Coaxial cylindrical SF6 breakdown voltage experimental device

A technology of breakdown voltage and experimental device, applied in the direction of measurement device, measurement of electricity, measurement of electrical variables, etc., can solve the problems of lack of systematic, in-depth research, rare in insulation characteristics, etc.

Inactive Publication Date: 2019-04-30
PINGGAO GRP +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

In terms of GIS insulation properties, at this stage, most of the research on the variation of insulator flashover characteristics with its surface roughness and material types is focused on miniaturization and cylindrical insulating materials. The research on insulation properties is very rare, and there is a lack of systematic and in-depth research

Method used

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  • Coaxial cylindrical SF6 breakdown voltage experimental device
  • Coaxial cylindrical SF6 breakdown voltage experimental device
  • Coaxial cylindrical SF6 breakdown voltage experimental device

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0025] This embodiment provides an implementation manner of the numerical range of the diameter of the inner electrode and the inner wall diameter of the outer electrode, specifically: the diameter range of the inner electrode is 20mm-40mm, and the inner wall diameter range of the outer electrode is 60mm-80mm (these two range verified by simulation).

[0026] Further, as figure 1 As shown, in order to make the electric field of the surrounding environment of the external electrode 103 uniform, a shielding cylinder 104 is arranged on the periphery of the external electrode 103, as Figure 4 As shown, a shielding cylinder 104 is used to protect the overlapping parts of the inner and outer electrodes from the electric field to ensure a uniform electric field around the outer electrode 103. Of course, the shielding cylinder is a metal cylinder. There is no specific relationship between the diameter of the inner wall of the shielding cylinder and the diameter of the outer electrod...

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Abstract

The invention relates to a coaxial cylindrical SF6 breakdown voltage experimental device comprising a sealed case. An inner electrode and an outer electrode are fixedly arranged in the sealed case; the inner electrode is a conductive electrode rod; the outer electrode is a cylindrical conductive sleeve; the inner electrode passes through the outer electrode and is arranged along the axis of the outer electrode; and the outer electrode is grounded. SF6 gas with different gas pressures is led into the sealed case. Under all gas pressures, experiment voltages are applied to the inner electrode and are increased gradually till breakdown; corresponding breakdown voltages under all gas pressures are recorded; and thus a corresponding relationship between the SF6 gas pressure and the breakdown voltages is obtained. Therefore, the experimental device has the high detection precision; and the corresponding relationship between the SF6 gas pressure and the breakdown voltages can be obtained accurately. The important data can be provided for studying the relationship between the gap breakdown voltage and the SF6 pressure in the direct-current electric field in a slightly uneven electric field, so that the corresponding calculation method and criterion are obtained.

Description

technical field [0001] The invention relates to a coaxial cylinder SF 6 A breakdown voltage experimental device belongs to the technical field of DC insulation. Background technique [0002] GIS (gas-insulated metal enclosed switchgear, gas-insulated metal enclosed switchgear) is one of the key equipment in power grid construction, and its metal shell is filled with insulating gas as an arc-extinguishing medium. Generally, the ground insulation and interphase insulation are composed of SF with good arc extinguishing performance and insulation characteristics under a certain pressure. 6 Gas to bear, SF 6 It is an ideal insulating medium and arc extinguishing medium. [0003] Professor C.M.Cooke of the Massachusetts Institute of Technology and S.Menju and K.Takahashi of Japan conducted coaxial cylindrical electrodes in different SFs in the 1970s. 6 The DC breakdown characteristics under gas pressure have been studied. The research shows that when the electric field gradien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R31/16
CPCG01R31/1254G01R31/1281G01R31/16
Inventor 王亚祥林生军田浩袁端鹏韩丽娟苗晓军罗军乔会杰张红恩李宝增黄青松徐仲勋
Owner PINGGAO GRP
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