CN205720534U - A kind of external sensor for GIS partial discharge detection - Google Patents
A kind of external sensor for GIS partial discharge detection Download PDFInfo
- Publication number
- CN205720534U CN205720534U CN201620355727.6U CN201620355727U CN205720534U CN 205720534 U CN205720534 U CN 205720534U CN 201620355727 U CN201620355727 U CN 201620355727U CN 205720534 U CN205720534 U CN 205720534U
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- China
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- sensor
- aerofoil profile
- paster antenna
- outer housing
- gis
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Abstract
The utility model discloses a kind of external sensor for GIS partial discharge detection, including: for receiving the aerofoil profile paster antenna of electromagnetic wave signal produced by GIS partial discharge；The outside of aerofoil profile paster antenna is coated with the sensor outer housing on the disc insulator for being fixed on GIS, and sensor outer housing is additionally operable to encapsulate aerofoil profile paster antenna, and shielding external interference signals；Sensor outer housing is provided with the feed N-type coaxial fitting for connecting external feed coaxial cable；It is additionally provided with in sensor outer housing for connecting aerofoil profile paster antenna and the first coaxial cable of feed N-type coaxial fitting.When designing sensor, the parameters such as the shapes and sizes according to aerofoil profile paster antenna can regulate and define return loss and the band bandwidth of sensor, corresponding with the primary bands of the electromagnetic wave signal that disc insulator is revealed to realize, thus ensure that sensor has wider detection bandwidth and higher sensitivity.
Description
Technical field
This utility model relates to Electric Power Equipment Insulation condition diagnosing technical field, particularly relates to a kind of for GIS local
The external sensor of discharge examination.
Background technology
It is little, reliable that gas insulated combined electrical equipment (Gas Insulated Switchgear, GIS) has occupation of land space
Property advantages of higher, in transformer station, gradually obtain extensively application.GIS may produce impact insulation in assembling and running
The defect of performance, produces metal particle etc. as produced on centre pilot in cut, chopper interrupting process.GIS uses high gas
Pressure SF6Gas-insulated, and internal electric field is slightly non-uniform field, the internal defect existed can cause internal field to strengthen, initiation office
Discharge even insulation breakdown in portion.
Wherein, shelf depreciation shows as the current impulse that rising edge is extremely steep, pulsewidth is the narrowest, can inspire super high band
The electromagnetic wave of (300MHz～3GHz).The coaxial configuration of GIS is a good waveguide, can effectively propagate shelf depreciation and produce
Raw electromagnetic wave signal, therefore may utilize antenna and receives electromagnetic wave signal and then detection shelf depreciation.The GIS of on-the-spot transformer station has
Many intervals composition, uses disc insulator segmentation between each interval, disc insulator plays mechanical support and gas barrier
Both sides effect.The electromagnetic wave signal that shelf depreciation produces can be by open type disc insulator or close the watering of disc insulator
Blowhole leaks, and therefore sensor can be arranged on disc insulator the electromagnetic wave signal revealed with detection, this biography
Sensor is referred to as external sensor.External sensor has and does not invades GIS cavity and many advantages such as easy for installation,
GIS partial discharge pressure test and live detection all obtain extensively application.
Have GIS external sensor at present and include rectangular patch antenna, electromagnetic horn, dipole antennas etc..But, square
It is the narrowest that shape paster antenna receives frequency range, and detection sensitivity is low；Electromagnetic horn volume is excessive, not readily portable；Dipole sky
Although line simple in construction, but need rationally to select position when installing, it is desirable to Field Force has certain antenna foundation knowledge.Separately
Outward, the most many effective detection bandwidth of antenna are without appropriate design, it is impossible to the main frequency that disc insulator reveals electromagnetic wave
Band is mapped (600MHz～2GHz), and therefore detection sensitivity is the highest.
Therefore, how a kind of detection sensitivity height is provided, is easy to carry and is applicable to the GIS external of on-the-spot application locally
Discharge examination sensor is that those skilled in the art are presently required and solve the technical problem that.
Utility model content
The purpose of this utility model is to provide a kind of external sensor for GIS partial discharge detection, has higher
Detection woods sensitivity, and be easy to carry, it is adaptable to on-the-spot application.
For solving above-mentioned technical problem, this utility model provides following technical scheme:
A kind of external sensor for GIS partial discharge detection, including:
For receiving the aerofoil profile paster antenna of electromagnetic wave signal produced by GIS partial discharge；
The outside of described aerofoil profile paster antenna is coated with outside the sensor on the disc insulator for being fixed on described GIS
Shell, described sensor outer housing is additionally operable to encapsulate described aerofoil profile paster antenna, and shielding external interference signals；
Described sensor outer housing is provided with the feed N-type coaxial fitting for connecting external feed coaxial cable；
It is additionally provided with in described sensor outer housing for connecting described aerofoil profile paster antenna and described feed N-type coaxial fitting
First coaxial cable.
Preferably, described aerofoil profile paster antenna includes:
Dielectric substrate and two panels aerofoil profile metal patch, described two panels aerofoil profile metal patch is symmetricly set on described dielectric substrate
On, and respectively arrange one on described two panels aerofoil profile metal patch for the via being connected with described first coaxial cable and screen layer
Pad.
Preferably, described aerofoil profile metal patch is trapezoidal metal patch, and the altitude range of described trapezoidal metal patch is
20mm～40mm, including endpoint value；Subtended angle scope between two waists of described trapezoidal metal patch is 90 °～120 °, including end
Point value.
Preferably, described sensor outer housing is metal shell, and the bottom of described metal shell includes one for holding described GIS
It is uncovered that electromagnetic wave signal produced by shelf depreciation enters, the bottom surface of described metal shell and described aerofoil profile paster antenna place
Plane is parallel, and the distance range of the bottom surface of described aerofoil profile paster antenna place plane and described metal shell is 20mm～40mm,
Including endpoint value.
Preferably, what the sidewall of described metal shell was that the disc insulator with described GIS fits is arc
Metal sidewall.
Preferably, described aerofoil profile paster antenna is watered by casting glue and casts from described sensor outer housing.
Preferably, the open circles tubular for supporting and fix described aerofoil profile paster antenna it is provided with in described sensor outer housing
Support member.
Preferably, described dielectric substrate is FR-4 epoxy glass cloth laminated board.
Compared with prior art, technique scheme has the advantage that
A kind of external sensor for GIS partial discharge detection that this utility model embodiment is provided, including: use
In receiving the aerofoil profile paster antenna of electromagnetic wave signal produced by GIS partial discharge；The outside of aerofoil profile paster antenna is coated with use
Sensor outer housing on the disc insulator being fixed on GIS, sensor outer housing is additionally operable to encapsulate aerofoil profile paster antenna, Yi Jiping
Cover external interference signals；Sensor outer housing is provided with the feed N-type coaxial fitting for connecting external feed coaxial cable；Sensing
It is additionally provided with in device shell for connecting aerofoil profile paster antenna and the first coaxial cable of feed N-type coaxial fitting.Due to sensor
Have employed aerofoil profile paster antenna, when designing sensor, can regulate according to parameters such as the shapes and sizes of aerofoil profile paster antenna
Return loss and band bandwidth with definition sensor so that in the range of the frequency band of antenna falls within 600MHz～2GHz, with reality
The primary bands of the electromagnetic wave signal now revealed with disc insulator is mapped, thus ensure that sensor has wider inspection
Measuring tape width and higher sensitivity, additionally, sensor housing has the function of shielding external interference signals, outside can effectively reducing
The intensity of portion's noise signal, improves the noise immunity of the detecting system at sensor place.Owing to the parameter of antenna is set, in peace
Only sensor outer housing need to be fixed on the disc insulator of GIS during dress, it is simple to on-the-spot application.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is this
Some embodiments of utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawing can be obtained according to these accompanying drawings.
The external for GIS partial discharge detection that Fig. 1 is provided by a kind of detailed description of the invention of this utility model passes
Sensor top view；
The external for GIS partial discharge detection that Fig. 2 is provided by a kind of detailed description of the invention of this utility model passes
The perspective view of sensor；
The external for GIS partial discharge detection that Fig. 3 is provided by a kind of detailed description of the invention of this utility model passes
The aerofoil profile patch-antenna structure schematic diagram of sensor；
The patch width L of the aerofoil profile paster antenna that Fig. 4 is provided by a kind of embodiment of this utility model is to return loss
Affect schematic diagram；
The trapezoidal metal patch subtended angle of the aerofoil profile paster antenna that Fig. 5 is provided by a kind of embodiment of this utility model is to returning
What ripple was lost affects schematic diagram；
The distance of the aerofoil profile paster antenna distance metal shell bottom surface that Fig. 6 is provided by a kind of embodiment of this utility model
Return loss affected schematic diagram；
The external sensor for GIS partial discharge detection that Fig. 7 is provided by a kind of embodiment of this utility model
The equivalent altitude curve chart of actual measurement.
Detailed description of the invention
Core of the present utility model is to provide a kind of external sensor for GIS partial discharge detection, has higher
Detection woods sensitivity, and be easy to carry, it is adaptable to on-the-spot application.
Understandable in order to enable above-mentioned purpose of the present utility model, feature and advantage to become apparent from, the most right
Detailed description of the invention of the present utility model is described in detail.
Elaborate detail in the following description so that fully understanding this utility model.But this utility model can
Being different from alternate manner described here implement with multiple, those skilled in the art can be without prejudice to this utility model intension
In the case of do similar popularization.Therefore this utility model is not limited by following public detailed description of the invention.
Refer to Fig. 1 and Fig. 2, Fig. 1 by a kind of detailed description of the invention of this utility model provided for GIS partial discharge
The external sensor top view of detection；Fig. 2 is put for GIS local by what a kind of detailed description of the invention of this utility model provided
The perspective view of the external sensor of electro-detection.
In a kind of detailed description of the invention of the present utility model, a kind of external sensing for GIS partial discharge detection
Device, including: for receiving the aerofoil profile paster antenna 2 of electromagnetic wave signal produced by GIS partial discharge, wherein, so-called aerofoil profile
Paster antenna refers to the antenna that paster geometry is similar to the both wings of butterfly；The outside of aerofoil profile paster antenna 2 be coated with for
The sensor outer housing 1 being fixed on the disc insulator of GIS, sensor outer housing 1 is additionally operable to encapsulate aerofoil profile paster antenna 2, and
Shielding external interference signals；Sensor outer housing 1 is provided with the feed N-type coaxial fitting 3 for connecting external feed coaxial cable；
It is additionally provided with in sensor outer housing 1 for connecting aerofoil profile paster antenna and the first coaxial cable 4 of feed N-type coaxial fitting.
In the present embodiment, owing to sensor have employed aerofoil profile paster antenna, when designing sensor, paste according to aerofoil profile
The parameters such as the shapes and sizes of chip antenna can regulate and define return loss and the band bandwidth of sensor so that antenna
In the range of frequency band falls within 600MHz～2GHz, to realize rise corresponding with the primary bands of the electromagnetic wave signal that disc insulator is revealed
Come, thus ensure that sensor has wider detection bandwidth and higher sensitivity, additionally, sensor housing has outside shielding
The function of portion's interference signal, can effectively reduce the intensity of external noise signals, resisting of the detecting system at raising sensor place
Making an uproar property.Owing to the parameter of antenna is set, only sensor outer housing need to be fixed on the disc insulator of GIS i.e. when mounted
Can, it is simple to on-the-spot application.
Refer to Fig. 3, Fig. 4 and Fig. 5, Fig. 3 by a kind of detailed description of the invention of this utility model provided for GIS local
The aerofoil profile patch-antenna structure schematic diagram of the external sensor of discharge examination；Fig. 4 is this utility model one embodiment institute
The patch width L of aerofoil profile paster antenna provided affects schematic diagram to return loss；Fig. 5 is this utility model one embodiment party
The trapezoidal metal patch subtended angle of the aerofoil profile paster antenna that formula is provided affects schematic diagram to return loss.
On the basis of above-mentioned embodiment, in this utility model one embodiment, aerofoil profile paster antenna includes: medium
Substrate 22 and two panels aerofoil profile metal patch 21, two panels aerofoil profile metal patch 21 is symmetricly set on dielectric substrate 22.In this enforcement
In mode, preferably dielectric substrate is rectangle substrate, and dielectric substrate is FR-4 epoxy glass cloth laminated board, and two panels aerofoil profile metal pastes
Sheet 21 is positioned opposite relative to the centrage of dielectric substrate 22, and the lower surface of aerofoil profile metal patch 21 is pasted at dielectric substrate 22
Upper surface.And respectively arrange one on two panels aerofoil profile metal patch for the eyelet welding excessively being connected with the first coaxial cable and screen layer
Dish, so-called screen layer refers to the screen layer of coaxial cable, and it is a part for coaxial cable, forms the impedance of 50 ohm,
For shielding the interference of external electromagnetic waves, thus the GIS partial discharge that the antenna of two panels aerofoil profile metal patch composition will receive
Produced electromagnetic wave signal is transferred to other external detection equipment by the first coaxial cable and feed N-type coaxial fitting
In, obtain GIS partial discharge information for user.
Wherein, in the present embodiment, preferably aerofoil profile metal patch is trapezoidal metal patch, more preferably isosceles ladder
Shape metal patch, the altitude range of trapezoidal metal patch is 20mm～40mm, including endpoint value；Two waists of trapezoidal metal patch it
Between subtended angle scope be 90 °～120 °, including endpoint value.In the present embodiment, aerofoil profile metal patch is trapezoidal metal patch
Sheet, then affect the patch width L that major parameter is this metal patch and subtended angle θ of its performance.Wherein, patch width L is the most trapezoidal
The height of metal patch, patch width is limited by the size institute of GIS disc insulator, it is impossible to be wider than the width of disc insulator,
The altitude range of the most trapezoidal metal patch is 20mm～40mm, in the present embodiment, can pass through
Frequency electromagnetic waves simulation software emulates the Specifeca tion speeification of this sensor, and then optimizes the size designing trapezoidal metal patch,
Wherein, the main performance index of this sensor is return loss S11, which characterizes the sensor reflection journey to radiated electromagnetic wave
Degree, the least then return loss of degree of reflection is the least, and the ability of antenna receiving signal is the strongest.Design sensor is required in engineering
In frequency range, return loss S11 is less than-10dB.
In the present embodiment, the patch width L to this trapezoidal metal patch take respectively 10mm, 15mm, 20mm, 25mm,
Return loss S during 30mm and 35mm11Emulating, result is as shown in Figure 4, it is known that the increase of patch width can reduce detection frequency
Band and return loss, in order to ensure that sensor has preferable detection bandwidth, choosing of patch width falls within 600MHz with frequency band
～in the range of 2GHz and return loss is tried one's best low for standard, in present embodiment, then preferably patch width L=30mm.
Additionally, return loss S when trapezoidal metal patch subtended angle θ is taken 30 °, 60 °, 90 °, 120 ° and 150 °11Imitate
Very, result is as shown in Figure 5, it is known that the increase of subtended angle θ can reduce detection frequency band but return loss can be made to increase, and patch width
Choose and fall within 600MHz～2GHz scope with frequency band and return loss is tried one's best low as standard.In the present embodiment, it is therefore preferable that subtended angle
θ=90 °.
It should be noted that present embodiment be preferred L=30mm, θ=90 °, patch width and subtended angle value according to
It is actually needed and is designed, do not limit at this.
In a kind of embodiment of the present utility model, sensor outer housing is metal shell, and the bottom of metal shell includes
One for holding the uncovered of electromagnetic wave signal entrance produced by GIS partial discharge, the bottom surface of metal shell and aerofoil profile paster antenna
Place plane is parallel, and the distance range of the bottom surface of aerofoil profile paster antenna place plane and metal shell is 20mm～40mm, including
Endpoint value.The sidewall of metal shell is that the disc insulator with GIS fits while being the metal sidewall of arc.Aerofoil profile paster
Antenna is watered by casting glue and casts from sensor outer housing.As it is shown in figure 1, be provided with for supporting and fixing in preferred sensor outer housing
The open circles cylindrical supports 6 of aerofoil profile paster antenna.
Use metal shell can effectively shield the interference signal in the external world, reduce the intensity of external noise signals, and cost
Cheap, anti-destructive is strong, can effectively protect its interior aerofoil profile paster antenna.In the present embodiment, metal shell and benzvalene form
The recording quantity of insulator contact, i.e. metal shell side is provided with uncovered, when mounted by the disc insulator of uncovered alignment GIS
Plug hole install, preferred metal sidewall is circular arc at the edge of uncovered side so that metal shell and the basin of GIS
Formula insulator is in close contact, and the interference signal outside metal shell can be prevented by between metal shell and disc insulator
Gap enters in metal shell, can guarantee that again the electromagnetic wave signal that GIS partial discharge produces is entered by the plug hole of disc insulator
Enter in sensor.Especially aerofoil profile paster antenna is watered by casting glue and casts from sensor outer housing, it is ensured that the steadiness of antenna
And scene application so that sensor global design is firm, and anti-destructive is higher, and wherein, preferably casting glue is epoxy resin encapsulated
Glue, the first coaxial cable also can be cast in metal shell while being cast in metal shell by antenna by casting glue, can
With ensure the signal of antenna by the first coaxial cable transmission to extraneous, it is to avoid due to the factors such as vibrations cause first coaxial
Cable and antenna loose contact.And be provided with in sensor outer housing and prop up for supporting and fix the open circles tubular of aerofoil profile paster antenna
Support member, it is ensured that aerofoil profile paster antenna position is fixing during using casting glue casting, and casting glue can be by opening stream
Enter in open circles cylindrical supports, it is ensured that the complete solid embedding of whole sensor.
In the present embodiment, after aerofoil profile paster antenna is cast in metal shell, by metal shell and epoxy resin
The impact of casting glue, antenna performance can change, and especially aerofoil profile paster antenna and metal shell distance from bottom affects antenna
Performance.Distance metal shell distance from bottom is designed by frequency electromagnetic waves simulation software simulation optimization, adjust the distance metal shell away from
Return loss when being taken as 10mm, 20mm, 30mm and 40mm respectively from d emulates, result as shown in Figure 6, aerofoil profile paster sky
In the range of the choosing of distance bottom linear distance metal shell falls within 600MHz～2GHz with frequency band and return loss is tried one's best and low is
Standard, falls in the position at the center that relativelys close to of 600MHz～2GHz and return loss relatively in d=20mm time-frequency band as shown in Figure 6
Low, therefore preferred d=20mm in the present embodiment.
Additionally, utilize GHz transverse electric and magnetic field room to survey the equivalent altitude ginseng of this utility model externally positioned type sensor
Number, its result is as shown in Figure 7.Sensor the most provided by the utility model is in the range of 500MHz～1800MHz etc.
Effect height parameter He is more than 5mm, and average height is 17.1mm, can effectively meet the measurement of superfrequency shelf depreciation.
In sum, the external sensor for GIS partial discharge detection provided by the utility model, its antenna chi
Very little and antenna all designs through optimization with metal shell spacing etc. so that this sensor detection bandwidth and disc insulator electricity
It is consistent that magnetic wave reveals frequency range, thus ensure that wider detection bandwidth and higher sensitivity.Secondly, use casting glue by aerofoil profile
Paster antenna waters and casts from metal shell so that global design is the firmest, and anti-destructive is strong, it is adaptable to the local of on-the-spot GIS
Discharge examination, and being relatively small in size of sensor, it is simple to carry.Finally, the receiving plane of antenna is towards disc insulator, antenna
The outside sensor outer housing being to have function of shielding, can effectively reduce the intensity of external noise, improve whole detecting system
Noise immunity.
This utility model is provided a kind of external sensor for GIS partial discharge detection carried out in detail above
Introduce.Principle of the present utility model and embodiment are set forth by specific case used herein, above example
Illustrate that being only intended to help understands this utility model and core concept thereof.It should be pointed out that, the ordinary skill for the art
For personnel, on the premise of without departing from this utility model principle, it is also possible to this utility model is carried out some improvement and modification,
These improve and modification also falls in this utility model scope of the claims.
Claims (8)
1. the external sensor for GIS partial discharge detection, it is characterised in that including:
For receiving the aerofoil profile paster antenna of electromagnetic wave signal produced by GIS partial discharge；
The outside of described aerofoil profile paster antenna is coated with the sensor outer housing on the disc insulator for being fixed on described GIS,
Described sensor outer housing is additionally operable to encapsulate described aerofoil profile paster antenna, and shielding external interference signals；
Described sensor outer housing is provided with the feed N-type coaxial fitting for connecting external feed coaxial cable；
It is additionally provided with in described sensor outer housing for connecting described aerofoil profile paster antenna and the first of described feed N-type coaxial fitting
Coaxial cable.
Sensor the most according to claim 1, it is characterised in that described aerofoil profile paster antenna includes:
Dielectric substrate and two panels aerofoil profile metal patch, described two panels aerofoil profile metal patch is symmetricly set on described dielectric substrate,
And respectively arrange one on described two panels aerofoil profile metal patch and cross eyelet welding for be connected with described first coaxial cable and screen layer
Dish.
Sensor the most according to claim 2, it is characterised in that described aerofoil profile metal patch is trapezoidal metal patch, institute
The altitude range stating trapezoidal metal patch is 20mm～40mm, including endpoint value；Between two waists of described trapezoidal metal patch
Subtended angle scope is 90 °～120 °, including endpoint value.
4. according to the sensor described in any one of claims 1 to 3, it is characterised in that described sensor outer housing is metal shell,
The bottom of described metal shell includes one for holding the uncovered of electromagnetic wave signal entrance produced by described GIS partial discharge, institute
The bottom surface stating metal shell is parallel with described aerofoil profile paster antenna place plane, described aerofoil profile paster antenna place plane and described
The distance range of the bottom surface of metal shell is 20mm～40mm, including endpoint value.
Sensor the most according to claim 4, it is characterised in that the sidewall of described metal shell is and the basin of described GIS
That formula insulator fits while being the metal sidewall of arc.
Sensor the most according to claim 5, it is characterised in that described aerofoil profile paster antenna is watered by casting glue and casts from institute
State in sensor outer housing.
Sensor the most according to claim 6, it is characterised in that be provided with in described sensor outer housing for supporting and consolidating
The open circles cylindrical supports of fixed described aerofoil profile paster antenna.
Sensor the most according to claim 2, it is characterised in that described dielectric substrate is FR-4 epoxy glass fabric lamination
Plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620355727.6U CN205720534U (en) | 2016-04-22 | 2016-04-22 | A kind of external sensor for GIS partial discharge detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620355727.6U CN205720534U (en) | 2016-04-22 | 2016-04-22 | A kind of external sensor for GIS partial discharge detection |
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| Publication Number | Publication Date |
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| CN205720534U true CN205720534U (en) | 2016-11-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676094A (en) * | 2016-04-22 | 2016-06-15 | 国网浙江省电力公司电力科学研究院 | External sensor for GIS partial discharge detection |
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2016
- 2016-04-22 CN CN201620355727.6U patent/CN205720534U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676094A (en) * | 2016-04-22 | 2016-06-15 | 国网浙江省电力公司电力科学研究院 | External sensor for GIS partial discharge detection |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 |