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A Pure Air Series Gap Type AC UHV Line Surge Arrester

A line lightning arrester and series gap technology, which is applied in the field of lightning arresters, can solve the problems of difficult installation, mismatching installation space, difficult test and design, etc., and achieve the effect of large gap adjustment range, simple structure and good application prospects

Active Publication Date: 2016-08-03
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are actual operating surge arresters of 500kV and below at home and abroad. The sum of the distance between the arrester body and the gap is generally greater than the length of the insulator connected in parallel with it. Special fittings need to be designed to solve the problem of mismatching installation space, and the installation is difficult.
Due to the increase of the voltage level, the height and weight of the UHV line arrester body will inevitably be greater than that of the 500kV and below line arrester, and the installation will be more difficult; currently there is no test data on the air gap and insulation coordination of the UHV line arrester. and difficult to design

Method used

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  • A Pure Air Series Gap Type AC UHV Line Surge Arrester
  • A Pure Air Series Gap Type AC UHV Line Surge Arrester
  • A Pure Air Series Gap Type AC UHV Line Surge Arrester

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] like Figure 1-Figure 3 , a pure air series gap type AC UHV line arrester, the arrester includes an arrester body and a series gap group, the arrester body includes a jacket, a resistance sheet and a series-connected arrester element, and the series gap group includes successively series Gap, the series gap group is connected to the high voltage end of the arrester body; the height of the arrester body is 4-6m, and the height of 4.6m is optimal.

[0023] The distance between the gaps is 2.0-2.4m, preferably 2.1-2.3m.

[0024] The creepage distance of the arrester body is not less than 10200mm.

[0025] The dry-arcing distance of the jacket is not less than 4.6m, so that the arrester body can withstand a lightning impulse voltage not lower than 1.25 times its actual protection level, and can withstand not less than 635kV power frequency voltage for 1...

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Abstract

The invention provides a pure-air serial gap type extra-high voltage line lightening arrester. The lightening arrester comprises a lightening arrester body and a serial gap group, wherein the lightening arrester body comprises an outer sleeve, a resistor disc and lightening arrester components connected in series, the serial gap group comprises gaps connected in series sequentially, and the serial gap group is connected with a high voltage end of the lightening arrester body; and the lightening arrester body is 4-6m in height, and distance between the gaps is 2.0-2.4m. The pure-air serial gap type extra-high voltage line lightening arrester has the advantages that the structure is simple, the volume is small, and the installation are convenient, the gap adjusting range is large, the technical parameters are reasonable, and the application prospect is good.

Description

technical field [0001] The invention relates to a lightning arrester, in particular to a pure air series gap type AC ultra-high voltage line lightning arrester. Background technique [0002] Engineering usually uses methods such as reducing grounding resistance, erecting double lightning conductors, and reducing the protection angle of lightning conductors to limit lightning overvoltage and reduce lightning tripping rates. However, in the mountainous line section where the lightning activity is strong and it is difficult to reduce the grounding resistance, the above methods cannot fundamentally solve the problem of lightning tripping. [0003] The utility model patent with the application number of 201020537907.9 discloses an ultra-high voltage AC arrester, which includes multi-section arrester elements connected in series, and a voltage equalizing device and an insulating base at the bottom of the arrester element respectively. The connected resistance sheet is connected t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/12H01T4/16
Inventor 苏宁张搏宇张翠霞李光范王宁华王保山宋继军吕雪斌焦飞殷禹沈海滨张晓星
Owner CHINA ELECTRIC POWER RES INST