CN203232785U - Dry-type transformer - Google Patents

Dry-type transformer Download PDF

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Publication number
CN203232785U
CN203232785U CN 201320245068 CN201320245068U CN203232785U CN 203232785 U CN203232785 U CN 203232785U CN 201320245068 CN201320245068 CN 201320245068 CN 201320245068 U CN201320245068 U CN 201320245068U CN 203232785 U CN203232785 U CN 203232785U
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CN
China
Prior art keywords
coil
pressure winding
low pressure
dry
iron core
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Expired - Fee Related
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CN 201320245068
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Chinese (zh)
Inventor
蒋志勇
杨大勇
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Tebian Electric Apparatus Stock Co Ltd
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Tebian Electric Apparatus Stock Co Ltd
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Priority to CN 201320245068 priority Critical patent/CN203232785U/en
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Publication of CN203232785U publication Critical patent/CN203232785U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model provides a dry-type transformer, which comprises an iron core, a high-voltage winding and a low-voltage winding. The low-voltage winding is divided into a first low-voltage winding and a second low-voltage winding. The iron core is made of an amorphous alloy material. The high-voltage winding is wound on the outer side of the low-voltage winding in the radial direction of the iron core. The first low-voltage winding and the second low-voltage winding are arranged along the radial direction of the iron core. The dry-type transformer has the characteristics that the no-load loss of the transformer can be reduced, the power transmission efficiency is effectively improved, the manufacturing cost is low and the space for installation is saved.

Description

A kind of dry-type transformer
Technical field
The utility model belongs to the transformer technology field, relates to a kind of dry-type transformer, particularly a kind of photovoltaic generation dry-type transformer.
Background technology
Photovoltaic generation has from net (independent power station) and is incorporated into the power networks (civil power be incorporated into the power networks power station) two kinds of working methods, grid-connected system is that the direct current that solar panel sends is passed through header box, inverter, the direct feed-in electrical network of step-up transformer, thereby the electric energy that disperses is finally imported electrical network, realize conveying, distribution and the use of follow-up electric energy.At present, photovoltaic plant is for saving investment, saving installation space, select for use two inverters to share a two division step-up transformer mostly, this mode is compared an inverter and is joined the mode of a step-up transformer and can save the investment of nearly 50% transformer, and the installing space of transformer equipment can save near half.The outline drawing of two division step-up transformers of the iron core that Fig. 1 makes in the employing silicon steel sheet of photovoltaic plant for existing application.As shown in Figure 1, the AC low-tension electricity that two inverter inversions go out is imported respectively via the two-way low pressure winding low pressure input 1 separately of two division step-up transformers, high-voltage output end 2 outputs one tunnel by this transformer meet the high-tension electricity that is incorporated into the power networks and requires again, and the electric energy of solar panel conversion imports electrical network the most at last.Fig. 2 is the elementary diagram of this pair division dry type step-up transformer.
The rate for incorporation into the power network of photovoltaic generation is about 1.15 yuan/degree at present, is higher than common water power, the rate for incorporation into the power network of thermoelectricity far away, and therefore, the efficiency that the operator of photovoltaic plant pays close attention to each link in the photovoltaic generation more promotes.The tricklet that solar panel produces is finally compiled, is boosted and sent at the step-up transformer place after a lot of bother, therefore, transformer is the most concentrated link of electric energy of flowing through, and the lifting of this Link Efficiency is considerable for the influence of whole solar power station improved efficiency.
At present, employed pair of division step-up transformer of photovoltaic plant is traditional silicon steel plate core transformer, take the two split forms of low pressure on its structure, its shortcoming is the no-load loss height, and efficient is low, the green energy resource that a large amount of solar panels is transformed is consumed in vain and can't be brought benefits, be unfavorable for the lifting of photovoltaic generating system whole efficiency, benefit, two-way low pressure winding is arranged vertically simultaneously, and iron core is highly high, the transformer overall volume is big, and it is big to take installing space.
The utility model content
Technical problem to be solved in the utility model is at above shortcomings in the prior art, provides a kind of and can reduce transformer self no-load loss, effectively improves the dry-type transformer of power transmission efficiency.
The technical scheme that solution the utility model technical problem adopts is that this dry-type transformer comprises iron core, high pressure winding and low pressure winding, described low pressure winding is split into the first low pressure winding and the second low pressure winding, wherein, described iron core adopts amorphous alloy material to make, on described iron core radial, described high pressure winding technique is in the outside of low pressure winding, and the described first low pressure winding, the second low pressure winding are along the radial arrangement of iron core.
Wherein, mutual insulating between the described first low pressure winding and the described second low pressure winding.
Preferably, the described first low pressure winding comprises interconnected two coils, the described second low pressure winding comprises interconnected two coils, and two coils of the described first low pressure winding and two coils of the second low pressure winding spatially are the cross arrangement of X type.By two-way low pressure winding is designed to cleverly be the chi structure that the X type is arranged, makes win low pressure winding and the second low pressure winding along the iron core width of cloth to cross arrangement, thereby reduced the height of iron core and winding.
Further preferably, interconnected two coils are respectively first coil and the 4th coil in the described first low pressure winding, and interconnected two coils are respectively second coil and tertiary coil in the described second low pressure winding, wherein:
Described iron core axially on, described tertiary coil is adjacent with described first coil, described the 4th coil is adjacent with described second coil;
On described iron core radial, described second coil is positioned at the outside of described first coil, and described the 4th coil is positioned at the outside of described tertiary coil.
Preferably, described first coil is identical with the number of turn of described tertiary coil, and the number of turn of described second coil is identical with the coil turn of described the 4th coil.
Preferably, the thickness of described amorphous alloy material is 0.02-0.04mm.
Preferably, described first coil, second coil, tertiary coil and the 4th coil adopt paper tinsel around mode or the coiling of wire-wound mode.
Preferably, described high pressure winding adopts D to connect, and the described first low pressure winding and the described second low pressure winding adopt Y to connect.The low-pressure side neutral point can be drawn, and also can not draw.
Preferred described iron core adopts three-phase three-limb structure or three-phase five-limb structure.
Preferred this dry-type transformer is the dry type step-up transformer.
Further preferably, this dry-type transformer is a kind of photovoltaic generation three-phase voltage increasing transformer.
Iron core in the utility model dry-type transformer adopts amorphous alloy material to make, and the permutation and combination of the atom of non-crystaline amorphous metal material has shortrange order, the unordered characteristics of long-range, and amorphous alloy material also has the narrow and small magnetic hysteresis networking of area, and magnetic hysteresis loss is declined to a great extent; Simultaneously, because the thickness of amorphous alloy material is extremely thin, resistance is big, eddy current loss is also little, so 1/8 of no-load loss average out to silicon steel sheet transformer of amorphous alloy transformer, even compare with the core material of orientation silicon steel sheet, its no-load loss also can drop to its about 1/5, therefore, this transformer with compared by the transformer of the superimposed iron core of making of ordinary silicon steel disc, it is about 70%~80% that the no-load loss of transformer self has descended, and greatly improved power transmission efficiency, reduce energy loss, improved efficient and the benefit of photovoltaic generating system integral body.Simultaneously, on the structure of this dry-type transformer by ingenious design, give up traditional two splitted construction, two-way low pressure winding is designed to " X " chi structure, can effectively reduce the height of axially going up low pressure winding, high pressure winding and iron core, make the overall structure of transformer compacter, saved installing space, the winding filling rate is higher, and cost is more saved.
Description of drawings
The outline drawings of two division dry type step-up transformers of the iron core that Fig. 1 makes for the employing silicon steel sheet that is applied to photovoltaic plant in the prior art;
Fig. 2 is the elementary diagram of two division dry type step-up transformers among Fig. 1;
Fig. 3 is the dry-type transformer mesohigh winding of the utility model embodiment 2 and the structural representation of low pressure winding;
Fig. 4 is the elementary diagram of dry-type transformer among Fig. 3;
Fig. 5 A is the outline drawing of dry-type transformer among the utility model embodiment 2;
Fig. 5 B is the end view of Fig. 5 A;
Fig. 6 is the structural representation of iron core in the dry-type transformer of the utility model embodiment 2;
Fig. 7 A is the outline drawing of dry-type transformer among the utility model embodiment 3;
Fig. 7 B is the end view of Fig. 7 A;
Fig. 8 A is the outline drawing of dry-type transformer among the utility model embodiment 4;
Fig. 8 B is the end view of Fig. 7 A;
Fig. 9 is the structural representation of iron core in the dry-type transformer among the utility model embodiment 4.
Among the figure: 1-low pressure input; The 2-high-voltage output end; 3-high pressure winding; 4-low pressure winding; The 5-iron core; 6-first coil; 7-second coil; The 8-tertiary coil; 9-the 4th coil; The 10-first low pressure winding; The 11-second low pressure winding.
Embodiment
For making those skilled in the art understand the technical solution of the utility model better, below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Embodiment 1:
Present embodiment provides a kind of dry-type transformer, comprise iron core, high pressure winding and low pressure winding, described low pressure winding is split into the first low pressure winding and the second low pressure winding, wherein, described iron core adopts amorphous alloy material to make, on described iron core radial, described high pressure winding technique is in the outside of low pressure winding, and the described first low pressure winding, the second low pressure winding are along the radial arrangement of iron core.
Embodiment 2:
Present embodiment provides a kind of dry-type transformer, specifically is a kind of photovoltaic generation three-phase voltage increasing transformer.
As shown in Figure 3, this dry-type transformer comprises iron core 5, high pressure winding 3 and low pressure winding, and described low pressure winding is split into the first low pressure winding 10 and the second low pressure winding 11.Wherein, iron core 5 adopts amorphous alloy material to make, on iron core radial, high pressure winding 3 is wound on the outside of low pressure winding, the described first low pressure winding 10, the second low pressure winding 11 are along the radial arrangement of iron core 5, and mutual insulating between the first low pressure winding 10 and the second low pressure winding 11 does not have public point each other.
Shown in Fig. 5 A, 5B, the lead-out wire of the first low pressure winding 10 and the second low pressure winding 11 is drawn from the upper/lower terminal of the coil of transformer core the same side respectively, namely the low pressure input 1 of the first low pressure winding and the second low pressure winding lays respectively at the upper/lower terminal of the coil of transformer the same side, and the electric current that flows into the first low pressure winding 10 and the second low pressure winding 11 imports in the electrical network after the high pressure winding of this transformer boosts.
As shown in Figure 6, the iron core 5 of this dry-type transformer adopts the three-phase three-limb structure.
As shown in Figure 3, preferably, the first low pressure winding 10 comprises interconnected two coils, i.e. first coil 6 and the 4th coil 9, the second low pressure winding 11 comprises interconnected two coils, i.e. second coil 7 and tertiary coil 8, described first coil 6, the 4th coil 9, second coil 7 and tertiary coil 8 spatially are X type cross arrangement (shown in Fig. 5 A, 5B).
Particularly, iron core 5 axially on, tertiary coil 8 is adjacent with first coil 6, the 4th coil 9 is adjacent with second coil 7; On iron core 5 radial, second coil 7 is positioned at the outside of first coil 6, and the 4th coil 9 is positioned at the outside of tertiary coil 8.
Wherein, a2 and x2 are respectively two taps of the second low pressure winding 11, and a2 is on second coil 7, and x2 is on tertiary coil 8; A1 and x1 are respectively two taps of the first low pressure winding 10, and a1 is on the 4th coil 9, and x1 is on first coil 6.
Shown in Fig. 5 A, 5B, first coil 6 is connected with the 4th coil 9, second coil 7 is connected with tertiary coil 8, thereby on the longitudinal section, present the structure that " X " intersects on the first low pressure winding 10 and the second low pressure winding, 11 overall spaces, two-way low pressure winding divides along the radial of iron core 5, thereby has reduced the height of iron core 5 and whole winding.
Preferably, first coil 6 is identical with the coil turn of tertiary coil 8, and the coil turn of second coil 7 is identical with the coil turn of the 4th coil 9.Such first low pressure winding 10 is identical along the magnetic flux density of iron core 5 directions with the second low pressure winding 11.In the present embodiment, the coil turn identical (that is to say that the number of turn of first coil to the, four coils is all identical) of first coil 6 and second coil 7.
As shown in Figure 4, because high pressure winding 3 do not divide, and the low pressure winding is split into two coils, and these two coils are along the radial arrangement of iron core, thereby has reduced the height of high pressure winding 3, has increased the integral-filled coefficient of high pressure winding 3, has saved raw material.
Preferably, high pressure winding 3 adopts D to connect mode, and the first low pressure winding 10 and the second low pressure winding 11 adopt Y to connect mode respectively, and the low-pressure side neutral point can be drawn, and also can not draw.
In the present embodiment, the first low pressure winding 10 and the second low pressure winding 11 are wound on the outside of iron core 5, high pressure winding 3 is wound on the outside of the X type chi structure of the first low pressure winding 10 and the described second low pressure winding, 11 formations, and the first low pressure winding 10 equates with the capacity of high pressure winding 3 with the capacity sum of the second low pressure winding 11.
The rated capacity of this dry-type transformer can according to joining inverter capacity and decide, wherein, the electric pressure of high pressure winding can be 10kV, 35kV, and the first low pressure winding 10 is identical with the rated voltage of the second low pressure winding 11, and voltage swing is different and different according to inverter output voltage.
Preferably, first coil 6, second coil 7, tertiary coil 8 and the 4th coil 9 adopt paper tinsel around mode or wire-wound mode.
Embodiment 3:
Dry-type transformer is with the difference of embodiment 2 in the present embodiment: the lead-out wire position of low pressure winding is different.
Shown in Fig. 7 A, 7B, the lead-out wire of the first low pressure winding and the second low pressure winding is all drawn from the upper end of the coil of transformer core the same side, namely the low pressure input 1 of the first low pressure winding and the second low pressure winding is positioned at the upper end of the coil of transformer core the same side, and the electric current that flows into the first low pressure winding and the second low pressure winding imports in the electrical network after the high pressure winding of this transformer boosts.
Other structures of dry-type transformer are all identical with embodiment 2 in the present embodiment, repeat no more here.
Embodiment 4:
Dry-type transformer is with the difference of embodiment 2 in the present embodiment: the structure of iron core 5 is different.
As Fig. 8 A, 8B and shown in Figure 9, in the present embodiment, iron core 5 adopts the three-phase five-limb structure.
Other structures of dry-type transformer are all identical with embodiment 2 in the present embodiment, repeat no more here.
The utility model dry-type transformer is because the iron core that adopts amorphous alloy material to make is compared with the transformer that adopts the superimposed iron core of making of ordinary silicon steel disc, and it is about 70%~80% that the no-load loss of transformer self has descended, thereby greatly improved power transmission efficiency.Simultaneously, this transformer device structure is simple, and is easy to use, can realize that a dry-type transformer connects two inverters simultaneously, and can not produce circulation, saved installing space, reduced cost, guarantees the safe operation of electrical network.
Be understandable that above execution mode only is the illustrative embodiments that adopts for principle of the present utility model is described, yet the utility model is not limited thereto.For those skilled in the art, under the situation that does not break away from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement also are considered as protection range of the present utility model.

Claims (10)

1. dry-type transformer, comprise iron core, high pressure winding and low pressure winding, described low pressure winding is split into the first low pressure winding and the second low pressure winding, it is characterized in that, described iron core adopts amorphous alloy material to make, on described iron core radial, described high pressure winding technique is in the outside of low pressure winding, and the described first low pressure winding, the second low pressure winding are along the radial arrangement of iron core.
2. dry-type transformer according to claim 1, it is characterized in that, the described first low pressure winding comprises interconnected two coils, the described second low pressure winding comprises interconnected two coils, and two coils of the described first low pressure winding and two coils of the second low pressure winding spatially are the cross arrangement of X type.
3. dry-type transformer according to claim 2, it is characterized in that, interconnected two coils are respectively first coil and the 4th coil in the described first low pressure winding, and interconnected two coils are respectively second coil and tertiary coil in the described second low pressure winding
Described iron core axially on, described tertiary coil is adjacent with described first coil, described the 4th coil is adjacent with described second coil;
On described iron core radial, described second coil is positioned at the outside of described first coil, and described the 4th coil is positioned at the outside of described tertiary coil.
4. dry-type transformer according to claim 3 is characterized in that, described first coil is identical with the number of turn of described tertiary coil, and the number of turn of described second coil is identical with the coil turn of described the 4th coil.
5. dry-type transformer according to claim 3 is characterized in that, described first coil, second coil, tertiary coil and the 4th coil adopt paper tinsel around mode or the coiling of wire-wound mode.
6. according to the described dry-type transformer of one of claim 1~5, it is characterized in that the thickness of described amorphous alloy material is 0.02-0.04mm.
7. according to the described dry-type transformer of one of claim 1~5, it is characterized in that described high pressure winding adopts D to connect, the described first low pressure winding and the described second low pressure winding adopt Y to connect.
8. according to the described dry-type transformer of one of claim 1~5, it is characterized in that described iron core adopts three-phase three-limb structure or three-phase five-limb structure.
9. according to the described dry-type transformer of one of claim 1~5, it is characterized in that this dry-type transformer is the dry type step-up transformer.
10. according to the described dry-type transformer of one of claim 1~5, it is characterized in that this dry-type transformer is photovoltaic generation three-phase voltage increasing transformer.
CN 201320245068 2013-04-28 2013-04-28 Dry-type transformer Expired - Fee Related CN203232785U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104078215A (en) * 2014-07-15 2014-10-01 无锡亿能电力设备有限公司 Dry type power distribution split winding transformer
CN105070491A (en) * 2015-08-24 2015-11-18 宁波奥克斯高科技有限公司 Double-splitting photovoltaic variable structure
CN105186347A (en) * 2015-10-21 2015-12-23 宁波奥克斯高科技有限公司 Photovoltaic generation box transformer substation
CN109686542A (en) * 2018-12-06 2019-04-26 中铁电气化局集团有限公司 A kind of energy-economic transformer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104078215A (en) * 2014-07-15 2014-10-01 无锡亿能电力设备有限公司 Dry type power distribution split winding transformer
CN105070491A (en) * 2015-08-24 2015-11-18 宁波奥克斯高科技有限公司 Double-splitting photovoltaic variable structure
CN105186347A (en) * 2015-10-21 2015-12-23 宁波奥克斯高科技有限公司 Photovoltaic generation box transformer substation
CN109686542A (en) * 2018-12-06 2019-04-26 中铁电气化局集团有限公司 A kind of energy-economic transformer

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131009

Termination date: 20160428