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High-voltage cable early warning system and method

A high-voltage cable, high-frequency current technology, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of large cable capacitance, long cable distribution, loss, etc., to achieve the effect of accurate early warning information

Pending Publication Date: 2022-03-11
WENSHANG POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] High-voltage cables have little impact on the surrounding environment during operation, and the cable has a large capacitance, so they are widely used. At present, high-voltage cables are mainly XLPE cables, and the deterioration of the cable insulation may cause sudden failure of the power grid. cause direct and indirect loss
[0004] At present, there are shock wave test methods, partial discharge detection methods, etc. for the detection of cables. However, due to the generally long distribution of cables, it is difficult to perform all detections. It is not possible to effectively discover and locate the insulation degradation problems of high-voltage cables. , resulting in the inability to deal with the problematic high-voltage cables in a timely manner

Method used

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  • High-voltage cable early warning system and method

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Embodiment 1

[0037] Embodiment one, such as figure 1 Shown, a kind of high voltage cable warning method of the present invention comprises the following steps:

[0038] Obtain the high-frequency current signal flowing through the high-voltage cable protective layer detected by the high-frequency current sensor set on the high-voltage cable of the monitoring circuit;

[0039] Preprocessing the high-frequency current signal;

[0040] If the high-frequency current value after preprocessing exceeds the preset value, it is determined that the high-voltage cable is abnormal;

[0041] At the same time, commands are sent to the image acquisition device and the positioning device to perform image acquisition and image processing, locate the location of the abnormal situation, and send the abnormal information and positioning information to the early warning unit for alarm.

[0042] Specifically, the high-frequency current sensor can be arranged on the high-voltage cable of the detection circuit b...

Embodiment 2

[0060] This embodiment provides a high-voltage cable early warning system, which includes:

[0061] A high-frequency current sensor, which is used to obtain the high-frequency current value flowing through the protective layer of the high-voltage cable;

[0062] The image acquisition device is used to acquire the image of the high-voltage cable and send the acquired image to the monitoring terminal;

[0063] The positioning device acquires the positioning information and sends the positioning information to the monitoring terminal;

[0064] The monitoring terminal is used to process the collected high-frequency current value of the protective layer of the high-voltage cable, and is also used to process the collected image of the high-voltage cable, and associate the image information of the high-voltage cable with the positioning information;

[0065] The early warning unit is used to receive information from the monitoring terminal and issue early warning information.

[00...

Embodiment 3

[0078] This embodiment provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the steps in the high-voltage cable early warning method described in Embodiment 1 are implemented.

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Abstract

The invention discloses a high-voltage cable early warning method. The method comprises the following steps: acquiring a high-frequency current signal which is detected by a high-frequency current sensor arranged on a high-voltage cable of a monitoring loop and flows through a high-voltage cable protection layer; preprocessing the high-frequency current signal; if the preprocessed high-frequency current value exceeds a preset value, judging that the high-voltage cable is abnormal; meanwhile, a command is sent to the image acquisition device and the positioning device, image acquisition and image processing are carried out, the position of an abnormal condition is positioned, and abnormal information and positioning information are sent to the first early warning unit for alarming. According to the method, the high-voltage cable is further judged and positioned in a high image acquisition positioning mode, so that the abnormal high-voltage cable can be positioned, and a processor can accurately process the abnormal part of the high-voltage cable.

Description

technical field [0001] The invention belongs to the technical field related to high-voltage cables, and in particular relates to a high-voltage cable early warning system and method. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] High-voltage cables have little impact on the surrounding environment during operation, and the cable has a large capacitance, so they are widely used. At present, high-voltage cables are mainly XLPE cables, and the deterioration of the cable insulation may cause sudden failure of the power grid. result in direct and indirect losses. [0004] At present, there are shock wave test methods, partial discharge detection methods, etc. for the detection of cables. However, due to the generally long distribution of cables, it is difficult to perform all detections. It is not possible to effectively discover and locate ...

Claims

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 袁宝赵勇肖炳秀陈圣芳刘宁王汝强魏波吴耐菊张瑞璟孟健刘钦同吕慧丽赵啸马欣刘雪亭李滕滕辛琨王坤丁淑萍
Owner WENSHANG POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO