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Built-in ultrahigh-frequency antenna sensor for switch cabinet

A switch cabinet and ultra-high frequency technology, applied in the structural field of partial discharge ultra-high frequency antenna sensors

Inactive Publication Date: 2012-10-10
CHONGQING CITY SHIZHU COUNTY POWER SUPPLY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the antenna sensor are: ①The peripheral structure of the antenna sensor is designed for installation on the outside of the GIS pot insulator, the structure is relatively complex, the volume is large, and it is not suitable for installation inside electrical equipment; ②The antenna sensor is an external sensor , due to the shielding effect of electromagnetic waves and the small gain of the antenna sensor itself, the sensitivity of the antenna sensor is low, and it cannot capture the weak partial discharge signal inside the electrical equipment

Method used

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  • Built-in ultrahigh-frequency antenna sensor for switch cabinet
  • Built-in ultrahigh-frequency antenna sensor for switch cabinet
  • Built-in ultrahigh-frequency antenna sensor for switch cabinet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 , 2 As shown, a switchgear built-in UHF antenna sensor, including antenna radiation layer 1, feeding probe 6, dielectric layer 2, support plate 5, air dielectric layer 3, coaxial cable 7, coaxial connector 8, grounding Layer 4.

[0031]The material of the dielectric layer 2 is epoxy resin with a relative permittivity of 4.8. The shape of the dielectric layer is a square with a side length of 200 mm and a thickness of 5 mm, and is used as an insulating layer and a supporting member of the antenna sensor of the present invention. On the periphery of the dielectric layer 2 , two screw holes are uniformly arranged respectively for fixing the support plate 5 . Four support plates 5 are respectively fixed on the lower end surfaces around the dielectric layer 2 by bolts. Each support plate 5 has a thickness of 3 mm, a height of 20 mm, and a length equal to the side length of the dielectric layer 2 . The support plate 5 , the dielectric layer 2 and the gr...

Embodiment 2

[0036] A built-in UHF antenna sensor in a switchgear is the same as in Embodiment 1, wherein the material of the dielectric layer 2 is epoxy resin with a relative permittivity of 2.5. Its side length is 100 mm and its thickness is 1 mm. There are four screw holes on the dielectric layer 2 for fixing the support plate 5 . The support plate 5 has a thickness of 2 mm and a height of 5 mm. The antenna radiating layer 1 is made of aluminum, with a peripheral side length of 98 mm and a thickness of 5 μm. The surface is plated with a tin layer with a thickness of 3 μm. The aperture of the feed point 10 is 0.2 mm. The material of the feed probe 6 is aluminum, and the length is 4 mm. The material 4 of the ground layer is aluminum with a side length of 120 mm and a thickness of 1 mm. The number of screw holes on the ground layer 4 for fixing the support plate 5 is 4, and the ground layer 4 is used for fixing the antenna sensor to the switch cabinet. The number of screw holes on the ...

Embodiment 3

[0038] A built-in UHF antenna sensor in a switchgear is the same as in Embodiment 1, wherein the material of the dielectric layer 2 is epoxy resin with a relative dielectric constant of 10.2. It has a side length of 250 mm and a thickness of 3 mm. There are 8 screw holes on the dielectric layer 2 for fixing the support plate 5 . The supporting plate 5 has a thickness of 10 mm and a height of 15 mm. The material of the antenna radiation layer 1 is silver, the outer side length is 240mm, and the thickness is 50μm. The surface is plated with a tin layer with a thickness of 12 μm. The aperture of the feed point 10 is 2 mm. The material of the feed probe 6 is silver, and the length is 14 mm. The material 4 of the ground layer is silver, with a side length of 270 mm and a thickness of 5 mm. The number of screw holes on the ground layer 4 for fixing the support plate 5 is 8, and the ground layer 4 is used for fixing the antenna sensor to the switch cabinet. The number of screw ho...

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Abstract

The invention discloses a built-in ultrahigh-frequency antenna sensor for a switch cabinet, and belongs to the technical field of online monitoring of the insulating state of electric equipment. The built-in ultrahigh-frequency antenna sensor mainly comprises an antenna radiation layer, a feed probe, a dielectric medium layer, an air medium layer, a ground layer, a coaxial cable and a coaxial joint. The built-in ultrahigh-frequency antenna sensor is attached to a bottom plate or a side plate in the switch cabinet, has the characteristics of convenience for installing, high directionality, high anti-interference capability, wide frequency band, high gain, high sensitivity and the like, and can be used for effectively monitoring a local discharge ultrahigh frequency signal in the switch cabinet on line in real time, eliminating fault and hidden dangers in time, and ensuring safe running of the switch cabinet. The built-in ultrahigh-frequency antenna sensor can be widely applied to local discharge ultrahigh-frequency online monitoring of switch cabinets for power plants and converting stations.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring of the insulation state of electrical equipment, and in particular relates to the structure of a partial discharge ultra-high frequency antenna sensor for monitoring a switch cabinet. Background technique [0002] In recent years, with the continuous improvement of the voltage level of the power system and the continuous expansion of the grid scale, ensuring the insulation safety of electrical equipment has become an important prerequisite for ensuring the safe operation of the system. Switchgear is widely used in power systems and directly supplies power to distribution networks and users. Because it is directly related to the power supply, the economic loss and social loss caused by the power outage caused by the failure of the switchgear are very large, and the importance of its equipment safety is beyond doubt. And because the internal space of the switchgear is small, there are ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 周泽宏姚陈果黄琮鉴刘乾坤李成祥陈昱米彦
Owner CHONGQING CITY SHIZHU COUNTY POWER SUPPLY
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