CN220085788U - Dry-type transformer for photovoltaic power generation - Google Patents
Dry-type transformer for photovoltaic power generation Download PDFInfo
- Publication number
- CN220085788U CN220085788U CN202321708920.XU CN202321708920U CN220085788U CN 220085788 U CN220085788 U CN 220085788U CN 202321708920 U CN202321708920 U CN 202321708920U CN 220085788 U CN220085788 U CN 220085788U
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- Prior art keywords
- voltage coil
- heat dissipation
- low
- power generation
- photovoltaic power
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- 238000010248 power generation Methods 0.000 title claims abstract description 21
- 230000017525 heat dissipation Effects 0.000 claims abstract description 36
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004065 semiconductor Substances 0.000 claims abstract description 6
- 239000004744 fabric Substances 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000011889 copper foil Substances 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract 1
- 238000005057 refrigeration Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 19
- 238000009413 insulation Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Coils Of Transformers For General Uses (AREA)
Abstract
The utility model relates to a dry-type transformer for photovoltaic power generation, which comprises an iron core, a heat dissipation device arranged on the iron core, and a low-voltage coil and a high-voltage coil which are wound from inside to outside in sequence; a coaming is arranged between the low-voltage coil and the high-voltage coil; the low-voltage coil and the high-voltage coil are respectively provided with a heat dissipation air flow passage; wherein: the heat dissipation device blows cold air flow into the heat dissipation air flow channel from bottom to top so as to take away heat generated when the low-voltage coil and the high-voltage coil work. The utility model discloses an all be equipped with heat dissipation air current way cooperation constant current fan and semiconductor refrigeration piece on adopting low-voltage coil and the high-voltage coil and carry out quick cooling at the coil during operation, effectual assurance high-capacity transformer can normally be used in photovoltaic power generation field.
Description
Technical Field
The utility model relates to the technical field of transformers, in particular to a dry-type transformer for photovoltaic power generation.
Background
Driven by the global policies of low carbon emission reduction and clean energy, china has become the world first for newly increasing installed capacity and accumulating installed capacity in the photovoltaic market. With the development of higher and lower carbon emission requirements and the development of distributed power stations in the future, the photovoltaic power generation industry has more development opportunities.
However, the current large-scale photovoltaic power station uses 500kW as a basic power generation unit, the main current inverter capacity in the market is also 500kW, and for 1000kW with larger capacity, the power generation unit with 500kW is directly replaced by a double-winding 500kVA dry-type transformer due to poor heat dissipation effect, but the method is not suitable for the application of the concentrated photovoltaic power station. The present utility model has been made in view of the above circumstances, and it is an object of the present utility model to provide a dry-type transformer for photovoltaic power generation having a large capacity and a good heat dissipation effect, which solves the above-mentioned problems at a time.
Disclosure of Invention
The utility model aims to provide a dry-type transformer which can be well applied to photovoltaic power generation and has the characteristics of good heat dissipation effect, reasonable structural design and the like.
In order to realize the technical scheme, the technical scheme of the utility model is as follows: a dry-type transformer for photovoltaic power generation comprises an iron core, a heat dissipation device arranged on the iron core and a low-voltage coil and a high-voltage coil which are wound from inside to outside in sequence; a coaming is arranged between the low-voltage coil and the high-voltage coil; the low-voltage coil and the high-voltage coil are respectively provided with a heat dissipation air flow passage;
wherein: the heat dissipation device blows cold air flow into the heat dissipation air flow channel from bottom to top so as to take away heat generated when the low-voltage coil and the high-voltage coil work.
Further, the low-voltage coil adopts a plurality of coil layers wound in a layered manner in a left winding direction of copper foil, and air passage struts are uniformly arranged between the adjacent coil layers at intervals; and heat dissipation air flow channels are formed between adjacent air passage struts in a surrounding mode.
Further, the lead head part of the low-voltage coil is half-folded and wrapped with prepreg; and the outer side of the airway stay is wrapped with a layer of epoxy glass cloth plate.
Further, the spacing between adjacent airway struts is 3.5mm.
Furthermore, elliptical heat dissipation air flow passages are uniformly distributed on the high-voltage coil; the high-voltage coil is in a sectional cylindrical right winding direction.
Furthermore, the head and the tap on the high-voltage coil are covered by a glass fiber cloth double-layer half-overlapped type, and each adjacent coil is separated by insulating paper.
Further, the heat dissipation device comprises a constant-current fan; and a semiconductor refrigerating sheet is adhered to the air outlet of the constant-current fan.
Compared with the prior art, the utility model has the following beneficial effects:
1) According to the utility model, the low-voltage coil and the high-voltage coil are respectively provided with the heat dissipation air flow channel matched with the constant-current fan and the semiconductor refrigerating sheet to rapidly cool the coil when working, so that the high-capacity transformer can be effectively ensured to be normally applied to the photovoltaic power generation field;
2) The winding number of the coils is reduced by half, the assembly of the transformer is simple and convenient, and the production efficiency is greatly improved; the product has small volume, reduces the manufacturing cost and saves the installation space; the loss of the product is greatly reduced, and the energy-saving and consumption-reducing effects are obvious; the product has simple structure and convenient operation and maintenance, and effectively solves the complex structure caused by the direct connection design of the existing 500kW power generation unit and a double-winding 500kVA dry-type transformer.
Drawings
For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
FIG. 1 is a front view of a dry-type transformer of the present utility model;
FIG. 2 is a front view of the low voltage coil of the present utility model;
FIG. 3 is a top view of the low voltage coil of the present utility model;
FIG. 4 is a top view of the high voltage coil of the present utility model;
fig. 5 is a schematic view of a high voltage coil winding according to the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The present utility model will be further described in detail below with reference to the drawings and detailed description for the purpose of enabling those skilled in the art to better understand the aspects of the present utility model.
Referring to fig. 1 to 5, a dry type transformer for photovoltaic power generation includes an iron core 1, a low voltage coil 2, a high voltage coil 3, a coaming 4, and a heat sink 6. Wherein: the low-voltage coil 2 and the high-voltage coil 3 are three-phase and are sequentially wound on the iron core (1) from inside to outside; a coaming 4 is inserted between the high-voltage coils 3 between the adjacent low-voltage coils 2; the low-voltage coil (2) and the high-voltage coil (3) are respectively provided with a heat dissipation air flow passage (5); a heat dissipation device 6 is arranged below the low-voltage coil (2) and the high-voltage coil (3); wherein: the heat dissipation device (6) is used for blowing cold air flow into the heat dissipation air flow channel (5) from bottom to top so as to take away heat generated when the low-voltage coil (2) and the high-voltage coil (3) work. In this embodiment, through continuous to heat dissipation air current (5) of blowing into of heat abstractor (6) to drive the heat that low-voltage coil (2) and high-voltage coil (3) work produced, guarantee 1000kW of large capacity can timely heat dissipation at the during operation. The low-voltage coil 2, the high-voltage coil 3, the coaming 4 and the heat sink 6 will be described in detail.
On the basis of the embodiment, the low-voltage coil 2 is a multi-layer coil wound coaxially, 4 turns are preferably adopted in the embodiment, each layer of turns is three turns, interlayer insulation 23 is arranged between each layer of turns, so that the low-voltage coil 2 has an optimal structural design under the condition of enough large capacity, is convenient to assemble and produce, is wound by copper foil 24, is wound in each layer of turns 1, is wound left, and is half-folded at the lead head part and is 15mm long in length of 100 mm. Airway struts 21 are uniformly arranged between the adjacent multi-layer coil layers at intervals; and heat dissipation air flow passages 5 are formed between the adjacent air passage stay 21 in a surrounding mode. The airway stay 21 is uniformly spaced by 3.5mm, and the outer side of the airway stay is fixed by a fastening belt 26 to form a 0.5-thick epoxy glass cloth plate 25. The transition of the copper foil from the inner layer to the outer layer during the winding process may be without the placement of airway struts. The low-voltage coil 2 is outermost-layer-wrapped around the top insulation 22, and is four-layer-reinforced insulation (insulating paper). And the two ends of the output adopt an inner copper bar 27 and an outer copper plate 28 which are arranged in parallel to extend to the top along the vertical direction, and the two ends are fixedly connected through a block terminal.
On the basis of the embodiment, elliptical heat dissipation air flow passages 5 are uniformly distributed on the high-voltage coil 3; the high-voltage coil 3 is wound in a right-hand direction in a sectional cylindrical manner, specifically, the high-voltage coil 3 is wound in a right-hand direction in a sectional cylindrical manner, after the sections 2 and 4 are sequentially wound, the coils are wound in sections 3 and 1 after turning around; the two layers of the double-layer half-overlapped package 2 of 0.2x25 glass fiber cloth are used for the head and the tap, each wire turn adjacent to the head and the tap is separated by 0.2x60-80 DMD, the outgoing wire and the tapping wire are led out from the original wire in a radial direction, the length of the outgoing wire is 200, and the outgoing wire and the tapping wire are welded with the terminal of the item 5; when in coiling, firstly, coiling 2 layers of 1 grid cloth on the inner die, then coiling electromagnetic wires, coiling two layers of 7 grid cloth on the outermost layer, and lifting the inner and outer grid cloth and making the joint of the inner and outer grid cloth 5mm; after the coil winding is finished, the grid cloth surplus material is used as a cushion block to be tightly inserted between sections to be used as section (end) insulation, the insulation is uniformly distributed at 60 degrees, and finally resin is poured, solidified and the insulation treatment is enhanced at the transition line position of the rising layer. In the present embodiment, the high-voltage coil 3 is connected in a three-phase D-connection manner, and the total number of turns 546 of the coil is divided into 4 layers, which are E137, F136, G136, and H137, respectively, and the insulation pitches between adjacent turns are 0.2mm.
On the basis of the embodiment, the heat dissipation device 6 comprises a constant-current fan; a semiconductor refrigerating sheet is adhered to the air outlet of the constant-current fan; the specific semiconductor refrigerating sheet can cool peripheral air flow to reduce temperature after a circuit is connected, then the constant-current fan starts to fix the air flow downwards and upwards, so that the cold air flow is convenient to take out heat, and in order to ensure that the air flow stays in the heat dissipation air flow channel 5 for a longer time, a protruding spiral protruding part is arranged on the inner side of the heat dissipation air flow channel 5 in the embodiment, and the air flow entering during the process flows in the inner side of the heat dissipation air flow channel 5 in a spiral direction, so that the whole stay time is prolonged, and the heat dissipation effect is improved.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.
Claims (7)
1. A dry-type transformer for photovoltaic power generation comprises an iron core (1), a heat dissipation device (6) arranged on the iron core (1), and a low-voltage coil (2) and a high-voltage coil (3) which are wound from inside to outside in sequence; the method is characterized in that: a coaming (4) is arranged between the low-voltage coil (2) and the high-voltage coil (3) which are adjacent; the low-voltage coil (2) and the high-voltage coil (3) are respectively provided with a heat dissipation air flow passage (5);
wherein: the heat dissipation device (6) blows cold air flow into the heat dissipation air flow channel (5) from bottom to top to take away heat generated when the low-voltage coil (2) and the high-voltage coil (3) work.
2. A dry-type transformer for photovoltaic power generation according to claim 1, wherein: the low-voltage coil (2) adopts a plurality of coil layers wound in a layered manner in a left winding direction of copper foil, and airway struts (21) are uniformly arranged between the adjacent coil layers at intervals; and a heat dissipation air flow passage (5) is enclosed between the adjacent air passage stay (21).
3. A dry type transformer for photovoltaic power generation according to claim 2, wherein: the lead head part of the low-voltage coil (2) is half-folded and wrapped with prepreg; and the outer side of the airway stay (21) is wrapped with a layer of epoxy glass cloth plate.
4. A dry-type transformer for photovoltaic power generation according to claim 3, wherein: the distance between the adjacent airway stays (21) is 3.5mm.
5. A dry-type transformer for photovoltaic power generation according to claim 1, wherein: elliptical heat dissipation air flow passages (5) are uniformly distributed on the high-voltage coil (3); the high-voltage coil (3) is in a sectional cylindrical right winding direction.
6. A dry-type transformer for photovoltaic power generation according to claim 5, wherein: the head and the tap on the high-voltage coil (3) are covered by a glass fiber cloth double-layer half-overlapping type, and each adjacent coil is separated by insulating paper.
7. A dry-type transformer for photovoltaic power generation according to claim 1, wherein: the heat dissipation device (6) comprises a constant-current fan; and a semiconductor refrigerating sheet is adhered to the air outlet of the constant-current fan.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2023205643736 | 2023-03-21 | ||
| CN202320564373 | 2023-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220085788U true CN220085788U (en) | 2023-11-24 |
Family
ID=88817010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321708920.XU Active CN220085788U (en) | 2023-03-21 | 2023-07-03 | Dry-type transformer for photovoltaic power generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220085788U (en) |
-
2023
- 2023-07-03 CN CN202321708920.XU patent/CN220085788U/en active Active
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