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GIL insulator design method with surface conductivity two-dimensional U-type gradient distribution

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

Inactive Publication Date: 2018-09-04
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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  • GIL insulator design method with surface conductivity two-dimensional U-type gradient distribution
  • GIL insulator design method with surface conductivity two-dimensional U-type gradient distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0031] 2) Epoxy resin is processed by step curing method. The curing process is divided into two steps: first put the mold after vacuum treatment into the oven for primary curing, then demould, put it into the oven again for secondary curing, and get the product after cooling Epoxy resin pot insulators.

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

Embodiment 2

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

[0035] 2) Epoxy resin is processed by step curing method. The curing process is divided into two steps: first put the mold after vacuum treatment into the oven for primary curing, then demould, put it into the oven again for secondary curing, and get the product after cooling Epoxy resin pot insulators.

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

Embodiment 3

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

[0039] 2) Epoxy resin is processed by step curing method. The curing process is divided into two steps: first put the mold after vacuum treatment into the oven for primary curing, then demould, put it into the oven again for secondary curing, and get the product after cooling Epoxy resin pot insulators.

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

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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 of a GIL insulator with a two-dimensional U-shaped gradient distribution of surface conductance. Background technique [0002] With the rapid development of high-voltage transmission system, the insulation problem of power equipment is becoming more and more prominent, and its design and manufacture are becoming more and more important. High-voltage direct current transmission (HVDC) has significant advantages in long-distance and large-capacity power transmission, interconnection of asynchronous AC grids, power transmission on offshore platforms and isolated islands, grid connection of renewable energy power generation, and power supply expansion in large cities. Matching corresponding switchgear and transmission lines. However, existing studies and applications show that designing and fabricating safe and reliable DC GILs is still...

Claims

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Application Information

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Patent Type & Authority Applications(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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