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EHV/UHV gas-insulated wall-piercing bushing center current-carrying conductor brace structure and EHV/UHV gas-insulated wall-piercing bushing

A gas-insulated, wall-penetrating bushing technology, applied in pull-in/through-type insulators, insulators, insulators, etc., can solve problems such as bushing discharge and DC system failure to operate normally, to avoid surface flashover accidents and improve operation. Safety and reliability, the effect of solving safety hazards

Active Publication Date: 2020-06-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under long-term operating conditions, the introduced internal support insulator will cause flashover due to its surface charge accumulation and surface particle adsorption, resulting in bushing discharge and DC system failure

Method used

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  • EHV/UHV gas-insulated wall-piercing bushing center current-carrying conductor brace structure and EHV/UHV gas-insulated wall-piercing bushing
  • EHV/UHV gas-insulated wall-piercing bushing center current-carrying conductor brace structure and EHV/UHV gas-insulated wall-piercing bushing
  • EHV/UHV gas-insulated wall-piercing bushing center current-carrying conductor brace structure and EHV/UHV gas-insulated wall-piercing bushing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as image 3 , the central current-carrying conductor brace structure of the EHV gas-insulated wall-piercing bushing of the present invention also includes a rod-type suspension composite insulator for keeping the hollow composite insulator 3 of the EHV gas-insulated wall-piercing bushing horizontal 1. Rod-type suspension composite insulators 1 are connected to both ends of the EHV / UHV gas-insulated wall bushing. After the EH / UHV gas-insulated wall bushing is installed, the lower end of the rod-type suspension composite insulator 1 is connected to the end flange 7, and the upper end is connected to the wall through which the EH / UHV gas-insulated wall bushing passes. Or the top of the valve hall is fixedly connected, and the connection type is single I type, double I type or V type connection. The rod type suspension composite insulator 1 pulls up the two ends of the wall bushing to reduce the deflection of the hollow composite insulator 3 outside the wall bushing d...

Embodiment 2

[0042] Such as Figure 7 As shown, the central current-carrying conductor brace structure of the EHV gas-insulated wall bushing of the present invention also includes a rod-shaped post composite insulator 11 that keeps the hollow composite insulator 3 of the EHV gas-insulated wall bushing horizontal. , Both ends of the EHV / UHV gas-insulated wall bushing are provided with rod-shaped pillar composite insulators 11 . After the EHV / UHV gas-insulated wall bushing is installed, the upper end of the rod-shaped pillar composite insulator 11 is fixed to both ends of the wall bushing, and the lower end is fixed to the ground. The support type can be I-shaped or inverted V-shaped, and the rod-shaped pillar Composite insulator 11 is the same as the rod-shaped post composite insulator used in converter stations. It props up the two ends of the wall bushing to reduce the deflection of the external hollow composite insulator 3 due to its own weight and ensure the level of both ends and the m...

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Abstract

The invention discloses an ultra / extra-high voltage gas insulated wall bushing central current-carrying conductor support structure and an ultra / extra-high voltage gas insulated wall bushing. The support structure comprises a cushion block and a support body on which tensioning force is loaded. The support body is disposed in the inner cavity of the central current-carrying conductor of the ultra / extra-high voltage gas insulated wall bushing. Both ends of the support body are fixedly connected with the end portion flanges at both ends of the ultra / extra-high voltage gas insulated wall bushing.The cushion block is disposed in the inner cavity of the central current-carrying conductor and sleeves the support body for supporting the central current-carrying conductor. The upper portion of the cushion block is in contact with the inner surface of the central current-carrying conductor. The structure can reduce the deflection generated by the current-carrying conductor and a hollow composite insulator due to its own weight, solves potential safety hazards caused by a support insulator inside the bushing under a long-term operating condition, and improves the operational reliability ofthe ultra / extra-high voltage gas insulated wall bushing.

Description

technical field [0001] The invention belongs to the field of design and manufacture of ultra / ultra-high voltage transmission equipment, and in particular relates to a central current-carrying conductor brace structure of an ultra / ultra-high voltage gas-insulated wall-piercing bushing and an ultra- / ultra-high voltage gas-insulated wall-piercing bushing. Background technique [0002] EHV / UHV gas insulated wall bushings are generally installed horizontally, which requires high overall mechanical properties of the bushings. In order to reduce the deflection of the central current-carrying conductor inside the bushing and the hollow composite insulator due to its own weight, it is usually necessary to install an insulator supporting the central current-carrying conductor. Under long-term operating conditions, the introduced internal support insulator will cause flashover due to its surface charge accumulation and surface particle adsorption, resulting in bushing discharge and DC ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G3/22H01B17/58
CPCH01B17/586H02G3/22H01B17/26H02B1/54
Inventor 彭宗仁赵晨雨赵福平郭子豪刘鹏
Owner XI AN JIAOTONG UNIV
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