to the engineering application of partial discharge monitoring and the accuracy rate of partial discharge monitoring

Method used

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  • Cable local discharging on-line monitoring method and device
  • Cable local discharging on-line monitoring method and device
  • Cable local discharging on-line monitoring method and device

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Embodiment Construction

[0024] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0025] It should be noted that when an element is referred to as being “formed on” another element, it may be directly formed on the other element or there may be an intervening element. The terms "upper", "lower" and similar expressions used herein are for the purpose of illustration only an...

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Abstract

The invention relates to a cable local discharging on-line monitoring method and device. The cable local discharging on-line monitoring method provided by the invention comprises the steps of: acquiring a local discharging signal of the cable in real time; determining a discharging threshold early-warning level according to the acquired local discharging signal and a preset threshold; determininga discharging similarity early-warning level according to the acquired local discharging signal and a preset discharging characteristic library; determining a discharging trend early-warning level according to the change trend of the acquired local discharging signal; and determining an integral early-warning level according to at least two of the determined discharging threshold early-warning level, the discharging similarity early-warning level and the discharging trend early-warning level. With the method provided by the application, local discharging early-warning can be more accurately performed, potential risk of a fault can be timely found out, and reliable running of a power transmission line is guaranteed. The invention also provides the cable local discharging on-line monitoringdevice and a computer readable storage medium.

Description

technical field [0001] The invention relates to the field of on-line monitoring of cable partial discharge, in particular to a method and device for on-line monitoring of cable partial discharge. Background technique [0002] Under the action of high voltage and high electric field, discharge, electromagnetic force, thermal stress, hot and humid environment, harmful active gas, oil pollution, dust, etc. during the operation of electrical equipment will cause the gradual deterioration of the performance of insulating materials. At the same time, this deterioration is Irreversible and constantly accelerating. Therefore, partial discharge will occur in some weak links of insulation in high-voltage equipment under the action of local high electric field. The power transmission line is one of the important parts of the power system. The quality of its line insulation directly affects whether the power system can operate safely. Once a fault occurs, a large-scale power outage may...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 钱俊波韩叶祥张树龙姜明武
Owner SUZHOU GUANGGE EQUIP
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