CN207133389U - Gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig - Google Patents
Gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig Download PDFInfo
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- CN207133389U CN207133389U CN201721217747.8U CN201721217747U CN207133389U CN 207133389 U CN207133389 U CN 207133389U CN 201721217747 U CN201721217747 U CN 201721217747U CN 207133389 U CN207133389 U CN 207133389U
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Abstract
The utility model discloses a kind of gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig, it is characterized in that：By forming pulse current of PD test platform without partial discharge voltage source, coupled capacitor, measurement impedance and PD meter, GIS models are set, metallic conductor in positive terminal connection GIS models without partial discharge voltage source, the shell of the negative pole end connection GIS models of no partial discharge voltage source and ground connection；In the GIS models place artificial defect model, on GIS models respectively set built in extra-high video sensor and external extra-high video sensor, detected using output signal of the oscillograph for built-in extra-high video sensor and external extra-high video sensor.The utility model is used to before the installation of extra-high video sensor be tested and determines best position, and foundation is provided for the work of GIS sensor arrangements.
Description
Technical field
The utility model belongs to local discharge of electrical equipment detection technique field, more particularly to gas-insulated stacked switch is set
Standby superfrequency sensor arrangement experimental rig.
Background technology
Insulation fault is one of major failure that power equipment may occur in operation, and insulation fault occurs for power equipment
Before, it will usually there are the shelf depreciation gradually developed a process, i.e. Partial Discharge, referred to as partial discharge or PD, finally
Cause insulation breakdown.Therefore, the on-line monitoring for shelf depreciation can be to ensure power equipment safety, stable and reliability service
And the repair based on condition of component of power equipment provides technical support.Since phase at the beginning of the eighties in last century, for gas-insulated stacked switch
Partial-discharge ultrahigh-frequency (the Ultra High of equipment (Gas Insulated Switchgear, referred to as GIS)
Frequency, referred to as UHF) detection technique develops rapidly and positive effect progressively played in engineering, achieves a large amount of
Achievement.When shelf depreciation is occurring in the range of very little, gas breakdown process quickly, will produce very steep pulse current,
Its rise time is less than 1ns, and stimulating frequency is up to number GHz electromagnetic wave in equipment cavity.The original substantially of UHF detection techniques
Reason is that the ultrahigh frequency electromagnetic wave signal for being up to 300MHz~3GHz to frequency caused by shelf depreciation by type UHF sensor is carried out
Detection, so as to obtain the relevant information of shelf depreciation.UHF detection methods are compared with other shelf depreciation online measuring techniques, are had
Detection sensitivity is high, live strong antijamming capability, shelf depreciation tuning on-line can be achieved and beneficial to insulation defect type identification etc.
Advantage.
Type UHF sensor is the key of UHF partial discharge monitoring systems, can be divided into built-in sensors by its installation site
And outer sensor.External sensor operation and maintenance is convenient, and size and mechanical property requirements are relatively low, and cost is low, are applied to
The old-fashioned GIS for installing built-in sensors or can not be difficult to.But because the decay of electromagnetic signal, and sensor are directly exposed to outside
The electromagnetic interference being subject in boundary space, the sensitivity of external sensor are relatively low.Under relatively, built-in sensor is sensitive
Degree is high, strong antijamming capability, but the cost for making and installing is also higher, is typically mounted directly internally when equipment produces.
Under many circumstances, whole GIS can not be completely covered in the effective range of a type UHF sensor, thus usually needs to pacify in GIS
Fill multiple type UHF sensors.From economy and from the perspective of maintaining easily, on the basis of partial discharge monitoring requirement is met,
The number of sensor should be more few better.Either external or built-in, the difference of sensor positioning scheme can all give testing result
Bring specific influence；The experiment for sensor arrangement method in GIS and correlation is applied in the course of receiving in the prior art
In, i.e., after sensor installation, determine whether the arrangement meets actual requirement by testing；But for how to obtain
The optimal installation of sensor does not have related report to arrangement so far.
Utility model content
The utility model is to avoid the weak point present in above-mentioned prior art, there is provided a kind of gas-insulated combination is opened
Equipment superfrequency sensor arrangement experimental rig and application are closed, to be tested before the installation of extra-high video sensor
And best position is determined, provide foundation for the work of GIS sensor arrangements.
The utility model adopts the following technical scheme that to solve technical problem：
The characteristics of the utility model gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig is：By without office
Discharge potential source, coupled capacitor, measurement impedance and PD meter composition pulse current of PD test platform, sets GIS models, nothing
Metallic conductor in the positive terminal connection GIS models 5 of partial discharge voltage source, the negative pole end connection GIS models of no partial discharge voltage source
Shell is simultaneously grounded；In the GIS models place artificial defect model, on the GIS models respectively set built in superfrequency
Sensor and external extra-high video sensor, using oscillograph for the built-in extra-high video sensor and external extra-high video sensor
Output signal detected.
The design feature of the utility model gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig also exists
In：The GIS models are straight tube shape, and the GIS models are divided into three air chambers by two unmasked disc insulators, and two non-
It is separated by 1000mm between shielding disc insulator, interjacent air chamber is provided with manhole, diameter 250mm, the circle
Through hole can carry out sealing using the metal cover board with sealing ring prevents SF6 gases from leaking；Built-in extra-high video sensor installation
Inserted on the metal cover board in the manhole of GIS models；External extra-high video sensor is arranged on non-using fixing device
Shield on disc insulator.
The design feature of the utility model gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig also exists
In：The built-in extra-high video sensor uses collar plate shape sensor, and the external extra-high video sensor is passed using logarithm period type
Sensor.
The design feature of the utility model gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig also exists
In：The artificial defect model uses free metal corpuscular model, and the free metal corpuscular model uses tubular lucite
Cover, set top crown, bottom that bottom crown is set at the top of the plexiglass tent, be in the plate electrode above bottom crown by prolonging
Long column is fixed, and steel ball is placed on bottom crown；It is connected using top crown with the high-pressure side of the metallic conductor in GIS models, lower pole
Plate is connected with the shell of GIS models, and free metal grain defect is simulated with steel ball.
Compared with the prior art, the utility model has the beneficial effect that：
The utility model device is simple, test method is efficient, and practical effect is good, can be carried out before sensor is installed
Test and determine best position, reliable basis are provided for the arrangement work of GIS ultrahigh frequency sensor.
Brief description of the drawings
Fig. 1 is experimental rig structural representation in the utility model；
Fig. 2 is artificial defect model structure schematic diagram.
Label in figure：1 without partial discharge voltage source, and 2 coupled capacitors, 3 measurement impedances, 4 PD meters, 5 be GIS models, and 6 is artificial scarce
Fall into model, extra-high video sensor built in 7,8 external extra-high video sensors, 9 oscillographs, 11 plexiglass tents, 12 top crowns, 13 gas
Hole, 14 extended columns, 15 plate electrodes, 16 steel balls, 17 bottom crowns.
Embodiment
Referring to Fig. 1, the structure of gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig in the present embodiment
Form is：By without partial discharge voltage source 1, coupled capacitor 2, measurement impedance 3 and PD meter 4 according to GB/T 7354-2003 standards《Office
Portion's discharge measuring》Form pulse current of PD test platform；GIS models 5 are set, and the positive terminal of no partial discharge voltage source 1 connects
Connect the metallic conductor in GIS models 5, the shell of the negative pole end connection GIS models 5 of no partial discharge voltage source 1 and ground connection；In GIS moulds
Artificial defect model 6 is placed in type 5, extra-high video sensor 7 built in setting and external superfrequency sense respectively on GIS models 5
Device 8, detected using output signal of the oscillograph 9 for built-in extra-high video sensor 7 and external extra-high video sensor 8；Show
Ripple device 9 selects Tyke DPO70604B, has four-way, 6GHz bandwidth, 25G sample rates.
As shown in figure 1, GIS models 5 are straight tube shape, the inner chamber of GIS models 5 is divided into by two unmasked disc insulators
Three air chambers, it is separated by 1000mm between two unmasked disc insulators, circle is provided with the side wall of interjacent air chamber
Through hole, diameter 250mm, manhole can carry out sealing using the metal cover board with sealing ring prevents SF6 gases from leaking；It is interior
Extra-high video sensor 7 is put to insert in the manhole of GIS models 5 on metal cover board；External extra-high video sensor 8 utilizes
Fixing device is arranged on unmasked disc insulator；Built-in extra-high video sensor 7 uses collar plate shape sensor, external superfrequency
Sensor 8 uses logarithm period type sensor.
Referring to Fig. 2, artificial defect model 6 uses free metal corpuscular model, and free metal corpuscular model is using in side wall
Tubular plexiglass tent 11 provided with stomata 13, set top crown 12, bottom that bottom crown 17 is set at the top of plexiglass tent,
The plate electrode 15 for being in the top of bottom crown 17 is fixed by extended column 14, and steel ball 16 is placed on bottom crown 17；Utilize top crown 12
It is connected with the high-pressure side of the metallic conductor in GIS models 5, bottom crown 17 is connected with the shell of GIS models 5, with the mould of steel ball 16
Intend free metal grain defect.Free metal particulate is most common in GIS and one of fault type of harm maximum, free metal
The shelf depreciation that particulate triggers thus as one of most important watch type during partial discharge monitoring.International bulk power grid meeting
CIGRE is discussed when being compared to UHF methods and conventional pulse current method, it is recommended to use free metal particulate is as partial discharge source.
Gas-insulated stacked switch equipment superfrequency sensor arrangement test method is in the present embodiment, using the present embodiment
Middle gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig, is tested as follows：
If step 1, waiting to arrange that extra-high video sensor is built-in extra-high video sensor, will built in extra-high video sensor installation
Inserted on metal cover board in the manhole of GIS models 5；, will be outer if it is external extra-high video sensor to treat placement sensor
Extra-high video sensor is put to be arranged on using fixing device on the unmasked disc insulator of GIS models 5；In the inside of GIS models 5
Artificial defect model 6 is placed, artificial defect model 6 is in close on the position of extra-high video sensor.
Step 2, after the structure of pulse current of PD test platform is completed, no partial discharge voltage source 1 is stepped up
Test voltage, the minimum output of signal can be detected to oscillograph 9, i.e. signal to noise ratio is 2：1, stop boosting；Now, oscillograph 9
It is upper obvious pulse signal occur, record the partial discharge quantity now shown on PD meter 4, the most I measuring as detecting system
Electricity qmin。
Step 2, the ceiling capacity allowed with the estimation of 5pC partial discharge quantities when arranging single extra-high video sensor are decayed
AmaxSuch as formula (1)：
Step 3, the structure according to GIS models 5, location arrangements first at the edge the most of GIS models 5 are extra-high to be kept pouring in
Sensor, and outwards expand and search out the position of second extra-high video sensor so that between two positions discontinuous part decay because
Son superposition and Σ are not more than 2Amax；Same method continually looks for the installation site of the 3rd extra-high video sensor, until all
The effective detection distance of extra-high video sensor covers whole GIS models 5.The signified position cloth at the edge the most of GIS models 5
First extra-high video sensor is put, can be that arrangement first is external on the rightmost side unmasked disc insulator of GIS device 5
Extra-high video sensor, or extra-high video sensor built in first is arranged on the rightmost side metal cover board of GIS device 5.
Discontinuously part decay factor is respectively：First disc insulator 7dB, follow-up disc insulator 3dB, L-type structure
10dB, T-type structure straight line portion 6dB, T-type structure vertical component 10dB.
Most I measuring electricity qminFor key factor, most I measuring electricity q is utilizedminFind the limit in arrangement
Value；Most I measuring electricity qminIt is meant that detecting system is directed to specific typical shelf depreciation type institute energy in the case where examining and determine environment
The minimum discharge capacity pC of detection, also referred to as detection sensitivity.In the international standard IEC60270 for pulse current method, it is desirable to
GIS partial discharges monitoring system should be able to meet 5pC detection sensitivity, i.e., electrical equipment is when producing the partial discharge more than 5pC, prison
Examining system should be able to measure signal.But in UHF partial discharge monitoring methods, partial discharge quantity is can not be measured directly, is this
Need the output quantity i.e. pulse electrical signal in UHF partial discharge monitoring methods, be that discharge capacity associates with the output quantity of PD meter.Grind
Study carefully discovery, partial discharge quantity square has positively related linear relationship between the energy of signal UHF pulse signals.Thus may be used
The ceiling capacity decay A allowed during obtaining single sensor arrangementmaxSuch as formula (2)：
W5pcCorresponding oscilloscope signal energy, W when being 5pC shelf depreciationsqminIt is corresponding when there is most I measuring electricity
Oscilloscope signal energy.
Claims (4)
1. a kind of gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig, it is characterized in that：By without partial discharge voltage
Source (1), coupled capacitor (2), measurement impedance (3) and PD meter (4) form pulse current of PD test platform, set GIS
Model (5), the positive terminal connection GIS models of no partial discharge voltage source (1)（5）In metallic conductor, no partial discharge voltage source (1) it is negative
The shell of extreme connection GIS models (5) and ground connection；Artificial defect model (6) is placed in the GIS models (5), described
Extra-high video sensor (7) and external extra-high video sensor (8) built in being set respectively on GIS models (5), it is right using oscillograph (9)
Detected in the output signal of the built-in extra-high video sensor (7) and external extra-high video sensor (8).
2. gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig according to claim 1, its feature
It is：The GIS models (5) are straight tube shape, and the GIS models (5) are divided into three air chambers by two unmasked disc insulators,
It is separated by 1000mm between two unmasked disc insulators, interjacent air chamber is provided with manhole, diameter 250mm, institute
State manhole can using with sealing ring metal cover board carry out sealing prevent SF6 gases leak；Built-in superfrequency sensing
Device (7) is arranged on the metal cover board and inserted in the manhole of GIS models (5)；External extra-high video sensor (8) is using admittedly
Device is determined on unmasked disc insulator.
3. gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig according to claim 1, its feature
It is：The built-in extra-high video sensor (7) uses collar plate shape sensor, and the external extra-high video sensor (8) is using to several weeks
Phase type sensor.
4. gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig according to claim 1, its feature
It is：The artificial defect model (6) uses free metal corpuscular model, and the free metal corpuscular model uses the organic glass of tubular
Glass cover (11), set top crown (12), bottom that bottom crown (17) is set at the top of the plexiglass tent, be in bottom crown
(17) plate electrode (15) above is fixed by extended column (14), and steel ball (16) is placed on bottom crown (17)；Utilize top crown
(12) high-pressure side with the metallic conductor in GIS models (5) is connected, and bottom crown (17) is connected with the shell of GIS models (5),
Free metal grain defect is simulated with steel ball (16).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721217747.8U CN207133389U (en) | 2017-09-21 | 2017-09-21 | Gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig |
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| CN201721217747.8U CN207133389U (en) | 2017-09-21 | 2017-09-21 | Gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505551A (en) * | 2017-09-21 | 2017-12-22 | 国家电网公司 | Gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig and application |
| CN109324272A (en) * | 2018-11-13 | 2019-02-12 | 中国电力科学研究院有限公司 | It is a kind of to examine trouble unit of the GIL based on manual discharge for extra-high voltage electrified |
| CN110146838A (en) * | 2019-05-07 | 2019-08-20 | 广东电网有限责任公司 | A kind of built-in metal foil partial discharge sensor determines ginseng method |
-
2017
- 2017-09-21 CN CN201721217747.8U patent/CN207133389U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505551A (en) * | 2017-09-21 | 2017-12-22 | 国家电网公司 | Gas-insulated stacked switch equipment superfrequency sensor arrangement experimental rig and application |
| CN109324272A (en) * | 2018-11-13 | 2019-02-12 | 中国电力科学研究院有限公司 | It is a kind of to examine trouble unit of the GIL based on manual discharge for extra-high voltage electrified |
| CN110146838A (en) * | 2019-05-07 | 2019-08-20 | 广东电网有限责任公司 | A kind of built-in metal foil partial discharge sensor determines ginseng method |
| CN110146838B (en) * | 2019-05-07 | 2020-12-29 | 广东电网有限责任公司 | Parameter determination method for built-in metal foil partial discharge sensor |
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