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Design method for gil insulators with two-dimensional linear gradient distribution of surface conductance

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

Inactive Publication Date: 2019-12-31
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 linear gradient distribution of surface conductance
  • Design method for gil insulators with two-dimensional linear gradient distribution of surface conductance

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 insulator surface from the inside to the outside into five closely connected annular areas, and the designed surface conductance decreases in turn: place the sample in the fluorination treatment equipment, and follow the monotonous distribution...

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 insulator surface from the inside to the outside into five closely connected annular areas, and the designed surface conductance decreases in turn: place the sample in the fluorination treatment equipment, and follow the monotonous distribution...

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 insulator surface from the inside to the outside into five closely connected annular areas, and the designed surface conductance decreases in turn: place the sample in the fluorination treatment equipment, and follow the monotonous distribution...

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Abstract

The invention discloses a GIL insulator design method with the surface conductance two-dimensional linear gradient distribution. The method mainly comprises the following steps: firstly, manufacturingan epoxy resin insulation sample; secondly, processing the sample by using the epoxy resin based on the stepped curing method; finally, carrying out the linear gradient design for the surface of an epoxy resin basin type insulator: dividing the surface of the insulator into five annular areas which are tightly connected from inside to outside and the designed surface conductivities of the five areas are reduced in sequence; placing the sample into fluorination treatment equipment, and obtaining the basin type insulator with the gradient distribution of surface conductance at different positions and processed for different time durations according to the monotonous distribution gradient. According to the invention, the surface conductance two-dimensional linear gradient distribution is obtained by performing gradient fluorination treatment on the epoxy resin so as to improve the performance of the insulator.

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 linear 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 a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B17/50H01B19/04
CPCH01B17/50H01B19/04
Inventor 冉昭玉杜伯学李进王泽华梁虎成
Owner TIANJIN UNIV
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