CN206584004U - The influence experimental provision that a kind of different metal material is decomposed to SF6 direct currents PD - Google Patents
The influence experimental provision that a kind of different metal material is decomposed to SF6 direct currents PD Download PDFInfo
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- CN206584004U CN206584004U CN201720245995.7U CN201720245995U CN206584004U CN 206584004 U CN206584004 U CN 206584004U CN 201720245995 U CN201720245995 U CN 201720245995U CN 206584004 U CN206584004 U CN 206584004U
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Abstract
The utility model embodiment discloses the influence experimental provision that a kind of different metal material is decomposed to SF6 direct currents PD, solve and rarely have the research under DC condition and different metal material to the SF6 gases PD influences decomposed for the research that gas insulated electric apparatus is monitored on-line in the prior art, it is impossible to differentiate different metal material to the influencing characterisitic of SF6 positive polarity direct current PD decomposable processes and the technical problem of mechanism of action.The utility model embodiment includes：Direct current compression system, SF6 electric discharges air chamber, detecting system and metallic projections defect model; direct current compression system include pressure regulation become present a theatrical performance as the last item on a programme, the halo-free experimental transformer of high pressure, high-voltage rectification silicon stack, filter capacitor, voltage-dividing capacitor and protective resistance; detecting system includes coupled capacitor, 50 Ω noninductive resistances, high speed digital oscilloscope and gas chromatography-mass spectrometry, and metallic projections defect model includes pure aluminum metal protrusion defect model, brass wire protrusion defect model, 18/8 stainless steel metal protrusion defect model.
Description
Technical field
The utility model is related to insulated on-line monitoring and the diagnostic techniques field of outlet openings insulator arrangement, more particularly to one
Plant the influence experimental provision that different metal material is decomposed to SF6 direct currents PD.
Background technology
Gas insulated combined electrical equipment (Gas Insulated Switchgear, GIS) refers to use six in whole or in part
Sulfur fluoride (SF6) gas is as the metal-enclosed type equipment of dielectric, and it has compact conformation, and area occupied is smaller, reliably
Property it is high, maintenance workload is smaller, and in-site installation is convenient, and electromagnetic radiation is small, the advantages of strong environmental adaptability, at home and abroad obtains
Substantial amounts of application.As GIS is using more and more extensive, voltage class also more and more higher, its importance in power system
Become increasingly conspicuous, GIS, which breaks down, huge threat is constituted to power system security, have a strong impact on the continuity and stably of power supply
Property, gently then cause economic loss, heavy then cause large-area power-cuts, harm social stability and safety, it is therefore necessary to the operation to GIS
Situation is paid much attention to, and GIS failure odds is reduced as far as possible.
However, SF6 gas insulated electric apparatus occurs that some are exhausted with can not avoiding in manufacture, assembling and running
Edge defect, these insulation defects can be gradually degraded in During Process of Long-term Operation, and device interior can be caused when reaching to a certain degree
Generation shelf depreciation (Partial Discharge, PD), under PD effects, SF6 gases can decompose, the first fraction of generation
Solution product can with the impurity such as the micro-air and moisture that wherein unavoidably contain, react generation as SO2F2, SOF2,
The products such as CF4, SO2, SOF4, HF, CH4, CO2 and SF4.These products can be further exacerbated by the deterioration of insulation defect, so that
Making the integral insulation performance of equipment reduces, and jeopardizes the safe operation of equipment.Therefore, the early stage for differentiating gas insulated electric apparatus is exhausted
Edge situation is very necessary to carrying out effective GIS on-line monitoring and fault diagonosings.
Research both at home and abroad in the case where the research that gas insulated electric apparatus is monitored on-line rarely has DC condition at present, and only have
On studying the influence for also seldom focusing on that metal material is decomposed to SF6 gases PD under DC condition, be only capable of obtaining gas exhausted
The experimental data such as the decomposition components of SF6 gases under a variety of insulation defects under edge electrical equipment DC condition, it is impossible to carry out different
Metal decomposes the research of influence on SF6 direct currents PD.However, equipment air chamber part uses various metals material members, in PD effects
Under, the F atom that SF6 is decomposed can react with various metals, generation metal fluoride or metal sulfide, and different metal
Physical property and chemical property between also have larger difference, the formation of electrode material and analyte has direct pass
System.Therefore, influencing characterisitic and mechanism of action of the different metal material to SF6 positive polarity direct current PD decomposable processes are only differentiated,
Corresponding fault diagnosis practical technique can be set up.
Utility model content
The utility model embodiment discloses the influence experimental provision that a kind of different metal material is decomposed to SF6 direct currents PD,
Solve and rarely have DC condition and different metal material for the research that gas insulated electric apparatus is monitored on-line in the prior art
To the research of the SF6 gases PD influences decomposed under material, it is impossible to differentiate different metal material to SF6 positive polarity direct current PD decomposable processes
Influencing characterisitic and mechanism of action technical problem.
The utility model embodiment provides the influence experimental provision that a kind of different metal material is decomposed to SF6 direct currents PD,
Including：
Direct current compression system, SF6 electric discharges air chamber, detecting system and metallic projections defect model；
Direct current compression system by pressure regulation become present a theatrical performance as the last item on a programme, the halo-free experimental transformer of high pressure, high-voltage rectification silicon stack, filter capacitor, point
Piezoelectric capsule and protective resistance composition；Pressure regulation becomes the input connection 380kV/50Hz civil powers presented a theatrical performance as the last item on a programme, and pressure regulation becomes the output presented a theatrical performance as the last item on a programme
The input of the end connection halo-free experimental transformer of high pressure, the output end of the halo-free experimental transformer of high pressure is being connected in series with protection electricity
After resistance, the voltage-dividing capacitor for real-time monitoring voltage value is connected in parallel to；One end of voltage-dividing capacitor is also associated with high pressure
The input of rectification silicon stack, the output end of high-voltage rectification silicon stack is connected in parallel to filter capacitor, can put on SF6 for obtaining and puts
Continual and steady adjustable DC voltage of electric panel room；
SF6 electric discharge air chambers are connected with the output end of direct current compression system, for placing metallic projections defect model, are gone forward side by side
Row positive polarity direct current PD is tested；SF6 electric discharge air chambers include high pressure SF6/ casing airs, air chamber capping, air chamber cavity, metal protrusion
Thing defect model, thief hatch ball valve, thief hatch, vavuum pump, grounded metal bar, corner metallic support, injection port ball valve, sample introduction
Mouth, vavuum pump, vacuum pump ball-valve, pressure gauge needle-valve, pressure gauge, O-ring seal, threaded spindle cap nut, quartz observing window and ground connection are led
Electric pole；SF6 electric discharge air chambers are spheroid shape, and are supported by corner metallic support；Air chamber is covered and air chamber body uses 202
Steel material is made, and is sealed by O-ring seal and threaded spindle cap nut；
Detecting system includes coupled capacitor, 50 Ω noninductive resistances, high speed digital oscilloscope and gas chromatography-mass spectrometry.
Coupled capacitor and 50 Ω noninductive resistances are connected in parallel in the output end of direct current compression system, and 50 Ω noninductive resistances pass through cable and height
Speed digital oscillograph is connected, and corresponding PD signals are recorded for obtaining and storing when carrying out the experiment of PD direct currents；Gas-chromatography matter
Spectrum combined instrument is connected by PTFE flexible pipes with the thief hatch of SF6 electric discharge air chambers, for analyzing and obtaining sample gas component；
Metallic projections defect model include pure aluminum metal protrusion defect model, brass wire protrusion defect model,
18/8 stainless steel metal protrusion defect model.
Alternatively, metallic projections defect model is pin-plate profile structure, the pin electrode needle point of metallic projections defect model
Radius of curvature is 0.3mm, and the point angle of metallic projections defect model is 30 °, and pin electrode passes through internal thread hole and high pressure SF6/
Casing air is fixedly connected；The ground electrode of metallic projections defect model is circle, a diameter of 120mm, the ground electrode of ground electrode
Thickness be 10mm, ground electrode by internal thread hole be grounded conducting rod be fixedly connected.
Alternatively, ground connection conducting rod is connected by grounded metal bar with the earth, between grounded metal bar and ground connection conducting rod
It is attached by elevating screw thread.
As can be seen from the above technical solutions, the utility model embodiment has advantages below：
The utility model embodiment provides the influence experimental provision that a kind of different metal material is decomposed to SF6 direct currents PD,
Including：Direct current compression system, SF6 electric discharges air chamber, detecting system and metallic projections defect model, direct current compression system include adjusting
Buckling is presented a theatrical performance as the last item on a programme, the halo-free experimental transformer of high pressure, high-voltage rectification silicon stack, filter capacitor, voltage-dividing capacitor and protective resistance, detection system
System includes coupled capacitor, 50 Ω noninductive resistances, high speed digital oscilloscope and gas chromatography-mass spectrometry, metallic projections defect
Model includes pure aluminum metal protrusion defect model, brass wire protrusion defect model, 18/8 stainless steel metal protrusion and lacked
Fall into model.The influence experimental provision that a kind of different metal material provided in the present embodiment is decomposed to SF6 direct currents PD can be in experiment
Under the metallic projections defect model that various different metal materials are constituted in gas insulated electric apparatus under the conditions of the analog DC of room
PD, obtain influence of the different metal material to characteristic quantities such as decomposed gas component and its contents, be it is DC gas insulated electrically
The on-line monitoring and Condition assessment of insulation of equipment further lay solid experiment basis, solve in the prior art for gas
The research of insulation electrical equipment on-line monitoring rarely has the influence decomposed under DC condition and different metal material to SF6 gases PD
Research, it is impossible to differentiate different metal material to the influencing characterisitic of SF6 positive polarity direct current PD decomposable processes and the skill of mechanism of action
Art problem.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, before creative labor is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the influence reality that a kind of different metal material for providing is decomposed to SF6 direct currents PD in the utility model embodiment
The experimental circuit theory diagram of experiment device；
Fig. 2 is a kind of structural representation of SF6 electric discharge air chambers provided in the utility model embodiment；
Fig. 3 is a kind of top view of SF6 electric discharge air chambers provided in the utility model embodiment；
Fig. 4 is the structural representation of the metallic projections defect model provided in the utility model embodiment；
Fig. 5 is the influence reality that a kind of different metal material for providing is decomposed to SF6 direct currents PD in the utility model embodiment
The CF of experiment device detection4The change curve of content；
Fig. 6 is the influence reality that a kind of different metal material for providing is decomposed to SF6 direct currents PD in the utility model embodiment
The CO of experiment device detection2The change curve of content；
Fig. 7 is the influence reality that a kind of different metal material for providing is decomposed to SF6 direct currents PD in the utility model embodiment
The SOF of experiment device detection2The change curve of content；
Fig. 8 is the influence reality that a kind of different metal material for providing is decomposed to SF6 direct currents PD in the utility model embodiment
The SO of experiment device detection2F2The change curve of content；
Fig. 9 is the influence reality that a kind of different metal material for providing is decomposed to SF6 direct currents PD in the utility model embodiment
The SO of experiment device detection2The change curve of content.
Illustrate, 1. pressure regulation, which become, presents a theatrical performance as the last item on a programme, the halo-free experimental transformer of 2. high pressures, 3. protective resistances, 4. voltage-dividing capacitors, 5.
High-voltage rectification silicon stack, 6. filter capacitors, 7. coupled capacitors, 8.50 Ω noninductive resistances, 9. high speed digital oscilloscopes, 10.SF6 electric discharges
Air chamber, 11. gas chromatography-mass spectrometries, 12. high pressure SF6/ casing airs, the capping of 13. air chambers, 14. air chamber cavitys, 15. gold medals
Belong to protrusion defect model, 16. thief hatch ball valves, 17. thief hatch, 18. vavuum pumps, 19. grounded metal bars, 20. 4 jiaos of metals
Support, 21. injection port ball valves, 22. injection ports, 23. vavuum pumps, 24. vacuum pump ball-valves, 25. pressure gauge needle-valves, 26. pressure gauges,
27.O type sealing rings, 28. threaded spindle cap nuts, 29. quartz observing windows, 30. ground connection conducting rods, 31. pin electrodes, 32. ground electrodes.
Embodiment
The utility model embodiment discloses the influence experimental provision that a kind of different metal material is decomposed to SF6 direct currents PD,
Solve and rarely have DC condition and different metal material for the research that gas insulated electric apparatus is monitored on-line in the prior art
To the research of the SF6 gases PD influences decomposed under material, it is impossible to differentiate different metal material to SF6 positive polarity direct current PD decomposable processes
Influencing characterisitic and mechanism of action technical problem.
Referring to Fig. 1, the shadow that a kind of different metal material provided in the utility model embodiment is decomposed to SF6 direct currents PD
Ringing one embodiment of experimental provision includes：
Direct current compression system, SF6 electric discharges air chamber, detecting system and metallic projections defect model；
Direct current compression system becomes the present a theatrical performance as the last item on a programme halo-free experimental transformer 2 of 1, high pressure, high-voltage rectification silicon stack 5, filter capacitor by pressure regulation
6th, voltage-dividing capacitor 4 and protective resistance 3 are constituted；Pressure regulation become present a theatrical performance as the last item on a programme 1 input connection 380kV/50Hz civil powers, pressure regulation become presents a theatrical performance as the last item on a programme
1 output end connects the input of the halo-free experimental transformer 2 of high pressure, and the output end of the halo-free experimental transformer 2 of high pressure connects in series connection
It is connected to after protective resistance 3, is connected in parallel to the voltage-dividing capacitor 4 for real-time monitoring voltage value；One end of voltage-dividing capacitor 4
The input of high-voltage rectification silicon stack 5 is also associated with, the output end of high-voltage rectification silicon stack 5 is connected in parallel to filter capacitor 6, for obtaining
Continual and steady adjustable DC voltage of SF6 electric discharge air chambers can be put on by obtaining；
Fig. 2 and Fig. 3 are referred to, SF6 electric discharge air chambers 10 are connected with the output end of direct current compression system, dashed forward for placing metal
Go out thing defect model, and carry out positive polarity direct current PD experiments；SF6 electric discharge air chambers 10 include high pressure SF6/ casing airs 12, air chamber
Capping 13, air chamber cavity 14, metallic projections defect model 15, thief hatch ball valve 16, thief hatch 17, vavuum pump 18, ground connection gold
Belong to bar 19, corner metallic support 20, injection port ball valve 21, injection port 22, vavuum pump 23, vacuum pump ball-valve 24, pressure gauge needle-valve
25th, pressure gauge 26, O-ring seal 27, threaded spindle cap nut 28, quartz observing window 29 and ground connection conducting rod 30；SF6 electric discharge air chambers are ellipse
Ball-type, and supported by corner metallic support 20；Air chamber capping 13 and air chamber body 14 are made of 202 Steel materials, and
Sealed by O-ring seal 27 and threaded spindle cap nut 28；
Detecting system includes coupled capacitor 7,50 Ω noninductive resistances 8, high speed digital oscilloscope 9 and gas chromatography combined with mass spectrometry
Instrument 11.The Ω noninductive resistances 8 of coupled capacitor 7 and 50 are connected in parallel in the output end of direct current compression system, and 50 Ω noninductive resistances 8 pass through
Cable is connected with high speed digital oscilloscope 9, and corresponding PD signals are recorded for obtaining and storing when carrying out the experiment of PD direct currents；Gas
Phase chromatograph-mass spectrometer 11 is connected by PTFE flexible pipes with the thief hatch of SF6 electric discharge air chambers 10, for analyzing and obtaining sample gas
Component；
Protruded referring to Fig. 4, metallic projections defect model 15 includes pure aluminum metal protrusion defect model, brass wire
Thing defect model, 18/8 stainless steel metal protrusion defect model.
Further, metallic projections defect model 15 is pin-plate profile structure, the pin electricity of metallic projections defect model 15
The needle point radius of curvature of pole 31 is 0.3mm, and the point angle of metallic projections defect model 15 is 30 °, and total length is 65mm, pin electrode
31 are fixedly connected by internal thread hole with high pressure SF6/ casing airs 12；The ground electrode 32 of metallic projections defect model 15 is circle
Shape, a diameter of 120mm of ground electrode 32, the thickness of ground electrode 32 are 10mm, and ground electrode 32 is conductive with ground connection by internal thread hole
Bar 30 is fixedly connected.Pin-plate spacing is adjusted by the elevating screw thread between grounded metal bar and ground connection conducting rod 30, is made
Pin-plate spacing is 3.3mm.
Further, ground connection conducting rod 30 is connected by grounded metal bar with the earth, grounded metal bar and ground connection conducting rod
It is attached between 30 by elevating screw thread.
Fig. 5~Fig. 9 is referred to, the different metal material that respectively the utility model embodiment is provided divides SF6 direct currents PD
Corresponding the detected CF of influence experimental provision of solution4Change curve, the CO of content2Change curve, the SOF of content2Content
Change curve, SO2F2Change curve, the SO of content2The change curve of content.
The influence experimental provision decomposed above to a kind of different metal material provided by the utility model to SF6 direct currents PD
It is described in detail, for those of ordinary skill in the art, according to the thought of the utility model embodiment, in specific implementation
It will change in mode and application, in summary, this specification content should not be construed as to of the present utility model
Limitation.
Claims (3)
1. the influence experimental provision that a kind of different metal material is decomposed to SF6 direct currents PD, it is characterised in that including：
Direct current compression system, SF6 electric discharges air chamber, detecting system and metallic projections defect model；
The direct current compression system by pressure regulation become present a theatrical performance as the last item on a programme, the halo-free experimental transformer of high pressure, high-voltage rectification silicon stack, filter capacitor, point
Piezoelectric capsule and protective resistance composition；The pressure regulation becomes the input connection 380kV/50Hz civil powers presented a theatrical performance as the last item on a programme, the pressure regulation transformation
The output end of platform connects the input of the halo-free experimental transformer of high pressure, and the output end of the halo-free experimental transformer of high pressure exists
It is connected in series with after the protective resistance, is connected in parallel to the voltage-dividing capacitor for real-time monitoring voltage value；It is described
One end of voltage-dividing capacitor is also associated with the input of the high-voltage rectification silicon stack, and the output end of the high-voltage rectification silicon stack is in parallel
The filter capacitor is connected with, continual and steady adjustable DC voltage of the SF6 electric discharges air chamber can be put on for obtaining；
The SF6 electric discharges air chamber is connected with the output end of the direct current compression system, for placing the metallic projections defect
Model, and carry out positive polarity direct current PD experiments；The SF6 electric discharges air chamber includes high pressure SF6/ casing airs, air chamber capping, air chamber
Cavity, metallic projections defect model, thief hatch ball valve, thief hatch, vavuum pump, grounded metal bar, corner metallic support, sample introduction
Mouth ball valve, injection port, vavuum pump, vacuum pump ball-valve, pressure gauge needle-valve, pressure gauge, O-ring seal, threaded spindle cap nut, quartz observing
Window and ground connection conducting rod；The SF6 electric discharges air chamber is spheroid shape, and is supported by corner metallic support；The air chamber envelope
Lid and the air chamber cavity are made of 202 Steel materials, and are sealed by the O-ring seal and the threaded spindle cap nut；
The detecting system includes coupled capacitor, 50 Ω noninductive resistances, high speed digital oscilloscope and gas chromatography-mass spectrometry；
The coupled capacitor and the 50 Ω noninductive resistances are connected in parallel in the output end of the direct current compression system, and 50 Ω is noninductive
Resistance is connected by cable with the high speed digital oscilloscope, for obtaining and storing record corresponding when carrying out the experiment of PD direct currents
PD signals；Gas chromatography-mass spectrometry is connected by PTFE flexible pipes with the thief hatch of SF6 electric discharge air chambers, for analyzing
And obtain sample gas component；
The metallic projections defect model include pure aluminum metal protrusion defect model, brass wire protrusion defect model,
18/8 stainless steel metal protrusion defect model.
2. the influence experimental provision that different metal material according to claim 1 is decomposed to SF6 direct currents PD, its feature exists
In the metallic projections defect model is pin-plate profile structure, the pin electrode needle point curvature of the metallic projections defect model
Radius is 0.3mm, and the point angle of the metallic projections defect model is 30 °, the pin electrode by internal thread hole with it is described
High pressure SF6/ casing airs are fixedly connected；The ground electrode of the metallic projections defect model for circle, the ground electrode it is straight
Footpath is that 120mm, the thickness of the ground electrode are 10mm, and the ground electrode is fixedly connected by internal thread hole with ground connection conducting rod.
3. the influence experimental provision that different metal material according to claim 2 is decomposed to SF6 direct currents PD, its feature exists
In the ground connection conducting rod is connected by grounded metal bar with the earth, is passed through between the grounded metal bar and ground connection conducting rod
Elevating screw thread is attached.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720245995.7U CN206584004U (en) | 2017-03-14 | 2017-03-14 | The influence experimental provision that a kind of different metal material is decomposed to SF6 direct currents PD |
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| CN201720245995.7U CN206584004U (en) | 2017-03-14 | 2017-03-14 | The influence experimental provision that a kind of different metal material is decomposed to SF6 direct currents PD |
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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 |
| CN110231550A (en) * | 2019-06-24 | 2019-09-13 | 广西电网有限责任公司电力科学研究院 | The experimental simulation device and method of gas insulated electric apparatus Arcing fault |
-
2017
- 2017-03-14 CN CN201720245995.7U patent/CN206584004U/en active Active
Cited By (3)
| 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 |
| CN110231550A (en) * | 2019-06-24 | 2019-09-13 | 广西电网有限责任公司电力科学研究院 | The experimental simulation device and method of gas insulated electric apparatus Arcing fault |
| CN110231550B (en) * | 2019-06-24 | 2021-04-06 | 广西电网有限责任公司电力科学研究院 | Experimental simulation device and method for arc discharge fault of gas insulated electrical equipment |
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