CN205539326U - Direct current GIS's PD analogue means - Google Patents
Direct current GIS's PD analogue means Download PDFInfo
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- CN205539326U CN205539326U CN201620064549.1U CN201620064549U CN205539326U CN 205539326 U CN205539326 U CN 205539326U CN 201620064549 U CN201620064549 U CN 201620064549U CN 205539326 U CN205539326 U CN 205539326U
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Abstract
The application discloses direct current GIS's PD analogue means. The device including insulating defect model, place insulating defect model the gas discharge room, provide the direct current system of exerting pressure of adjustable DC voltage and detect partial discharge's the pulse voltage signal and the detecting system of UHF signal to the gas discharge room. Compared with the prior art, the utility model discloses can simulate direct current GIS's the PD condition, compensate current experiment platform and can only simulate the not enough of the PD condition that exchanges GIS, for direct current GIS's on -line monitoring and the aassessment of state of insulation provide the experiment basis, satisfy the demand that modern special high voltage direct current exported the engineering.
Description
Technical field
The application relates to the state of insulation on-line monitoring technique field of gas-insulated switchgear, more specifically
Say, relate to the PD analog of a kind of direct current GIS.
Background technology
SF6 gas has excellent insulation and arc extinction performance, can improve dielectric strength as dielectric,
It is greatly reduced the size of high pressure equipment, be widely used in GIS (Gas Insulated Switchgears,
Gas-insulated switchgear) in.But, GIS manufacturing, transport, install, overhaul and the process such as operation
In, the most various insulation defect in inside, thus cause device interior electric field to be distorted,
And then produce PD (Partial Discharge, shelf depreciation).When serious PD occurs, on the one hand, PD
The further destruction to device interior insulation can be accelerated, ultimately result in insulation fault and cause power outage；Separately
On the one hand, PD is again the characteristic quantity of Efficient Characterization insulation status, by detecting the PD of GIS and mould
Formula identification, can find the internal insulation defect existed of GIS and type to a great extent.Therefore, detection
PD is to ensureing that GIS safe and reliable operation has important practical significance, and colleague is devoted for years in the party both at home and abroad
To research.
Research for GIS PD on-line monitoring the most both at home and abroad is concentrated mainly on exchange, not yet extends to straight
Stream field, however as developing rapidly of modern extra-high voltage direct-current transmission engineering, direct current GIS will obtain more
More being widely applied, therefore, the PD research carrying out GIS under DC voltage is significant.
Utility model content
In view of this, the application provides the PD analog of a kind of direct current GIS, it is possible to analog DC GIS
PD situation under different insulative defect model, meets the demand of modern extra-high voltage direct-current output engineering.
To achieve these goals, it is proposed that scheme as follows:
A kind of PD analog of direct current GIS, including:
Insulation defect model；
Hold the gas discharge chamber of described insulation defect model；
It is connected with described gas discharge chamber, provides continuously adjustable unidirectional current to described gas discharge chamber two ends
The direct current compression system of pressure；
It is connected with described gas discharge chamber, obtains pulse voltage signal and the UHF letter of the PD of direct current GIS
Number detecting system.
Preferably, described direct current compression system includes: Regulation Control platform, experimental transformer, protective resistance,
Capacitive divider, high-voltage rectification silicon stack, filter capacitor, resitstance voltage divider and isolation resistance；
Wherein, described Regulation Control platform is connected with the primary side terminals of described experimental transformer；
Described protective resistance, described high-voltage rectification silicon stack, described isolation resistance and described gas discharge chamber
It is sequentially connected in series, and the free terminals of described protective resistance connect with the first of described experimental transformer secondary side
Line end is connected, and freely connect wires and the second of the described experimental transformer secondary side of described gas discharge chamber connect
Line end is connected；
The common port of described protective resistance and described high-voltage rectification silicon stack connects with the first of described capacitive divider
Line end is connected, and the second terminals of described capacitive divider connect with the second of described experimental transformer secondary side
Line end is even；
First wiring of described high-voltage rectification silicon stack and described isolation resistance and common port and described filter capacitor
End is connected, the second terminals of described filter capacitor and the second wiring of the secondary side of described experimental transformer
End is connected；
The common port of described filter capacitor and described isolation resistance and the first terminals of described resitstance voltage divider
It is connected, the second terminals of described resitstance voltage divider and the second wiring of the secondary side of described experimental transformer
End is connected.
Preferably, described insulation defect model includes: metallic projections part defect model, free metal are
Defect model, insulator metallic pollution defect model and/or insulator void defects model.
Preferably, described detecting system includes: pulse current detecting system and UHF signal detection system；
Wherein, described pulse current detecting system includes: coupling resistance, detection impedance and stored digital are shown
Ripple device；
First terminals of described coupling electric capacity are connected with the second terminals of described detection resistance, described coupling
Second terminals of resistance are connected with described gas discharge chamber, the second terminals ground connection of described detection resistance,
Described digital storage oscilloscope and described detection resistor coupled in parallel；
Described UHF signal detection system includes: gather described UHF signal type UHF sensor and with
The digital storage oscilloscope that described type UHF sensor is connected.
Preferably, gas discharge chamber includes:
It is provided with oval the rustless steel cylinder body of caping, high pressure guide rod, ground connection guide rod；
Wherein, described high pressure guide rod runs through described oval caping, and lower end and described insulation defect is upper
Electrode is connected, and described ground connection guide rod runs through the bottom of described rustless steel cylinder body, and upper end lacks with described insulation
The bottom electrode fallen into is connected；
It is respectively symmetrically on described rustless steel cylinder body four wall and the first stainless steel tube and the second stainless steel tube are set, with
And first quartz glass observation window and the second quartz glass observation window, described first quartz glass observation window and
It is provided with described type UHF sensor on institute's the second quartz glass observation window；
Sample introduction ball valve, the sample introduction being connected with described sample introduction ball valve is set gradually on described first stainless-steel pipe
Mouth, pressure vacuum gauge ball valve, the pressure vacuum gauge being connected with described pressure vacuum gauge ball valve, vacuum pump ball
Valve, the vacuum pump being connected with described vacuum pump ball valve；
Sampling ball valve and the thief hatch being connected with described sampling ball valve it is provided with on described second stainless steel tube.
Preferably, described gas discharge chamber also includes:
Fix described high pressure guide rod and high pressure loop bar and the flange of fixing described high pressure loop bar；
Described high pressure guide rod, described high pressure loop bar and described flange are disposable encapsulated moulding.
Preferably, described gas discharge chamber also includes: be arranged on the intracavity bottom of described rustless steel cylinder body,
Supports insulative of fixing described ground connection guide rod.
Preferably, described first quartz glass observation window and described second quartz glass observation window all pass through method
Blue and screw is fixed on the sidewall of described rustless steel cylinder body.
Preferably, described oval caping and described rustless steel cylinder body are connected by screw.
Through as shown from the above technical solution, this application discloses the PD analog of a kind of direct current GIS.Should
Device includes insulation defect model, the gas discharge chamber placing insulation defect model, carries to gas discharge chamber
The direct current compression system supplying adjustable dc voltage and the pulse voltage signal detecting shelf depreciation and UHF are believed
Number detecting system.Compared with prior art, this utility model can the PD situation of analog DC GIS,
Compensate for existing experiment porch can only the deficiency of PD situation of analog AC GIS, for direct current GIS
The assessment of line monitoring and state of insulation provides experiment basis, meets modern extra-high voltage direct-current output engineering
Demand.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that,
Accompanying drawing in describing below is only embodiment of the present utility model, comes for those of ordinary skill in the art
Say, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
Fig. 1 shows the schematic block circuit diagram of the PD analog of this utility model a kind of direct current GIS；
Fig. 2 shows the gas discharge chamber of the PD analog of a kind of direct current GIS disclosed in this utility model
Structural representation；
Fig. 3 shows the gas discharge chamber of the PD analog of a kind of direct current GIS disclosed in this utility model
Top view；
Fig. 4 shows the structural representation of four kinds of Exemplary insulative defect model disclosed in this utility model；
Fig. 5 shows the circuit diagram of a kind of pulse current method calibration circuit；
Fig. 6 shows the circuit diagram of this utility model a kind of UHF method calibration circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the technology in this utility model embodiment
Scheme is clearly and completely described, it is clear that described embodiment is only this utility model one
Divide embodiment rather than whole embodiments.Based on the embodiment in this utility model, this area is common
The every other embodiment that technical staff is obtained under not making creative work premise, broadly falls into this
The scope of utility model protection.
The PD analog of direct current GIS and experimental technique, this utility model mainly includes following content:
(1) direct current GIS PD analog platform is built；(2) under different insulative defect model, carry out PD experiment.
Specifically comprise the following steps that
(1) direct current GIS PD simulation is built flat
See the schematic block circuit diagram that Fig. 1 shows the PD analog of this utility model a kind of direct current GIS.
In the present embodiment, the PD analog of this direct current GID is mainly put by direct current compression system, gas
Electricity room, the insulation defect model that detecting system is different with four kinds are constituted.
Wherein, direct current compression system is divided by Regulation Control platform 1, experimental transformer 2, protective resistance 3, electric capacity
Depressor 4, high-voltage rectification silicon stack 5, filter capacitor 6, resitstance voltage divider 7 and isolation resistance 8 are constituted.Direct current
The outfan of compression system is connected with gas discharge chamber 9 by wire, it is possible to provide to gas discharge chamber two ends
0～50kV continuously adjustable DC voltage.
The physical circuit connected mode of this direct current compression system is:
Regulation Control platform 1 is connected with the primary side terminals of experimental transformer 2.The two of experimental transformer 2
The top of the first terminals of secondary side, protective resistance 2, high-voltage rectification silicon stack 5 and gas discharge chamber 9 connects
Line end is sequentially connected, and the bottom terminals of gas discharge chamber connect with the second of the secondary side of experimental transformer 2
Line end is connected.
First terminals phase of the common port of protective resistance 2 and high-voltage rectification silicon stack 5 and capacitive divider 4
Even, the second terminals of described capacitive divider 4 and the second wiring of described experimental transformer 2 secondary side
End is even.
The of described high-voltage rectification silicon stack 5 and described isolation resistance 8 and common port and described filter capacitor 6
One terminals are connected, the second terminals of described filter capacitor 6 and the secondary side of described experimental transformer 2
The second terminals be connected.
The common port of described filter capacitor 6 and described isolation resistance 8 and the first of described resitstance voltage divider 7
Terminals are connected, the second terminals of described resitstance voltage divider 7 and the secondary side of described experimental transformer 2
The second terminals be connected.
In the present embodiment, direct current compression system utilizes high voltage silicon rectifier stack to carry out rectification, recycles a filtering
Electric capacity plays flat ripple effect, it is provided that a ripple factor meets the kV level direct current experimental voltage of national standard,
Can the real work voltage of accurate simulation direct current GID.
Additionally this utility model discloses the structural representation of a kind of gas discharge chamber.See Fig. 2 and Fig. 3, Fig. 2
Show that disclosed in this utility model, the structure of the gas discharge chamber of the PD analog of a kind of direct current GIS is shown
Being intended to, Fig. 3 shows the gas discharge chamber of the PD analog of a kind of direct current GIS disclosed in this utility model
Top view.
This gas discharge chamber is mainly by rustless steel cylinder body 14, ellipsoidal head 15, bushing 16, high pressure
Guide rod 17, flange 18, screw 19, pressure vacuum gauge ball valve 20, pressure vacuum gauge 21, vacuum pump ball valve
22, vacuum pump 23, sample introduction ball valve 24 and injection port 25, spike 26, ground connection guide rod 27, insulation defect
28, sampling ball valve 29, thief hatch 30, supports insulative 31 and quartz glass observation window 32 are constituted.Described
Rustless steel cylinder body 14 is minimum to be born 5 atmospheric pressure and ensures sealing, and rustless steel cylinder body bottom connects 3～4
Individual spike 26, its top seal is dismountable ellipsoidal head 15, arranges one at top cap central
Aperture is the through hole of 20mm, and described high pressure guide rod 17, flange 18 are with politef bushing 16 once
Property encapsulated moulding is deep into cylinder interior from the through hole of top cover, and is fixed in described supports insulative 31
At the heart.Arranging an aperture at rustless steel cylinder body bottom center is the through hole of 15mm, and described ground connection is led
Bar 27 through this through hole and is fixed on described supports insulative 31 centers with the disposable encapsulated moulding of flange 18
Place.The ground connection guide rod end of cylinder interior and high pressure guide rod end all use helicitic texture and described insulation
Defect electrode 28 connects.It is respectively symmetrically in four sidewall centers of rustless steel cylinder body and two apertures are set are
The through hole of 15mm and two a diameter of 80mm, thickness are 15mm quartz glass observation window 32, two through holes
Connect two stainless steel tubes respectively, wherein on a stainless steel tube, connect pressure vacuum gauge ball valve 20, air inlet
Ball valve 24, vacuum pump ball valve 22, another root stainless steel tube connects sampling ball valve 29；Quartz glass dress is seen
Examine window 32 between abutted flange, use " O " shape rubber seal and be 15mm with 10 screw diameters
Screw 19 be fixed.
Optionally, also disclose four kinds of Exemplary insulative defect model in the present embodiment, see Fig. 4 and show
The structural representation of four kinds of Exemplary insulative defect model disclosed in this utility model.
Four kinds of described Exemplary insulative defect model include metallic projections defect model (Fig. 4 (a)), freedom
Metal particle defect model (Fig. 4 (b)), insulator metallic pollution defect model (Fig. 4 (c)) and insulation
Edema of the legs during pregnancy gap defect model (Fig. 4 (d)).Described metallic projections model uses needle to board electrode to simulate,
The wherein a diameter of 4mm of needle electrode, a length of 30mm, a length of 5mm of tip portion, tip curvature half
Footpath is 0.3mm, and a diameter of 120mm of plate electrode, thickness are 10mm.Described free metal corpuscular model
Use ball-bowl electrode and be positioned over the copper scale of hemispherical bowl electrode base and simulate, wherein ball electrode diameter
For 30mm, bowl electrode external diameter is 120mm, thickness is 2mm, and copper scale size is 10～100 μm.Institute
The insulator metallic pollution model use board-to-board electrode stated and the surface being clipped between board-to-board electrode are stained with
The cylindrical ring epoxy resins of copper scale is simulated, and wherein a diameter of 120mm of plate electrode, thickness are 10mm, circle
The a diameter of 60mm of cylindricality epoxy resin, height are 21mm, are stained with the long 18mm in region of copper scale, wide 2mm,
Copper scale diameter is about 10～100 μm.Described insulator air gap model use board-to-board electrode and be clipped in plate-
Cylindrical ring epoxy resins between plate electrode carrys out mould with annular epoxy sheet (being connected with hardboard electrode)
Intending, wherein a diameter of 120mm of plate electrode, thickness are 10mm, a diameter of 60mm of cylindrical ring epoxy resins,
Being highly 20mm, annular epoxy sheet thickness is 1mm, outer annular diameter is 60mm, annular diameters is
50mm。
Described detecting system includes pulse current detecting system and UHF detecting system two parts.Wherein arteries and veins
Rush current detecting system, mainly include coupling electric capacity 11, detection impedance 12 and digital storage oscilloscope 13；
The connection circuit of UHF detecting system as shown in Figure 6, is mainly shown by type UHF sensor 10 and stored digital
Ripple device 13 is constituted, it is possible to the information such as UHF pulse amplitude, repetitive rate and phase place of detecting PD.
(2) under different insulative defect model, carry out PD experiment
1. each experimental provision is connected according to experimental circuit schematic diagram shown in Fig. 1, it is ensured that all experimental facilitiess
Good earth.Open the ellipsoidal head 15 of described rustless steel cylinder body 14, with ethanol purge inboard wall of cylinder block and
After artificial defect model 28, top cover is installed, it is ensured that the seal of cylinder body.
2. open described vacuum pump ball valve 22, start vacuum pump 23, after rustless steel cylinder body evacuation
Close vacuum pump ball valve and vacuum pump successively.Open described SF6 gas cylinder valve and sample introduction ball the most successively
Valve 29, close successively after being filled with the pure SF6 gas of 0.2～0.3MPa in cylinder body SF6 gas cylinder valve and
Air inlet ball valve.By described operating procedure, first evacuation, it is re-filled with SF6 purge of gas, so repeats
Repeatedly rinse rustless steel cylinder body, it is ensured that the content of cylinder internal water and oxygen be respectively smaller than 500ppm and
Evacuation again after 2000ppm.
3. open described SF6 gas cylinder valve and air inlet ball valve, be filled with in rustless steel cylinder body
The pure SF6 gas of 0.3～0.5MPa, closes SF6 gas cylinder valve and air inlet ball valve the most successively, stable
A few hours, make the diffusion of SF6 gas uniformly.
4. toward before installing artificial insulation defect in rustless steel cylinder body, the Regulation Control platform 1 described in regulation delays
Slowly raise experimental voltage, detect device intrinsic firing potential Ug.Finish to gas discharge chamber 9 pressurization
After experiment, need to slowly regulate Regulation Control platform and experimental voltage is reduced to 0, close experimental power supply, then use
Earth rod just can enter Experimental Area after effectively discharging the high-pressure side of all devices, the most not
Repeat again.
5. by rustless steel cylinder body evacuation, open described air inlet ball valve and admit air into cylinder body, it is ensured that cylinder
Inside and outside pressure is consistent, closes air inlet ball valve.Open the ellipsoidal head of rustless steel cylinder body, described
After installing defect model between high pressure guide rod 17 and ground connection guide rod 27, top cover is installed, it is ensured that cylinder body
Seal.2.～3. repeating step, the Regulation Control platform described in regulation slowly raises experimental voltage, and detection lacks
Fall into firing potential Ust and breakdown voltage Ub of model.
6. averagely take between Ust and min (Ug, Ub) 5 electric pressures U1, U2, U3, U4,
U5 (i.e. difference between Ust, U1, U2, U3, U4, U5, min (Ug, Ub) neighboring voltage
Equal), 2.～3. repeat step, the Regulation Control platform described in regulation slowly raise experimental voltage to U1,
U2, U3, U4, U5, be carried out continuously the PD experiment of 8 hours, often under each electric pressure respectively
A UHF PD signal, each continuous acquisition 1 minute is gathered every 2 hours.
7. pulse current method detection PD amount is utilized
This detection method uses multiple process as shown in Figure 5 to measure loop and measures PD pulsed current signal.
See Fig. 5 and show the circuit diagram of a kind of pulse current method calibration circuit.First to described gas discharge
The PD that in room 9, different insulative defect model 28 produces carries out quantitatively calibrating respectively: according to IEC 60270
Standard understands, and the pulse voltage amplitude U that pulse current method records is linear with Apparent discharge magnitude Q,
By in parallel with gas discharge chamber for shelf depreciation prover 33, produce discharge capacity at insulation defect electrode two ends
The pulse signal known, can record the arteries and veins at detection impedance 12 two ends by described digital storage oscilloscope 13
Rush voltage peak, such that it is able to the linear relationship obtained between crest value of impulse voltage and Apparent discharge magnitude.?
Implement in continuous P D experimentation, utilize digital storage oscilloscope to measure the pulse voltage at detection impedance two ends
Peak value U, the linear relationship between the crest value of impulse voltage obtained according to quantitatively calibrating and Apparent discharge magnitude,
The PD Apparent discharge magnitude Q of reality can be calculated.
8. UHF method is utilized to detect PD signal
See Fig. 6 and show the circuit diagram of this utility model a kind of UHF method calibration circuit.Described in utilization
Digital storage oscilloscope 13 gathers UHF signal, each continuous acquisition 1 minute, can obtain PD's
The information such as UHF pulse amplitude, repetitive rate and phase place.First to different insulative in described gas discharge chamber 9
The UHF PD signal that defect model 28 produces is corrected: first, determine transmitting by laboratory experiment
The parameter (rise time, half time to peak, pulse amplitude etc.) of the artificial pulse of UHF signal.Then,
Regulation Control platform 1 described in regulation, to gas discharge chamber's two ends pressurization, makes the insulation defect of inside that PD to occur,
At quartz observing window 31, detect, by UHF method, the UHF signal A that this defect PD excites (use pulse energy
Amount or amplitude represent).Subsequently, utilizing signal generator 34 to inject amplitude to gas discharge chamber two ends can
The artificial pulse of UHF signal adjusted, detection UHF signal B now at quartz observing window.Finally,
Utilize the relevant parameter of signal generator regulation injected pulse, make the deviation of UHF signal B Yu A ±
Within 10%, it is believed that the artificial pulse signal of UHF now injected is the equivalent source signal of PD.
The utility model proposes a kind of multistage Gaussian function reference waveform as injected pulse, with multistage height
The rise time of this function, fall time, Gauss exponent number are regulation parameter, and its function expression is as follows:
In formula, ai represents the height of crest, and bi represents the value of the abscissa x of crest position, and ci is anti-
Reflect the steepness of crest.
After this utility model uses technique scheme, mainly have the following effects:
1, the PD situation of the experiment porch energy analog DC GIS in this utility model, compensate for existing reality
Test platform can only the deficiency of PD situation of analog AC GIS, be the base of direct current GIS fault diagnosis research
Plinth.
2, the direct current compression system in this utility model utilizes high voltage silicon rectifier stack to carry out rectification, re-uses a filter
Ripple electric capacity plays flat ripple effect, it is provided that a ripple factor meets the kV level direct current experiment height of national standard
Pressure, it is possible to the real work voltage of accurate simulation direct current GIS.
3, this utility model have developed four kinds of typical insulation defect models, covers in actual DC GIS
Common metallic projections, free metal microgranule, insulator surface pollute, insulator air gap four kinds insulation
Defect, simulation is reasonable and accurate.
4, the experiment porch in this utility model use helicitic texture connect the indoor conducting rod of gas discharge and
Insulation defect model electrode, it is possible to the distance between regulation high-field electrode and ground electrode, it is simple to research UHF
Relation between PD signal and strength of discharge.
5, this utility model uses UHF method detection PD signal, and proposes a kind of multistage Gaussian function conduct
The reference waveform of injected pulse, can detect the information such as the pulse amplitude of PD, repetitive rate and phase place, detection
Highly sensitive, capacity of resisting disturbance is strong, detection directly, may be implemented in line monitoring and fault location.
6, the experiment porch simple in construction in this utility model, low cost, experimentation and detection means letter
Singly, easily grasp.
Finally, in addition it is also necessary to explanation, in this article, the relational terms of such as first and second or the like
It is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires
Or imply relation or the order that there is any this reality between these entities or operation.And, art
Language " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, thus
Make to include that the process of a series of key element, method, article or equipment not only include those key elements, and
Also include other key elements being not expressly set out, or also include for this process, method, article or
The key element that person's equipment is intrinsic.In the case of there is no more restriction, by statement " including ... "
The key element limited, it is not excluded that also deposit in including the process of described key element, method, article or equipment
In other identical element.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment stresses
Being the difference with other embodiments, between each embodiment, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
This utility model.Multiple amendment to these embodiments will be aobvious for those skilled in the art
And be clear to, generic principles defined herein can be without departing from spirit or scope of the present utility model
In the case of, realize in other embodiments.Therefore, this utility model is not intended to be limited to institute herein
These embodiments shown, and it is to fit to consistent with principles disclosed herein and features of novelty the widest
Scope.
Claims (9)
1. the PD analog of a direct current GIS, it is characterised in that including:
Insulation defect model；
Hold the gas discharge chamber of described insulation defect model；
It is connected with described gas discharge chamber, provides continuously adjustable unidirectional current to described gas discharge chamber two ends
The direct current compression system of pressure；
It is connected with described gas discharge chamber, obtains pulse voltage signal and the UHF letter of the PD of direct current GIS
Number detecting system.
Device the most according to claim 1, it is characterised in that described direct current compression system includes:
Regulation Control platform, experimental transformer, protective resistance, capacitive divider, high-voltage rectification silicon stack, filtered electrical
Appearance, resitstance voltage divider and isolation resistance；
Wherein, described Regulation Control platform is connected with the primary side terminals of described experimental transformer；
Described protective resistance, described high-voltage rectification silicon stack, described isolation resistance and described gas discharge chamber
It is sequentially connected in series, and the free terminals of described protective resistance connect with the first of described experimental transformer secondary side
Line end is connected, and freely connect wires and the second of the described experimental transformer secondary side of described gas discharge chamber connect
Line end is connected；
The common port of described protective resistance and described high-voltage rectification silicon stack connects with the first of described capacitive divider
Line end is connected, and the second terminals of described capacitive divider connect with the second of described experimental transformer secondary side
Line end is even；
First wiring of described high-voltage rectification silicon stack and described isolation resistance and common port and described filter capacitor
End is connected, the second terminals of described filter capacitor and the second wiring of the secondary side of described experimental transformer
End is connected；
The common port of described filter capacitor and described isolation resistance and the first terminals of described resitstance voltage divider
It is connected, the second terminals of described resitstance voltage divider and the second wiring of the secondary side of described experimental transformer
End is connected.
Device the most according to claim 1, it is characterised in that described insulation defect model includes:
Metallic projections part defect model, free metal are for defect model, insulator metallic pollution defect model
And/or insulator void defects model.
Device the most according to claim 1, it is characterised in that described detecting system includes: pulse
Current detecting system and UHF signal detection system；
Wherein, described pulse current detecting system includes: coupling resistance, detection impedance and stored digital are shown
Ripple device；
First terminals of described coupling electric capacity are connected with the second terminals of described detection resistance, described coupling
Second terminals of resistance are connected with described gas discharge chamber, the second terminals ground connection of described detection resistance,
Described digital storage oscilloscope and described detection resistor coupled in parallel；
Described UHF signal detection system includes: gather described UHF signal type UHF sensor and with
The digital storage oscilloscope that described type UHF sensor is connected.
Device the most according to claim 4, it is characterised in that gas discharge chamber includes:
It is provided with oval the rustless steel cylinder body of caping, high pressure guide rod, ground connection guide rod；
Wherein, described high pressure guide rod runs through described oval caping, and lower end and described insulation defect is upper
Electrode is connected, and described ground connection guide rod runs through the bottom of described rustless steel cylinder body, and upper end lacks with described insulation
The bottom electrode fallen into is connected；
It is respectively symmetrically on described rustless steel cylinder body four wall and the first stainless steel tube and the second stainless steel tube are set, with
And first quartz glass observation window and the second quartz glass observation window, described first quartz glass observation window and
It is provided with described type UHF sensor on institute's the second quartz glass observation window；
Sample introduction ball valve, the sample introduction being connected with described sample introduction ball valve is set gradually on described first stainless-steel pipe
Mouth, pressure vacuum gauge ball valve, the pressure vacuum gauge being connected with described pressure vacuum gauge ball valve, vacuum pump ball
Valve, the vacuum pump being connected with described vacuum pump ball valve；
Sampling ball valve and the thief hatch being connected with described sampling ball valve it is provided with on described second stainless steel tube.
Device the most according to claim 5, it is characterised in that described gas discharge chamber also includes:
Fix described high pressure guide rod and high pressure loop bar and the flange of fixing described high pressure loop bar；
Described high pressure guide rod, described high pressure loop bar and described flange are disposable encapsulated moulding.
7. according to the device described in claim 5 or 6, it is characterised in that described gas discharge chamber also wraps
Include: be arranged on the intracavity bottom of described rustless steel cylinder body, supports insulative of fixing described ground connection guide rod.
Device the most according to claim 7, it is characterised in that described first quartz glass observation window
With the sidewall that described second quartz glass observation window is all fixed on described rustless steel cylinder body by flange and screw
On.
Device the most according to claim 7, it is characterised in that described oval caping and described not
Rust steel cylinder body is connected by screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620064549.1U CN205539326U (en) | 2016-01-22 | 2016-01-22 | Direct current GIS's PD analogue means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620064549.1U CN205539326U (en) | 2016-01-22 | 2016-01-22 | Direct current GIS's PD analogue means |
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|---|---|
| CN205539326U true CN205539326U (en) | 2016-08-31 |
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| CN201620064549.1U Active CN205539326U (en) | 2016-01-22 | 2016-01-22 | Direct current GIS's PD analogue means |
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| CN (1) | CN205539326U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490319A (en) * | 2018-03-21 | 2018-09-04 | 广东电网有限责任公司电力科学研究院 | A kind of GIS defects of insulator model and test SF6The method of decomposition product |
| CN112924820A (en) * | 2021-01-22 | 2021-06-08 | 国网山东省电力公司济南供电公司 | Visual analogue means of GIS full kind of internal defect |
-
2016
- 2016-01-22 CN CN201620064549.1U patent/CN205539326U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490319A (en) * | 2018-03-21 | 2018-09-04 | 广东电网有限责任公司电力科学研究院 | A kind of GIS defects of insulator model and test SF6The method of decomposition product |
| CN112924820A (en) * | 2021-01-22 | 2021-06-08 | 国网山东省电力公司济南供电公司 | Visual analogue means of GIS full kind of internal defect |
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