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Inflatable extra-high voltage direct current through-the-wall bushing

A technology of UHV DC and wall-piercing bushings, which is applied in the direction of electrical components, insulators, insulators, etc., and can solve problems such as bushing insulation degradation, accelerated insulator aging, and insulation breakdown, achieving reliable performance, preventing damage, and improving reliability effect

Active Publication Date: 2016-09-28
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The capacitor core insulated in the capacitive bushing will produce partial discharge due to the influence of manufacturing quality, which will induce the deterioration of the internal insulation of the bushing, and then the insulation breakdown failure will occur
At the same time, the installation of insulators inside the inflatable bushing will cause space charge adsorption, which will lead to accelerated aging of the insulator, resulting in insulation breakdown failure, which reduces the reliability of the high-voltage wall-piercing bushing.
[0004] In order to solve the uncontrollable risk of DC transmission caused by the existing DC wall bushing due to its manufacturing and its own reasons, it is necessary to conduct in-depth research on the existing DC wall bushing, and carry out major structural improvements and optimizations if necessary. Therefore The development of a new type of purely inflatable DC wall bushing without any insulator can better solve the shortcomings and defects of the existing DC wall bushing and improve the reliability of DC power transmission

Method used

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  • Inflatable extra-high voltage direct current through-the-wall bushing
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  • Inflatable extra-high voltage direct current through-the-wall bushing

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Embodiment Construction

[0024] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

[0025] see Figures 1 to 4 As shown, an inflatable UHV DC wall bushing of the present invention is composed of an indoor side and an outdoor side, including a shielding cover 1 for external pressure equalization, an indoor hollow composite insulator 2, and a middle part for connecting the middle part Connecting cylinder 3, outdoor ...

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PUM

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Abstract

The invention discloses an inflatable extra-high voltage direct current through-the-wall bushing comprising an insulation sleeve and a central conductor penetrating the insulation sleeve. One end of the central conductor is fixedly connected with an outdoor side sleeve pipe end cover on one side of the insulation sleeve, and the other end is connected with a T-shaped bellows end cover on the other side of the insulation sleeve in a sealed manner. A stretching device is disposed between the bellows end cover and the central conductor, which are cooperated with each to perform the single-side stretching on the central conductor. The inflatable extra-high voltage direct current through-the-wall bushing has advantages of simple structure, strong discharge capability, reliable performance, and ability of facilitating safe and stable operation of direct current power transmission system.

Description

【Technical field】 [0001] The invention belongs to the technical field of electrical engineering, in particular to an inflatable UHV DC wall bushing. 【Background technique】 [0002] Due to its advantages, high-voltage direct current transmission technology has many advantages such as small line loss, low line cost, reliable operation, strong system stability, suitable for long-distance large-capacity power transmission, and relatively easy to realize interconnection between asynchronous power grids. And more and more favored by the power industry, especially in the aspects of long-distance grid connection, cross-sea power transmission and large-capacity power transmission, the superiority of HVDC transmission is becoming more and more obvious. As an important high-end electrical equipment of the DC transmission system, the UHV DC wall bushing plays an important role in the economical transmission, flexible distribution and safe use of electric energy. [0003] At present, DC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G3/22H01B17/58H01B17/60
CPCH01B17/583H01B17/60H02G3/22
Inventor 南振乐李振军刘朋飞杨亚锋李新
Owner CHINA XD ELECTRIC CO LTD
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