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Insulator surface structure modification method and application

A surface structure and insulator technology, which is applied in the field of surface structure modification of insulators, can solve problems such as easy peeling off of the coating, electric field distortion, etc., and achieve the effect of promoting popularization and application, restraining movement, and remarkable effects

Active Publication Date: 2021-11-09
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The capture trap has a certain trapping effect on the moving metal particles in GIL / GIS, but the introduction of particle traps will cause local electric field distortion in high-voltage DC GIL / GIS
The film on the surface of the electrode has a certain inhibitory effect on the phenomenon of metal particles, but the film is easy to fall off
The existing high-voltage direct current GIL / GIS metal particle motion suppression measures all have certain limitations, so it is necessary to introduce a new method to suppress the metal particle motion in high-voltage direct current GIL / GIS

Method used

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  • Insulator surface structure modification method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The specific surface uniform fluorination treatment process of basin type insulators is as follows:

[0023] (1) Before installing the high-voltage DC GIL / GIS pot insulator, place the epoxy resin pot insulator in a vacuum fluorination reactor, and fill the reactor with a mixed gas with a volume ratio of 1:6 fluorine gas and nitrogen gas to react The conditions are: the gas temperature is 10°C, the gas pressure is 0.04Mpa, and the epoxy resin pot insulator is modified for 15 minutes.

[0024] (2) Using the DC GIL / GIS system, analyze the inhibitory effect of the high-conductivity surface-modified pot-type insulator under different operating conditions on its convex surface and metal particles at different positions from the insulator.

[0025] (3) According to the experimental results, compared with ordinary GIL basin insulators, GIL / GIS basin insulators with modified surface structure have a significant inhibitory effect on the movement of metal particles at different po...

Embodiment 2

[0027] (1) Before installing the high-voltage DC GIL / GIS basin insulator, place the epoxy resin basin insulator in a vacuum fluorination reactor, and fill the reactor with a mixed gas of fluorine and nitrogen at a volume ratio of 1:10 to react The conditions are: the gas temperature is 50°C, the gas pressure is 0.1Mpa, and the epoxy resin pot insulator is subjected to surface structure modification treatment for 30 minutes.

[0028] (2) Using the DC GIL / GIS system, analyze the inhibitory effect of the high-conductivity surface-modified pot-type insulator under different operating conditions on its convex surface and metal particles at different positions from the insulator.

[0029] (3) According to the experimental results, compared with ordinary GIL basin insulators, GIL / GIS basin insulators with modified surface structure have a significant inhibitory effect on the movement of metal particles at different positions, see figure 2 .

Embodiment 3

[0031] (1) Before installing the high-voltage DC GIL / GIS pot insulator, place the epoxy resin pot insulator in a vacuum fluorination reactor, and fill the reactor with a mixed gas of fluorine gas and argon gas at a volume ratio of 1:1. The reaction conditions are: the gas temperature is 50°C, the gas pressure is 0.01Mpa, and the epoxy resin pot insulator is modified for 60 minutes.

[0032] (2) Using the DC GIL / GIS system, analyze the inhibitory effect of the high-conductivity surface-modified pot-type insulator under different operating conditions on its convex surface and metal particles at different positions from the insulator.

[0033] (3) According to the experimental results, compared with ordinary GIL basin insulators, GIL / GIS basin insulators with modified surface structure have a significant inhibitory effect on the movement of metal particles at different positions, see figure 2 .

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Abstract

The invention discloses an insulator surface structure modification method and application. The method mainly comprises the following steps of (1) before a high-voltage direct-current GIL / GIS epoxy resin insulator (including a basin-type insulator / a post insulator) is installed, placing the epoxy resin insulator in a reaction kettle, filling the reaction kettle with a mixed gas of fluorine and an inert gas (with a volume ratio being 1:10-1:1), controlling the temperature of the reaction gas to be 10-50 DEG C and the pressure of the reaction kettle to be 0.01-0.1 MPa, and carrying out surface structure modification treatment on the epoxy resin basin-type insulator for 10-60 minutes to obtain the epoxy resin insulator with the surface conductivity of 5.8*10 <-15>-6.5*10 <-13> S. By utilizing a basin-type insulator surface structure modification technology, the surface charge distribution of the high-voltage direct-current GILbasin-type insulator under an operation condition is optimized, the axial gradient force required for metal particles in the high-voltage direct-current GIL / GIS to move towards an insulation weak part is reduced, the suppression of a metal particle lifting phenomenon in the high-voltage direct-current GIL / GIS is realized, and the method is of great significance in improving the insulation performance and reliability of a high-voltage direct-current GIL power transmission system.

Description

technical field [0001] The invention relates to the field of high-voltage power transmission in electrical engineering, in particular to a method and application for modifying the surface structure of an insulator. Background technique [0002] The movement of metal particles in the pipeline during the operation of HVDC GIL / GIS can easily cause insulation faults such as air gap breakdown, partial discharge, and flashover along the surface. Among them, the metal particles moving near the pot insulator or post insulator in HVDC GIL / GIS have the greatest influence on the insulation performance of HVDC GIL / GIS, and the surface charge accumulation of epoxy resin insulators is extremely uneven under long-term operation conditions, which has great influence on the surrounding The metal particles in the insulator generate an axial gradient force of the electric field moving toward the surface of the insulator, so the metal particles near the insulator are easy to lift and move towar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/50H01B19/04
CPCH01B19/04H01B17/50Y02E60/60
Inventor 李进王禹淮杜伯学梁虎成王雨帆赵仁勇董佳楠姚航
Owner TIANJIN UNIV
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