CN203760268U - 35kV-level oil-immersed amorphous alloy power transformer - Google Patents
35kV-level oil-immersed amorphous alloy power transformer Download PDFInfo
- Publication number
- CN203760268U CN203760268U CN201420121604.7U CN201420121604U CN203760268U CN 203760268 U CN203760268 U CN 203760268U CN 201420121604 U CN201420121604 U CN 201420121604U CN 203760268 U CN203760268 U CN 203760268U
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- China
- Prior art keywords
- coil
- iron core
- amorphous alloy
- clamping piece
- transformer
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- 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.)
- Expired - Lifetime
Links
- 229910000808 amorphous metal alloy Inorganic materials 0.000 title claims abstract description 45
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000956 alloy Substances 0.000 claims abstract description 18
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 239000011162 core material Substances 0.000 description 20
- 239000005300 metallic glass Substances 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- 229910000976 Electrical steel Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000001605 fetal effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000033764 rhythmic process Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Housings And Mounting Of Transformers (AREA)
Abstract
Disclosed is a 35kV-level oil-immersed amorphous alloy power transformer. The 35kV-level oil-immersed amorphous alloy power transformer comprises a box, wherein iron cores and coils are arranged in the box. Each iron core is an amorphous alloy iron core. The section of each iron core and the section of each coil are square. Each amorphous alloy iron core is of a three-phase, four-frame and five-legged type iron core structure. The iron cores are connected in parallel. The upper end and the lower end of each iron core are provided with an upper clamp and a lower clamp respectively. The upper clamps and the lower clamps are of a structure shaped like a Chinese character 'ji'. The upper end and the lower end of each iron core are clamped between the corresponding upper clamp and the corresponding lower clamp. Each coil penetrates through the middle of the corresponding iron core. The iron cores are hung on the coils. The upper end and the lower end of each coil are provided with insulation blocks located between the corresponding upper clamp and the corresponding lower clamp. A gap is reserved between the lower end of each coil and a lower iron yoke of the corresponding iron core. A gap is reserved between the lower end of each coil and the corresponding lower clamp. Amorphous alloy materials are applied to the 35kV transformer, and the application range of the amorphous alloy materials on transformers is largely enlarged.
Description
Technical field
The utility model relates to a kind of power transformer.
Background technology
Amorphous alloy material is a kind of novel alloy material coming out the seventies, the international advanced super chilling technique of its employing is the solid strip with the direct cooling formation thickness 0.02-0.04mm of 1 × 106 DEG C/S cooling rate by liquid metal, obtain thering is shortrange order in atomic arrangement combination, the non-crystaline amorphous metal tissue of the unordered feature of long-range, this alloy has many special performance features, as excellent magnetic, corrosion resistance, resistance to wear, high rigidity, high strength, high resistivity etc.
Amorphous alloy strips iron content 78% ~ 81%, boracic 13.5%, siliceous 3.5% ~ 8%, also containing the micro-metallic element such as nickel and cobalt, its atomic arrangement feature is to be confusing state in addition, band outer surface features is the silver gray strip with metallic luster.142,170,213mm the width that is applied at present the amorphous alloy strips in distribution field has 3 kinds:, the Main physical Performance Ratio of it and silicon steel sees the following form.
The no-load loss of transformer is mainly made up of eddy current loss and magnetic hysteresis loss, and eddy current loss is directly proportional to the thickness of core material, is inversely proportional to resistivity, and magnetic hysteresis loss is directly proportional to the area of magnetic hysteresis loop institute envelope.The thickness of amorphous alloy strips is only 27 μ m as can be seen from Table 1, it is 1/11 left and right of cold-reduced silicon sheet, resistivity is 3 times of left and right of cold-reduced silicon sheet, the iron core of therefore being made by non-crystaline amorphous metal, and the iron core that its eddy current loss is made than cold-reduced silicon sheet is much smaller.The coercive force of non-crystaline amorphous metal is less than 4A/m in addition, is 1/7 left and right of cold-reduced silicon sheet, and the area of the magnetic hysteresis loop institute envelope of non-crystaline amorphous metal is far smaller than cold-reduced silicon sheet, therefore also little a lot of than cold-reduced silicon sheet of the magnetic hysteresis loss of non-crystaline amorphous metal.In sum, amorphous alloy strips is a kind of material with excellent soft magnet performance, and the no-load loss of amorphous alloy transformer is very low, is only 25% of S9 type silicon steel transformer.
Just because of the ultralow no-load loss of Amorphous Alloy Core Transformer, the direction that Amorphous Alloy Core Transformer is become promote the use of in national grid.
But, amorphous alloy transformer compared with silicon steel transformer, the place being also weak, such as noise.The noise of transformer is mainly derived from magnetic unshakable in one's determination and encourages, and it becomes positive correlation with the magnetostriction coefficient of core material, and the saturation magnetostriction constant of non-crystaline amorphous metal is 30 × 10 as can be seen from Table 1
-6, be 3 times of left and right of cold-reduced silicon sheet, therefore the noise ratio cold-reduced silicon sheet of amorphous alloy transformer is slightly larger, and this is also that the producer that produces amorphous alloy transformer need to change the problem that a large amount of manpower and materials are captured.
Due to the following characteristic of non-crystaline amorphous metal, bring a lot of difficulties also to the Design and manufacture of amorphous alloy transformer core: 1, the much higher hard of non-crystaline amorphous metal, in manufacture, a maximum difficult problem is how to cut amorphous alloy iron core sheet.Process it with conventional cutting tool, the wear rate of cutter will be 1000 times of cutting silicon steel sheet.
2, as thin as a wafer, about 0.027mm is thick for the thickness of amorphous alloy iron core sheet, and barely 1/10th of silicon steel sheet.Material surface neither be very smooth, makes iron core with it, and activity coefficient is lower, is only 80%.3, non-crystaline amorphous metal is very responsive to mechanical stress, very easily broken after annealing.
There is now professional amorphous alloy core manufacturing firm, the amorphous alloy transformer iron core of moulding is provided for transformer factory specially, solved the difficult problem that amorphous alloy core is manufactured, transformer producer can as required, order the amorphous alloy transformer iron core of various sizes and specification.
Due to some restrictions in amorphous alloy material specification and characteristic, amorphous alloy core is only applied on the transformer of some low capacities at present, particularly on distribution transformer, has the trend at spread.The larger difficulty of applying on 35kV and above power transformer, has a lot of technical problems to need to solve.
Utility model content
The purpose of this utility model is to provide a kind of 35kV level oil immersed type non-crystalline alloy power transformer, reduces the loss of transformer.
The technical solution of the utility model is:
35kV level oil immersed type non-crystalline alloy power transformer, comprises casing, is provided with iron core and coil in casing, described iron core is amorphous alloy core, the cross sectional shape of iron core and coil is square, and amorphous alloy core is three-phase four frame five-column winding iron-core structures, adopts many groups unshakable in one's determination in parallel between iron core; The two ends up and down of described iron core are respectively equipped with upper clamping piece, lower clamping piece, and upper clamping piece, lower clamping piece are several character form structures, and the two ends up and down of described iron core are clipped between upper clamping piece, lower clamping piece; Described coil is through middle part unshakable in one's determination, described iron core hangs on coil, between the upper and lower end of described coil and upper clamping piece and lower clamping piece, be equipped with cross-over block, between the lower end of described coil and lower yoke unshakable in one's determination, be provided with gap, between coil lower end and lower clamping piece, be also provided with gap.
Coil comprises high-tension coil and low-voltage coil, is main empty path between high-tension coil and low-voltage coil, between the two ends up and down of high-tension coil and the cross-over block of a corresponding side, is respectively provided with a square square ring.
Amorphous alloy material is applied to 35kV power transformer product by the utility model, greatly expand the range of application of amorphous alloy material on transformer, and due to the ultralow no-load loss of amorphous alloy material, after the utility model application, will produce immeasurable economic benefit and social benefit, greatly reduce the power consumption of current transformer self.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model iron core;
Fig. 2 is the structural representation of fastening structure unshakable in one's determination of the present utility model;
Fig. 3 is the schematic diagram of the supporting construction of the utility model iron core;
Fig. 4 is the B-B cutaway view of Fig. 3;
Fig. 5 is the structural representation while adopting square square ring structure in transformer Main Insulation Structure of Electric;
Fig. 6 is the position view of square square ring;
Fig. 7 is the structural representation of transformer coil mold;
Fig. 8 is the A-A cutaway view of Fig. 7.
Embodiment
As shown in Figure 1,35kV level oil-filled transformer of the present utility model comprises casing 10, and the iron core 1 in casing 10 adopts amorphous alloy core.No-load loss of the present utility model only has 20 ~ 30% of common transformer product, so can greatly reduce the loss of transformer, has good energy-conserving action, has immeasurable economic benefit and social benefit.
General common transformer iron core is three-phase three-limb, and due to the restriction of amorphous alloy material production and difficulty of processing, amorphous alloy core 1 cross sectional shape of the present utility model is all square.Amorphous alloy core 1 is three-phase four frame five-column winding iron-core structures, adopts this structure can meet the needs of amorphous alloy material processing.
Current low capacity Amorphous Alloy Core Transformer is generally single group, the utility model is to increase cross section unshakable in one's determination, but is subject to the restriction of amorphous alloy material bandwidth, adopts many groups form in parallel unshakable in one's determination between unshakable in one's determination 1, mutually insulated unshakable in one's determination between every group, independent grounding.
The method for designing of existing transformer is applicable to iron core, coil is circular structure.
And that the iron core 1 of transformer of the present utility model and coil 2 are is square, existing various methods for designing are inapplicable, and the utility model adopts the method for designing of deriving equivalent circular, is applicable to square structure, and has greatly simplified and designed program.Can meet requirement.
As shown in Figure 2, the general core clamping of existing transformer is channel-section steel or plank frame, and high-low pressure folder separately.Because amorphous alloy material counter stress is more responsive, unshakable in one's determination 1 can not be stressed, and transformer need adopt new fastening structure unshakable in one's determination, avoids unshakable in one's determination stressed.Unshakable in one's determination 1 upper clamping piece 3, lower clamping piece 4 adopt several character form structures, and iron core 1 is put into upper clamping piece 3, lower clamping piece 4, can avoid so unshakable in one's determination 1 to be subject to larger clamping force.
Upper clamping piece 3, lower clamping piece 4(high-low pressure folder) be overall structure, can avoid unshakable in one's determination 1 to be subject to larger clamping force, meet the requirement that amorphous alloy core can not be stressed.
As shown in Figure 3,4, existing transformer be the structure taking iron core as skeleton, carry out fastening coil by skeleton unshakable in one's determination.
Amorphous Alloy Core Transformer is because iron core does not allow to be subject to inherent stress, so support problem unshakable in one's determination is exactly a difficult problem, through research and inquirement, the utility model hangs over iron core 1 on coil 2, can reduce the stressed of iron core 1 as far as possible.
Between upper clamping piece 3, lower clamping piece 4 and coil 2 two ends, be two cross-over blocks 5.Upper clamping piece 3 of the present utility model, lower clamping piece 4 utilize screw rod to pass through cross-over block 5 coil 2 are clamped, be placed on lower margin, like this, folder from top to bottom, coil 2, lower margin have been fixed into as a whole, and they are as a skeleton of transformer body, and 1 reversal of the natural order of things unshakable in one's determination is on coil 2, between 1 lower yoke unshakable in one's determination and coil 2, coil 2 and lower clamping piece 4, there is certain gap, can ensure that 1 unshakable in one's determination is born the weight of self, and no longer be subject to extra stress, meet the requirement that amorphous alloy core can not be stressed.
As Fig. 5, shown in 6, because higher grade of transformer voltage, the utility model adopts square square ring structure in transformer Main Insulation Structure of Electric, the above and below of coil 2 is cross-over block 5, coil 2 comprises two kinds of high-tension coil 2-1 and low-voltage coil 2-2, between high-tension coil 2-1 and low-voltage coil 2-2, it is main empty path 7, between the two ends up and down of high-tension coil 2-1 and the cross-over block 5 of a corresponding side, be respectively provided with a square square ring 6, square square ring 6 is existing equipment, adopt square square ring 6 to improve insulation property, reduce the distance of main empty path 7, reduce the cost of transformer, improve the performance of transformer.
As shown in Figure 7,8, coil 2 adopts transformer coil internal model making, and the fetal rhythm of transformer coil mold is two circular arc fetal rhythms 8, and the two ends of circular arc fetal rhythm 8 are baffle plate 9, adopt this structure to make processing, the installation of coil mold become simple and direct, convenient, met the needs that square coil is produced.
Claims (2)
1.35kV level oil immersed type non-crystalline alloy power transformer, comprise casing, in casing, be provided with iron core and coil, it is characterized in that: described iron core is amorphous alloy core, the cross sectional shape of iron core and coil is square, amorphous alloy core is three-phase four frame five-column winding iron-core structures, adopts many groups unshakable in one's determination in parallel between iron core; The two ends up and down of described iron core are respectively equipped with upper clamping piece, lower clamping piece, and upper clamping piece, lower clamping piece are several character form structures, and the two ends up and down of described iron core are clipped between upper clamping piece, lower clamping piece; Described coil is through middle part unshakable in one's determination, described iron core hangs on coil, between the upper and lower end of described coil and upper clamping piece and lower clamping piece, be equipped with cross-over block, between the lower end of described coil and lower yoke unshakable in one's determination, be provided with gap, between coil lower end and lower clamping piece, be also provided with gap.
2. 35kV level oil immersed type non-crystalline alloy power transformer according to claim 1, it is characterized in that: coil comprises high-tension coil and low-voltage coil, between high-tension coil and low-voltage coil, be main empty path, between the two ends up and down of high-tension coil and the cross-over block of a corresponding side, be respectively provided with a square square ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420121604.7U CN203760268U (en) | 2014-03-18 | 2014-03-18 | 35kV-level oil-immersed amorphous alloy power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420121604.7U CN203760268U (en) | 2014-03-18 | 2014-03-18 | 35kV-level oil-immersed amorphous alloy power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203760268U true CN203760268U (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420121604.7U Expired - Lifetime CN203760268U (en) | 2014-03-18 | 2014-03-18 | 35kV-level oil-immersed amorphous alloy power transformer |
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| Country | Link |
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| CN (1) | CN203760268U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943322A (en) * | 2014-03-18 | 2014-07-23 | 国家电网公司 | 35 kV level oil-immersed type amorphous alloy power transformer |
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2014
- 2014-03-18 CN CN201420121604.7U patent/CN203760268U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943322A (en) * | 2014-03-18 | 2014-07-23 | 国家电网公司 | 35 kV level oil-immersed type amorphous alloy power transformer |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140806 |