CN106602454B - Medium voltage switchgear equipment using trifluoroiodomethane and its mixture as dielectric - Google Patents
Medium voltage switchgear equipment using trifluoroiodomethane and its mixture as dielectric Download PDFInfo
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- CN106602454B CN106602454B CN201611163624.0A CN201611163624A CN106602454B CN 106602454 B CN106602454 B CN 106602454B CN 201611163624 A CN201611163624 A CN 201611163624A CN 106602454 B CN106602454 B CN 106602454B
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- Prior art keywords
- trifluoroiodomethane
- dielectric
- medium voltage
- voltage switchgear
- switchgear equipment
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- VPAYJEUHKVESSD-UHFFFAOYSA-N trifluoroiodomethane Chemical compound FC(F)(F)I VPAYJEUHKVESSD-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 239000000203 mixture Substances 0.000 title claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 6
- 239000010935 stainless steel Substances 0.000 claims abstract description 6
- 238000007664 blowing Methods 0.000 claims abstract description 5
- 230000005347 demagnetization Effects 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 55
- 238000007789 sealing Methods 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 15
- 239000004020 conductor Substances 0.000 claims description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 12
- 239000000945 filler Substances 0.000 claims description 12
- 239000003570 air Substances 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 6
- 239000001307 helium Substances 0.000 claims description 6
- 229910052734 helium Inorganic materials 0.000 claims description 6
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229920002379 silicone rubber Polymers 0.000 claims description 5
- 229910052810 boron oxide Inorganic materials 0.000 claims description 4
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 4
- ZHPNWZCWUUJAJC-UHFFFAOYSA-N fluorosilicon Chemical compound [Si]F ZHPNWZCWUUJAJC-UHFFFAOYSA-N 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims description 3
- 239000012815 thermoplastic material Substances 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 229920002521 macromolecule Polymers 0.000 claims 1
- 239000011777 magnesium Substances 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims 1
- 239000002023 wood Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 18
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 229910018503 SF6 Inorganic materials 0.000 description 18
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 18
- 229960000909 sulfur hexafluoride Drugs 0.000 description 18
- 239000000047 product Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 206010068052 Mosaicism Diseases 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- OCKPCBLVNKHBMX-UHFFFAOYSA-N butylbenzene Chemical compound CCCCC1=CC=CC=C1 OCKPCBLVNKHBMX-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000003765 sex chromosome Anatomy 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000026030 halogenation Effects 0.000 description 1
- 238000005658 halogenation reaction Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/055—Features relating to the gas
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses a kind of medium voltage switchgear equipments using trifluoroiodomethane and its mixture as dielectric, the blowing pressure of dielectric including the interior seal case shell equipped with electric component and the drying being filled in seal case shell, the dielectric is 0.1 MPa ~ 0.3MPa；The seal case shell is made of sheet metal part laser welding, and sheet metal part includes the demagnetization stainless steel of model 309,310,314 or 330；When the running environment residing for the medium voltage switchgear equipment is greater than or equal to 20 DEG C, the dielectric is trifluoroiodomethane；When the running environment residing for the medium voltage switchgear equipment is less than 20 DEG C, the dielectric is trifluoroiodomethane and assists the mixture of gas, and the wherein mixed volume ratio of trifluoroiodomethane is less than 40%, and the mixed volume ratio of gas is assisted to be higher than 60%.Advantageous effect：While realizing good insulation, environmental performance is substantially improved.
Description
Technical field
The present invention relates to a kind of medium voltage switchgear equipments, and trifluoroiodomethane and its mixture conduct are used more particularly to a kind of
The medium voltage switchgear equipment of dielectric, belongs to switching equipment technology.
Background technology
Middle pressure refers to voltage class more than 1kV (kilovolt), 126kV alternating currents below, and 1.5kV or more,
75kV direct currents below.And high pressure refers to the alternating current not less than 126kV and the direct current not less than 75kV.
Sulfur hexafluoride (SF6) is a kind of widely used electric insulation gas, is had many advantages, such as, but due to sulfur hexafluoride
(SF6) have significant greenhouse effects, global warming potential (GWP) is very high, thus by《The Kyoto Protocol》Be classified as by
The greenhouse gases used are limited, this brings tremendous influence to the prospect of the application and use cost of SF6.Therefore Novel ring is needed
It protects insulating gas and replaces SF6, apply in gas-insulated field.
Currently, including mainly using mixed gas reduction SF6 dosages, using for the way of SF6 effect on environment is reduced
Hyperbar buffer gas replaces SF6 etc..Using SF6 mixed gas as dielectric, although a kind of directly reducing SF6 gases
It uses, reduces the method that environment influences, but the dependence for fundamentally solving electric insulation for SF6 of still having no idea, it is right
The harm of environment can also be impacted by constantly accumulating.
Using hyperbar buffer gas, such as compressed air, compressed nitrogen (N2), due to the difference of gas properties and SF6,
Air or nitrogen are all unable to reach the insulation performance of pure SF6, very big using limitation, cannot be satisfied the demand of electric utility.
Therefore it needs to find new environment-friendly type insulated gas, replaces SF6, and certain voltage grade is carried out for gas is substituted
The exploitation of equipment.For this purpose, new environment-friendly type insulated gas there should be similar insulation performance with SF6, while meeting nonhazardous, no
Inflammable equal industrial applications requirement, will not have a negative impact to environment.
Invention content
It is a primary object of the present invention to, overcome deficiency in the prior art, provide it is a kind of using trifluoroiodomethane and its
Medium voltage switchgear equipment of the mixture as dielectric realizes good insulation, promotes environmental performance.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of medium voltage switchgear equipment using trifluoroiodomethane and its mixture as dielectric, including it is interior equipped with electrical
The dielectric of the seal case shell of component and the drying being filled in seal case shell, the blowing pressure of the dielectric
For 0.1MPa~0.3MPa；
The seal case shell is made of sheet metal part laser welding, sheet metal part include model 309,
310,314 or 330 demagnetization stainless steel；
When the running environment residing for the medium voltage switchgear equipment is greater than or equal to -20 DEG C, the dielectric is trifluoroiodomethane；
When the running environment residing for the medium voltage switchgear equipment is less than -20 DEG C, the dielectric is trifluoroiodomethane and auxiliary
The mixture of gas, the wherein mixed volume ratio of trifluoroiodomethane are less than 40%, and the mixed volume ratio of gas is assisted to be higher than 60%.
The present invention is further arranged to：The electric component includes cut-offfing/closing unit, isolation and ground unit, conductor
Part and insulating part, it is described to cut-off/close unit and isolation and ground unit is equipped with conductors and insulating part；
Be equipped with moveable element in the seal case shell, the moveable element and insulating part by sealing ring with
Seal case body seal is connected；
The insulating part is the conductor element of epoxy composite material cladding, and wherein epoxy composite material is aoxidized using micron order
Aluminium is filler, and additive amount is 40%~60%；
The sealing ring using the fluorine silicon elastomer that common micro-scaled filler is added, wherein common micro-scaled filler include aluminium oxide,
Magnesia or boron oxide.
The present invention is further arranged to：The top surface of the seal case shell is provided with charging valve, seal case shell
Bottom surface be provided with pressure release passage.
The present invention is further arranged to：Using welding between metal position in the electric component and seal case shell
Mode seals fixation.
The present invention is further arranged to：The sealing ring is X-type or O-shaped.
The present invention is further arranged to：It is described cut-off/close Solid support is connected on unit, the Solid support
It is made of polymer composite injection moulding, polymer composite is that short glass fiber of the Length of Glass Fiber less than 1mm increases
The thermoplastic material of strong type.
The present invention is further arranged to：The auxiliary gas is in air, nitrogen, carbon dioxide, helium, argon gas and oxygen
One kind or at least two mixing.
The present invention is further arranged to：When the running environment residing for the medium voltage switchgear equipment is less than -20 DEG C, for 12kV voltages
The mixed volume ratio of the medium voltage switchgear equipment of grade, the trifluoroiodomethane is 8%~10%, assists the mixed volume ratio of gas
It is 90%~92%.
The present invention is further arranged to：When the running environment residing for the medium voltage switchgear equipment is less than -20 DEG C, for 24kV voltages
The mixed volume ratio of the medium voltage switchgear equipment of grade, the trifluoroiodomethane is 10%~20%, assists the mixed volume of gas
Than being 80%~90%.
The present invention is further arranged to：When the running environment residing for the medium voltage switchgear equipment is less than -20 DEG C, for 40.5kV electricity
The medium voltage switchgear equipment of grade is pressed, the mixed volume ratio of the trifluoroiodomethane is 30%~35%, assists the mixture of gas
Product is than being 65%~70%.
Compared with prior art, the invention has the advantages that：
Environment is substantially improved while realizing good insulation as dielectric using trifluoroiodomethane and its mixture
Performance, wherein used by trifluoroiodomethane (CF3I) be colorless and odorless gas, global warming potential (GWP) almost and
CO2Quite, while it is zero to the destruction potentiality (ODP) of ozone layer, and existence time in an atmosphere is very short (less than 2
It), environment will not be adversely affected, so provided by the invention be situated between using trifluoroiodomethane and its mixture as insulation
The medium voltage switchgear equipment of matter does not destroy ozone layer, and greenhouse effects very little meets environmental protection characteristic requirement.Moreover, by seal box
The improvement of the material and its assembly connection mode of the improvement of body case and each electric component solves each portion of medium voltage switchgear equipment
Part is adapted to sex chromosome mosaicism with dielectric, to ensure safety, stability and the economy of medium voltage switchgear equipment.
The above is only the general introduction of technical solution of the present invention, in order to be better understood upon the technological means of the present invention, under
In conjunction with attached drawing, the invention will be further described in face.
Description of the drawings
Fig. 1 is the structural schematic diagram of medium voltage switchgear equipment of the present invention；
Fig. 2 is the structural schematic diagram of ball-plate electrode model in the embodiment of the present invention.
Specific implementation mode
With reference to the accompanying drawings of the specification, the present invention is further illustrated.
As shown in Figure 1, a kind of medium voltage switchgear equipment using trifluoroiodomethane and its mixture as dielectric, including
The dielectric of the interior seal case shell 1 equipped with electric component and the drying being filled in seal case shell 1, the insulation are situated between
The blowing pressure of matter is 0.1MPa~0.3MPa.
When the running environment residing for the medium voltage switchgear equipment is greater than or equal to -20 DEG C, the dielectric is trifluoroiodomethane；
When the running environment residing for the medium voltage switchgear equipment is less than -20 DEG C, the dielectric is trifluoroiodomethane and assists the mixed of gas
Object is closed, the wherein mixed volume ratio of trifluoroiodomethane is less than 40%, and the mixed volume ratio of gas is assisted to be higher than 60%.The auxiliary
Gas is one kind or at least two mixing in air, nitrogen, carbon dioxide, helium, argon gas and oxygen.
The seal case shell 1 is made of sheet metal part laser welding, it is ensured that 0.1MPa~0.3MPa's
The slip of air pressure range interior insulation medium is less than for 1 ‰/year；Wherein, sheet metal part include model 309,310,314 or
330 demagnetization stainless steel not only can guarantee and thermal losses do not occur under alternating current operating mode, but also can effectively prevent pad
Place occurs carbon particle and problem is precipitated, while ensureing in the environment of being contacted with trifluoroiodomethane not by highly acid, strong oxidizing property halogenation
Object corrodes.
The electric component includes cut-offfing/closing unit 2, isolation and ground unit 3, conductors 4 and insulating part 5, described
It cut-offs/closes unit 2 and isolation and ground unit 3 is equipped with conductors 4 and insulating part 5；The top of the seal case shell 1
Face is provided with charging valve 6, and the bottom surface of seal case shell 1 is provided with pressure release passage 7.
Moveable element is equipped in the seal case shell 1, the moveable element and insulating part 5 pass through sealing ring
It is connected with the sealing of seal case shell 1；The sealing ring is X-type or O-shaped.
The insulating part 5 is the conductor element of epoxy composite material cladding, and wherein epoxy composite material uses micron order oxygen
Change aluminium is filler, and additive amount is 40%~60%, it is ensured that it does not show with dielectric and its issuable by-product
The chemical reaction of work.
The sealing ring is using the fluorine silicon elastomer that common micro-scaled filler is added, rather than conventional use of butylbenzene rubber at present
Glue, silicon rubber or butyl rubber are made, and wherein common micro-scaled filler includes aluminium oxide, magnesia or boron oxide, to prevent by trifluoro
Iodomethane and its highly acid under electric arc environment, the corrosion of strong oxidizing property halide.
It is fixed using welding manner sealing between metal position in the electric component and seal case shell 1.
As shown in Figure 1, it is described cut-off/close Solid support 8 is connected on unit 2, the Solid support 8 is using high
Molecular composite material injection moulding is made, and polymer composite is that Length of Glass Fiber is enhanced less than the short glass fiber of 1mm
Thermoplastic material；It can be effectively prevent the corrosion of highly acid, strong oxidizing property medium to fibrous material, and injection molding technique can be realized
Rapid shaping and be not necessarily to subsequent machining.Solid support 8 in the present invention, than generally being adopted in the gas tank of conventional electronic devices
The component being prepared with epoxy impregnation glass fabric material and using machining mode, performance are significantly improved.
If there is micro-moisture exists in seal case shell 1, then would be possible to occur to chemically react as follows：
CF3I→C2F6+I2；I2+H2O→HI+HIO
The chemical substance that above-mentioned chemical reaction generates has certain chemical corrosivity, especially to conventional stainless steel metal plate
Silica filler in part and solid insulation.So seal case shell 1 is using the high trades mark such as 309,310,314,330
Stainless steel, sealing ring are reached and strong acid using the materials such as the fluorine silicon elastomer of aluminium oxide, magnesia or boron oxide as filler
Property the media such as substance and halide have good suitability.And conventional use of 304 stainless steel, the ring of silica filler
Oxygen part and butadiene-styrene rubber material then can be by I2, the dielectric corrosions such as HI, HIO.
Medium voltage switchgear equipment provided by the invention, the primary insulation gas used is trifluoroiodomethane, due to its boiling point phase
To height, need to be re-filled with after mixing with low boiling point, micro-molecular gas；Mixed gas with other gas ratios raising,
Gas liquefaction temperature, cost will reduce, and dielectric strength can also change therewith.
Embodiment 1：
Minimum temperature for indoor medium voltage switchgear equipment local environment is -20 DEG C, and the liquefaction temperature of trifluoroiodomethane
Degree is -22.5 DEG C.Such as the blowing pressure is 0.1MPa in medium voltage switchgear equipment at this time, and the content of trifluoroiodomethane can reach 100%,
Pure trifluoroiodomethane gas can be filled in seal case shell 1.The dielectric strength of the gas is about that conventional insulator gas is lithium
1.2 times of sulphur.
By taking ball-plate electrode model as an example, as shown in Fig. 2, gap be 20mm items extremely under, 0.1MPa six-component force balance gas
The breakdown voltage of body is 100kV, and breakdown voltage is about 120kV if the pure trifluoroiodomethane gas of use is as dielectric；
Dielectric strength of the i.e. pure sulfur hexafluoride under ball-plate electrode model is about 5kV/mm, and the dielectric strength of pure trifluoroiodomethane is about
For 6kV/mm.
In addition, in the design process as used pure trifluoroiodomethane as dielectric, each phase (three-phase of high-pressure conductor
Alternating current) gap in gap and high-pressure conductor above earth potential between conductor can refer to the Guidance Rule of sulfur hexafluoride, and can
Clearance distance is reduced about 15% or so.
By taking 40.5kV medium voltage switchgear equipment products as an example, power-frequency overvoltage 110kV, according to relevant criterion and directive/guide,
Alternate and minimum clear to ground the about 100mm of six-component force balance gas tank；Then in the present invention in voltage switching station, use
Pure trifluoroiodomethane gas-insulated, clearance for insulation can be reduced to 85mm.
Embodiment 2：
- 20 DEG C are less than for the minimum temperature of indoor medium voltage switchgear equipment local environment, and the liquefaction of trifluoroiodomethane
Temperature is -22.5 DEG C, therefore is needed using mixed gas as dielectric.In view of the factor in terms of cost, reduce main exhausted
The content of edge ingredient trifluoroiodomethane preferably has product certain benefit.
For the medium voltage switchgear equipment of 12kV voltage class, the crucial insulation system of traditional six-component force balance product
Minimum alternate and clearance to ground is designed as to open away from for 60mm not less than 30mm, fracture.Power-frequency overvoltage 42kV/ under this condition
48kV is kept for 1 minute, and lightning impulse overvoltage is 75kV/85kV.And using trifluoroiodomethane mixed proportion be about 8%~
10%, auxiliary gas includes other gases such as dry air, nitrogen, carbon dioxide, helium, argon gas and oxygen, can be by upper
State the examination under voltage conditions；The mixed gas condensing temperature of the ratio is about -60 DEG C, can meet -40 DEG C of outdoor low temperature completely
Environmental requirement.
Embodiment 3：
For the medium voltage switchgear equipment of 24kV voltage class, the minimum clearance of traditional six-component force balance product is about
30mm, fracture are opened away from for 75mm.Power-frequency overvoltage 65kV/79kV under this condition is kept for 1 minute, and lightning impulse overvoltage is
125kV/145kV.And use trifluoroiodomethane mixed proportion be about 10%~20%, auxiliary gas include dry air, nitrogen,
Other gases such as carbon dioxide, helium, argon gas and oxygen can pass through the examination under above-mentioned voltage conditions；The mixing of the ratio
Gas liquefaction temperature is about -55 DEG C, can meet -40 DEG C of environmental requirements of outdoor low temperature completely.
Embodiment 4：
For the medium voltage switchgear equipment of 40.5kV voltage class, the minimum clearance of traditional six-component force balance product is about
60mm, fracture are opened away from for 120mm.Power-frequency overvoltage 95kV/118kV under this condition is kept for 1 minute, lightning impulse overvoltage
For 185kV/215kV.And use trifluoroiodomethane mixed proportion be about 30~35%, auxiliary gas include dry air, nitrogen,
Other gases such as carbon dioxide, helium, argon gas and oxygen can pass through the examination under above-mentioned voltage conditions；The mixing of the ratio
Gas liquefaction temperature is about -30 DEG C~-35 DEG C, can meet -40 DEG C of environmental requirements of outdoor low temperature completely.It at this time can also be to equipment box
External size is modified, and it is 70mm that the critical size for needing to amplify switch product, which is that minimum clearance is about not less than, fracture open away from
For 140mm, realize that insulation size is best.
The innovation of the invention consists in that using trifluoroiodomethane and its mixture as dielectric, using special material
The parts such as sealing element, sheet metal and conductors and the solid insulation of switchgear are prepared, equipment and the insulation are solved
The adaptation sex chromosome mosaicism of medium；For different voltages grade, proper mixture ratio example is chosen, and use selected insulation size, from
And ensure safety, stability and the economy of switch electrical equipment.
The basic principles and main features and advantage of the present invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the originals of the present invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (9)
1. a kind of medium voltage switchgear equipment using trifluoroiodomethane and its mixture as dielectric, it is characterised in that：Including
The dielectric of the interior seal case shell equipped with electric component and the drying being filled in seal case shell, the dielectric
The blowing pressure be 0.1 MPa ~ 0.3MPa；
The seal case shell is made of sheet metal part laser welding, sheet metal part include model 309,310,
314 or 330 demagnetization stainless steel；
When the running environment residing for the medium voltage switchgear equipment is greater than or equal to -20 DEG C, the dielectric is trifluoroiodomethane；
When the running environment residing for the medium voltage switchgear equipment is less than -20 DEG C, the dielectric is trifluoroiodomethane and auxiliary gas
Mixture, wherein the mixed volume ratio of trifluoroiodomethane be less than 40%, assist gas mixed volume ratio be higher than 60%；
The electric component includes cut-offfing/closing unit, isolation and ground unit, conductors and insulating part, described to cut-off/close
Unit and isolation and ground unit are equipped with conductors and insulating part；
Moveable element is equipped in the seal case shell, the moveable element and insulating part pass through sealing ring and sealing
Cabinet shell sealing is connected；
The insulating part be epoxy composite material cladding conductor element, wherein epoxy composite material use micron grade aluminum oxide for
Filler, additive amount are 40% ~ 60%；
The sealing ring includes aluminium oxide, oxidation using the fluorine silicon elastomer that common micro-scaled filler is added, wherein common micro-scaled filler
Magnesium or boron oxide.
2. the medium voltage switchgear equipment according to claim 1 using trifluoroiodomethane and its mixture as dielectric,
It is characterized in that：The top surface of the seal case shell is provided with charging valve, and the bottom surface of seal case shell is provided with pressure release
Channel.
3. the medium voltage switchgear equipment according to claim 1 using trifluoroiodomethane and its mixture as dielectric,
It is characterized in that：It is fixed using welding manner sealing between metal position in the electric component and seal case shell.
4. the medium voltage switchgear equipment according to claim 1 using trifluoroiodomethane and its mixture as dielectric,
It is characterized in that：The sealing ring is X-type or O-shaped.
5. the medium voltage switchgear equipment according to claim 1 using trifluoroiodomethane and its mixture as dielectric,
It is characterized in that：It is described cut-off/close Solid support is connected on unit, the Solid support use macromolecule composite wood
Material injection forming is made, and polymer composite is the Length of Glass Fiber thermoplastic material enhanced less than the short glass fiber of 1mm.
6. the medium voltage switchgear equipment according to claim 1 using trifluoroiodomethane and its mixture as dielectric,
It is characterized in that：The auxiliary gas is one kind or at least two in air, nitrogen, carbon dioxide, helium, argon gas and oxygen
Mixing.
7. the medium voltage switchgear equipment according to claim 1 using trifluoroiodomethane and its mixture as dielectric,
It is characterized in that：When the running environment residing for the medium voltage switchgear equipment is less than -20 DEG C, the Medium voltage switch or circuit breaker of 12kV voltage class is set
Standby, the mixed volume ratio of the trifluoroiodomethane is 8% ~ 10%, and it is 90% ~ 92% to assist the mixed volume ratio of gas.
8. the medium voltage switchgear equipment according to claim 1 using trifluoroiodomethane and its mixture as dielectric,
It is characterized in that：When the running environment residing for the medium voltage switchgear equipment is less than -20 DEG C, the Medium voltage switch or circuit breaker of 24kV voltage class is set
Standby, the mixed volume ratio of the trifluoroiodomethane is 10% ~ 20%, and it is 80% ~ 90% to assist the mixed volume ratio of gas.
9. the medium voltage switchgear equipment according to claim 1 using trifluoroiodomethane and its mixture as dielectric,
It is characterized in that：When the running environment residing for the medium voltage switchgear equipment is less than -20 DEG C, for the Medium voltage switch or circuit breaker of 40.5kV voltage class
The mixed volume ratio of equipment, the trifluoroiodomethane is 30% ~ 35%, and it is 65% ~ 70% to assist the mixed volume ratio of gas.
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| CN201611163624.0A CN106602454B (en) | 2016-12-15 | 2016-12-15 | Medium voltage switchgear equipment using trifluoroiodomethane and its mixture as dielectric |
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| CN201611163624.0A CN106602454B (en) | 2016-12-15 | 2016-12-15 | Medium voltage switchgear equipment using trifluoroiodomethane and its mixture as dielectric |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107464679A (en) * | 2017-09-15 | 2017-12-12 | 苏州正罡互感器有限公司 | A kind of voltage transformer by the use of fluorinated mixed gas as dielectric |
| CN107968350A (en) * | 2017-10-24 | 2018-04-27 | 上海交通大学 | A kind of mixed gas arc-extinguishing medium of the trifluoroiodomethane of gas containing environment-friendly type and preparation method thereof |
| CN109300575A (en) * | 2018-09-25 | 2019-02-01 | 上海交通大学 | The mixed gas insulating medium and preparation method thereof of the trifluoroiodomethane of gas containing environment-friendly type |
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