Method for evaluating electrical performance of insulated mandrel

A technology of insulating mandrel and electrical performance, which is applied in the electrical field to achieve the effect of increasing the service life, ensuring the safety of power grid operation and low price

Inactive Publication Date: 2019-09-17
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Composite insulators are widely used in power grids. The existing statistical results show that there are more than 4,700 transmission lines using composite insulators. With the advancement of UHV DC projects, the traditional external insulation equipment with porcelain / glass as the main insulating material can no longer meet the requirements. According to the requirements of UHV DC projects, composite insulators will occupy a pivotal position in external insulation equipment

Method used

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  • Method for evaluating electrical performance of insulated mandrel
  • Method for evaluating electrical performance of insulated mandrel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The present embodiment provides a method for evaluating the electrical properties of an insulating mandrel, comprising the following steps:

[0050] (1) Dye penetration test: The microscopic interface channel inside the mandrel can be studied by the method of dye penetration test. Considering the influence of the penetration of dyeing liquid along the surface on the test results, a sheathed (umbrella) is used in the research process. The samples were subjected to dye penetration test and microscopic observation of the microstructure of the through-holes.

[0051] The length of the sample used for the test was 10 mm. The cut surface of the sample should be smoothed with a 180-grit emery cloth to ensure that both end surfaces should be clean and parallel to each other. A layer of steel or glass balls with the same diameter is placed in a container or tray, with a diameter of 1mm. Place the sample on the ball in the vertical upward direction of the fiber, and pour the dy...

Embodiment 2

[0061] The present embodiment provides a method for evaluating the electrical properties of an insulating mandrel, comprising the following steps:

[0062] (1) Dye penetration test: The microscopic interface channel inside the mandrel can be studied by the method of dye penetration test. Considering the influence of the penetration of dyeing liquid along the surface on the test results, a sheathed (umbrella) is used in the research process. The samples were subjected to dye penetration test and microscopic observation of the microstructure of the through-holes.

[0063] The length of the sample used for the test was 10 mm. The cut surface of the sample should be smoothed with a 180-grit emery cloth to ensure that both end surfaces should be clean and parallel to each other. A layer of steel or glass balls with the same diameter is placed in a container or tray, with a diameter of 2mm. Place the sample on the ball in the vertical upward direction of the fiber, and pour the dy...

Embodiment 3

[0071] The present embodiment provides a method for evaluating the electrical properties of an insulating mandrel, comprising the following steps:

[0072] (1) Dye penetration test: The microscopic interface channel inside the mandrel can be studied by the method of dye penetration test. Considering the influence of the penetration of dyeing liquid along the surface on the test results, a sheathed (umbrella) is used in the research process. The samples were subjected to dye penetration test and microscopic observation of the microstructure of the through-holes.

[0073] The length of the sample used for the test was 10 mm. The cut surface of the sample should be smoothed with a 180-grit emery cloth to ensure that both end surfaces should be clean and parallel to each other. Place a layer of steel or glass balls with the same diameter in a container or tray, with a diameter of 1.5mm. Place the sample on the ball in the vertical upward direction of the fiber, and pour the dyei...

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Abstract

The invention provides a method for evaluating the electrical performance of an insulated mandrel. The method for evaluating the electrical performance of the insulated mandrel comprises the following steps: testing the pores of the insulated mandrel; and evaluating the electrical performance of the insulated mandrel according to the test results. The method for evaluating the electrical performance of the insulated mandrel can satisfy the further evaluation of the electrical performance of the insulated mandrel of the national standard, can screen out the insulated mandrel with better electrical performance, and can increase the service life of the insulated mandrel in practical applications, thereby ensuring the safe operation of the power grid.

Description

technical field [0001] The invention belongs to the electrical field, and relates to a method for evaluating the electrical performance of an insulating mandrel. Background technique [0002] Composite insulators are an important component of transmission lines. Since the 1980s, composite insulators have been used for 30 years. As of 2011, the number of composite insulators above 110kV has exceeded 5 million. Composite insulators are widely used in power grids. Existing statistical results show that there are more than 4,700 transmission lines using composite insulators. With the advancement of UHV DC projects, the traditional external insulation equipment with porcelain / glass as the main insulating material can no longer meet the requirements. According to the requirements of UHV DC engineering, composite insulators will occupy a pivotal position in external insulation equipment. [0003] At present, with the great improvement of composite material manufacturing technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N23/046
CPCG01N15/08G01N15/088G01N23/046
Inventor 王婷婷成立张福增曾向君廖一帆
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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