CN110828143A - Low-voltage coil of capacity and voltage regulating transformer - Google Patents
Low-voltage coil of capacity and voltage regulating transformer Download PDFInfo
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- CN110828143A CN110828143A CN201911159200.0A CN201911159200A CN110828143A CN 110828143 A CN110828143 A CN 110828143A CN 201911159200 A CN201911159200 A CN 201911159200A CN 110828143 A CN110828143 A CN 110828143A
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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
- H01F27/2847—Sheets; Strips
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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
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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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
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
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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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
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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
- H01F27/2847—Sheets; Strips
- H01F2027/2857—Coil formed from wound foil conductor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention discloses a low-voltage coil of a capacity and voltage regulating transformer, which solves the problems of complex structure and low insulation safety performance in the prior art. The coil comprises cylindrical inner coils and outer coils sleeved on the peripheries of the inner coils, wherein the inner coils are formed by winding a first layer of coils, insulating paper and a second layer of coils which are sequentially attached from inside to outside. The invention has scientific and reasonable design and convenient use, and compared with the existing low-voltage coil, the structure of the invention is greatly simplified, the insulation safety performance is enhanced, the short-circuit resistance is well improved, and the integral quality of the product is greatly improved.
Description
Technical Field
The invention relates to the field of transformer coil winding, in particular to a low-voltage coil of a capacity and voltage regulating transformer.
Background
In industrial development areas, residential areas and vast rural areas of China, peak-to-valley load changes greatly, when the load is low, a transformer runs nearly in a no-load mode, so that a large part of transformer loss is no-load loss, according to statistics, the total loss of the national transformer accounts for about 10% of the generated energy of a system, and the loss of a distribution transformer accounts for about 70% of the total loss. Therefore, it is very important to reduce the loss of the distribution transformer, especially the no-load loss. However, the capacity selection of the common distribution transformer is a difficult problem, and if the capacity selection is too large, the trolley is pulled by a large horse, so that the economic benefit is reduced; if the capacity is selected too small, the small horse pulls the cart, and the power supply reliability is reduced.
The capacity regulating transformer has two capacities of large and small, can change the capacity in time according to the power load, can effectively reduce the no-load loss while improving the power supply reliability, and is effective equipment for solving the problems. The capacity regulating transformer can be roughly divided into four generations of products. The fourth generation self-adaptive load type capacity regulating transformer mainly comprises 4 parts, such as a distribution transformer body unit, an on-load capacity regulating and on-load voltage regulating switch unit, a load phase change and reactive compensation matching unit, a comprehensive control unit and the like.
The capacity regulating principle of the capacity regulating and voltage regulating transformer is as follows: as shown in fig. 4, the transformer low voltage winding is composed of a few turns I section and a plurality of turns III section. The three-phase high-voltage winding of the transformer is connected into a triangle when the capacity is large, and is connected into a star when the capacity is small. The sections II and III are connected in parallel and then connected in series with the section I when the capacity is large, and the section I is connected in series when the capacity is small. When the high capacity is adjusted to the low capacity, the number of turns of the low-voltage winding is increased, and the high-voltage winding is changed into a Y connection method.
The voltage regulating principle of the capacity and voltage regulating transformer is as follows: the voltage regulating principle of the capacity regulating transformer is shown in fig. 5, and according to the actual voltage condition, when the voltage needs to be regulated, the number of turns of a winding of a high-voltage side access circuit is changed by changing the tap position of a high-voltage winding so as to realize the voltage regulation.
From the above, the transformer needs a coil to operate, and the transformer coil is a coil, and the coil is generally divided into a layer type and a pancake type. The coil is formed by continuously winding the turns of the coil in layers in the axial direction, and is called a layer coil. Each layer is cylindrical, so that the coil has better mechanical strength, is not easy to deform and is convenient to wind. The coil composed of two layers is called double-layer cylinder type; the multilayer cylinder is composed of multiple layers.
After the turns of the coil are continuously wound in the radial direction into a coil cake (wire segment), the coil formed by arranging a plurality of coil cakes in the axial direction is called a cake-type coil. Such as continuous and intertwined coils, are the coil types. In addition to the above two coil forms, the coil interposed between the layer type and the pancake type includes a pancake type coil and a foil type coil, and the like.
The common winding characteristics and application range of the coil are mainly as follows:
(1) cylindrical coil
The cylinder type coil includes a low pressure cylinder type and a high pressure cylinder type. The low-voltage cylindrical coil is used on a low-voltage winding with the three-phase capacity of below 630kV & A and the voltage of lkV and below; the high-voltage cylindrical coil is used in a high-voltage winding with a three-phase capacity of 2500kV & A or below and a voltage class of 3-35 kV.
The coil of the low-voltage winding is formed by winding one or more flat wires in parallel. Since the more parallel wires, the less turns per layer, the poorer the fill factor of the coil, and therefore, the more the coil can be used in the transformer above 630kV · a, the foil coil can be used to improve the fill factor. The coil of the high-voltage winding is wound by a round wire or a flat wire, and when a segmented cylindrical coil is adopted, the high-voltage winding can be applied to a transformer with the capacity of 2000kV & A and below and the voltage class of 63kV and below.
The cylindrical coil is simple to wind, good in manufacturability, high in heat dissipation efficiency of the interlayer oil duct, poor in mechanical strength and generally not capable of being wound into a single layer.
(2) Spiral coil
The spiral coil is used for a low-voltage and high-current transformer winding with the three-phase capacity of more than 800kV & A and the voltage of 35kV or less. The coil of the winding is formed by winding a plurality of flat wires in parallel in a spiral shape. It has single helix, double helix, four helix, etc. Because the radial positions of the parallel wires are different and the lengths of the parallel wires are different, the wires need to be transposed in the winding process.
The spiral coil has the characteristics of simple winding process, good coil turn-to-turn heat dissipation and troublesome transposition.
(3) Continuous coil
The continuous coil is widely used because of its high mechanical strength and good heat dissipation. The method is generally applied to a winding with the capacity of 800-10000 kV & A and above and the voltage class of 35-110 kV. The high voltage and the low voltage of the coil can be adopted.
The continuous coil is formed by continuously winding one or more flat wires into a plurality of pie-shaped wire segments (30-100 wire segments) on a winding die supporting strip. The number of segments can be even (for end outgoing lines) or a multiple of 4 (middle outgoing lines). The number of parallel winding is generally less than 4, and in special cases is not more than 8. The connection between the wire segments (or called wire cakes) has no welding head, and is arranged according to the winding sequence of the wires in a natural sequence, and the connection between the wire segments is alternatively transited at the inner side and the outer side of the coil. When the coil is wound by two or more coils, the wire is transposed.
The low-voltage coil of the traditional capacity-regulating and voltage-regulating transformer adopts a wire-wound structure, the structure is complex, the insulation of a copper wire is used as the interlayer insulation between coil layers, and the insulation safety performance is low.
Therefore, designing a low-voltage coil of a capacity and voltage regulating transformer simplifies the structure of the low-voltage coil and enhances the insulation safety performance of the low-voltage coil, which is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a transfer appearance regulating transformer low-voltage coil, solve prior art structure complicacy and the low problem of insulating security performance.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a transfer appearance voltage regulating transformer low tension coil, is located including the inlayer coil and the cover that all are the cylindric inlayer coil periphery, the inlayer coil is formed by first layer coil, insulating paper and the common coiling of second floor coil from interior to exterior laminating mutually in proper order.
Furthermore, the first layer of coil and the second layer of coil are wound by copper foil.
Further, a gap is formed between the inner-layer coil and the outer-layer coil, and the gap is an oil passage of the low-voltage coil.
Furthermore, a first layer coil incoming line connecting bar and a first layer coil outgoing line connecting bar which are connected with the first layer coil, and a second layer coil incoming line connecting bar and a second layer coil outgoing line connecting bar which are connected with the second layer coil are arranged on the inner layer coil.
Further, the first layer of coil incoming line wiring row and the second layer of coil incoming line wiring row are located at the inner ring of the top of the inner layer of coils.
Further, the first layer coil outgoing line bank and the second layer coil outgoing line bank are located at the top outer ring of the inner layer coil.
Furthermore, an outer coil wire inlet wiring row and an outer coil wire outlet wiring row which are connected with the outer coil are arranged on the outer coil.
Further, the outer coil incoming line wiring row is located at the inner ring of the top of the outer coil.
Further, the outer-layer coil outgoing line bank is located at the outer ring of the bottom of the outer-layer coil.
Furthermore, the inner-layer coil is formed by winding a double-layer foil winding machine.
Compared with the prior art, the invention has the following beneficial effects:
the invention has scientific and reasonable design and convenient use, and compared with the existing low-voltage coil, the structure of the invention is greatly simplified, the insulation safety performance is enhanced, the short-circuit resistance is well improved, and the integral quality of the product is greatly improved.
The invention comprises an inner coil and an outer coil, wherein the inner coil and the outer coil are both cylindrical, the cross sections of the inner coil and the outer coil are waist-shaped elliptical rings, the outer coil is sleeved on the periphery of the inner coil, a gap is formed between the inner coil and the outer coil, the gap is an oil passage of the low-voltage coil, the inner-layer coil is formed by winding a first-layer coil, insulating paper and a second-layer coil which are sequentially attached from inside to outside together, and when winding, the first layer of coil, the insulating paper and the second layer of coil which are sequentially attached from inside to outside are fed to a double-layer foil type winding machine for winding, the first layer of coil and the second layer of coil are made of copper foils, the structure is simplified, the short-circuit resistance of the low-voltage coil can be effectively improved, the product quality of the low-voltage coil is improved on the whole, and the insulating paper is arranged between the first layer of coil and the second layer of coil at intervals, so that the insulating safety performance of the low-voltage coil is greatly enhanced.
The invention is provided with a first layer coil incoming line bank, a second layer coil incoming line bank, a first layer coil outgoing line bank, a second layer coil outgoing line bank, an outer layer coil incoming line bank and an outer layer coil outgoing line bank; and the first layer coil incoming line bank and the second layer coil incoming line bank are positioned at the top inner ring of the inner coil, the first layer coil outgoing line bank and the second layer coil outgoing line bank are positioned at the top outer ring of the inner coil, and the outer layer coil incoming line bank and the outer layer coil outgoing line bank are respectively positioned at the top inner ring and the bottom outer ring of the outer coil. By the design, the incoming and outgoing wiring of the low-voltage coil can be facilitated.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a bottom view of the present invention.
Fig. 3 is a cross-sectional view of an inner coil of the present invention.
Fig. 4 is a schematic diagram of the capacitance-adjusting voltage-regulating transformer.
Fig. 5 is a voltage regulating schematic diagram of the capacity and voltage regulating transformer.
Wherein, the names corresponding to the reference numbers are:
1-inner coil, 2-outer coil, 3-first coil, 4-insulating paper, 5-second coil, 6-oil duct, 7-first coil incoming line wiring row, 8-second coil incoming line wiring row, 9-first coil outgoing line wiring row, 10-second coil outgoing line wiring row, 11-outer coil incoming line wiring row and 12-outer coil outgoing line wiring row.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
As shown in fig. 1-3, the low-voltage coil of the capacity and voltage regulating transformer provided by the invention has the advantages of scientific and reasonable design and convenient use, compared with the existing low-voltage coil, the structure of the low-voltage coil is greatly simplified, the insulation safety performance is enhanced, meanwhile, the short-circuit resistance is well improved, and the overall quality of the product is greatly improved. The coil comprises cylindrical inner coils 1 and outer coils 2 sleeved on the peripheries of the inner coils 1, wherein the inner coils 1 are formed by winding a first layer of coils 3, insulating paper 4 and a second layer of coils 5 which are sequentially attached from inside to outside. The first layer of coil 3 and the second layer of coil 5 are both formed by winding copper foils. The inner-layer coil 1 is formed by winding a double-layer foil winding machine. A gap is formed between the inner coil 1 and the outer coil 2, and the gap is an oil passage 6 of the low-voltage coil.
A first layer coil incoming line row 7 and a first layer coil outgoing line row 9 which are connected with the first layer coil 3, and a second layer coil incoming line row 8 and a second layer coil outgoing line row 10 which are connected with the second layer coil 5 are arranged on the inner layer coil 1. The first layer coil incoming line wiring row 7 and the second layer coil incoming line wiring row 8 are located at the inner ring of the top of the inner coil 1. The first layer coil outgoing line bank 9 and the second layer coil outgoing line bank 10 are located at the top outer ring of the inner coil 1. And the outer coil 2 is provided with an outer coil wire inlet wiring row 11 and an outer coil wire outlet wiring row 12 which are connected with the outer coil 2. The outer coil wire inlet wiring row 11 is positioned at the inner ring of the top of the outer coil 2. The outer coil outgoing line terminal block 12 is positioned at the bottom outer ring of the outer coil 2.
The invention comprises an inner coil and an outer coil, wherein the inner coil and the outer coil are both cylindrical, the cross sections of the inner coil and the outer coil are waist-shaped elliptical rings, the outer coil is sleeved on the periphery of the inner coil, a gap is formed between the inner coil and the outer coil, the gap is an oil passage of the low-voltage coil, the inner-layer coil is formed by winding a first-layer coil, insulating paper and a second-layer coil which are sequentially attached from inside to outside together, and when winding, the first layer of coil, the insulating paper and the second layer of coil which are sequentially attached from inside to outside are fed to a double-layer foil type winding machine for winding, the first layer of coil and the second layer of coil are made of copper foils, the structure is simplified, the short-circuit resistance of the low-voltage coil can be effectively improved, the product quality of the low-voltage coil is improved on the whole, and the insulating paper is arranged between the first layer of coil and the second layer of coil at intervals, so that the insulating safety performance of the low-voltage coil is greatly enhanced.
The invention is provided with a first layer coil incoming line bank, a second layer coil incoming line bank, a first layer coil outgoing line bank, a second layer coil outgoing line bank, an outer layer coil incoming line bank and an outer layer coil outgoing line bank; and the first layer coil incoming line bank and the second layer coil incoming line bank are positioned at the top inner ring of the inner coil, the first layer coil outgoing line bank and the second layer coil outgoing line bank are positioned at the top outer ring of the inner coil, and the outer layer coil incoming line bank and the outer layer coil outgoing line bank are respectively positioned at the top inner ring and the bottom outer ring of the outer coil. By the design, the incoming and outgoing wiring of the low-voltage coil can be facilitated.
When the inner-layer coil is wound, a first layer of coil copper foil, insulating paper and a second layer of coil copper foil which are sequentially attached from inside to outside are firstly fed to a double-layer foil type winding machine; then, carrying out wire feeding row and copper foil welding on the first layer of coil copper foil and the second layer of coil copper foil; then starting a double-layer foil type winding machine to wind an inner-layer coil; then, carrying out wire discharging and copper foil welding on a first layer of coil copper foil and a second layer of coil copper foil in the inner-layer coil after winding; and finally, taking out the coil and carrying out quality inspection, wherein the quality inspection is qualified.
The outer coil is independently wound, and when the outer coil is wound, copper foil for winding the coil is firstly fed to a double-layer foil type winding machine; then, carrying out wire feeding row and copper foil welding on the coil copper foil; then starting a double-layer foil type winding machine to wind an outer-layer coil; then, carrying out wire outlet and copper foil welding on the wound coil; and finally, taking out the coil and carrying out quality inspection, wherein the quality inspection is qualified.
The invention has simple structure, scientific and reasonable design, convenient use, common and easily obtained manufacturing materials, simple and easily realized processing method, strong insulating property and short-circuit resistance of products, greatly improved integral quality compared with the existing low-voltage coil, and is suitable for great popularization and application in the technical field.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a transfer appearance regulating transformer low tension coil, its characterized in that is located including all being cylindric inlayer coil (1) and cover the outer coil (2) of inlayer coil (1) periphery, inlayer coil (1) is formed by first layer coil (3), insulating paper (4) and the common coiling of second layer coil (5) from interior to exterior laminating in proper order.
2. The low-voltage coil of the capacity and voltage regulating transformer as claimed in claim 1, wherein the first layer coil (3) and the second layer coil (5) are wound by copper foil.
3. A capacity-regulating and voltage-regulating transformer low-voltage coil according to claim 2, characterized in that a gap is formed between the inner coil (1) and the outer coil (2), and the gap is an oil passage (6) of the low-voltage coil.
4. A low-voltage coil of a capacity and voltage regulating transformer according to any one of claims 1 to 3, wherein a first layer coil incoming line bank (7) and a first layer coil outgoing line bank (9) connected with the first layer coil (3), and a second layer coil incoming line bank (8) and a second layer coil outgoing line bank (10) connected with the second layer coil (5) are arranged on the inner layer coil (1).
5. A capacity and voltage regulating transformer low voltage coil according to claim 4, characterized in that the first layer coil incoming line bank (7) and the second layer coil incoming line bank (8) are located at the top inner ring of the inner layer coil (1).
6. A capacity and voltage regulating transformer low-voltage coil according to claim 4, characterized in that the first layer coil outgoing line bank (9) and the second layer coil outgoing line bank (10) are located at the top outer ring of the inner layer coil (1).
7. A low-voltage coil of a capacity and voltage regulating transformer according to any one of claims 1 to 3, characterized in that an outer coil incoming line bank (11) and an outer coil outgoing line bank (12) connected with the outer coil (2) are arranged on the outer coil (2).
8. A low-voltage coil of a capacity and voltage regulating transformer according to claim 7, characterized in that the outer coil incoming line connection block (11) is located at the top inner ring of the outer coil (2).
9. A capacity and voltage regulating transformer low-voltage coil according to claim 7, characterized in that the outer coil outgoing line bank (12) is positioned at the bottom outer ring of the outer coil (2).
10. The low-voltage coil of the capacity and voltage regulating transformer as claimed in claim 1, wherein the inner coil (1) is wound by a double-layer foil winding machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911159200.0A CN110828143A (en) | 2019-11-22 | 2019-11-22 | Low-voltage coil of capacity and voltage regulating transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911159200.0A CN110828143A (en) | 2019-11-22 | 2019-11-22 | Low-voltage coil of capacity and voltage regulating transformer |
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| Publication Number | Publication Date |
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| CN110828143A true CN110828143A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911159200.0A Pending CN110828143A (en) | 2019-11-22 | 2019-11-22 | Low-voltage coil of capacity and voltage regulating transformer |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202332525U (en) * | 2011-12-07 | 2012-07-11 | 南京大全变压器有限公司 | Split type winding for transformer |
| CN202585041U (en) * | 2012-03-09 | 2012-12-05 | 中电电气(江苏)股份有限公司 | Double-layer foil winding division type winding structure |
| CN105810411A (en) * | 2016-04-27 | 2016-07-27 | 白城电力镇赉变压器有限责任公司 | Structure and process of integrally wound foil coil of low voltage winding of axial split transformer |
| CN109256267A (en) * | 2018-10-09 | 2019-01-22 | 浙江宝威电气有限公司 | A kind of foil capacity transfer winding and low pressure winding winding method for capacitance-adjustable transformer |
| CN209118902U (en) * | 2018-12-05 | 2019-07-16 | 保定保菱变压器有限公司 | A kind of rewinding material distribution transforming capacity and pressure regulating loop construction |
-
2019
- 2019-11-22 CN CN201911159200.0A patent/CN110828143A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202332525U (en) * | 2011-12-07 | 2012-07-11 | 南京大全变压器有限公司 | Split type winding for transformer |
| CN202585041U (en) * | 2012-03-09 | 2012-12-05 | 中电电气(江苏)股份有限公司 | Double-layer foil winding division type winding structure |
| CN105810411A (en) * | 2016-04-27 | 2016-07-27 | 白城电力镇赉变压器有限责任公司 | Structure and process of integrally wound foil coil of low voltage winding of axial split transformer |
| CN109256267A (en) * | 2018-10-09 | 2019-01-22 | 浙江宝威电气有限公司 | A kind of foil capacity transfer winding and low pressure winding winding method for capacitance-adjustable transformer |
| CN209118902U (en) * | 2018-12-05 | 2019-07-16 | 保定保菱变压器有限公司 | A kind of rewinding material distribution transforming capacity and pressure regulating loop construction |
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Application publication date: 20200221 |