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Design method for GIL insulators with two-dimensional U-shaped gradient distribution of surface conductance

A technology of surface conductance and gradient distribution, applied in the field of high-voltage equipment manufacturing, can solve problems such as equipment failure, electric field distortion, discharge, etc., to achieve the effect of improving performance, improving performance, and optimizing material structure

Inactive Publication Date: 2020-01-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing studies and applications show that it is still a challenge to design and fabricate safe and reliable DC GILs.
During the long-term operation of the insulator under DC conditions, due to the rapid change of the dielectric parameters, the electric field in the local area will be distorted, causing discharge and insulation aging, which may lead to equipment failure

Method used

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  • Design method for GIL insulators with two-dimensional U-shaped gradient distribution of surface conductance
  • Design method for GIL insulators with two-dimensional U-shaped gradient distribution of surface conductance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Add epoxy resin, curing agent and alumina into the mixing tank according to the ratio of 100:38:330, the temperature is 130 ° C, start the motor stirring, vacuum degassing; push the preheated mold into the pouring tank, carry out Evacuation treatment; pour the mixed epoxy resin mixed material into the mold through the pouring equipment.

[0031] 2) The epoxy resin is treated by the step curing method. The curing process is divided into two steps: first, put the vacuum-treated mold into the oven for primary curing, then demold it, put it into the oven again for secondary curing, and then cool it to obtain Epoxy basin insulators.

[0032] 3) The U-shaped gradient design is carried out on the surface of the basin-type insulator, and the surface of the insulator is divided into five closely connected annular regions from the inside to the outside, and the designed surface conductance first decreases and then increases. Place the sample in the fluorination treatment equi...

Embodiment 2

[0034] 1) Add epoxy resin, curing agent and alumina into the mixing tank according to the ratio of 100:38:330, the temperature is 130 ° C, start the motor stirring, vacuum degassing; push the preheated mold into the pouring tank, carry out Evacuation treatment; pour the mixed epoxy resin mixed material into the mold through the pouring equipment.

[0035] 2) The epoxy resin is treated by the step curing method. The curing process is divided into two steps: first, put the vacuum-treated mold into the oven for primary curing, then demold it, put it into the oven again for secondary curing, and then cool it to obtain Epoxy basin insulators.

[0036] 3) The U-shaped gradient design is carried out on the surface of the basin-type insulator, and the surface of the insulator is divided into five closely connected annular regions from the inside to the outside, and the designed surface conductance first decreases and then increases. Place the sample in the fluorination treatment equi...

Embodiment 3

[0038] 1) Add epoxy resin, curing agent and alumina into the mixing tank according to the ratio of 100:38:330, the temperature is 130 ° C, start the motor stirring, vacuum degassing; push the preheated mold into the pouring tank, carry out Evacuation treatment; pour the mixed epoxy resin mixed material into the mold through the pouring equipment.

[0039] 2) The epoxy resin is treated by the step curing method. The curing process is divided into two steps: first, put the vacuum-treated mold into the oven for primary curing, then demold it, put it into the oven again for secondary curing, and then cool it to obtain Epoxy basin insulators.

[0040] 3) The U-shaped gradient design is carried out on the surface of the basin-type insulator, and the surface of the insulator is divided into five closely connected annular regions from the inside to the outside, and the designed surface conductance first decreases and then increases. Place the sample in the fluorination treatment equi...

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Abstract

The invention discloses a GIL insulator design method with surface conductivity two-dimensional U-type gradient distribution. The GIL insulator design method with surface conductivity two-dimensionalU-type gradient distribution mainly comprises following steps: an epoxy resin insulation sample is prepared; the epoxy resin is subjected to gradient solidification treatment; and at last linear gradient design is adopted by an epoxy resin basin-type insulator surface; the surface of the insulator is divided into five annular regions tightly connected from inside to outside, the surface conductivity is designed to reduce firstly and increase successively; the sample is introduced into a fluorination treatment equipment, and at different parts, monotone distribution gradient treatment time is designed to be different so as to obtain the basin-type insulator with surface conductivity gradient distribution. According to the GIL insulator design method, surface conductivity two-dimensional U-type gradient distribution is obtained via gradient fluorination treatment of epoxy resin, and insulator performance is improved.

Description

technical field [0001] The invention belongs to the field of high-voltage equipment manufacturing, and in particular relates to a design method for a GIL insulator with a two-dimensional U-shaped gradient distribution of surface conductance. Background technique [0002] With the rapid development of high-voltage power transmission systems, the insulation problem of power equipment has become increasingly prominent, and its design and manufacture are becoming more and more important. High-voltage direct current (HVDC) has significant advantages in long-distance large-capacity power transmission, asynchronous AC grid interconnection, offshore platform and island power transmission, renewable energy power generation grid connection, power supply capacity expansion in large cities, etc. Matching corresponding switchgear and transmission lines. However, existing research and applications show that designing and fabricating safe and reliable DC GILs remains a challenge. During ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/12C08L63/00
CPCC08J7/126C08J2363/00
Inventor 冉昭玉杜伯学李进王泽华梁虎成
Owner TIANJIN UNIV
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