CN106940416A - The influence experimental method that a kind of different metal material is decomposed to SF6 direct currents PD - Google Patents
The influence experimental method that a kind of different metal material is decomposed to SF6 direct currents PD Download PDFInfo
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- CN106940416A CN106940416A CN201710151215.7A CN201710151215A CN106940416A CN 106940416 A CN106940416 A CN 106940416A CN 201710151215 A CN201710151215 A CN 201710151215A CN 106940416 A CN106940416 A CN 106940416A
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- 239000007769 metal material Substances 0.000 title claims abstract description 33
- 238000002474 experimental method Methods 0.000 title claims abstract description 21
- 230000007547 defect Effects 0.000 claims abstract description 45
- 239000007789 gas Substances 0.000 claims abstract description 35
- 238000002347 injection Methods 0.000 claims description 25
- 239000007924 injection Substances 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 7
- 229910001369 Brass Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 239000010951 brass Substances 0.000 claims description 6
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 12
- 238000011160 research Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 8
- 230000010534 mechanism of action Effects 0.000 abstract description 5
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 76
- 229960000909 sulfur hexafluoride Drugs 0.000 description 75
- 230000008859 change Effects 0.000 description 11
- 239000003990 capacitor Substances 0.000 description 10
- 238000009413 insulation Methods 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000003028 elevating effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 101000856246 Arabidopsis thaliana Cleavage stimulation factor subunit 77 Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012491 analyte Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000012631 diagnostic technique Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 229910001512 metal fluoride Inorganic materials 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- OBTWBSRJZRCYQV-UHFFFAOYSA-N sulfuryl difluoride Chemical compound FS(F)(=O)=O OBTWBSRJZRCYQV-UHFFFAOYSA-N 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- DUGWRBKBGKTKOX-UHFFFAOYSA-N tetrafluoro(oxo)-$l^{6}-sulfane Chemical compound FS(F)(F)(F)=O DUGWRBKBGKTKOX-UHFFFAOYSA-N 0.000 description 1
- LSJNBGSOIVSBBR-UHFFFAOYSA-N thionyl fluoride Chemical compound FS(F)=O LSJNBGSOIVSBBR-UHFFFAOYSA-N 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The embodiment of the invention discloses the influence experimental method that a kind of different metal material is decomposed to SF6 direct currents PD, for solving 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.Present invention method includes：The detection of SF6 direct current PD decomposition components under carrying out different metal material protrusion defect model under the conditions of identical shelf depreciation.
Description
Technical field
The present invention relates to the insulated on-line monitoring of outlet openings insulator arrangement and diagnostic techniques field, more particularly to one kind is not
The influence experimental method decomposed with metal material 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, reliable
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 extensively, 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.
The content of the invention
The embodiments of the invention provide the influence experimental method that a kind of different metal material is decomposed to SF6 direct currents PD, solve
Rarely have in the prior art for the research that gas insulated electric apparatus is monitored on-line under DC condition and different metal material
Research to the SF6 gases PD influences decomposed, it is impossible to differentiate shadow of the different metal material to SF6 positive polarity direct current PD decomposable processes
Ring characteristic and the technical problem of mechanism of action.
The influence experimental method that a kind of different metal material provided in an embodiment of the present invention is decomposed to SF6 direct currents PD, including：
S1, with absolute ethyl alcohol to metallic projections defect model, air chamber capping and air chamber body in wall wipe, with except
Remove residual impurity；
After S2, installation metallic projections defect model, thief hatch ball valve, injection port ball valve and pressure gauge needle-valve are closed, and
Vacuum pump ball-valve is opened, vavuum pump is powered and run, SF6 electric discharge air chambers are vacuumized, when SF6 electric discharge chamber vacuum degree is
When 0.005~0,01MPa, vavuum pump and vacuum pump ball-valve, and static 24 hours, observation SF6 electric discharge air chamber sealings are closed successively
Property, and further exclude residual impurity of the absorption on wall；
S3, connect each experimental rig and check circuit；Pressure gauge needle-valve is opened, then opens vavuum pump and vavuum pump successively
Ball valve, vacuum is evacuated to by SF6 electric discharge air chambers again, when SF6 electric discharge chamber vacuum degree is 0.005~0.01MPa, is closed successively
Vavuum pump and vacuum pump ball-valve；Injection port ball valve is opened, and it 99.999% is SF6 gases to be filled with volume fraction to be from injection port,
Until when reading shown in pressure gauge is atmospheric pressure, closing injection port ball valve and stopping sample introduction；After standing 10 minutes, vacuum is opened successively
Pump and vacuum pump ball-valve, vacuum is evacuated to by SF6 electric discharge air chambers again, when SF6 electric discharge chamber vacuum degree is 0.005~0.01MPa
Shi Yici closes vavuum pump and vacuum pump ball-valve；S3 steps 3 time are repeated, fully to discharge foreign gas in air chamber；
S4, injection port ball valve is opened, and it 99.999% is SF6 gases to be filled with volume fraction to be from injection port, until SF6 is put
Electric room pressure reaches 0.3MPa；Injection port ball valve is closed, H2O the and O2 contents in the air chamber that discharges SF6 are measured, so
Stand 24 hours afterwards；
S5, regulation Regulation Control platform, are stepped up voltage, when PD pulses has just occurred in the waveform on high speed digital oscilloscope
When, voltage shown in the moment Regulation Control platform is recorded, and be designated as firing potential 20.75kV；Apply initial discharge electricity again
The voltage 24.9kV of 1.2 times of pressure makes metallic projections defect model produce direct current in SF6 electric discharge air chambers as experimental voltage
PD；
S6, within 96 hours that shelf depreciation is carried out, close Regulation Control platforms every 12 hours, opening vavuum pump will
The PTFE flexible pipes that thief hatch is connected with gas chromatography-mass spectrometry are evacuated to vacuum；Close vavuum pump and open thief hatch ball valve,
Sample gas is analyzed by gas chromatography-mass spectrometry；After analysis terminates, thief hatch ball valve is closed, and opens vavuum pump and is incited somebody to action
PTFE flexible pipes are evacuated to vacuum；Vavuum pump is closed, Regulation Control platform is adjusted to applied experimental voltage；
Metallic projections defect model include pure aluminum metal protrusion defect model, brass wire protrusion defect model,
18/8 stainless steel metal protrusion defect model.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
, can be good the embodiments of the invention provide the influence experimental method that a kind of different metal material is decomposed to SF6 direct currents PD
In good analog DC SF6 electric insulation equipment, the PD malfunctions that different metal protrusion defect is caused have filled up existing inspection
Different metal material can not be assessed by surveying the experimental facilities and method of SF6 decomposed gas components assessment SF6 insulation electrical equipment states
To the blank of the SF6 direct currents PD influences decomposed, to differentiate metal material to the SF6 direct currents PD influencing characterisitics decomposed and its effect machine
System creates possibility；For scientific research, teaching and engineering in practice, because of influence that different metal material defect is decomposed to SF6 direct currents PD
There is provided a kind of method of testing simple and easy to apply, solve in the prior art for grinding that gas insulated electric apparatus is monitored on-line
Study carefully the research for rarely having the influence under DC condition and different metal material to SF6 gases PD decomposition, it is impossible to differentiate different metal
Material is to the influencing characterisitic of SF6 positive polarity direct current PD decomposable processes and the technical problem of mechanism of action.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of influence reality decomposed to SF6 direct currents PD based on different metal material provided in the embodiment of the present invention
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 embodiment of the present invention；
Fig. 3 is a kind of top view of SF6 electric discharge air chambers provided in the embodiment of the present invention；
Fig. 4 is the structural representation of the metallic projections defect model provided in the embodiment of the present invention；
Fig. 5 is that the influence experimental method that the different metal material that provides is decomposed to SF6 direct currents PD in the embodiment of the present invention is examined
The CF of survey4The change curve of content；
Fig. 6 is that the influence experimental method that the different metal material that provides is decomposed to SF6 direct currents PD in the embodiment of the present invention is examined
The CO of survey2The change curve of content；
Fig. 7 is that the influence experimental method that the different metal material that provides is decomposed to SF6 direct currents PD in the embodiment of the present invention is examined
The SOF of survey2The change curve of content；
Fig. 8 is that the influence experimental method that the different metal material that provides is decomposed to SF6 direct currents PD in the embodiment of the present invention is examined
The SO of survey2F2The change curve of content；
Fig. 9 is that the influence experimental method that the different metal material that provides is decomposed to SF6 direct currents PD in the embodiment of the present invention is examined
The SO of survey2The 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 embodiments of the invention provide the influence experimental method that a kind of different metal material is decomposed to SF6 direct currents PD, it is used for
Solve rarely have DC condition and different metal material for the research that gas insulated electric apparatus is monitored on-line in the prior art
Under to SF6 gases PD decompose influence research, it is impossible to differentiate different metal material to SF6 positive polarity direct current PD decomposable processes
The technical problem of influencing characterisitic and mechanism of action.
To enable goal of the invention of the invention, feature, advantage more obvious and understandable, below in conjunction with the present invention
Accompanying drawing in embodiment, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of embodiment of the invention, and not all embodiment.Based on the embodiment in the present invention, this area
All other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to protection of the present invention
Scope.
For ease of understanding, a kind of different metal material provided in an embodiment of the present invention is decomposed to SF6 direct currents PD first
Experimental rig involved by influence experimental method is described in detail.
Referring to Fig. 1, a kind of influence reality decomposed based on different metal material to SF6 direct currents PD in the embodiment of the present invention
Experiment device 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.
The influence experimental method that a kind of different metal material provided in an embodiment of the present invention is decomposed to SF6 direct currents PD, including：
S1, with absolute ethyl alcohol to metallic projections defect model 15, air chamber capping 13 and air chamber body in wall 14 wipe
Wipe, to remove residual impurity, wherein metallic projections defect model 15 is pure aluminum metal protrusion defect model；
After S2, installation metallic projections defect model 15, thief hatch ball valve 16, injection port ball valve 21 and pressure indicator are closed
Valve 25, and open vacuum pump ball-valve 24, vavuum pump 23 is powered operation, SF6 electric discharge air chambers 10 are vacuumized, when SF6 discharges gas
When the vacuum of room 10 is 0.005~0,01MPa, vavuum pump 23 and vacuum pump ball-valve 24, and static 24 hours, observation are closed successively
The SF6 electric discharge sealings of air chamber 10, and further exclude residual impurity of the absorption on wall；
S3, connect each experimental rig and check circuit；Pressure gauge needle-valve 25 is opened, then opens vavuum pump 23 successively and true
Empty pump ball-valve 24, vacuum is evacuated to by SF6 electric discharge air chambers 10 again, when SF6 electric discharge air chamber 10 vacuums are 0.005~0.01MPa
When, vavuum pump 23 and vacuum pump ball-valve 24 are closed successively；Injection port ball valve 21 is opened, and volume fraction is filled with from injection port 22 and is
99.999% is SF6 gases, until when reading shown in pressure gauge 26 is atmospheric pressure, closing injection port ball valve 21 and stopping sample introduction；It is quiet
Put after 10 minutes, vavuum pump 23 and vacuum pump ball-valve 24 are opened successively, SF6 electric discharge air chambers 10 are evacuated to vacuum again, when SF6 is put
The vacuum of electric panel room 10 closes vavuum pump 23 and vacuum pump ball-valve 24 successively when being 0.005~0.01MPa；S3 steps 3 time are repeated,
Fully to discharge foreign gas in air chamber；
S4, open injection port ball valve 21, and it 99.999% is SF6 gases to be filled with volume fraction to be from injection port 22, until
Air pressure reaches 0.3MPa in SF6 electric discharge air chambers 10；Injection port ball valve 21 is closed, H2O the and O2 contents in the air chamber 10 that discharges SF6
Measure, it is ensured that H2O and O2 contents meet IEC 60480-2004 and wanted with China-styled Certain Industry Field standard DL/T596-2005 in air chamber
Ask, then stand 24 hours；
S5, regulation Regulation Control platform 1, are stepped up voltage, when PD pulses has just occurred in the waveform on high speed digital oscilloscope 9
When, voltage shown in the moment Regulation Control platform 1 is recorded, and be designated as firing potential 20.75kV；Apply initial discharge electricity again
The voltage 24.9kV of 1.2 times of pressure makes metallic projections defect model 15 be produced in SF6 electric discharge air chambers 10 straight as experimental voltage
Flow PD；
S6, within 96 hours that shelf depreciation is carried out, close Regulation Control platforms 1 every 12 hours, open vavuum pump
The PTFE flexible pipes that thief hatch 17 is connected with gas chromatography-mass spectrometry 11 are evacuated to vacuum by 18；Close vavuum pump 18 and open and adopt
Sample mouthful ball valve 16, is analyzed sample gas by gas chromatography-mass spectrometry 11；After analysis terminates, thief hatch ball valve is closed
16, and open vavuum pump 18 PTFE flexible pipes are evacuated to vacuum；Vavuum pump 18 is closed, Regulation Control platform 1 is adjusted to applied reality
Electrical verification pressure；
After S1~S6 steps are completed using pure aluminum metal protrusion defect model, Regulation Control platform 1 is closed, is beaten successively
Vavuum pump 23 and vacuum pump ball-valve 24 are driven, SF6 electric discharge air chambers 10 are evacuated to vacuum again.When the SF6 electric discharges vacuum of air chamber 10 is
During 0.005~0.01MPa, vavuum pump 23 and vacuum pump ball-valve 24 are closed successively；Changing pure aluminum metal protrusion defect model is
Brass wire protrusion defect model, returns to step S1, then repeatedly S1-S6 steps；
After S1~S6 steps are completed using brass wire protrusion defect model, Regulation Control platform 1 is closed, is beaten successively
Vavuum pump 23 and vacuum pump ball-valve 24 are driven, SF6 electric discharge air chambers 10 are evacuated to vacuum again.When the SF6 electric discharges vacuum of air chamber 10 is
During 0.005~0.01MPa, vavuum pump 23 and vacuum pump ball-valve 24 are closed successively；Changing brass wire protrusion defect model is
18/8 stainless steel metal protrusion defect model, returns to step S1, then repeatedly S1-S6 steps.
Fig. 5~Fig. 9 is referred to, different metal material respectively provided in an embodiment of the present invention is decomposed to SF6 direct currents PD
Influence corresponding the detected CF of experimental method4The change curve of content, CO2The change curve of content, SOF2The change of content
Change curve map, SO2F2The change curve of content, SO2The change curve of content.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to before
Embodiment is stated the present invention is described in detail, it will be understood by those within the art that：It still can be to preceding
State the technical scheme described in each embodiment to modify, or equivalent is carried out to which part technical characteristic；And these
Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (1)
1. the influence experimental method that a kind of different metal material is decomposed to SF6 direct currents PD, it is characterised in that including：
S1, with absolute ethyl alcohol to metallic projections defect model, air chamber capping and air chamber body in wall wipe, it is residual to remove
Stay impurity；
After S2, installation metallic projections defect model, thief hatch ball valve, injection port ball valve and pressure gauge needle-valve are closed, and open
Vacuum pump ball-valve, vavuum pump is powered and run, and SF6 electric discharge air chambers are vacuumized, when SF6 electric discharge chamber vacuum degree be 0.005~
When 0,01MPa, vavuum pump and vacuum pump ball-valve, and static 24 hours are closed successively, and observation SF6 electric discharge air chamber sealings are gone forward side by side
One step excludes residual impurity of the absorption on wall；
S3, connect each experimental rig and check circuit；Pressure gauge needle-valve is opened, then opens vavuum pump and vavuum pump ball successively
Valve, vacuum is evacuated to by SF6 electric discharge air chambers again, when SF6 electric discharge chamber vacuum degree is 0.005~0.01MPa, is closed successively true
Empty pump and vacuum pump ball-valve；Injection port ball valve is opened, and it 99.999% is SF6 gases to be filled with volume fraction to be from injection port, directly
When to reading shown in pressure gauge being atmospheric pressure, close injection port ball valve and stop sample introduction；After standing 10 minutes, vavuum pump is opened successively
With vacuum pump ball-valve, SF6 electric discharge air chambers are evacuated to vacuum again, when SF6 electric discharge chamber vacuum degree is 0.005~0.01MPa
Vavuum pump and vacuum pump ball-valve are closed successively；S3 steps 3 time are repeated, fully to discharge foreign gas in air chamber；
S4, injection port ball valve is opened, and it 99.999% is SF6 gases to be filled with volume fraction to be from injection port, the gas until SF6 discharges
Room pressure reaches 0.3MPa；Injection port ball valve is closed, H2O the and O2 contents in the air chamber that discharges SF6 are measured, Ran Houjing
Put 24 hours；
S5, regulation Regulation Control platform, are stepped up voltage, when PD pulses has just occurred in the waveform on high speed digital oscilloscope, note
The lower voltage shown in the moment Regulation Control platform of record, and it is designated as firing potential 20.75kV；Apply firing potential 1.2 again
Voltage 24.9kV again makes metallic projections defect model produce direct current PD in SF6 electric discharge air chambers as experimental voltage；
S6, within 96 hours that shelf depreciation is carried out, close Regulation Control platforms every 12 hours, opening vavuum pump will sample
The PTFE flexible pipes that mouth is connected with gas chromatography-mass spectrometry are evacuated to vacuum；Close vavuum pump and open thief hatch ball valve, pass through
Gas chromatography-mass spectrometry is analyzed sample gas；After analysis terminates, thief hatch ball valve is closed, and open vavuum pump by PTFE
Flexible pipe is evacuated to vacuum；Vavuum pump is closed, Regulation Control platform is adjusted to applied experimental voltage；
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.
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| CN108872422A (en) * | 2018-06-13 | 2018-11-23 | 云南电网有限责任公司昆明供电局 | A kind of SF6Characteristics of decomposition component adsorption experimental apparatus and method |
| CN110108990A (en) * | 2019-05-10 | 2019-08-09 | 沈阳工业大学 | A kind of experimental rig and method for environmental-protective gas-insulating performance study |
| CN110208368A (en) * | 2019-07-16 | 2019-09-06 | 广东电网有限责任公司 | A kind of the insulating gas electric discharge and decomposition experiment equipment of hyperbar high voltage |
| CN113745050A (en) * | 2021-08-31 | 2021-12-03 | 西安交通大学 | Vacuum degree on-line monitoring device and method |
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Application publication date: 20170711 |