Built-in ultrahigh frequency sensor spread spectrum structure for GIS partial discharge detection

A technology of ultra-high frequency sensor and partial discharge detection, which is applied in the direction of measuring devices, instruments, measuring electricity, etc., to achieve the effect of extending the size of electricity and expanding the effect significantly

Active Publication Date: 2016-05-04
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

How to reduce the lower limit of low frequency, broaden the bandwidth of

Method used

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  • Built-in ultrahigh frequency sensor spread spectrum structure for GIS partial discharge detection
  • Built-in ultrahigh frequency sensor spread spectrum structure for GIS partial discharge detection
  • Built-in ultrahigh frequency sensor spread spectrum structure for GIS partial discharge detection

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Embodiment Construction

[0037] In order to make the object, technical scheme and advantages of the present invention clearer, the following in conjunction with the attached Figure 1-4 and specific examples to clearly and completely describe the invention.

[0038] Such as Figure 1~Figure 3As shown, this embodiment includes a metal cover plate 14 fastened on the GIS equipment cavity 20, an antenna body 1 fixed inside the metal cover plate 14 by metal bolts 6, and an antenna body 1 fixed on the lower surface of the antenna body 1 Impedance converter 2; electrically connect the two antenna conductive arms of the antenna body 1 to the metal bolt 6 next to it through the wire 23 respectively.

[0039] The structure of the built-in ultra-high frequency sensor to expand the lower limit of bandwidth and low frequency includes connecting the two antenna conductive arms of the planar equiangular helical antenna with the adjacent metal bolts 6 by wires, thereby extending the electrical size of the antenna co...

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Abstract

The invention discloses a built-in ultrahigh frequency sensor spread spectrum structure for GIS partial discharge detection, and belongs to the field of sensor frequency band bandwidth adjustment. The structure comprises a metal cover plate buckling on a GIS cavity and a built-in ultrahigh frequency sensor fixed at the inner side of the metal cover plate through height adjustable metal bolts, wherein the built-in ultrahigh frequency sensor comprises an antenna body and an impedance converter connected therewith; one end of the metal bolt is fixed in a non-conductive area of the antenna body, and the other end is connected with the metal cover plate; the metal cover plate and the GIS cavity are in conductive contact; and antenna conductive arms of the antenna body are respectively electrically connected with adjacent metal bolt. The structure provided by the invention has the advantage of effectively solving the problem of low-frequency lower-limit extension of the built-in ultrahigh frequency sensor under the condition that the dimensions of the antenna body and the impedance converter are not increased in a limited GIS internal space under GIS onsite complex conditions.

Description

technical field [0001] The invention belongs to the field of sensor frequency band bandwidth adjustment, in particular to a built-in ultra-high frequency sensor spread spectrum structure for GIS partial discharge detection. Background technique [0002] With many advantages such as less maintenance workload, compact structure, and convenient installation, GIS has gradually become the mainstream equipment in the construction of UHV power system projects in recent years, and its operation reliability has attracted more and more attention. [0003] Due to various factors such as manufacturing, transportation, on-site assembly, operation and maintenance, GIS inevitably has some insulation defects that threaten the insulation performance. These defects often produce partial discharges in the early stage. If partial discharge exists for a long time, the electrical insulation performance of GIS will be reduced, which will eventually lead to insulation failure. The use of appropr...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/129
Inventor 李天辉潘瑾关巍刘宏亮李晓峰庞先海顾朝敏
Owner STATE GRID CORP OF CHINA
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