CN1244288A - Winding with spacers - Google Patents
Winding with spacers Download PDFInfo
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- CN1244288A CN1244288A CN 98801966 CN98801966A CN1244288A CN 1244288 A CN1244288 A CN 1244288A CN 98801966 CN98801966 CN 98801966 CN 98801966 A CN98801966 A CN 98801966A CN 1244288 A CN1244288 A CN 1244288A
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- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
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- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
A winding (3) is formed according to a coil having winding turns lying radially on top of each other, wherein the winding (3) is formed by a high-voltage cable (111) provided with an outer semiconducting layer (115), and wherein the winding (3) is provided with spacers (8, 9) arranged axially between each turn of the winding for separating the winding, said spacers being provided with a grounding element (11,17,18,28) connected to the semiconducting layer (115) in the high-voltage cable (111).
Description
The present invention relates to air cooled by winding in the power transformer of cable winding or the winding in reactor, described winding is equipped with the distance piece between each cable winding, so that can realize air cooling and ground connection according to mechanically relevant winding construction.
The modern electric transformer is normally oil cooled.Transformer has the iron core that some iron core support arms of being coupled together by yoke constitute, and the winding (elementary, secondary, control) that is formed by coil, and these parts are immersed in the oil-filled airtight container.The Btu utilization that produces in coil and iron core is taken away by the interior oil circulation of coil and iron core, and the wall of this heat by container is transferred in the ambient air.The circulation of this oil can be compulsory type promptly with pump with the oil circulation or can be that the temperature difference in oil of promptly utilizing of natural style forms.Utilize air cooling or water-cooling apparatus externally recycle oil to be cooled off.Extraneous air cooling can or compulsory type and/or realize by natural draft.Except heat transfer effect with external oil cooling but in the formula high-tension transformer oil also play insulating effect.
Dry-type transformer is normally air cooled.Since contemporary dry-type transformer be used for low electrical load they normally by the natural draft cooling.Technology of the present invention relates to the axial cooling duct of the winding generation that utilizes coiling, as in GB 1147049, introducing, the axial passage that is used for cooling off winding is embedded in the resin of casting, as in EP 83107410.9, introducing, and under peak load, utilize cross flow fan, as in SE 7303919-0, introducing.
Because the winding that can utilize high-tension cable to form constitutes the dry-type transformer of capacity greater than existing dry-type power transformer, these new power transformers need more effectively cooling.Therefore in order to satisfy cooling needs forced ventilation in all windings.Utilizing short approach is important with heat delivered in cooling agent, and heat is transferred in the cooling agent effectively.Therefore all windings are directly contacted with the cooling agent of quantity sufficient.
Conventional power transformer also is equipped with some specific rings, bears the electrodynamic stability that short circuit causes so that guarantee winding.Each winding as an overall package on iron core.After a series of pressing plate is installed, with respect to a dividing plate cylinder they are clamped again.Whole assembly basis spacer ring is down installed aligning.A pressure rings is located between iron core yoke and the winding so that to each winding precharge.So the electric power that short circuit causes must be born by iron core yoke itself and with the anchor clamps that lamination is fixed together.
The compensating power if this winding is used in the reactor, this winding can constitute according to the mode that does not have iron core.Winding only is made of a coil in this case.
It has the internal layer and the skin of semiconductive pyrolysis glass fibre according to US 5036165 known a kind of insulated electric conductors.Also knownly provide a kind of conductor that in motor, has this insulation.For example introduced in US 5066881, wherein, semiconductive pyrolysis glass layer contacts with two parallel bars that form this conductor, and the insulation in stator slot is centered on by the outer institute of semiconductive pyrolysis glass fibre.It is introduced that this pyrolysis glass fiber material suits, even this is because it also can keep its resistivity after impregnation process.
The purpose of this invention is to provide a kind of novel winding that comprises high-tension cable, be used for power transformer or be used for reactor.
And have the insulation winding the conventional electric power transformer different, this power transformer has the winding that is made of high-tension cable, it has the outer semiconducting layer of ground connection so that eliminate basically on the cable outer layer current potential and and in order to reduce capacity current.
According to the present invention by providing high-tension cable to solve the problem with grounding of this one deck with outer semiconducting layer.This winding has the distance piece of some distributions so that apply prestressing force vertically in winding, is intended to solve the electric power problem that causes because of short circuit in winding, therefore for example no longer needs to bear electrodynamic anchor clamps in transformer.
The purpose of distance piece also is to form a large amount of earth points according to the present invention, so that realize all wire turns for this winding, the effective grounding of the outer semiconducting layer of this winding.Erect image is the same in each cable, and capacity current is present in the winding of transformer.These capacity currents flow by outer semiconducting layer and voltage are distributed along semi-conductive layer.In order to reduce the voltage to the safe voltage value on outer semiconducting layer, the distance between two earth points must be short relatively.For the frequency of using in distribution (50/60 hertz), ground distance (two earth point between distance) can be up to several meters.For a task of distance piece is to be implemented in electrically contacting between the distance piece of outer semiconducting layer and ground connection.
Need short ground distance for surge voltage, transient process, this is because have high fdrequency component in potential pulse.Do not need to have special excellent contact for the needed distance piece of protecting against shock ground connection.Little air-gap between the metal part of outer semiconducting layer and distance piece is divided can allow.If surge voltage, the voltage on outer semiconducting layer (being caused by capacity current) will be very high, be enough to produce spark between the air-gap between the metal part of outer semiconducting layer and distance piece is divided.This spark then forms the ground contact between the metal part of outer semiconducting layer and distance piece is divided.
Metal part (for example being made by stainless steel) task of distance piece is to compile all earth currents by outer semiconducting layer.Therefore the good earth of winding is by realizing each distance piece ground connection.
This winding is configured mechanically compact and the even winding assembly of ground connection, makes it possible to for example electric power that causes of short circuit of bearing load, and this power can be delivered on the iron core in transformer.
The present invention also aims to be provided at the passage of the axial cylindrical shape between the every circle of winding, the distribution that cooling agent wherein can be suitable is so that satisfy various cooling requirements in winding.When coiling, can form this columniform passage by inserting distance piece.Utilize the fan sheet to realize the size of flow of coolant and definite distance piece, so that in this passage, form the flow that the cooling of satisfying each winding requires.
Another advantage of the structure of power transformer of the present invention is that winding can be assembled in advance on the cable drum of cables manufacturing factory, then at the scene around the iron core assembling.Here it is for the main improvement of the transformer manufacturing technology of these types.
The present invention relates to the winding that is used for power transformer or is used for reactor.Winding comprises can be around the high-tension cable of magnetic material iron core winding.This winding is equipped with the distance piece that some each cable wire turns of inciting somebody to action winding radially that are provided with vertically separate, so that the columniform cooling duct on forming axially.
According to one embodiment of present invention, winding disposes an axial cylindrical shape cooling duct between the every circle on another top in winding, and described passage is because the distance piece that inserts in the process of coiling forms.This embodiment also comprises and is used to carry air to pass through the fan of the passage of this axial cylindrical shape.Determine the size of each distance piece, so that according to the flow of identical pressure drop distribution cooling agent, make it possible to satisfy each axial passage cooling requirement, this is owing to be different for each winding cooling requirement.
Also dispose according to distance piece of the present invention so that winding is clamped together form a uniform winding assembly vertically, it can bear because the effect of the mechanical force that short circuit causes and the outermost ground connection coupling part that constitutes a cable.Cable according to the present invention has semi-conductive layer from the teeth outwards, this semi-conductive layer must ground connection so that be implemented in zero potential on the winding surface.This distance piece also is provided with elastic layer, to absorb the vibration that may occur in the winding.
Preferred embodiment design according to the present invention has nonvolatil distance piece, even they still are retained in the winding after coiling has been finished at winding, and also having temporary transient distance piece, they use in the process of the process operation of winding, when coiling is taken off intact man-hour.
The function that is achieved as follows of the temporary transient distance piece that each wire turn of winding is separated radially:
1) constitutes in the process of cable of a part of winding in the coiling desire, each distance piece (temporary transient distance piece and permanent distance piece) should guarantee each wire turn of winding in suitable the separating of radial direction upper edge whole circumference, though in the coiling stage because the rigidity of cable must act on sizable active force/moment.If each distance piece is got too open, then the winding wire turn is with similar polygon rather than circle.When utilization has each distance piece of little load-bearing surface, need distance piece as much as possible, otherwise distance piece should have big load-bearing surface.
2) task of nonvolatil distance piece is to maintain the interval between each winding wire turn so that make cooling agent to pass through and as far as possible effectively cooling in running.To this task, nonvolatil distance piece should so that make them itself needn't have too big cross-sectional area, therefore make the flow of coolant variation to be spaced relatively far.For the mechanical stability of winding for example because the electric power that short circuit causes only needs a spot of distance piece.
According to a preferred embodiment of the present invention, the solution of this problem is to have utilized some distance piece, some for example other distance pieces, and they are temporary, can take away after winding is made.This can realize by several modes: by the distance piece with oval cross section is provided, long axis of ellipse is in radial direction in manufacture process, and half-twist can pull it then; Or for example gas or water are expandable to utilize fluid, will extract out after assembling; Perhaps by distance piece with contractile barb etc. is provided.
In this embodiment, utilize temporary transient distance piece, and their quantity should be enough, is placed between each permanent distance piece so that prevent similar polygon of winding wire turn rather than circle with the little load-bearing surface that is pasting cable.In this embodiment, the temporary transient distance piece of big load-bearing surface is housed, utilize less, may 1 or 2 just enough.
In device according to the present invention, winding preferably belongs to and the cable corresponding type with solid-state extrusion profiled insulation that is used for distribution at present, and for example XLPE type cable perhaps has the cable that the EPR type insulate.A kind of like this cable comprise the inner conductor partly formed by one or more line thighs, around the interior semi-conductive layer of this conductor, in this semi-conductive layer solid insulating layer and around the outer semiconducting layer of this solid insulating layer.These cables are flexible, this is a kind of basic characteristic in this article, this is that wherein this winding is to utilize to need crooked conductor to realize in assembling process owing to be used for mainly being based upon a kind of like this winding system according to the technology of device of the present invention.The bending property that XLPE type cable has is for being about 20 centimetres and be about 65 centimetres for the Cable Bending Radius of 80 millimeters of diameters for the Cable Bending Radius of 30 millimeters of diameters.Under this application scenario, term " flexible " refers to down to for bending radius being 4 times of cable sizes, is preferably the 8-12 winding doubly of cable size.
Even the formation of winding should when it is bent and Dang Qi in the process of operation, can both keep its characteristic when being subjected to thermal stress.To keep being attached to each other of they be very important to each layer in this article.Here the material behavior of each layer particularly their elasticity and their relative thermal coefficient of expansions be conclusive.For example this insulating barrier is that low-density polyethylene by interlinkage constitutes in XLPE type cable, and semi-conductive layer is to be made of the polyethylene that wherein is mixed with carbon black and metallic particles.Because the fluctuation of the volume that causes of temperature fluctuation is compensated by the variation of the radius of cable fully, this is owing to the elasticity with respect to these materials, and thermal coefficient of expansion has smaller difference and can produce and radially expanded and can not make each layer loose each other.
Above-mentioned combination of materials will be understood that only as some examples.Can satisfy rated condition and satisfy the semiconductive condition that (for example, its electrical resistivity range that has is 10
-1-10
6Ohmcm, for example 1-500 ohmcm, perhaps 10-200 ohmcm) other the combination natures also fall within the scope of the invention.
This insulating barrier for example can be by for example low-density polyethylene of the thermoplastic of solid (LDPE), highdensity polyethylene (HDPE), polypropylene (PP), polybutene (PB), polymethylpentene (PMP); The material of interlinkage is the polyethylene of interlinkage (XLPE) for example; Perhaps for example ethylene-propylene rubber (EPR) or silicon rubber constitute rubber.
Interior semi-conductive layer can still wherein be mixed with conducting material granule for example carbon black or metal dust for identical base material with outer semiconducting layer.
The mechanical property of these materials particularly their thermal coefficient of expansion is subjected to relatively little influence, no matter be in order to realize that according to conductance required for the present invention at least according to required ratio, wherein mixed carbon black still is a metal dust or unmixed.Therefore insulating barrier and each semi-conductive layer have essentially identical thermal coefficient of expansion.
Vinyl-vinyl acetate copolymer/nitrile rubber, butyl grafted polyethylene, ethylene-butyl acrylate copolymer and ethylene-ethyl acrylate copolymer also can constitute the polymer that is applicable to semiconductor layer.
Even when in each layer, using dissimilar materials, wish that still their thermal coefficient of expansion is basic identical as substrate.According to above-named combination of materials a kind of example that comes to this.
Above-named material has good relatively elasticity, and its E modulus is E＜500 MPas, preferably E＜200 MPas.This elasticity is enough for the minute differences between the thermal coefficient of expansion of the layers of material that will compensate along flexible radial direction, make crackle or other defect and each layer can not appear and can be not separated from one another.Layers of material be flexible and each layer between adhesive force at least also have identical numerical value for the weakest part of various materials.
The conductance of two semi-conductive layers is enough for balanced current potential along each layer basically.The conductance of outer conducting layer wants enough big so that contain electric field in the cable, but in order not cause that owing in the caused obvious loss of electric current along the longitudinal induction of this layer, it should be enough little.
Therefore each semi-conductive layer in two semi-conductive layers constitutes an equipotential surface basically, and these layers will be enclosed in electric field therebetween basically.
Certainly can not there be any part to hinder one or more additional semi-conductive layers to be configured in the insulating barrier.
To in following introduction, illustrate in greater detail the present invention with reference to the accompanying drawings to each preferred embodiment.
Fig. 1 schematically illustrates an axial section by the transformer coil center, discloses according to the distance piece that extends axially by this coil of the present invention.
Fig. 2 represents the section according to the winding coil of distance piece of the present invention of being equipped with along the section line A-A among Fig. 1.
Fig. 3 represents corresponding another detailed section with the section shown in Fig. 1.
Fig. 4 is illustrated in the section by distance piece according to the present invention and the contacted point of cable.
Fig. 5 represents the upper end of an embodiment of distance piece.
Fig. 6 represents the lower end of an embodiment of distance piece.
Fig. 7 represents first embodiment according to temporary transient distance piece of the present invention.
Distance piece when Fig. 8 is illustrated in pressurized among Fig. 7.
Distance piece when Fig. 9 is illustrated in expansion among Fig. 7.
Figure 10 represents second embodiment according to temporary transient distance piece of the present invention.
Distance piece when Figure 11 represents to be seen by the end among Figure 10.
Figure 12 represents the 3rd embodiment according to temporary transient distance piece of the present invention.
Fig. 1 represents a sectional drawing by power transformer 1, and this transformer 1 has winding coil 2, and each winding 3 makes progress coiling by helical pattern by 4 of lower shoes.Each winding can be connected to each other, but not necessarily like this.The different windings that comprised among the embodiment shown in the figure have different cable sizes.As seeing by knowing among the figure, because the diameter of cable is not different in the cable number of turn simultaneously, each winding is equipped with each axially spaced-apart spare a, b, and c is assembled to for the axial location in the coil of each winding.Some distance pieces 8,9 are inserted in the wire turn 5,6 of each winding, between 7.Therefore first distance piece 8 is inserted between the first winding wire turn 5 and the second winding wire turn 6.Second distance piece 9 is inserted between the second winding wire turn 6 and the tertiary winding wire turn 7, or the like.Each distance piece 8,9 is fixed on the lower shoe and utilizes and relies on the clamping device 10 of going up conductive supporting plate 11 to clamp.See as knowing by Fig. 1, such as, first distance piece, 8 to the second distance pieces are thick, make to form a wideer passage between each wire turn of winding.Winding coil in transformer, constitute one with the iron core of transformer parts and do not need to utilize iron core to support independently so that compensate the mechanical force that all produces owing to short circuit.Winding construction can contact with iron core in window portion, but is not must be like this.Winding coil 2 is around iron core support arm 12, and this iron core support arm is attached in its lower end and upper end and is used for and contacted yoke 13 (not shown)s of another iron core support arm.
By the cooling duct of arranging the cooling air circulation in the inboard around each winding coil.It is different requiring for each winding cooling, this means that the flow of cooling agent is different in concentric channels.For the cooling effect that realizes that each passage is suitable, as noted above, each passage has different diameters on radially.In the scope of all passages, pressure drop is identical, so that realize desirable refrigerant distribution.This means according to the passage that directly upwards is narrower than than the low passage that cools off requirement by higher cooling requirement.In the transformer of the cable winding of being introduced, bigger distance piece is placed between the low pressure winding in this embodiment, and this winding is near iron core, rather than is placed between the high pressure winding.
Fig. 3 represents that this power transformer has support arm 12 by the axial section of a part of power transformer, has the yoke 15 of a cooling duct, and winding coil 2.First distance piece is to be made by the plastics of metal that is coated with one deck rubber 16 or reinforcement, the effect of rubber as a spring so that be suppressed at the vibrations that in winding, produce in the running.Distance piece in represented embodiment also is equipped with 1 conducting element 17 with the bright dew of bonding jumper or band sheath form in its outside, so that electrically contact with shell and winding 3 formation.Conducting element 17 also electrically contacts through earth lead 18 and last conductive supporting plate 11.Then by electric current being derived transformer by supporting bracket 11 and guiding to.Supporting bracket 11 also can be made by non-conducting material, the ground connection of using an independent lead to realize conducting element 17 in this case.Conducting element in this embodiment also is formed with an air-gap (not shown), so that transient current is guided to.The end of distance piece 8 is by the elongated hole 19 in supporting bracket 11, with clamping device 10 extensions of wedge 20 forms.Winding assembly can carry out precharge so that winding is mechanically used as an independent unit.This precharge pressure should be not more than the numerical value when making winding in place.This precharge pressure can not insulate the pressure that bears greater than the XLPE of cable.In addition, in this transformer embodiment, winding assembly can be fixed on the iron core by certain mode that is fit to.
In Fig. 3, also represented by being used at section according to the high-tension cable 111 of winding of the present invention.High-tension cable 111 comprises some such as the copper with circular cross-section (Cu) line thigh 112.These line thighs 112 are arranged in the middle part of high-tension cable 111.Around line thigh 112 are first semi-conductive layers 113.Around first semi-conductive layer 113 are for example XLPE insulation of insulating barrier 114.Around insulating barrier 114 are second semi-conductive layers 115.Therefore high-tension cable does not comprise oversheath in this application, and this oversheath is usually around this class cable that is used for distribution.The diameter range 3-250 millimeter of high-tension cable, conductive area scope be 40～3,000 square millimeter.
The ground connection of semi-conductive layer 115 is to realize by the contact between the metallic sheath 17 of second semi-conductive layer 11 and distance piece 8 under working voltage.In order to increase the contact between cable and the earth lead, this cable can be coated with one deck conductive paint in the zone of distance piece.
A preferred embodiment of expression distance piece 9 in Fig. 4.In this embodiment, distance piece 9 for example is made of stainless conductive core 25, and it is coated with an elastic layer 26 on the both sides of core body, is preferably rubber, perhaps utilizes the elastic layer around core body.This layer 26 of surface along this core body is formed with air-gap 27, so that for example can make because the transient voltage ground connection in high-tension cable 111 that lightning discharge causes.Distance piece 9 in this air-gap also is equipped with at least one earth lead 28, this earth connection is with the form of bonding jumper or metal forming in one embodiment, one end welding or be bonded on the surface of core body 25, the other end is bonded on the outer surface of elastic layer.Earth lead 28 extends by air-gap 27 and is formed on the elasticity loop feature 29 of extending in the air-gap 27, and therefore the improved contact point that is used for second semi-conductive layer, 115 ground connection is provided.This earthing conductor can also be according to the form of the elastic cylinder that is placed at the conduction in the air-gap.Other embodiment that can form the earthing conductor of Elastic Contact with second semi-conductive layer 115 also are feasible.
Fig. 7 represents first embodiment of temporary transient distance piece 50, the curvature that this distance piece has corresponding in the winding in the radius of curvature at the some place that applies this distance piece.Distance piece 50 is shaped according to a bending part and has the big contact surface that relies on cable.This distance piece also is equipped with mechanical swelling device 52, and in when operation, displacement is separately each other for two radial surfaces 53,54.Utilization realizes this displacement with independent torque force device or as the operating mechanism of the form of represented interconnective torque force device 55 on figure.When each surface was mobile in opposite directions, their length stressed to fold, and overlapping side was separately when displacement separated each other when each surface.
Fig. 8 represents to be in confined state mechanical swelling device 52 by what the end of distance piece was seen.This expander is taked the form of oval cam, tangentially is orientated on this position.
Fig. 9 represents to be in swelling state corresponding intervals part 50, is orientated radial position at oval cam.Perhaps individually or utilize public operation mechanism to rotate the rotation that each device is realized expander 52 through button or lever with manual mode, each device is interconnective, as shown in FIG. 7.
Figure 10 represents second embodiment of temporary transient distance piece 60, and the curvature that this distance piece has is corresponding to the radius of curvature at the some place that applies distance piece in the winding.This distance piece with to constitute in the similar mode of the distance piece shown in Fig. 7, but take the form of gas or liquid container.This container is equipped with fluid source adapter 62, and it is also as discharging device.Distance piece 60 is equipped with bellows 64 at its long side, enables to expand.
Figure 11 represents the distance piece 60 seen by the end, and it has three fluid sources/discharging with adapter 62, flows on request by this adapter gas or liquid.
Figure 12 schematically illustrates the 3rd embodiment of temporary transient distance piece 70.By can clearly finding out among the figure, supporting arrangement 70 only has the little stayed surface that contacts with cable.They are applied between the nonvolatil distance piece 8, support this winding during with the coiling of box lunch order.For fear of making winding become polygonal shape, tangentially four temporary transient distance pieces are placed between each nonvolatil distance piece.Each temporary transient distance piece 70 can be located under the state that has expanded, expands when in place, perhaps by radial oriented in place.Coiling winding then.After this, by compressing or turning to tangential direction temporary transient distance piece is taken away.Complete distance piece is taked oval-shaped form, and it is rotated 90 ° so that by in the distance piece it being taken off.
Though be the present invention to be introduced in conjunction with power transformer, it is applicable to distribution transformer and reactor.
Claims (28)
1. a winding (3), coil according to the winding wire turn that has diametrically a top that is positioned at another constitutes, and it is characterized in that winding (3) is made of the high-tension cable with outer semiconducting layer (115) (111), and winding (3) is configured in the distance piece (8 between the every circle of winding on having axially, 9), with winding at interval, described distance piece is equipped with at least one earth element (11 that is connected to the semi-conductive layer (115) in the high-tension cable (111), 17,18,25,28).
2. winding as claimed in claim 1 is characterized in that, distance piece (8,9) has at least one elastic layer (16,26).
3. winding as claimed in claim 2 is characterized in that, an air-gap (27) is formed between each layer or is formed within the elastic layer (16,26).
4. as described winding one of among the claim 2-3, it is characterized in that earth element (28) is equipped with a conductive elastic component (29), be used between earth element (11,17,18,25,28) and outer semiconducting layer, forming contact.
5. winding as claimed in claim 4 is characterized in that, flexible member (29) is located in the air-gap (27).
6. as described winding one of among the claim 2-3, it is characterized in that earth element (11,17,18) comprises the conducting element (17) that the outer surface with distance piece (8,9) is connected.
7. winding as claimed in claim 6 is characterized in that, conducting element (17) is made of the metal level on the surface of basic covering distance piece (8,9).
8. the described winding of arbitrary as described above claim is characterized in that, the conductive supporting plate of upwards placing through the footpath (11) that is distributed as of earth current is led to teletransmission by winding.
9. winding as claimed in claim 8 is characterized in that, supporting bracket (11) is provided with distance piece (8,9) through its several elongated holes that pass through, and being configured to of distance piece (8,9) relies on supporting bracket (11) to clamp vertically.
10. the described winding of arbitrary as described above claim is characterized in that, supporting bracket (11) footpath makes progress by the most inboard wire turn of winding (5) to the whole winding coil of outermost turns extend past.
11. the described winding of arbitrary as described above claim is characterized in that, with the zone of distance piece (8,9) contact in, the semi-conductive layer of winding (115) applies with a kind of conductive paint.
12. the method for described winding one of among manufacturing such as the claim 1-11, it is characterized in that, utilize temporary transient place along permanent distance piece (8,9) support component (50 that the tangential direction between applies, 60) support winding, support this winding during coiling with toilet when order, should take away by temporary transient support component after this.
13. method as claimed in claim 12 is characterized in that, the support component (70) with the little surface that relies on cable support is applied between the permanent partition spare (8,9).
14. method as claimed in claim 12, it is characterized in that, support component (50,60) curvature that has is corresponding to the curvature of winding and the big surface with dependence cable support, support component (50,60) be applied between the permanent distance piece (8,9), so that can when order coiling winding, support this winding.
15. as described method one of among the claim 13-14, it is characterized in that, support component (50,60,70) be make as expandable element and be compressible element after this.
16. method as claimed in claim 15 is characterized in that, support component (50,60) is radially to go up the two opposite sides (53,54) that displacement each other separates to expand.
17. method as claimed in claim 16 is characterized in that, mechanically these both sides (53,54) is pressed off and forms this displacement by using 1.
18. method as claimed in claim 17 is characterized in that, expand and coiling after, when support component (50) when taking away, cause recovering its original position owing to expander (52) pressurizes to support component (50) by winding.
19. method as claimed in claim 16 is characterized in that, support component (60) expands by inflation or topping up.
20. method as claimed in claim 19 is characterized in that, by support component (60) being compressed gas and liquid taking-up, support component (60) is taken away from winding after this.
21. a power transformer (1) or reactor comprise as described winding one of among the claim 1-11.
22. power transformer as claimed in claim 21 (1) or reactor, winding wherein with as one of in claim 12-19 described method make.
23. as described power transformer one of among the claim 21-22, it is characterized in that, winding is flexible, and winding comprises: a conductor wire core that is centered on by interior semi-conductive layer (113), insulating barrier (114) around interior half electric layer solid material, and the outer semiconducting layer (115) that centers on insulating barrier, these layers are attached to each other.
24. power transformer as claimed in claim 23, it is characterized in that, described each layer (113,114,115) is to be made of some materials with the relation between a kind of like this elasticity and their thermal coefficient of expansion, make in running because caused each layer (113 of temperature fluctuation, the fluctuation of the volume 114,115) can utilize the elasticity of material to compensate, thus in running occurrence temperature when fluctuation each layer (113,114,115) keep being attached to each other.
25. as described power transformer one of among the claim 23-24, it is characterized in that the material in described each layer (113,114,115) has high elasticity, the E-modulus less than 500 MPas for well, better less than 200 MPas.
26., it is characterized in that the material coefficient of thermal expansion coefficient in described each layer (113,114,115) becomes to have identical numerical value substantially as described power transformer one of among the claim 23-25.
27., it is characterized in that the adhesive force between described each layer (113,114,115) also has identical at least value class in the weakest part of material as described power transformer one of among the claim 23-26.
28., it is characterized in that equipotential surface of each semi-conductive layer (113,114,115) basic comprising as described power transformer one of among the claim 23-27.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9700340A SE509039C2 (en) | 1997-02-03 | 1997-02-03 | Winding for cable-wound power transformer |
| SE9700340-4 | 1997-02-03 | ||
| SE9704436A SE512060C2 (en) | 1997-02-03 | 1997-11-28 | Winding, process for making such and power transformer or reactor |
| SE9704436-6 | 1997-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1244288A true CN1244288A (en) | 2000-02-09 |
Family
ID=26662866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98801966 Pending CN1244288A (en) | 1997-02-03 | 1998-02-02 | Winding with spacers |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0956570A1 (en) |
| JP (1) | JP2001509314A (en) |
| CN (1) | CN1244288A (en) |
| AU (1) | AU5892998A (en) |
| CA (1) | CA2276349A1 (en) |
| SE (1) | SE512060C2 (en) |
| WO (1) | WO1998034248A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110853898A (en) * | 2019-11-21 | 2020-02-28 | 阳光电源股份有限公司 | Transformer and transformer processing technology |
| CN115916915A (en) * | 2021-01-11 | 2023-04-04 | 日立能源瑞士股份公司 | Spacer strip, method for producing winding and winding |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| UA45452C2 (en) | 1996-05-29 | 2002-04-15 | Абб Аб | HIGH VOLTAGE AC ELECTRIC MACHINE (OPTIONS) AND DISTRIBUTION OR MAIN NETWORK |
| KR20000016122A (en) | 1996-05-29 | 2000-03-25 | 에이비비 에이비 | Transformer/reactor |
| JP2000511395A (en) | 1996-05-29 | 2000-08-29 | アセア ブラウン ボベリ アクティエボラーグ | Rotary electrical machine with high voltage stator windings and elongated support for supporting the windings and method of manufacturing such a machine |
| SE9602079D0 (en) | 1996-05-29 | 1996-05-29 | Asea Brown Boveri | Rotating electric machines with magnetic circuit for high voltage and a method for manufacturing the same |
| SE9704413D0 (en) | 1997-02-03 | 1997-11-28 | Asea Brown Boveri | A power transformer / reactor |
| SE9704412D0 (en) | 1997-02-03 | 1997-11-28 | Asea Brown Boveri | A power transformer / reactor |
| SE510452C2 (en) | 1997-02-03 | 1999-05-25 | Asea Brown Boveri | Transformer with voltage regulator |
| SE513083C2 (en) | 1997-09-30 | 2000-07-03 | Abb Ab | Synchronous compensator system and the use of such and phase compensation method in a high voltage field |
| SE513555C2 (en) | 1997-11-27 | 2000-10-02 | Abb Ab | Method of applying a pipe means in a space of a rotating electric machine and rotating electric machine according to the method |
| GB2331853A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Transformer |
| GB2331858A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | A wind power plant |
| SE516002C2 (en) | 2000-03-01 | 2001-11-05 | Abb Ab | Rotary electric machine and method of making a stator winding |
| US6885273B2 (en) | 2000-03-30 | 2005-04-26 | Abb Ab | Induction devices with distributed air gaps |
| SE516442C2 (en) | 2000-04-28 | 2002-01-15 | Abb Ab | Stationary induction machine and cable therefore |
| ES2666328T3 (en) | 2010-07-10 | 2018-05-04 | Abb Schweiz Ag | Multi-phase dry type transformer with at least two coils |
| WO2014171031A1 (en) * | 2013-04-17 | 2014-10-23 | 三菱電機株式会社 | Reactor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB123906A (en) * | 1918-05-31 | 1919-03-13 | Brush Electrical Eng | Improvements in or pertaining to Windings in Electrical Apparatus. |
| US5036165A (en) * | 1984-08-23 | 1991-07-30 | General Electric Co. | Semi-conducting layer for insulated electrical conductors |
-
1997
- 1997-11-28 SE SE9704436A patent/SE512060C2/en not_active IP Right Cessation
-
1998
- 1998-02-02 CN CN 98801966 patent/CN1244288A/en active Pending
- 1998-02-02 WO PCT/SE1998/000178 patent/WO1998034248A1/en not_active Application Discontinuation
- 1998-02-02 CA CA002276349A patent/CA2276349A1/en not_active Abandoned
- 1998-02-02 JP JP53234698A patent/JP2001509314A/en active Pending
- 1998-02-02 EP EP98902375A patent/EP0956570A1/en not_active Withdrawn
- 1998-02-02 AU AU58929/98A patent/AU5892998A/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110853898A (en) * | 2019-11-21 | 2020-02-28 | 阳光电源股份有限公司 | Transformer and transformer processing technology |
| CN115916915A (en) * | 2021-01-11 | 2023-04-04 | 日立能源瑞士股份公司 | Spacer strip, method for producing winding and winding |
Also Published As
| Publication number | Publication date |
|---|---|
| AU5892998A (en) | 1998-08-25 |
| JP2001509314A (en) | 2001-07-10 |
| EP0956570A1 (en) | 1999-11-17 |
| WO1998034248A1 (en) | 1998-08-06 |
| CA2276349A1 (en) | 1998-08-06 |
| SE9704436L (en) | 1998-08-04 |
| SE9704436D0 (en) | 1997-11-28 |
| SE512060C2 (en) | 2000-01-17 |
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Applicant after: ABB AG Applicant before: ABB Asiya Brown Bofari Co. |
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