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On-line monitoring antennae

A monitoring antenna, a pair of technology, applied in the field of detection sensors, can solve the problems of high impedance matching requirements, complex antenna structure, few variable design parameters, etc., and achieve the effect of compact structure

Active Publication Date: 2014-01-29
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the antennas used in the field of transformer on-line monitoring mainly include planar equiangular helical antennas and Archimedes antennas. Performance is greatly affected by size

Method used

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Embodiment Construction

[0018] In order to facilitate a further understanding of the structure and achieved effects of the present invention, preferred embodiments are described in detail below in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, the online monitoring antenna of the present invention includes: two pairs (four) of fan-shaped metal sheets 1, four cylindrical conductors 2 respectively connected to the bottom of fan-shaped metal sheets 1, and strip-shaped metal strips connected to the bottom ends of two opposite cylindrical conductors 2. Sheet 3, the center of the strip-shaped metal sheet 3 is connected to one end of a thin metal cylinder, and the other end of the thin metal cylinder is connected to a flange, and a high-frequency N-type connector is fixed on the flange, and the conductor core of the high-frequency N-type connector Welded together with a thin metal cylinder, the base of the high-frequency N-type connector is electrically connected to the flan...

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Abstract

The invention discloses an on-line monitoring antenna comprising two pairs of fan-shaped sheetmetals, four cylindrical conductors and strip-typed sheetmetals. The cylindrical conductors are respectively connected on the bottom of the fan-shaped sheetmetals and the strip-typed sheetmetals are connected with two opposite bottoms of the cylindrical conductors. One end of a thin metal cylinder is connected with the center of the strip-typed sheetmetals, the other end of the thin metal cylinder is connected with a flange, a high-frequency N shaped connector is fixed on the flange, a conductor core of the high-frequency N shaped connector is welded with the thin metal cylinder, a base of the high-frequency N shaped connector is electrically connected with the flange and is grounded, the periphery of the metal cylinder is coated with a Teflon insulating sleeve, four fan-shaped sheetmetals are in the same plane and form a metal round disk, and a fine metal lead is winded around the metal round disk and is welded with the cylindrical conductors. The on-line monitoring antenna is good in actual measuring performance, wide in bandwidth, high in sensitivity, small and exquisite in structure and convenient to process.

Description

technical field [0001] The invention relates to a detection sensor in the technical field of electric power engineering, in particular to an antenna for UHF online monitoring of partial discharge inside a high-voltage power transformer. Background technique [0002] The power transformer is an important part of the power grid and the core equipment for power conversion and transmission in the power grid. Therefore, the normal operation of the transformer is of great significance to the safety of the power grid. The early stage of transformer failure is usually accompanied by partial discharge. Since the duration of partial discharge is usually less than 1ns, the emitted electromagnetic wave spectrum is very wide, including ultra-high frequency signals (frequency in the range of 0.3GHz~3GHz). Based on this phenomenon, UHF antennas can be used to monitor PD UHF signals, so as to realize real-time monitoring of PD phenomena. Due to the high signal-to-noise ratio of the UHF me...

Claims

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Application Information

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IPC IPC(8): H01Q1/36G01R31/12
Inventor 刘宏亮潘瑾高骏岳国良范辉高树国赵军杜大全
Owner STATE GRID CORP OF CHINA
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