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Ultrahigh-frequency broadband microstrip antenna for partial discharge monitoring of switchgear

A technology for partial discharge monitoring and microstrip antennas, applied to antennas, devices and circuits that enable antennas to work in different bands at the same time, can solve the problems of ultra-high frequency antenna monitoring frequency band narrow gain, etc., to achieve strong anti-interference ability, high frequency Good bandwidth and directivity

Inactive Publication Date: 2015-08-26
STATE GRID EAST INNER MONGOLIA ELECTRIC POWER CO LTD MAINTENANCE BRANCH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide an ultra-high frequency broadband antenna for partial discharge monitoring of switch cabinets for the shortcomings of narrow monitoring frequency band and small gain of existing UHF antennas for monitoring partial discharge of switch cabinets. With antenna sensor, it has the characteristics of wide frequency band, small standing wave ratio, large gain, good directivity, high sensitivity, strong anti-interference ability, etc.

Method used

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  • Ultrahigh-frequency broadband microstrip antenna for partial discharge monitoring of switchgear
  • Ultrahigh-frequency broadband microstrip antenna for partial discharge monitoring of switchgear
  • Ultrahigh-frequency broadband microstrip antenna for partial discharge monitoring of switchgear

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Embodiment 1

[0029] A UHF broadband microstrip antenna for partial discharge monitoring in switchgear:

[0030] FR4 epoxy resin plate with a dielectric constant of 4.4 and a thickness of 2mm is selected as the dielectric substrate of the microstrip antenna. The length of the dielectric substrate is 247mm and the width is 208mm. The width of the microstrip feeder is 109.2 mm in length and 3 mm in width. The length of the radiation patch is 104.25mm, and the width is 110.5mm. The short side of the two right-angled triangles cut off from the top of the rectangular radiation patch is 6.5mm, and the long side is 13mm. mm, the width is 16mm, and the length and width of the rectangle dug out from the middle of the radiation patch are both 52mm. The length of the grounding plate is 105.3mm, and the width is 208mm; the length of the U-shaped groove in the middle part of the top of the grounding plate is 2.5mm, and the width is 1.9mm. The material of the radiation patch, the microstrip feeder and ...

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Abstract

The invention discloses an ultrahigh-frequency broadband microstrip antenna for partial discharge monitoring of a switchgear, and belongs to the field of an electrical equipment insulation state online monitoring technology. The antenna structurally comprises an antenna metal radiation patch, a medium substrate, a metal ground plate, a microstrip feed line and an SMA joint. The antenna provided by the invention has the advantages of wide frequency band, small standing-wave ratio, convenient impedance matching, low manufacturing cost, convenient installation, unaffected normal operation of monitoring equipment, and the like, and can meet the requirement for ultrahigh-frequency online monitoring of partial discharge of a switch gear used for a transformer station.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of the insulation state of electrical equipment, in particular to an ultra-high frequency broadband microstrip antenna structure used for partial discharge monitoring of switch cabinets. Background technique [0002] As a large number of equipment used in the power grid, the switchgear is directly related to the user's power supply, and its operation reliability is directly related to the quality and reliability of the power supply. In the high-voltage power system, the inevitable insulation degradation due to manufacturing process, transportation, assembly and other reasons will produce partial discharge. When the insulation degradation and partial discharge level reach a certain level, it may cause switchgear accidents and cause economic losses to the national economy. huge loss. Therefore, on-line monitoring of the partial discharge of the switchgear is of great significance to ensu...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q5/50
Inventor 罗汉武杨帆程鹏康凯刘海波杨旗
Owner STATE GRID EAST INNER MONGOLIA ELECTRIC POWER CO LTD MAINTENANCE BRANCH
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