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Power transmission cable defect judgment device and method based on electric field analysis

A technology of power transmission cable and judgment device, which is applied in the direction of testing dielectric strength, etc., can solve problems such as poor judgment efficiency and power transmission cable defects, and achieves the effect of saving time and effort in steps and high efficiency.

Pending Publication Date: 2022-04-15
STATE GRID HEBEI ELECTRIC POWER CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a transmission cable defect judgment device and method based on electric field analysis to solve the technical problem of poor judgment efficiency in the work of judging cable defects

Method used

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  • Power transmission cable defect judgment device and method based on electric field analysis
  • Power transmission cable defect judgment device and method based on electric field analysis
  • Power transmission cable defect judgment device and method based on electric field analysis

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Effect test

Embodiment 1

[0055] like figure 1 As shown, the present invention discloses a transmission cable defect judgment device based on electric field analysis, including a spectrum analyzer, a computer, and an acquisition feature library module and a detection module running on the computer. The spectrum analyzer is wirelessly connected to the computer and one-way communication. Wherein, the spectrum analyzer, the computer itself and the corresponding communication connection technology are existing technologies and will not be repeated here.

[0056] Obtaining the feature library module is a program module, which is used for the processor of the computer to obtain a feature library composed of cable electric field distribution line diagrams. The feature library includes normal cable electric field distribution line diagrams and defective cable electric field distribution line diagrams. The figure includes the electric field distribution line diagrams of the first to third types of defects.

...

Embodiment 2

[0067] like figure 2 As shown, the present invention discloses a method for judging defects of transmission cables based on electric field analysis, based on the device of Embodiment 1, comprising the following steps:

[0068] S1 obtains the feature library

[0069] Based on the finite element module, the processor of the computer obtains a feature library composed of cable electric field distribution line diagrams, the feature library includes normal cable electric field distribution line diagrams and defective cable electric field distribution line diagrams, and the defect cable electric field distribution line diagrams include the first to The electric field distribution line diagram of the third type of defect.

[0070] The finite element module is a program module, which is used to establish the cable model, set the electrostatic field, add excitation, mesh division, solve and obtain the electric field distribution diagram, draw a line along the radial direction with th...

Embodiment 3

[0078] The invention discloses a power transmission cable defect judgment device based on electric field analysis, which includes a memory, a processor, and a computer program stored in the memory and operable on the processor. When the processor executes the computer program, the implementation of Embodiment 2 step.

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Abstract

The invention discloses a power transmission cable defect judgment device and method based on electric field analysis, and relates to the technical field of cable defect judgment. The device comprises a feature library obtaining module and a detection module, the feature library obtaining module is used for a processor to obtain a feature library composed of cable electric field distribution diagrams, the feature library comprises a normal cable electric field distribution diagram and a defective cable electric field distribution diagram, and the detection module is used for the processor to obtain an electric field distribution diagram of a to-be-detected cable. The method comprises the following steps: S1, acquiring the feature library, S2, detecting, acquiring the electric field distribution diagram of the to-be-detected cable through a processor, classifying the electric field distribution diagram of the to-be-detected cable based on the feature library, and acquiring the state of the to-be-detected cable. The efficiency of judging cable defects is high.

Description

technical field [0001] The invention relates to the technical field of cable defect judgment, in particular to a device and method for detecting a defect of a power transmission cable based on electric field analysis. Background technique [0002] High-voltage DC cable transmission is one of the main forms of power transmission. Cross-linked polyethylene, the English name is cross-linkedpolyethylene, abbreviated as XLPE. The cable has become the mainstream of high-voltage DC power cables due to its good electrical and mechanical properties. In recent years, the manufacturing technology of high-voltage DC cables has developed rapidly, but the research on its insulation state detection and fault diagnosis and other operation and maintenance technologies is relatively lagging behind. Partial discharge, the English name is Partial Discharges, abbreviated as PD, which is one of the main forms that lead to the deterioration and aging of power cable insulation. At the same time, p...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 李乾刘玲玉段志国韩广冯俊国孙晓云张珺刘保安郑海清刘浩然郭康王思莹吴灏王淇锋
Owner STATE GRID HEBEI ELECTRIC POWER CO LTD
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