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Electrocorrosion acceleration test method for DC porcelain insulator iron cap

A technology of porcelain insulators and test methods, which is applied in the fields of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve the problems of no test methods, etc., and achieve improved operation safety, good equivalence and repeatability, The effect of strict steps

Active Publication Date: 2015-04-15
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

After the occurrence of large-area iron cap electrocorrosion, relevant tests are urgently needed to study the development mechanism and suppression measures of electrocorrosion, but there is no test method for reference at present

Method used

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  • Electrocorrosion acceleration test method for DC porcelain insulator iron cap
  • Electrocorrosion acceleration test method for DC porcelain insulator iron cap
  • Electrocorrosion acceleration test method for DC porcelain insulator iron cap

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Embodiment

[0025] The design method of the iron cap zinc ring of the DC porcelain insulator of the present invention, concrete implementation steps are as follows figure 1 shown

[0026] 1) Clean the dirt on the surface of the porcelain insulator, place it in a cool place to dry, and avoid direct sunlight;

[0027] 2) In order to facilitate the accelerated electrical corrosion test of the iron cap, the copper sheet is attached to the surface of the insulator with super glue, and the creepage distance between the lower surface of the insulator and part of the upper surface is shorted. The distance between the copper sheet electrode and the iron cap should be 5~ 8cm, this distance refers to the creepage value from the copper sheet electrode to the iron cap along the surface of the insulator. A sealant needs to be coated on the copper electrode to prevent the copper electrode from detaching from the surface of the insulator under the infiltration of water flow.

[0028] 3) if figure 2 A...

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Abstract

The invention relates to an electrocorrosion acceleration test method for a DC (direct current) porcelain insulator iron cap. The method comprises the following steps: 1, cleaning the dirt on the surface of a porcelain insulator, and placing in a shade for drying and avoiding direct sunlight; 2, sticking a copper sheet to the surface of the porcelain insulator, realizing short circuit for creepage distances of the lower surface and the partial upper surface of the porcelain insulator, and forming a certain distance between the electrode of the copper sheet and the iron cap; 3, placing the porcelain insulator stuck with the copper sheet in a liquid environment simulation chamber, and adopting a dripping method to test, wherein the water drops above the porcelain insulator are dripped to gather in the gap between the iron cap on the lower side of the porcelain insulator and a porcelain surface and form a more concentrated liquid contact point; 4, selecting annual average leakage quantity of electric charge as a basis and testing; and 5, dissecting the electrocorrosion part of the porcelain insulator iron cap, and measuring the length, width, depth and corrosion direction of the electrocorrosion area. According to the invention, the testing steps are rigorous, the practicability is strong, the testing result has better equivalence with the electrocorrosion situation of the porcelain insulator on site, and the electrocorrosion acceleration test method can be widely applicable to the experimental research on the electrocorrosion problem of the DC porcelain insulator iron cap.

Description

technical field [0001] The invention relates to an accelerated electric corrosion test method for an iron cap of a DC porcelain insulator, which belongs to the innovative technology of the accelerated electric corrosion test method for an iron cap of a DC porcelain insulator. Background technique [0002] Due to the unbalanced distribution of primary energy and composites in China, most of my country's energy resources are in the west, while power demand is concentrated in the east. It is inevitable to transport electricity from the west to the east over long distances. From the perspective of the national power grid, power transmission from west to east, mutual supply between north and south, and national networking are the general policy for the development of my country's power grid, and also the basic strategic goal of the construction of the national energy industry in the 21st century. UHV DC transmission is positioned for long-distance and large-capacity transmission ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00
Inventor 张福增宋磊罗凌李锐海王黎明
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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