CN110534322A - A kind of superconducting current-limiting transformer - Google Patents
A kind of superconducting current-limiting transformer Download PDFInfo
- Publication number
- CN110534322A CN110534322A CN201910971472.4A CN201910971472A CN110534322A CN 110534322 A CN110534322 A CN 110534322A CN 201910971472 A CN201910971472 A CN 201910971472A CN 110534322 A CN110534322 A CN 110534322A
- Authority
- CN
- China
- Prior art keywords
- liquid nitrogen
- superconductor
- transformer
- superconducting current
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 184
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 92
- 239000007788 liquid Substances 0.000 claims abstract description 84
- 239000002887 superconductor Substances 0.000 claims abstract description 28
- 238000009413 insulation Methods 0.000 claims abstract description 23
- 230000009466 transformation Effects 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000006071 cream Substances 0.000 claims abstract description 9
- 239000003822 epoxy resin Substances 0.000 claims abstract description 5
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 5
- 238000010992 reflux Methods 0.000 claims description 15
- 238000007654 immersion Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 4
- 230000006698 induction Effects 0.000 abstract description 3
- 230000004044 response Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000004020 conductor Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
The present invention relates to transformer technology fields, disclose a kind of superconducting current-limiting transformer, including voltage transformation unit and current limiter, the voltage transformation unit includes transformer shell, iron core and the coil being set on iron core, the transformer shell is equipped with insulation core, the insulation core interior central is equipped with green cream mud column, successively wraps up insulating layer and epoxy resin layer on the outside of the blueness cream mud column；The current limiter includes liquid nitrogen container, liquid nitrogen and superconductor, and the liquid nitrogen is arranged in liquid nitrogen container, and the superconductor is fixed on the upper cover of liquid nitrogen container and immerses in liquid nitrogen, and the upper cover is equipped with conducting rod, and the conducting rod is connect with superconductor.The transformer can effectively inhibit short circuit current, increase the insulating properties of transformer, reduce load consumption and thermal losses, improve working efficiency, and superconductor induction is sensitive, quenches and is swift in response, effective protection transformer.
Description
Technical field
The present invention relates to transformer technology field more particularly to a kind of superconducting current-limiting transformers.
Background technique
Transformer power-off will cause surge, and voltage can increase at double, burn out equipment, and there are huge security risks.Superconduction
Material resistance in superconducting state is zero, and with the characteristic of certain resistance after quenching, when short trouble occurs for circuit, it is more than
The fault current of superconducting component critical current quenches it, generates certain resistance, plays the role of inhibiting short circuit current.
The insulation performance of transformer requires height, and general electric leakage will cause huge risk and accident.
The general transfer efficiency of the radiator of transformer is low, and the technical problem of refrigeration and insulation can not be captured any more always.Generally
The load energy consumption of transformer is very high, and general superconducting coil is all placed in low temperature environment, but will increase the unloaded damage of transformer
Consumption, while increasing thermal losses, reduce the efficiency of transformer.
Summary of the invention
It is an object of the invention to solve above-mentioned technical problem, the technical solution adopted is that:
A kind of superconducting current-limiting transformer, including voltage transformation unit and current limiter, the voltage transformation unit include transformer shell, iron core and
The coil being set on iron core, the transformer shell are equipped with insulation core, and the insulation core interior central is equipped with green cream mud
Insulating layer and epoxy resin layer are successively wrapped up in column, blueness cream mud column outside；The current limiter includes liquid nitrogen container, liquid nitrogen container
Superconductor in interior liquid nitrogen and immersion liquid nitrogen, the liquid nitrogen container are set there are two conducting rod, and the conducting rod, which is equipped with, immerses liquid
The immersion end of nitrogen and the connecting pin being arranged in outside liquid nitrogen container, the superconductor connect the immersion end of two conducting rods；Described two
Conducting wire is equipped between the immersion end of a conducting rod, the conducting wire is in parallel with superconductor, and one on the superconductor section, which is arranged with, to be led
One section of spacing of thermal insulation elastic rubber sleeve, the conducting wire is densely wrapped in heat conductive insulating elastic rubber sleeve.
When high current passes through, temperature rises, and superconductor quenches, and electric current is just dispersed by conductor, not will cause large area
Power-off, effectively inhibit short circuit current effect.
Coil is separated with low temperature environment, so that low energy consumption for the load of transformer, thermal losses is reduced, to improve transformer
Working efficiency.Coil is common metal, not superconducting coil, and superconducting coil is expensive, Chen Bengao.Superconductor of the present invention exists
It in current limiter, is separated with voltage transformation unit, current limiter is connect with voltage transformation unit；When circuit event occurs for voltage transformation unit or transformer
Hindering short circuit etc., generates biggish electric current, conducting wire generates heat, so that superconductor quenches, become normal resistance, share current,
It prevents device current excessive, causes danger.
Conducting wire is wrapped on superconductor, between the two insulation connection, short circuit or damage, conductor overheating, and heat can be with
It is directly transferred on superconductor, so that superconductor quenches.Superconductor induction is sensitive, is swift in response.
Insulation core be connection line end, be easiest to electric leakage part, transformer leakage will cause can not anticipated losses,
Insulation core increases the insulating properties of transformer, high temperature resistant.Improve safety.
Further, the current limiter further includes liquid nitrogen circulator, and the liquid nitrogen circulator includes cabinet, is arranged in machine
The liquid nitrogen compressed pipe and cooling tube of compressor, connect compressor in case.
Further, the liquid nitrogen compressed pipe is connected to the nitrogen extraction opening of liquid nitrogen container upper cover, and cooling tube is equipped with and liquid nitrogen
The liquid nitrogen of reservoir restores import.Liquid nitrogen recycles.
Further, the current limiter further includes the liquid nitrogen reflux case being connected to liquid nitrogen container, and the liquid nitrogen reflux case includes
Shell, hothouse and liquefied room, the hothouse and liquefied room are arranged in shell and are interconnected.
Further, the upper cover of the liquid nitrogen reflux case and liquid nitrogen container is connected with first pipe, the lower cover with liquid nitrogen container
It is connected with second pipe.
Liquid nitrogen is the ideal industrial refrigeration agent of effect.The vaporization of liquid nitrogen needs to absorb a large amount of heat, sponges superconduction member
Part quenches the heat of generation, and heat is eliminated in the short time, is achieved the effect that cooling.
Liquid nitrogen reflux case can recycle liquid nitrogen, save old.When gaseous nitrogen circulates, moisture is absorbed, improves purity, is increased
Add cooling effect.
Further, the hothouse successively includes inlet tube, drying layer, circulate layer and outlet, the drying layer and stream
Logical layer is arranged alternately.
Further, the hothouse lower end is equipped with pools zone.Hothouse is detachably connected, and pools zone is used to drain.
Further, the liquefied room is equipped with booster pump.
Further, the shell is equipped with display screen, control button and handle.Display screen shows the temperature of liquid nitrogen reflux case
Degree, pressure, current parameters.
Further, parachute skirt is equipped on the outside of the insulation core.Fire prevention, fire-retardant, insulation and high temperature resistant etc..
Compared with prior art, the invention has the following advantages: effectively inhibiting short circuit current, increase the exhausted of transformer
Edge reduces load consumption and thermal losses, improves working efficiency, and superconductor induction is sensitive, quenches and is swift in response, and effective protection becomes
Depressor.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is side schematic view of the invention.
Fig. 3 is the structural schematic diagram of insulation core.
Fig. 4 is current limiter and liquid nitrogen reflux case combination schematic diagram in another embodiment.
Fig. 5 is the side schematic view of liquid nitrogen container.
Fig. 6 is the winding schematic diagram of superconductor and conducting wire.
Fig. 7 is liquid nitrogen reflux case schematic diagram.
Fig. 8 is liquid nitrogen reflux case schematic diagram of internal structure.
Fig. 9 is drying chamber structure schematic diagram.
In figure: voltage transformation unit 1, current limiter 2, insulation core 3, green cream mud column 4, insulating layer 5, epoxy resin layer 6, liquid nitrogen hold
Device 7, superconductor 9, conducting rod 10, immerses end 11, connecting pin 12, conducting wire 13, heat conductive insulating elastic rubber sleeve 14, machine at liquid nitrogen 8
Case 15, compressor 16, liquid nitrogen compressed pipe 17, cooling tube 18, nitrogen extraction opening 19, liquid nitrogen reduction import 20, liquid nitrogen reflux case 21,
Shell 22, liquefied room 24, first pipe 25, second pipe 26, inlet tube 27, drying layer 28, circulation layer 29, goes out hothouse 23
Mouth pipe 30, pools zone 31, booster pump 32, display screen 33, control button 34, handle 35, parachute skirt 36.
Specific embodiment
Below in conjunction with drawings and embodiments, the present invention is further illustrated, positional relationship described in the text and attached drawing
The positional relationship direction of itself is consistent, only for sake of convenience, does not play restriction effect to structure of the invention.
The present invention is a kind of superconducting current-limiting transformer, as shown in Figure 1,2 and 3, including voltage transformation unit 1 and current limiter 2, transformation
It is arranged before and after unit and current limiter.The voltage transformation unit includes transformer shell, iron core and the coil being set on iron core, coil
It is arranged to the cylinder of oval cross section, is wrapped on iron core.The transformer shell is set there are four insulation core 3, described
Insulation core interior central is equipped with green cream mud column 4, successively wraps up insulating layer 5 and epoxy resin layer 6, institute on the outside of the blueness cream mud column
It states and is equipped with parachute skirt 30 on the outside of insulation core.Insulating layer has high breakdown strength, low dielectric loss, quite high insulated electro
Resistance, insulation performance are steady in a long-term.
The current limiter, which is additionally provided in cabinet 15, cabinet, is equipped with compressor 16, and 16 one end of compressor connects cooling tube 18, separately
One end connects liquid nitrogen compressed pipe 17, and the liquid nitrogen compressed pipe is connected to three nitrogen extraction openings 19 of liquid nitrogen container upper cover, cooling
Pipe is equipped with the liquid nitrogen reduction import 20 being connected to liquid nitrogen container.The nitrogen of evaporation comes out from nitrogen extraction opening to be compressed by liquid nitrogen
Pipe, compressor, cooling tube and liquid nitrogen reduction import return in liquid nitrogen container again.Circulating repetition uses.
As it can be seen in figures 5 and 6, the current limiter includes liquid nitrogen container 7, the liquid nitrogen 8 in liquid nitrogen container and immerses in liquid nitrogen
Superconductor 9, the liquid nitrogen container are set there are two conducting rod 10, and the conducting rod is equipped with the immersion end 11 for immersing liquid nitrogen and setting exists
Connecting pin 12 outside liquid nitrogen container,
Connecting pin is for connecting voltage transformation unit or transformer.The superconductor connects the immersion end of two conducting rods；It is described two
Conducting wire 13 is equipped between the immersion end of conducting rod, the conducting wire is in parallel with superconductor, and one on the superconductor section, which is arranged with, to be led
One section of spacing of thermal insulation elastic rubber sleeve 14, the conducting wire is densely wrapped in heat conductive insulating elastic rubber sleeve.It leads
Line and superconductor insulate.Conducting wire is directed heat transfer to superconductor, so that it is rapid to quench effect, high sensitivity.
If Fig. 4 and 8 is another embodiment, the current limiter further includes the liquid nitrogen reflux case 21 being connected to liquid nitrogen container,
The liquid nitrogen reflux case includes shell 22, hothouse 23 and liquefied room 24, the hothouse and liquefied room be arranged in shell and
It is interconnected.The upper cover of the liquid nitrogen reflux case and liquid nitrogen container is connected with first pipe 25, connect with the lower cover of liquid nitrogen container
There is second pipe 26.Gaseous nitrogen absorbs moisture by hothouse and enters liquefied room, re-liquefied at liquid nitrogen, flows back to liquid nitrogen container
It is interior.
As shown in figures 7 and 9, the hothouse successively includes inlet tube 21, drying layer 22, circulate layer 23 and outlet 24,
The drying layer is arranged alternately with circulation layer.The hothouse lower end is equipped with pools zone 25.The moisture of collection can be assembled automatically
In pools zone.The liquefied room is equipped with booster pump 26, increases the mobility of the circulatory system.The shell is equipped with display screen
27, control button 28 and handle 29.
Present invention is not limited to the embodiments described above, within the knowledge of a person skilled in the art, also
It can make a variety of changes without departing from the purpose of the present invention.
Claims (10)
1. a kind of superconducting current-limiting transformer, it is characterised in that: including voltage transformation unit and current limiter, the voltage transformation unit includes transformation
Device shell, iron core and the coil being set on iron core, the transformer shell are equipped with insulation core, occupy inside the insulation core
In be equipped with green cream mud column, successively wrap up insulating layer and epoxy resin layer on the outside of the blueness cream mud column；
The current limiter includes liquid nitrogen container, the liquid nitrogen in liquid nitrogen container and the superconductor in immersion liquid nitrogen, the liquid nitrogen container
If the conducting rod is equipped with the connecting pin immersing the immersion end of liquid nitrogen and being arranged in outside liquid nitrogen container, described there are two conducting rod
Superconductor connects the immersion end of two conducting rods；
Conducting wire is equipped between the immersion end of described two conducting rods, the conducting wire is in parallel with superconductor, one on the superconductor
Section is arranged with heat conductive insulating elastic rubber sleeve, and one section of spacing of the conducting wire is densely wrapped in heat conductive insulating elastic rubber set
Guan Shang.
2. superconducting current-limiting transformer according to claim 1, it is characterised in that: the current limiter further includes liquid nitrogen circulation dress
It sets, the liquid nitrogen circulator includes cabinet, the compressor being arranged in cabinet, the liquid nitrogen compressed pipe of connect compressor and cooling
Pipe.
3. superconducting current-limiting transformer according to claim 2, it is characterised in that: on the liquid nitrogen compressed pipe and liquid nitrogen container
The nitrogen extraction opening of lid is connected to, and cooling tube is equipped with the liquid nitrogen reduction import being connected to liquid nitrogen container.
4. superconducting current-limiting transformer according to claim 1, it is characterised in that: the current limiter further includes and liquid nitrogen container
The liquid nitrogen reflux case of connection, the liquid nitrogen reflux case include shell, hothouse and liquefied room, and the hothouse and liquefied room are arranged
In shell and it is interconnected.
5. superconducting current-limiting transformer according to claim 4, it is characterised in that: the liquid nitrogen reflux case and liquid nitrogen container
Upper cover is connected with first pipe, is connected with second pipe with the lower cover of liquid nitrogen container.
6. superconducting current-limiting transformer according to claim 4, it is characterised in that: the hothouse successively include inlet tube,
Drying layer, circulation layer and outlet, the drying layer are arranged alternately with circulation layer.
7. superconducting current-limiting transformer according to claim 4, it is characterised in that: the hothouse lower end is equipped with pools zone.
8. superconducting current-limiting transformer according to claim 4, it is characterised in that: the liquefied room is equipped with booster pump.
9. superconducting current-limiting transformer according to claim 4, it is characterised in that: the shell is equipped with display screen, control
Button and handle.
10. superconducting current-limiting transformer according to claim 1, it is characterised in that: be equipped with insulation on the outside of the insulation core
Full skirt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910971472.4A CN110534322A (en) | 2019-10-14 | 2019-10-14 | A kind of superconducting current-limiting transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910971472.4A CN110534322A (en) | 2019-10-14 | 2019-10-14 | A kind of superconducting current-limiting transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110534322A true CN110534322A (en) | 2019-12-03 |
Family
ID=68671812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910971472.4A Pending CN110534322A (en) | 2019-10-14 | 2019-10-14 | A kind of superconducting current-limiting transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110534322A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08223790A (en) * | 1995-02-08 | 1996-08-30 | Toshiba Corp | Superconducting current limiter |
| FR2768850A1 (en) * | 1997-09-24 | 1999-03-26 | Schneider Electric Sa | Self-protected voltage transformer having PTC current limiter of filled polymer type |
| JPH1197260A (en) * | 1997-09-17 | 1999-04-09 | Nissin Electric Co Ltd | Superconducting transformer attached with current-limiting device |
| JP2001008359A (en) * | 1999-06-15 | 2001-01-12 | Hitachi Cable Ltd | Superconductivity current limiter |
| US20050016758A1 (en) * | 2001-12-26 | 2005-01-27 | Golner Thomas M. | Method and apparatus for connecting high voltage leads to a high temperature super-conducting transformer |
| US20050099253A1 (en) * | 2003-10-15 | 2005-05-12 | Joachim Bock | Superconducting current limiting device with magnetic field assisted quenching |
| KR20110035544A (en) * | 2009-09-30 | 2011-04-06 | 한국전력공사 | Protection apparatus of transformer |
| JP2012033755A (en) * | 2010-07-30 | 2012-02-16 | Fujikura Ltd | Superconducting device protective operation method and superconducting device |
| CN206432707U (en) * | 2017-01-13 | 2017-08-22 | 南京电气高压套管有限公司 | A kind of vacuum glue soaks fibers at low temperature superconductive current limiter dry sleeve |
| CN209199711U (en) * | 2018-11-12 | 2019-08-02 | 广东电网有限责任公司 | A kind of superconductive current limiter |
| CN210467554U (en) * | 2019-10-14 | 2020-05-05 | 浙江宝威电气有限公司 | Superconducting current-limiting transformer |
-
2019
- 2019-10-14 CN CN201910971472.4A patent/CN110534322A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08223790A (en) * | 1995-02-08 | 1996-08-30 | Toshiba Corp | Superconducting current limiter |
| JPH1197260A (en) * | 1997-09-17 | 1999-04-09 | Nissin Electric Co Ltd | Superconducting transformer attached with current-limiting device |
| FR2768850A1 (en) * | 1997-09-24 | 1999-03-26 | Schneider Electric Sa | Self-protected voltage transformer having PTC current limiter of filled polymer type |
| JP2001008359A (en) * | 1999-06-15 | 2001-01-12 | Hitachi Cable Ltd | Superconductivity current limiter |
| US20050016758A1 (en) * | 2001-12-26 | 2005-01-27 | Golner Thomas M. | Method and apparatus for connecting high voltage leads to a high temperature super-conducting transformer |
| US20050099253A1 (en) * | 2003-10-15 | 2005-05-12 | Joachim Bock | Superconducting current limiting device with magnetic field assisted quenching |
| KR20110035544A (en) * | 2009-09-30 | 2011-04-06 | 한국전력공사 | Protection apparatus of transformer |
| JP2012033755A (en) * | 2010-07-30 | 2012-02-16 | Fujikura Ltd | Superconducting device protective operation method and superconducting device |
| CN206432707U (en) * | 2017-01-13 | 2017-08-22 | 南京电气高压套管有限公司 | A kind of vacuum glue soaks fibers at low temperature superconductive current limiter dry sleeve |
| CN209199711U (en) * | 2018-11-12 | 2019-08-02 | 广东电网有限责任公司 | A kind of superconductive current limiter |
| CN210467554U (en) * | 2019-10-14 | 2020-05-05 | 浙江宝威电气有限公司 | Superconducting current-limiting transformer |
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