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Composite insulator defect detection method

A composite insulator and defect detection technology, applied in the field of defect detection, can solve problems such as insignificant temperature rise and achieve the effect of simplifying calculations

Pending Publication Date: 2021-11-02
CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the fact that the temperature rise of composite insulators with defects is not obvious during operation, the present invention provides a composite insulator defect detection method, which makes the infrared detection results more intuitive and effectively shows the position of defect points, specifically through the following steps: :

Method used

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Embodiment

[0038] In this embodiment, a composite insulator defect detection method includes the following steps:

[0039] T1: Use the infrared instrument to obtain the infrared image of the composite insulator string;

[0040] T2: Read the temperature distribution of each composite insulator in the composite insulator string through infrared images, but due to the complex temperature distribution of each composite insulator, the temperature distribution function is difficult to fit, and the on-site processing is very difficult. In order to make this patent application more practical properties, select the maximum temperature of each composite insulator As a function of its temperature distribution, this data can more effectively find out the defective composite insulator with the largest temperature rise; where, i∈(1,n), n is the number of composite insulators in the composite insulator string;

[0041] T3: Maximum temperature for each composite insulator Find the corresponding surf...

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Abstract

The invention discloses a composite insulator defect detection method. The method comprises the following steps: T1, acquiring an infrared image of a composite insulator string by using an infrared instrument; T2, reading the maximum temperature value of each composite insulator in the composite insulator string through the infrared image, wherein i belongs to (1, n), and n is the number of the composite insulators in the composite insulator string; T3, solving a corresponding curved surface score Ki according to the maximum temperature value of each composite insulator, wherein S is the area of the side surface of the single composite insulator umbrella skirt sheath; T4, obtaining the difference value [delta]Ti of the corresponding curved surface fractions of every two adjacent composite insulators, wherein [delta]Ti=Ki+1-Ki; and T5, judging whether defects exist in the composite insulator string or not according to the absolute values of all [delta]Ti and / or the positive and negative values of all [delta]Ti. According to the method, the curved surface integral technology is utilized, the temperature detected by infrared is integrated along the side surface of the composite insulator, and the integral result of the degraded composite insulator is greatly increased compared with the integral result of a normal insulator.

Description

technical field [0001] The invention relates to defect detection, in particular to a defect detection method for composite insulators. Background technique [0002] Composite insulators are composed of core rods, shed sheaths and connecting fittings. The mandrel is made of fiberglass, which is used to provide the mechanical properties of the insulator. The sheath is connected to the surface of the mandrel by an adhesive to protect the mandrel. The connecting fittings are located at both ends of the composite insulator to connect the composite insulator to the tower. The role of metal fittings connected. [0003] Insulators play two basic roles in overhead transmission lines, supporting wires and preventing current from returning to ground. Once the insulator fails due to various electromechanical stresses caused by changes in the environment and electrical load conditions, it will damage the service life and operating life of the entire line. Composite insulators operate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/72G06F17/10
CPCG01N25/72G06F17/10
Inventor 杜永永李倩竹熊杰方铖常斌峰周福王思韬陈锡成杨阳梁定才赖古军黄满意罗定春刘刚寇志豪蔡林徐永红肖利祥陈刚
Owner CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER
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