CN206270450U - A kind of partial discharge of switchgear monitoring ultra-high frequency antenna - Google Patents
A kind of partial discharge of switchgear monitoring ultra-high frequency antenna Download PDFInfo
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- CN206270450U CN206270450U CN201621177987.5U CN201621177987U CN206270450U CN 206270450 U CN206270450 U CN 206270450U CN 201621177987 U CN201621177987 U CN 201621177987U CN 206270450 U CN206270450 U CN 206270450U
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Abstract
The utility model is related to monitoring technical field of discharging, there is provided a kind of partial discharge of switchgear monitoring ultra-high frequency antenna, including dielectric layer, aerial radiation layer, ground plane, feed probes, coaxial cable, metal installed part；The utility model antenna is slab construction, only needs to be attached on monitored switch cubicle inner bottom plating or side plate during installation, small volume, will not bring new insulation hidden danger to electrical equipment；It is connected with bottom plate of switch cabinet or side plate using bolt or neodymium-iron-boron permanent magnet, mode is flexible, easy；Aerial radiation layer is 2 rank fractal graphs so that the bending flowing of aerial radiation layer surface induced-current, with lower resonant frequency, significantly reduces the size of antenna；Accuracy in detection is high；Antenna gain high energy receives the faint ultra-high frequency signal of shelf depreciation, there is signal to noise ratio and sensitivity higher, can in time find shelf depreciation present in electrical equipment；Simple and reasonable for structure, market application foreground is wide.
Description
Technical field
The utility model is related to discharge monitoring technical field, more particularly to a kind of partial discharge of switchgear monitoring hyperfrequency
Antenna.
Background technology
Inside switch cabinet narrow space, part are various, complex structure, and insulation distance is small, therefore than other power equipments more
Easily there is insulation defect, such as bubble gap, impurity, spine；Under forceful electric power field action, the Electric Field Distribution of apparatus insulated inside
It is uneven, increase in the electric-field intensity of rejected region, the electric discharge for not running through whole insulation so as to be easily caused the position to occur, i.e.,
Shelf depreciation.Shelf depreciation will not typically cause the penetrability of insulation to puncture, but can but cause the local damage of dielectric.
If its long-term existence, the destruction of seal electrical strength can be under certain condition caused, ultimately cause apparatus insulated puncturing.
For switch cubicle, it is to cause its insulation ag(e)ing or deterioration even to be damaged that its internal electric equipment occurs partial discharge phenomenon
One of bad major reason so as to trigger equipment damage and power system accident, while shelf depreciation is also apparatus insulated integrality
The mark of degeneration.Therefore it is the important of assessment equipment insulation status the shelf depreciation of switch cubicle electrical equipment monitor on-line
Means, are also discovering device Hidden fault, finally realize fault pre-alarming, it is to avoid one of effective measures that failure occurs.
Ultra-high frequency antenna, as the sensor for receiving the electromagnetic wave signal produced by shelf depreciation, is ultrahigh frequency monitoring system
Chief component, its performance quality also directly determine the ultra-high frequency signal later stage extract and identification complexity, and
The ultrahigh frequency antenna sensor of better performances should have bandwidth, standing-wave ratio is small, gain is big, good directionality the characteristics of.
The local discharge superhigh frequency antenna sensor of existing monitoring switch electrical equipment, generally external antenna are sensed
Device, sensor sensitivity is relatively low, it is difficult to capture the faint local discharge signal of inside electric appliance.
Utility model content
The purpose of this utility model is exactly to overcome the deficiencies in the prior art, there is provided a kind of for partial discharge of switchgear prison
Survey ultra-high frequency antenna.
The utility model is a kind of to be used for partial discharge of switchgear monitoring ultra-high frequency antenna, including dielectric layer, antenna spoke
Penetrate layer, ground plane, feed probes, coaxial cable, metal installed part；
The material of the dielectric layer is epoxy resin, is shaped as square；The ground plane is set in parallel in the electricity
Under dielectric layer, size is identical with the dielectric layer, and the dielectric layer corner is separately provided for the hyperfrequency day
Line is installed on the metal installed part of bottom plate of switch cabinet or side plate, and the dielectric layer and the ground plane are installed by the metal
Part is connected；
Aerial radiation layer is laid in the dielectric layer upper surface, and the aerial radiation layer is 2 rank fractal graphs, the
1 rank fractal graph is that first is oval and the first rectangle subtracts each other gained figure, and first rectangle is in described first oval
Spreading is square to reduce 0.5-0.7 times of rear gained；2nd rank fractal graph is that second is oval and the second rectangle subtracts each other gained figure,
Described second is oval for the described first rectangular inner ellipse reduces 0.4-0.6 times of gained, and second rectangle is described
Second oval interior spreading is square to reduce 0.5-0.7 times of rear gained；
Distributing point is provided with the aerial radiation layer, described feed probes one end passes through the distributing point and the antenna
Radiating layer is connected, and the other end is connected with the center copper cash of the coaxial cable being fixed on the ground plane, the coaxial electrical
Cable is lain on the ground plane.
Further, the metal installed part is connected one end and is provided with neodymium iron boron permanent magnetic with bottom plate of switch cabinet or side plate
Iron, the ultra-high frequency antenna is connected by 4 neodymium-iron-boron permanent magnets with bottom plate of switch cabinet or side plate.
Further, the metal installed part is bolted with bottom plate of switch cabinet or side plate.
Further, the material of the dielectric layer is that relative dielectric constant is the epoxy resin of 3-10；The length of side is
100mm-250mm, thickness is 1mm-5mm.
Further, the material of the aerial radiation layer is copper or aluminium or silver that thickness is 5 μm -50 μm, described
The upper surface of aerial radiation layer is coated with the tin layers that thickness is 3 μm~12 μm.
Further, the material of the ground plane is copper coin or aluminium sheet that thickness is 1 mm~5mm.
Further, the working frequency range of the ultra-high frequency antenna is 500MHz-1500MHz.
Further, the passband signal to noise ratio of the ultra-high frequency antenna is less than or equal to 2.5.
Further, the directionality of the ultra-high frequency antenna is not less than 170 degree.
The beneficial effects of the utility model are：Antenna is slab construction, only needs to be attached to bottom in monitored switch cubicle during installation
On plate or side plate, small volume will not bring new insulation hidden danger to electrical equipment；Using bolt or neodymium-iron-boron permanent magnet with
Bottom plate of switch cabinet or side plate are connected, and mode is flexible, easy；Aerial radiation layer is 2 rank fractal graphs so that aerial radiation layer surface
Induced-current bending flowing, with lower resonant frequency, significantly reduces the size of antenna；Antenna frequency band range is
500MHz-1500MHz, due to shelf depreciation electromagnetic wave high fdrequency component（More than 1GHz）Decay in propagation medium violent, mainly
Discharge energy concentrates on low-frequency range, and the utility model can effectively receive the hyperfrequency letter of local discharge of electrical equipment generation
Number, and the degree of accuracy of detection is high；Antenna gain high energy receives the faint ultra-high frequency signal of shelf depreciation, there is signal to noise ratio higher
And sensitivity, can in time find shelf depreciation present in electrical equipment；Simple and reasonable for structure, market application foreground is wide.
Brief description of the drawings
Fig. 1 show the utility model embodiment one kind and shows for partial discharge of switchgear monitoring ultra-high frequency antenna structure
It is intended to.
Fig. 2 show the schematic top plan view of Fig. 1.
Wherein：1- dielectric layers, 2- aerial radiations layer, 3- ground planes, 4- distributing points, 5- metals installed part, 6- feeds are visited
Pin, 7- coaxial cables, 8- neodymium-iron-boron permanent magnets, the rectangles of 11- first, 12- first are oval, 13- second is oval, 14- second
Rectangle.
Specific embodiment
The utility model specific embodiment is described in detail below in conjunction with specific accompanying drawing.It should be noted that following implementations
Example described in technical characteristic or technical characteristic combination be not construed as it is isolated, they can be mutually combined from
And reach superior technique effect.In the accompanying drawing of following embodiments, it is special that the identical label that each accompanying drawing occurs represents identical
Levy or part, in can be applied to different embodiments.
As shown in Figure 1-2, a kind of partial discharge of switchgear monitoring ultra-high frequency antenna of the utility model, including dielectric layer
1st, aerial radiation layer 2, ground plane 3, feed probes 6, coaxial cable 7, metal installed part 5；
The material of the dielectric layer 1 is epoxy resin, is shaped as square；The ground plane 3 is set in parallel in described
Under dielectric layer 1, size is identical with the dielectric layer 1, and 1 four jiaos of the dielectric layer is separately provided for the superelevation
Frequency antenna is installed on the metal installed part 5 of bottom plate of switch cabinet or side plate, and the dielectric layer 1 and the ground plane 3 are by described
Metal installed part 5 is connected；
Aerial radiation layer 2 is laid in the upper surface of the dielectric layer 1, and the aerial radiation layer 2 is 2 rank graftals
Shape, the 1st rank fractal graph is that the first oval 12 and first rectangle 11 subtracts each other gained figure, and first rectangle 11 is described
Spreading is square in first ellipse 12 reduces 0.5-0.7 times of rear gained；2nd rank fractal graph is the second oval 13 and second rectangle
14 subtract each other gained figure, and described second oval 13 reduces 0.4-0.6 times of gained, institute for the inner ellipse of first rectangle 11
It is the rear gained of square 0.5-0.7 times of the diminution of spreading in second ellipse 13 to state the second rectangle 14；
Be provided with distributing point 4 on aerial radiation layer 2, the one end of the feed probes 6 by the distributing point 4 with it is described
Aerial radiation layer 2 is connected, and the other end is connected with the center copper cash of the coaxial cable 7 being fixed on the ground plane 3, described
Coaxial cable 7 is lain on the ground plane 3.
Metal installed part 5 can be connected with bottom plate of switch cabinet or side plate by 2 kinds of modes, and the first is：Metal installed part 5 one
End is provided with neodymium-iron-boron permanent magnet 8, and the ultra-high frequency antenna passes through 4 neodymium-iron-boron permanent magnets 8 and bottom plate of switch cabinet
Or side plate connection；It is for second：Metal installed part 5 is bolted with bottom plate of switch cabinet or side plate.
The material of the dielectric layer 1 is that relative dielectric constant is the epoxy resin of 3-10；The length of side is 100mm-250mm,
Thickness is 1mm-5mm.
The material of the aerial radiation layer 2 is copper or aluminium or silver that thickness is 5 μm -50 μm, in the aerial radiation
The upper surface of layer 2 is coated with the tin layers that thickness is 3 μm~12 μm；The material of the ground plane 3 is 1 mm~5mm for thickness
Copper coin or aluminium sheet.
The working frequency range of the ultra-high frequency antenna is 500MHz-1500MHz；The passband signal to noise ratio of the ultra-high frequency antenna is small
In equal to 2.5；The directionality of the ultra-high frequency antenna is not less than 170 degree.
In actual use, ground plane 3 can realize reliable ground by any known mode（It is not shown in accompanying drawing 1
Specific earthing mode）, ground plane 3 is set in parallel between dielectric layer 1 and bottom plate of switch cabinet or backboard, dielectric layer 1 and is connect
The air gap is formed between stratum 3, because air has extremely low relative dielectric constant so that aerial radiation layer 2 and ground plane 3
Between overall dielectric constant reduction, be conducive to widen antenna frequency band；The directionality of antenna is effectively improved simultaneously.
The beneficial effects of the utility model are：Antenna is slab construction, only needs to be attached to bottom in monitored switch cubicle during installation
On plate or side plate, small volume will not bring new insulation hidden danger to electrical equipment；Using bolt or neodymium-iron-boron permanent magnet with
Bottom plate of switch cabinet or side plate are connected, and mode is flexible, easy；Aerial radiation layer is 2 rank fractal graphs so that aerial radiation layer surface
Induced-current bending flowing, with lower resonant frequency, significantly reduces the size of antenna；Antenna frequency band range is
500MHz-1500MHz, due to shelf depreciation electromagnetic wave high fdrequency component（More than 1GHz）Decay in propagation medium violent, mainly
Discharge energy concentrates on low-frequency range, and the utility model can effectively receive the hyperfrequency letter of local discharge of electrical equipment generation
Number, and the degree of accuracy of detection is high；Antenna gain high energy receives the faint ultra-high frequency signal of shelf depreciation, there is signal to noise ratio higher
And sensitivity, can in time find shelf depreciation present in electrical equipment；Simple and reasonable for structure, market application foreground is wide.
Although having been presented for several embodiments of the present utility model herein, those skilled in the art should manage
Solution, in the case where the utility model spirit is not departed from, can be changed to the embodiments herein.Above-described embodiment is to show
Example property, should not be using the embodiments herein as the restriction of the utility model interest field.
Claims (9)
1. a kind of partial discharge of switchgear monitoring ultra-high frequency antenna, it is characterised in that including dielectric layer, aerial radiation layer,
Ground plane, feed probes, coaxial cable, metal installed part；
The material of the dielectric layer is epoxy resin, is shaped as square；The ground plane is set in parallel in the dielectric
Under layer, size is identical with the dielectric layer, and the dielectric layer corner is separately provided for pacifying the ultra-high frequency antenna
Metal installed part loaded on bottom plate of switch cabinet or side plate, the dielectric layer and the ground plane are connected by the metal installed part
Connect；
Aerial radiation layer is laid in the dielectric layer upper surface, and the aerial radiation layer is 2 rank fractal graphs, the 1st rank
Fractal graph is that first is oval and the first rectangle subtracts each other gained figure, and first rectangle is spreading in described first oval
It is square to reduce 0.5-0.7 times of rear gained；2nd rank fractal graph is that second is oval and the second rectangle subtracts each other gained figure, described
Second is oval for the described first rectangular inner ellipse reduces 0.4-0.6 times of gained, and second rectangle is described second
Spreading is square in oval reduces 0.5-0.7 times of rear gained；
Distributing point is provided with the aerial radiation layer, described feed probes one end passes through the distributing point and the aerial radiation
Layer connection, the other end is connected with the center copper cash of the coaxial cable being fixed on the ground plane, and the coaxial cable is put down
It is placed on the ground plane.
2. ultra-high frequency antenna as claimed in claim 1, it is characterised in that the metal installed part and bottom plate of switch cabinet or side plate
Connection one end is provided with neodymium-iron-boron permanent magnet, and the ultra-high frequency antenna passes through 4 neodymium-iron-boron permanent magnets and switch cubicle
Base plate or side plate are connected.
3. ultra-high frequency antenna as claimed in claim 1, it is characterised in that the metal installed part and bottom plate of switch cabinet or side plate
It is bolted.
4. ultra-high frequency antenna as claimed in claim 1, it is characterised in that the material of the dielectric layer is relative dielectric constant
It is the epoxy resin of 3-10；The length of side is 100mm-250mm, and thickness is 1mm-5mm.
5. ultra-high frequency antenna as claimed in claim 1, it is characterised in that the material of the aerial radiation layer is 5 μm for thickness
- 50 μm of copper or aluminium or silver, the tin layers that thickness is 3 μm~12 μm are coated with the upper surface of aerial radiation layer.
6. the ultra-high frequency antenna as described in claim any one of 1-5, it is characterised in that the material of the ground plane is for thickness
The copper coin or aluminium sheet of 1 mm~5mm.
7. the ultra-high frequency antenna as described in claim any one of 1-5, it is characterised in that the working frequency range of the ultra-high frequency antenna
It is 500MHz-1500MHz.
8. the ultra-high frequency antenna as described in claim any one of 1-5, it is characterised in that the passband noise of the ultra-high frequency antenna
Than less than or equal to 2.5.
9. the ultra-high frequency antenna as described in claim any one of 1-5, it is characterised in that the directionality of the ultra-high frequency antenna is not
Less than 170 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621177987.5U CN206270450U (en) | 2016-11-03 | 2016-11-03 | A kind of partial discharge of switchgear monitoring ultra-high frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621177987.5U CN206270450U (en) | 2016-11-03 | 2016-11-03 | A kind of partial discharge of switchgear monitoring ultra-high frequency antenna |
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| Publication Number | Publication Date |
|---|---|
| CN206270450U true CN206270450U (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621177987.5U Active CN206270450U (en) | 2016-11-03 | 2016-11-03 | A kind of partial discharge of switchgear monitoring ultra-high frequency antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307787A (en) * | 2018-10-15 | 2019-02-05 | 国网青海省电力公司西宁供电公司 | A kind of fixed device of ultra high-frequency partial discharge sensor |
-
2016
- 2016-11-03 CN CN201621177987.5U patent/CN206270450U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307787A (en) * | 2018-10-15 | 2019-02-05 | 国网青海省电力公司西宁供电公司 | A kind of fixed device of ultra high-frequency partial discharge sensor |
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