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Suppression method for partial discharge at flange of GIS/GIL supporting insulator

A technology for supporting insulators and partial discharges, applied in insulators, processing data acquisition/processing, circuits, etc., can solve problems such as difficulty in hindering the movement of micron-level particles, and achieve high-precision manufacturing, good compatibility, and interface bonding strength high effect

Active Publication Date: 2021-10-01
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The R arc-shaped metal shielding on the flange can prevent the metal particles from moving into the air gap on both sides of the supporting insulator, but this method brings additional processing procedures on the one hand, and it is difficult to prevent the movement of micron-sized particles
Therefore, comprehensive and effective metal particle suppression methods have become the bottleneck in the development of GIS / GIL equipment

Method used

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  • Suppression method for partial discharge at flange of GIS/GIL supporting insulator
  • Suppression method for partial discharge at flange of GIS/GIL supporting insulator
  • Suppression method for partial discharge at flange of GIS/GIL supporting insulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Example 1: 110KV disk support insulator

[0077] 1) Optimization of dielectric parameters of the insulator flange side

[0078] The two-dimensional axisymmetric structure of 110kV disk support insulator is like figure 2 (a) shown, in order to optimize the dielectric constant, support the root of the insulator 1 The area is a domain-based domain, and the arrow is an optimized target area Ω. 2 Ω 3 Mathematical description of the optimization problem, as design variables are designed to design a line of domain Ω 1 The dielectric constant in any mesh, the optimization target is divided into two parts, F 1 For electric field points, used to reduce optimization target area Ω 2 Ω 3 Internal electric field model. C ref1 And C ref2 F 1 The normalization parameters of the medium two optimization components make the value obtained in the initial calculation process, thereby increasing the convergence speed of the algorithm. fly 2 For gradient penalties, it is used to prevent numerical...

Embodiment 2

[0089] Example 2: 110kV Basin Support Insulator

[0090] 1) Optimization of dielectric parameters of the insulator flange side

[0091] 110kV disk support insulator to optimize the dielectric constant, support the root of the insulator 1 The area is a domain-based domain, and the arrow is an optimized target area Ω. 2 Ω 3 Mathematical description of the optimization problem is as designable to design a line of domain Ω 1 The dielectric constant in any mesh, the optimization target is divided into two parts, F 1 For electric field points, used to reduce optimization target area Ω 2 Ω 3 Internal electric field model. C ref1 And C ref2 F 1 The normalization parameters of the medium two optimization components make the value obtained in the initial calculation process, thereby increasing the convergence speed of the algorithm. fly 2 For gradient penalties, it is used to prevent numerical instability of "chessboard", improve the optimization of the manufacture of high dielectric insula...

Embodiment 3

[0102] Example 3: 550kV Basin Support Insulator

[0103] 1) Optimization of dielectric parameters of the insulator flange side

[0104] The two-dimensional axisymmetric structure of the 550kV basin support the insulator such as figure 2 (b) shown, in order to optimize the dielectric constant, support the root of the insulator 1 The area is a domain-based domain, and the arrow is an optimized target area Ω. 2 , Mathematical description of the optimization problem is 5, design variables are designed to be domain Ω 1 The dielectric constant in any mesh, the optimization target is divided into two parts, F 1 For electric field points, used to reduce optimization target area Ω 2 Ω 3 Internal electric field model. C ref Forth 1 The normalization parameters of the medium two optimization components make the value obtained in the initial calculation process, thereby increasing the convergence speed of the algorithm. fly 2 For gradient penalties, it is used to prevent numerical instability...

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Abstract

The invention discloses a suppression method for partial discharge at a flange of a GIS / GIL supporting insulator. According to the invention, reduction of electric field intensity in a flange-side local air gap area is taken as an optimization target, and optimal space distribution of flange-side insulation internal dielectric parameters of supporting insulator is solved by using a variable density or level set algorithm; and extracting the geometric contour of a high-dielectric region by using an image segmentation algorithm, and acquiring a CAD drawing of the geometric shape of the high-dielectric region through a parameter modeling mode. According to the invention, dielectric functional gradient material distribution is introduced in consideration of the mechanical properties and interface bonding strength of a cast workpiece, the structural design of a high-dielectric area workpiece is improved; a high-dielectric composite material is prepared in a high-dielectric filler / polymer blending mode, and manufacturing of the workpiece is completed through 3D printing; and finally, the high-dielectric workpiece is put into a traditional epoxy pouring metal mold, and thermocuring epoxy resin is poured to complete manufacturing of the supporting insulator.

Description

Technical field [0001] The present invention belongs to the technical field of high voltage power equipment design and manufacturing, and more particularly to a partial discharge suppression method of GIS / GIL support insulator flange. Background technique [0002] Gas Insulated Switchgear (GIS) is widely used in ultra-high-voltage substation due to its advantages such as small area, operating environment stability. As a new type of advanced transmission, GAS INSULATEDTRANSMISSION LINE (GIL) has the advantages of large delivery capacity, small transport loss, high security, and is often used as an alternative to overhead lines. It is used in a special transmission environment. . [0003] In the production and installation phase of GIS / GIL equipment, metal particles can inevitably introduce metal particles inside the pipe, which will gather in GIS / GIL to support the insulator near the flange under GIS / GIL under the action of gravity, electric field force, and Lorenz. Among ...

Claims

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Application Information

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IPC IPC(8): H01B19/00B29C64/386B29C39/10B29C69/02B33Y50/00G06T7/181G06T7/11
CPCH01B19/00B29C64/386B29C39/10B29C69/02B33Y50/00G06T7/181G06T7/11G06T2207/10004Y02E60/00
Inventor 张冠军王超李文栋尹昊阳杨雄张宇程
Owner XI AN JIAOTONG UNIV
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