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Method, device and equipment for determining cable shielding layer fault and storage medium

A technology for determining the cable shielding layer and its method, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve problems such as grounding faults of the cable shielding layer, affecting the normal operation of power cables, and being unable to know the operating status of the cable shielding layer. The effect of convenient and quick monitoring

Inactive Publication Date: 2019-07-23
山东鲁源电气股份有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The overvoltage generated in the above situations may break down the outer shielding layer of the cable, causing multi-point grounding faults on the cable shielding layer, seriously affecting the normal operation of the power cable, and even greatly shortening the service life of the cable.
However, due to the inability to know the operating status of the cable shielding layer, it is impossible to take effective measures before the fault occurs

Method used

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  • Method, device and equipment for determining cable shielding layer fault and storage medium
  • Method, device and equipment for determining cable shielding layer fault and storage medium
  • Method, device and equipment for determining cable shielding layer fault and storage medium

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Embodiment Construction

[0020] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail in conjunction with specific embodiments and with reference to the accompanying drawings.

[0021] It should be noted that all the expressions "first", "second", "third" and "fourth" in the embodiments of the present invention are used to distinguish two entities with the same name but not the same or not the same parameter. It can be seen that "first", "second", "third", and "fourth" are only for convenience of expression, and should not be construed as limiting the embodiments of the present invention, and subsequent embodiments will not describe them one by one.

[0022] figure 1 It is a flowchart of a method for determining a cable shielding layer fault according to an exemplary embodiment. The grounding and non-grounding ends of the cable shielding layer form a loop through a current discharge circuit (here...

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Abstract

The invention discloses a method, device and equipment for determining a cable shielding layer fault and a storage medium, which are used for solving the problem that the cable shielding layer fault cannot be known in the related technology. The grounding end and the non-grounding end of the cable shielding layer form a loop through a current discharge circuit, a current sensor is arranged on theloop, and the cable shielding layer fault determination method comprises the following steps: receiving current data of the grounding end and the non-grounding end, which are acquired by the current sensor; determining the state of the cable shielding layer according to the current data, wherein the state of the cable shielding layer at least comprises one of the following: the cable shielding layer being short-circuited, the cable shielding layer being broken, and the cable shielding layer leaking electricity. The method for determining the cable shielding layer fault can conveniently and quickly acquire the fault of the cable shielding layer.

Description

Technical field [0001] The present invention relates to the technical field of cable fault detection, in particular to a method, device, equipment and storage medium for determining the cable shielding layer fault. Background technique [0002] At present, power cables with voltage levels above 35kV, 66kV, 110kV and 110kV are single-core cables. One end of the cable metal shielding layer (hereinafter also referred to as cable shielding layer) is triple-connected and grounded, and the other end is not grounded. When lightning waves or cables When the internal overvoltage flows along the cable core, the non-grounded end of the cable shielding layer will have a higher impulse overvoltage; or when the system short-circuit accident current flows through the cable core, the ungrounded end of the shielding layer will also appear high. Power frequency induced overvoltage; or when the power supply distance of the cable is long and the cable shielding layer is aging, high power frequency i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 王睿付守滨庞怀江陈涛
Owner 山东鲁源电气股份有限公司
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