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A kind of anti-corona coating and preparation method thereof

A coating and electricity reduction technology, applied in the direction of conductive coatings, coatings, etc., can solve the problems of strong local field and limited anti-corona effect, achieve good anti-corona effect, increase interface free energy, and reduce corona discharge The effect of the probability of

Active Publication Date: 2022-02-15
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing anti-corona coatings for transmission lines, conductive agents (such as carbon black, carbonized skeleton structure, etc.) are added to prepare anti-corona coatings. Halo effect is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) In terms of parts by mass, take 50 parts of fluorine-modified hydroxyl-terminated polydimethylsiloxane, 5 parts of methyl silicone oil and 10 parts of fumed silica powder into a strong disperser, heat up to 130 ° C, and Stir for 60 minutes at a rotational speed of 2000 r / min, keep dehydration under vacuum for 2 hours, and then cool the first mixed product in the disperser to room temperature.

[0032] (2) Transfer the first mixture to a grinding machine, add 10 parts of bismuth selenide for grinding, and prepare the second mixed product after the fineness of the powder reaches 10 um.

[0033] (3) Transfer the obtained second mixed product to a strong disperser, add 5 parts of methyltriacetoxysilane, 0.5 parts of dibutyltin dilaurate and 100 parts of xylene in batches, at 1000-2000r / min After the rotation speed is fully mixed for 60 minutes, vacuumize for 30 minutes, and the anti-corona coating can be obtained by filling in cans.

Embodiment 2

[0037] The transmission line anti-corona reduction coating prepared in Example 1 and Comparative Example 1 was coated on the transmission line, and the corona discharge test of the AC stranded wire was carried out based on the small corona cage, and the corona initiation process was recorded with an ultraviolet imager. The stranded wire used in the test is LGJ400 / 50 steel-cored aluminum stranded wire. The diameter of the stranded wire is 27.63 mm. The test voltage is 110 kV. The corona inception voltage records are shown in Table 1. As can be seen from Table 1, coating the transmission line anti-corona coating made by the embodiment of the present application / corona reduction coating, the corona inception voltage increases by 20kV, compared with the corona reduction coating of adding carbon black conductive agent, the corona inception voltage is improved, and the corona reduction coating is reduced. Probability of corona discharge. In the anti-corona coating prepared in Exampl...

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PUM

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Abstract

The application belongs to the technical field of corona-reducing coatings. The application provides an anti-corona coating and a preparation method thereof, the anti-corona coating includes film-forming material, plasticizer, reinforcing agent, additive, crosslinking agent, catalyst and solvent, wherein the additive has Nonlinear conduction behavior. The surface resistivity of the additive decreases with the increase of the applied electric field intensity, which can automatically adjust and improve the distribution of the electric field on the surface of the line. Voltage. When mixed with other components, the surface of the additive is infiltrated, forming a conductive particle-polymer interface layer, which increases the interfacial free energy of the system, thereby reducing the threshold for the formation of a conductive path, which is conducive to the formation of a stable conductive network and reduces the corona probability of discharge.

Description

technical field [0001] The application belongs to the technical field of corona-reducing coatings, and in particular relates to an anti-corona-reducing coating and a preparation method thereof. Background technique [0002] Under normal circumstances, when the electric field strength on the surface of the transmission line conductor exceeds 20-30kV / cm, you will hear the sound of "sizzling" discharge, smell the smell of ozone, and you can also see blue-purple fluorescence around the electrode at night. It is the corona discharge of the transmission line. Corona discharges can cause a range of hazards such as radio interference, audible noise and corona loss. [0003] At present, to reduce the corona loss of ultra-high voltage wires, methods such as increasing the diameter of the wire, increasing the number of splits, or increasing the height of the tower are often used. Although these conventional methods can achieve the effect of reducing corona loss, the investment itself ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/08C09D7/61C09D7/65C09D7/63C09D5/24
CPCC09D183/08C09D7/61C09D7/65C09D7/63C09D5/24C08L2203/202C08L2205/02C08L83/04C08K13/02C08K3/36C08K3/30C08K5/5419
Inventor 彭磊范圣平盘思伟付强
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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