CN219513320U - Capacitive ultra-high frequency partial discharge antenna - Google Patents
Capacitive ultra-high frequency partial discharge antenna Download PDFInfo
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- CN219513320U CN219513320U CN202223415330.6U CN202223415330U CN219513320U CN 219513320 U CN219513320 U CN 219513320U CN 202223415330 U CN202223415330 U CN 202223415330U CN 219513320 U CN219513320 U CN 219513320U
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- aerial plug
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- protective cover
- partial discharge
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Abstract
The utility model discloses a capacitive ultra-high frequency partial discharge antenna, which comprises an aerial plug protective cover, an N-type 90-degree feeder aerial plug, a 260 antenna base, a polytetrafluoroethylene plate and an antenna cover, wherein the aerial plug protective cover is arranged on the aerial plug protective cover; the aerial plug protective cover is arranged below the 260 antenna base, and the N-type 90-degree feeder line is aerial plug arranged in the aerial plug protective cover; the N-type 90-degree feeder aerial plug is arranged in the aerial plug protective cover through the corrugated pipe tightening nut component; the polytetrafluoroethylene board is installed below 260 antenna base, and the antenna cover is fixed in polytetrafluoroethylene board top. The utility model can be operated in GIS for a long time, is maintenance-free, and reduces the maintenance work of on-site operation and maintenance personnel.
Description
Technical Field
The utility model relates to an ultrahigh frequency partial discharge antenna, in particular to a capacitive ultrahigh frequency partial discharge antenna.
Background
The enclosed gas insulated combined electrical apparatus (GIS) is to combine the electrical components such as a breaker, an isolating switch, a quick grounding switch, a voltage transformer, a current transformer and the like in a metal shell in a closed way, uses SF6 artificial inert gas with high electric strength and good characteristics as an insulating medium, replaces the prior power substation to connect various electrical equipment by a bare wire and uses air as an insulating switch station, and is widely applied to high-voltage power transmission and distribution systems such as urban power supply and distribution, power plants, petrochemical industry, metallurgy and the like.
GIS has the characteristics of small occupied area, safe and reliable operation, excellent electromagnetic compatibility and the like. But simultaneously has the new problems of high manufacturing quality requirement, complicated maintenance process and serious fault consequences. Wherein insulation accidents are the main cause of GIS faults. The partial discharge detection is a hard index for detecting the cleanliness inside the GIS by a manufacturing plant, can make up for the defect of a withstand voltage test, effectively find insulation defects and errors in the GIS manufacturing and assembling process, can determine the fault position, further effectively process and ensure the safe operation of equipment. Meanwhile, the partial discharge detection can meet the live monitoring in the actual running process of the site, and is the most effective method for GIS insulation detection and diagnosis.
The partial discharge detection method comprises an electrical measurement method and an electroless measurement method, wherein the electrical measurement method mainly uses an ultrasonic monitoring method and an ultrahigh frequency method. The ultrasonic method has a complex structure, requires operation of experienced professionals, requires a plurality of sensors to perform fault location, can only monitor discharge sources of free moving particles and suspended matters, and has high sensitivity, can be used in equipment operation, has high monitoring precision and is suitable for discharge sources of various defect types. Devices using partial discharge ultra high frequency detection methods generally include Ultra High Frequency (UHF) antennas, filters, low noise amplifiers, envelope detection, data acquisition, data analysis, data presentation, and the like. The ultrahigh frequency antenna is a signal input source of the partial discharge equipment, and the performance of the ultrahigh frequency antenna determines the precision, sensitivity and accuracy of the whole system.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a capacitive ultrahigh frequency partial discharge antenna which is used for receiving local ultrahigh frequency discharge signals in GIS equipment and improving the precision, sensitivity and accuracy of the whole system.
The capacitive ultrahigh frequency partial discharge antenna is realized by the following technical scheme: the antenna comprises an aerial plug protective cover, an N-type 90-degree feeder aerial plug, an antenna base, a polytetrafluoroethylene plate and an antenna cover;
the aerial plug protective cover is arranged below the antenna base, and the N-type 90-degree feeder line aerial plug is arranged in the aerial plug protective cover; the N-type 90-degree feeder aerial plug is arranged in the aerial plug protective cover through the corrugated pipe tightening nut component; the polytetrafluoroethylene board is installed below the antenna base, and the antenna cover is fixed above the polytetrafluoroethylene board.
As the preferable technical scheme, sealing O-ring assemblies are arranged between the antenna base and the polytetrafluoroethylene plate and between the antenna cover and the polytetrafluoroethylene plate.
As a preferable technical scheme, the antenna cover comprises an antenna middle cover and an antenna upper cover, and the antenna upper cover is fixed below the antenna middle cover.
The beneficial effects of the utility model are as follows: the antenna adopts a pure structural member, forms a natural capacitor cavity by utilizing the pure structure, has no electric element, can run in a GIS for a long time, is maintenance-free, and reduces the maintenance work of on-site operation and maintenance personnel.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an exploded view of the present utility model;
FIG. 3 is a schematic diagram of a capacitive voltage division model according to the present utility model.
Detailed Description
All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
As shown in fig. 1-2, the capacitive ultra-high frequency partial discharge antenna comprises an aerial plug protective cover 1, an N-type 90-degree feeder aerial plug 3, an antenna base 4, a polytetrafluoroethylene plate 6 and an antenna cover;
the aerial plug protection cover 1 is arranged below the antenna base 4, and the N-type 90-degree feeder aerial plug 3 is arranged in the aerial plug protection cover 1; the N-type 90-degree feeder aerial plug 3 is arranged in the aerial plug protective cover 1 through the corrugated pipe tightening nut component 2; the polytetrafluoroethylene plate 6 is installed below the antenna base 4, and the antenna cover is fixed above the polytetrafluoroethylene plate 6.
In this embodiment, a sealing O-ring assembly 5 is disposed between the antenna base 4 and the polytetrafluoroethylene plate 6, and between the antenna cover and the polytetrafluoroethylene plate 6.
In this embodiment, the antenna cover includes an antenna middle cover 7 and an antenna upper cover 8, and the antenna upper cover 8 is fixed below the antenna middle cover 7.
The specific dimensions of the antenna base, the aviation plug protective cover, the antenna upper cover, the antenna middle cover and the polytetrafluoroethylene plate are subjected to simulation design according to the center frequency and the bandwidth of the antenna.
As shown in fig. 3, the partial discharge antenna analysis uses a capacitive partial pressure model, when partial discharge of the GIS device occurs, electromagnetic waves repeatedly propagate, reflect, refract, delay, attenuate and the like through the internal space and structure of the GIS, radiate to the outside through an insulator, are received by the internal partial discharge antenna in a capacitive coupling mode, and are conducted to a detection unit such as a filter for sampling and processing; according to the design principle, the special-shaped small broadband built-in antenna is formed by changing the area of the monopole of the antenna; because the airtight metal layer can shield electromagnetic signals, when an external ultrahigh frequency sensor is additionally arranged, a polytetrafluoroethylene plate basin-type insulator without a metal flange ring is required to be selected; the bolt fixing mode is suitable for the metal flange basin with the pouring holes, screw holes are formed in four corners of the pouring holes, and the sealing plate is fixed by bolts; the bolt fixing and installing mode needs to design and manufacture a fixed plate, screw holes matched with the sealing cover plate of the pouring hole of the metal flange basin are drilled in the fixed plate, the cover plate is disassembled, the fixed plate is fastened by bolts, and the ultrahigh frequency sensor is installed on the basis of the fixed plate.
The foregoing is merely illustrative of specific embodiments of the present utility model, and the scope of the utility model is not limited thereto, but any changes or substitutions that do not undergo the inventive effort should be construed as falling within the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope defined by the claims.
Claims (3)
1. A capacitive ultra-high frequency partial discharge antenna is characterized in that: the antenna comprises an aerial plug protective cover (1), an N-type 90-degree feeder aerial plug (3), an antenna base (4), a polytetrafluoroethylene plate (6) and an antenna cover;
the aerial plug protection cover (1) is arranged below the antenna base (4), and the N-type 90-degree feeder aerial plug (3) is arranged in the aerial plug protection cover (1); the N-type 90-degree feeder aerial plug (3) is arranged in the aerial plug protective cover (1) through the corrugated pipe tightening nut component (2); the polytetrafluoroethylene plate (6) is arranged below the antenna base (4), and the antenna cover is fixed above the polytetrafluoroethylene plate (6).
2. The capacitive ultra-high frequency partial discharge antenna of claim 1, wherein: and sealing O-ring assemblies (5) are arranged between the antenna base (4) and the polytetrafluoroethylene plate (6) and between the antenna cover and the polytetrafluoroethylene plate (6).
3. The capacitive ultra-high frequency partial discharge antenna of claim 1, wherein: the antenna cover comprises an antenna middle cover (7) and an antenna upper cover (8), and the antenna upper cover (8) is fixed below the antenna middle cover (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223415330.6U CN219513320U (en) | 2022-12-20 | 2022-12-20 | Capacitive ultra-high frequency partial discharge antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223415330.6U CN219513320U (en) | 2022-12-20 | 2022-12-20 | Capacitive ultra-high frequency partial discharge antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219513320U true CN219513320U (en) | 2023-08-11 |
Family
ID=87549297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223415330.6U Active CN219513320U (en) | 2022-12-20 | 2022-12-20 | Capacitive ultra-high frequency partial discharge antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219513320U (en) |
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2022
- 2022-12-20 CN CN202223415330.6U patent/CN219513320U/en active Active
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