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Extra-high-voltage DC wall-penetrating sleeve

An ultra-high voltage DC, through-wall bushing technology, applied in insulators, electrical components, insulators and other directions, can solve the problems of uneven external voltage distribution, increased manufacturing difficulty, long production cycle, etc., to improve partial discharge performance, weight change. The effect of light weight and shortened production cycle

Inactive Publication Date: 2016-11-09
JIANGSU ZHIDA ELECTRIC
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

This kind of bushing is heavy, the production cycle is long, and the price is high. Due to the uneven distribution of the external voltage of the DC bushing, bushing manufacturers generally increase the distance of the external insulation dry arc to solve the problem, which not only increases the cost of the product, but also increases the cost of the product. manufacturing difficulty

Method used

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  • Extra-high-voltage DC wall-penetrating sleeve

Examples

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with examples. However, the invention is not limited to the examples given.

[0021] like figure 1 As shown, the UHV DC wall bushing of this embodiment includes: insulating parts fixed on both sides of the grounding cylinder, high-voltage electrodes penetrating through the insulating part, and grounding electrodes fixed on the inner wall of the grounding cylinder. The grounding cylinder is equipped with end-screen measuring terminals, current transformers and flange structures for installation on the wall. The casing ensures the sealing of the end of the casing through the spring structure 7 and the seal, and the casing is filled with SF6 insulating gas 10 . The outer end of the insulating part is provided with an end plate. Take the upper insulation part in the figure as an example (the insulation structure on both sides of the grounding cylinder is the same), the insulation part has two ...

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Abstract

The invention relates to an extra-high-voltage DC wall-penetrating sleeve which comprises an insulating portion fixed on two sides of a grounding cylinder, a high voltage electrode penetrating the insulating portion, and a grounding electrode fixed on the inner wall of the grounding cylinder, wherein the insulating portion at least comprises two adjacent sub-sleeves, which are fixed into one body through a transition plate. An intermediate electrode between the grounding electrode and the high voltage electrode is arranged in the wall-penetrating sleeve, and the two ends of the intermediate electrode are fixed respectively through two transition plates. Compared with a conventional DC wall-penetrating sleeve, the extra-high-voltage DC wall-penetrating sleeve has the advantages of short production period, light weight, low manufacture cost, high bending strength, safe and reliable operation and substantially improved electrical performance.

Description

technical field [0001] The invention relates to a UHV bushing, in particular to a UHV DC wall bushing with a new structure. Background technique [0002] With the development of the national economy and the sharp increase in residential and industrial electricity consumption, the voltage level of transmission lines is developing towards ultra-high voltage and ultra-high voltage. China has begun to build ultra-high voltage 1100kV AC transmission lines and ±800kV DC transmission lines, and plans to build ±1100kV DC transmission line, so the UHV DC bushing matched with the transmission line has a broad market prospect. [0003] At present, the DC wall bushing at home and abroad adopts the glue-impregnated paper capacitive type, which is generally composed of two glue-impregnated paper capacitive bushings connected, and the lower insulation is filled with SF6 gas insulation. This kind of bushing is heavy, the production cycle is long, and the price is high. Due to the uneven di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G3/22H01B17/58H01R4/66
CPCH01B17/583H01R4/66H02G3/22
Inventor 虞育号
Owner JIANGSU ZHIDA ELECTRIC
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