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
CN105548841AActive Publication Date: 2016-05-04STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2016-05-04

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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.
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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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