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Design method of GIL (gas insulated transmission line) insulator with surface conductance two-dimensional Lambda-shaped gradient distribution

A technology of surface conductance and gradient distribution, applied in insulators, circuits, electrical components, etc., can solve problems such as discharge, equipment failure, electric field distortion, etc., and achieve the effect of optimizing material structure, improving performance, and improving performance

Inactive Publication Date: 2018-08-28
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 of GIL (gas insulated transmission line) insulator with surface conductance two-dimensional Lambda-shaped gradient distribution
  • Design method of GIL (gas insulated transmission line) insulator with surface conductance two-dimensional Lambda-shaped 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) Carry out a linear gradient design on the surface of the pot insulator, divide the surface of the insulator from the inside to the outside into five closely connected annular areas, and the designed surface conductance first increases and then decreases: the sample is placed in the fluorination treatment equipment, according ...

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) Carry out a linear gradient design on the surface of the pot insulator, divide the surface of the insulator from the inside to the outside into five closely connected annular areas, and the designed surface conductance first increases and then decreases: the sample is placed in the fluorination treatment equipment, according ...

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) Carry out a linear gradient design on the surface of the pot insulator, divide the surface of the insulator from the inside to the outside into five closely connected annular areas, and the designed surface conductance first increases and then decreases: the sample is placed in the fluorination treatment equipment, according ...

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Abstract

The invention discloses a design method of a GIL (gas insulated transmission line) insulator with surface conductance two-dimensional Lambda-shaped gradient distribution. The method mainly comprises the following steps that: an epoxy resin insulation test piece is firstly prepared; the epoxy resin is treated through using a stepped curing method; linear gradient design is performed on the surfaceof the epoxy resin basin type insulator: the surface of the insulator is divided into five closely connected annular regions from inside to outside, and the surface conductance of the insulator is designed to increase at first and then decrease; and the test piece is placed in a fluorination treatment device, and different positions of the test piece are treated for different time according to a monotonic distribution gradient, so that a basin type insulator with surface conductance gradient distribution can be obtained. Gradient fluorination treatment is performed on the epoxy resin, so thatsurface conductance two-dimensional Lambda-shaped gradient distribution can be obtained, and therefore, the performance of the insulator can be 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 ∧-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 stil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B19/00H01B19/04
CPCH01B19/00H01B19/04
Inventor 李进杜伯学冉昭玉王泽华梁虎成
Owner TIANJIN UNIV
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