CN207572220U - Quadripartion combined transformer - Google Patents
Quadripartion combined transformer Download PDFInfo
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- CN207572220U CN207572220U CN201721725747.9U CN201721725747U CN207572220U CN 207572220 U CN207572220 U CN 207572220U CN 201721725747 U CN201721725747 U CN 201721725747U CN 207572220 U CN207572220 U CN 207572220U
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- low pressure
- winding
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- quadripartion
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Abstract
The utility model provides a kind of quadripartion combined transformer, belong to transformer technology field, including three-phase three-limb the first device body and the second device body being arranged in same fuel tank, coiling low pressure winding structure and high-voltage winding structure successively from the inside to the outside on each stem of the iron core of first device body and the second device body, high-voltage winding structure is axially subdivided into the first high-voltage winding and the second high-voltage winding, low pressure winding structure is split into the first low pressure winding and the second low pressure winding in an axial direction, and the low pressure winding structure of the first device body and the second device body is split into four tunnels altogether；The high-voltage output end of first device body and the second device body connects for D, the three-phase high-voltage output terminal Parallel opertation of the first device body and the second device body, and the low-voltage output of the first device body and the second device body connects for y.The division impedance of the utility model is high and safe and reliable, transformer capacity is big, compact-sized, and height and the width reduce, and is more applicable for limiting the occasion for having particular requirement outside height and the width.
Description
Technical field
The utility model belongs to transformer technology field, is to be related to a kind of quadripartion combined transformer more specifically.
Background technology
Combined transformer has the characteristics that a Two-level ensemble degree is high, easy to install and use, safe and reliable, except matching in city
Electrical domain has extensive application outer, and the relevant technologies be transplanted to field of photovoltaic power generation in recent years.With the development of technology, Ren Men
Higher generating efficiency is constantly pursued, one of realization means are to divide combined transformer using large capacity more, existing
Low pressure quadripartion transformer technology has following three kinds：
The first is low pressure axial direction quadripartion formula, as shown in figure 3, (being divided by iron core 5, the 5th high-voltage winding 6, low pressure winding
Wei third low pressure winding 33, the 4th low pressure winding 34, the 5th low pressure winding 35, the 6th low pressure winding 36) composition.High-voltage winding
It is wound on iron core with low pressure winding, high pressure is overall structure, and on the inside of low pressure winding, low pressure winding is split into four parts：
Third low pressure winding 33, the 4th low pressure winding 34, the 5th low pressure winding 35, the 6th low pressure winding 36 are evenly arranged along the axial, this
It is a kind of most common technology.This divisional mode has the disadvantage that：First, since high-voltage winding is located inside, shunting tap
Complex process is drawn, increases the probability to go wrong, additionally, due to high-voltage winding close to iron core, the insulation distance needed is big, makes
Increase into loss；2nd, since insulation and structure are needed there is provided clearance for insulation between four low pressure windings of division, and high voltage winding
Group is an entirety, this has resulted in ampere-turn imbalance, on the one hand increases supplementary transformer loss, when on the other hand making short circuit
The short-circuit force of generation increases, and influences the security and stability of transformer；3rd, four low pressure windings the location of in stray field no
Together, it is caused respectively to the impedance unbalance of high pressure, and when operation can cause the imbalance of output voltage, can influence to become when serious
The normal operation of depressor；4th, this split form can cause transformer body to be highly significantly increased, and stability accordingly reduces, right
It can even exceed the outer limit of transport in the product of large capacity.
Second of split form for axial direction double bundle+radial staggeredly division, as shown in figure 4, by iron core 5, high-voltage winding
(being respectively third high-voltage winding 23, the 4th high-voltage winding 24), low pressure winding (are respectively the 7th low pressure winding 37, the 8th low pressure
Winding 38, the 9th low pressure winding 39, the tenth low pressure winding 40) composition.It is counted from iron core, low pressure winding, height is followed successively by along radial
Winding is pressed, high-voltage winding two-way is in parallel, is divided axially into 23 and 24, low pressure winding is split into 4, and four low pressure windings are divided into two
38 1 groups of group, the 7th low pressure winding 37 and the 8th low pressure winding, nineth low pressure winding corresponding with third high-voltage winding 23 in axial direction
39 and 40 1 groups of the tenth low pressure winding, it is corresponding with the 4th high-voltage winding 24 in axial direction.Two low pressure winding parts in each group, i.e.,
7th low pressure winding 37 and the 8th low pressure winding 38, the 9th low pressure winding 39 and the tenth low pressure winding 40 overlap coiling, electrically
Mutual insulating.This split form reduces the height of transformer, and ampere-turn equilibrium is good, but still defective：Greatest drawback is radial
Division impedance between two low pressure staggeredly divided is too small, i.e. the 7th low pressure winding 37 and the 8th low pressure winding 38, the 9th low pressure
Between 39 and the tenth low pressure winding 40 of winding, since its coupling belongs to close-coupled, the division impedance between them is very small, deviates from
The requirement of high division impedance, it is to split operation unfavorable.Another defect is due to two low pressure windings of radial staggeredly division
Impedance unbalance is passed through under two 1/4 capacity along radial caused without transposition, causes the unbalanced of output voltage.
The third mode is second of evolutionary approach, as shown in figure 5, (being respectively the 6th high by iron core 5, high-voltage winding
Press winding 25, the 7th high-voltage winding 26), low pressure winding (be respectively the 11st low pressure winding 311, the 12nd low pressure winding 312,
13rd low pressure winding 321, the 14th low pressure winding 322, the 15th low pressure winding 331, the 16th low pressure winding the 332, the tenth
Seven low pressure windings 341, the 18th low pressure winding 342) composition.It is counted from iron core, low pressure winding, high voltage winding is followed successively by along radial
Group, high-voltage winding two-way is in parallel, is divided axially into the 6th low pressure winding 25 and the 7th high-voltage winding 26, and low pressure winding is split into 8,
8 low pressure windings are divided into two groups, the 11st low pressure winding 311, the 12nd low pressure winding 312, the 13rd low pressure winding 321,
14 322 1 groups of low pressure windings, it is corresponding with the 6th high-voltage winding 25 in axial direction, the 15th low pressure winding 331, the 16th low pressure around
Group the 332, the 17th low pressure winding 341 and 342 1 groups of the 18th low pressure winding, it is corresponding with the 7th high-voltage winding 26 in axial direction；Spoke
Coordinated transposition has been carried out radial to two low pressure windings of staggeredly division, resistance is passed through under two 1/4 capacity although solving
The problem of anti-unbalance, but also bring the problems such as such as technique for coiling is complicated and ampere-turn is uneven.Moreover, radial staggeredly divide
Two low pressure between division impedance it is less than normal the problem of still without solution.
There is the transformer of special outer limit requirement for some, particularly have what is strictly limited to width and height, due to skill
The problem of art scheme is intrinsic causes three of the above low pressure quabernary fission depressor to there is the risk to transfinite.
Utility model content
It is in the prior art to solve the purpose of this utility model is to provide a kind of quadripartion combined transformer
1/4 capacity passes through the technical issues of impedance consistency is poor, division impedance is less than normal, transformer body transfinites.
To achieve the above object, the technical solution adopted in the utility model is：A kind of quadripartion combined transformer is provided,
Including fuel tank and structure identical the first device body and the second device body, the first device body and the second device body are arranged in fuel tank,
The first device body and the second device body are three-phase three-limb, and the iron core of the first device body and the second device body includes three cores
Column, coiling low pressure winding structure and high-voltage winding structure successively from the inside to the outside on each stem, the high-voltage winding structure and low
Winding construction concentric arrangement is pressed, the high-voltage winding structure is axially subdivided into the first high-voltage winding and second for waiting the numbers of turn such as capacity
High-voltage winding, the low pressure winding structure are split into the first low pressure winding and the second low pressure winding, first low pressure in an axial direction
Winding and the second low pressure winding are along radial corresponding with the first high-voltage winding and the second high-voltage winding respectively, first high voltage winding
It is exported after group and the second high-voltage winding parallel connection；The low pressure winding structure of the first device body and the second device body is split into four tunnels altogether；
The connection mode of every phase high-voltage output end of the first device body and the second device body and other two-phase high-voltage output ends
It is connect for D, the three-phase high-voltage output terminal Parallel opertation of the first device body and the second device body, the first device body and the second device body
Low pressure output connection mode connects for y.
Further, every phase high-voltage output end of the first device body and the second device body connect backup type fuse and insert
Enter formula fuse.
Further, the three-phase output end of the first device body and the second device body is connected after corresponding to parallel connection with on-load switch.
Further, the first device body and the second device body are disposed in parallel in fuel tank.
Further, it is connected between the first device body and the second device body by core clamping.
Further, the fuel tank is vacuum formula fuel tank.
Further, the bearing capacity of gilled radiator is in the fuel tank and fuel tank：Positive pressure 100kPa, negative pressure 133Pa.
Further, the top of oil-tank is filled with drying nitrogen.
Further, the high-voltage winding structure of the first device body and the second device body shares a tap switch.
The advantageous effect of quadripartion combined transformer provided by the utility model is：Compared with prior art, this reality
Pass through that impedance consistency is good, division impedance is high with 1/4 novel capacity and it is safe and reliable, transformer capacity is big, rated capacity can
To be increased to the two of the prior art times；Overall structure is simplified, compact simultaneously, and reliability is high, whole height and the more existing skill of width
Art decreases, and is more applicable for limiting the occasion for having particular requirement outside height and the width.The utility model is applied to photovoltaic
Power station can be used cooperatively with four inverters, not only increased power transformation efficiency, also greatly reduced the floor space of transformer,
Save investment.
Description of the drawings
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing is briefly described needed in description, it should be apparent that, the accompanying drawings in the following description is only that this practicality is new
Some embodiments of type, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the connection principle of quadripartion combined transformer mesohigh winding construction that the utility model embodiment provides
Figure；
Fig. 2 is the elementary diagram of single stem in the quadripartion combined transformer that the utility model embodiment provides；
Fig. 3 is the elementary diagram of low pressure axial direction quabernary fission depressor in the prior art；
Fig. 4 is the elementary diagram of axial direction double bundle+radial staggeredly transformer with split winding in the prior art；
Fig. 5 is the elementary diagram of radial staggeredly transformer with split winding in the prior art；
Wherein, each reference numeral in figure：
I- the first device bodies, II- the second device bodies；1- backup type fuses, 2- pull-out fuses, 3- on-load switches, 4- cores
Column, the first high-voltage windings of 21-, the second high-voltage windings of 22-, the first low pressure windings of 31-, the second low pressure windings of 32-；5- iron cores, 6-
5th high-voltage winding, 33- third low pressure windings, the 4th low pressure windings of 34-, the 5th low pressure windings of 35-, the 6th low pressure windings of 36-；
23- third high-voltage windings, the 4th high-voltage windings of 24-, the 7th low pressure windings of 37-, the 8th low pressure windings of 38-, the 9th low pressure of 39- around
Group, the tenth low pressure windings of 40-；The 6th high-voltage windings of 25-, the 7th high-voltage windings of 26-, the 11st low pressure windings of 311-, 312-
12 low pressure windings, the 13rd low pressure windings of 321-, the 14th low pressure windings of 322-, the 15th low pressure windings of 331-, 332-
16 low pressure windings, the 17th low pressure windings of 341-, the 18th low pressure windings of 342-.
Specific embodiment
In order to which technical problem to be solved in the utility model, technical solution and advantageous effect is more clearly understood, with
Lower combination accompanying drawings and embodiments, the present invention is further described in detail.It should be appreciated that specific reality described herein
It applies example to be only used to explain the utility model, is not used to limit the utility model.
It should be noted that when element is referred to as " being fixed on " or " being set to " another element, it can be directly another
On one element or it is connected on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", " on ", " under ", "front", "rear", "left", "right", " vertical ",
The orientation or position relationship of the instructions such as " level ", " top ", " bottom " " interior ", " outer " are to be closed based on orientation shown in the drawings or position
System is for only for ease of description the utility model and simplifies description rather than instruction or imply that signified device or element are necessary
With specific orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature." multiple " are meant that two or two in the description of the present invention,
More than, unless otherwise specifically defined.
Also referring to Fig. 1,2, now quadripartion combined transformer provided by the utility model is illustrated.Described four
Combined transformer is divided, including the first identical device body I of fuel tank and structure and the second device body II, the first device body I and the
Two device body II are arranged in fuel tank, and the first device body I and the second device body II are three-phase three-limb, the first device body I
Include three stems 4 with the iron core of the second device body II, coiling low pressure winding structure and height successively from the inside to the outside on each stem 4
Winding construction is pressed, the high-voltage winding structure and low pressure winding structure concentric arrangement, the high-voltage winding structure are axially subdivided into
The first high-voltage winding 21 and the second high-voltage winding 22 of the numbers of turn such as capacity are waited, the low pressure winding structure is split into first in an axial direction
31 and second low pressure winding 32 of low pressure winding, 31 and second low pressure winding 32 of the first low pressure winding is along radial respectively with first
21 and second high-voltage winding 22 of high-voltage winding is corresponding, defeated after 21 and second high-voltage winding of the first high-voltage winding, 22 parallel connection
Go out；The low pressure winding structure of the first device body I and the second device body II are split into four tunnels altogether；
Wherein, every phase high-voltage output end of the first device body I and the second device body II and other two-phase high-voltage output ends
Connection mode connects for D, the three-phase high-voltage output terminal of the first device body I and the second device body II Parallel opertation two-by-two again, and described
The connection mode of the low-voltage output of one device body I and the second device body II connects for y.
Quadripartion combined transformer provided by the utility model compared with prior art, has the advantages that following：
First, it is good to pass through impedance consistency for 1/4 capacity：Four low pressure windings are identical, the phases in stray field
It is identical or symmetrical to position, the consistency that four 1/4 capacity pass through impedance can be effectively ensured, so as to ensure output voltage
Balance.
2nd, division impedance is high, securely and reliably：Close-coupled is not present between four low pressure, it is ensured that larger division
Impedance meets the performance requirement of transformer with split winding, is conducive to transformer split operation.
3rd, the bigger that combined transformer capacity can be done, rated capacity can be increased to two times of the prior art.
4th, transformer height and the width decrease compared with the prior art, are more applicable for having to limiting outside height and the width
The occasion of particular requirement.
5th, transformer body overall structure is simplified, compact, and reliability is high.
The utility model, which is applied to photo-voltaic power generation station, to be used cooperatively with four inverters, not only increase power transformation efficiency,
The floor space of transformer is also greatly reduced, saves investment.
Further, referring to Fig. 1, a kind of specific reality as quadripartion combined transformer provided by the utility model
Apply mode, every phase high-voltage output end of the first device body I and the second device body II connects backup type fuse 1 and plug-in type melts
Disconnected device 2.Using backup type fuse and pull-out fuse as protection element.Backup type fuse and pull-out fuse string
It is coupled in high-voltage connection, since backup type fuse and pull-out fuse have certain ampere-time characteristic, type selecting is big by electric current
Small selection, it is associated with transformer capacity, voltage, short-circuit impedance.At present, due to being limited by fuse type selecting, combined variable
The generally not super 3200kVA (rated voltage 35kV, short-circuit impedance 5.75%) of depressor capacity.
Further, referring to Fig. 1, a kind of specific reality as quadripartion combined transformer provided by the utility model
Mode is applied, is connected after the three-phase output end correspondence parallel connection of the first device body I and the second device body II with on-load switch 3, and through set
Pipe is drawn.
Wherein, the high-voltage winding structure of the first device body and the second device body shares a tap switch.
Further, in a specific embodiment of the utility model, the first device body I and the second device body II are arranged side by side
It is arranged in fuel tank.And it is connected between the first device body I and the second device body II by core clamping.
In installation process, the iron core of the first device body and the second device body is first subjected to singlecore stack, after clamper for iron core standing, then
Two iron cores are combined into one by bolt core clamping, improve stack efficiency.
Further, a kind of specific embodiment as quadripartion combined transformer provided by the utility model, institute
Fuel tank is stated using vacuum formula fuel tank.Wherein, cooler uses gilled radiator in transformer, chip in the fuel tank and fuel tank
The bearing capacity of radiator is：, there is not the permanent deformation not allowed in positive pressure 100kPa, negative pressure 133Pa.
Further, a kind of specific embodiment as quadripartion combined transformer provided by the utility model, institute
Top of oil-tank is stated filled with drying nitrogen, without using oil conservater, copes with the volume change that transformer oil is varied with temperature and generated.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (9)
1. quadripartion combined transformer, it is characterised in that：Including fuel tank and structure identical the first device body and the second device body,
The first device body and the second device body are arranged in fuel tank, and the first device body and the second device body are three-phase three-limb, institute
The iron core for stating the first device body and the second device body includes three stems, coiling low pressure winding knot successively from the inside to the outside on each stem
Structure and high-voltage winding structure, the high-voltage winding structure and low pressure winding structure concentric arrangement, the high-voltage winding structure is along axis
To being divided into the first high-voltage winding and the second high-voltage winding that wait the numbers of turn such as capacity, the low pressure winding structure is split into the in an axial direction
One low pressure winding and the second low pressure winding, first low pressure winding and the second low pressure winding along it is radial respectively with the first high voltage winding
Group is corresponding with the second high-voltage winding, is exported after first high-voltage winding and the second high-voltage winding parallel connection；The first device body
It is split into four tunnels altogether with the low pressure winding structure of the second device body；
The connection mode of every phase high-voltage output end of the first device body and the second device body and other two-phase high-voltage output ends is D
Connect, the three-phase high-voltage output terminal Parallel opertation of the first device body and the second device body, the first device body and the second device body it is low
Pressure output terminal connection mode connects for y.
2. quadripartion combined transformer as described in claim 1, it is characterised in that：The first device body and the second device body
It connects backup type fuse and pull-out fuse per phase high-voltage output end.
3. quadripartion combined transformer as claimed in claim 2, it is characterised in that：The first device body and the second device body
Three-phase output end is connected after corresponding to parallel connection with on-load switch.
4. quadripartion combined transformer as described in claim 1, it is characterised in that：The first device body and the second device body are simultaneously
Row are arranged in fuel tank.
5. quadripartion combined transformer as claimed in claim 4, it is characterised in that：The first device body and the second device body it
Between be connected by core clamping.
6. such as claim 1-5 any one of them quadripartion combined transformers, it is characterised in that：The fuel tank is vacuum
Formula fuel tank.
7. quadripartion combined transformer as claimed in claim 6, it is characterised in that：Chip radiates in the fuel tank and fuel tank
The bearing capacity of device is：Positive pressure 100kPa, negative pressure 133Pa.
8. quadripartion combined transformer as claimed in claim 7, it is characterised in that：The top of oil-tank is filled with dry nitrogen
Gas.
9. quadripartion combined transformer as claimed in claim 6, it is characterised in that：The first device body and the second device body
High-voltage winding structure shares a tap switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721725747.9U CN207572220U (en) | 2017-12-12 | 2017-12-12 | Quadripartion combined transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721725747.9U CN207572220U (en) | 2017-12-12 | 2017-12-12 | Quadripartion combined transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207572220U true CN207572220U (en) | 2018-07-03 |
Family
ID=62686807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721725747.9U Active CN207572220U (en) | 2017-12-12 | 2017-12-12 | Quadripartion combined transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207572220U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808760A (en) * | 2017-12-12 | 2018-03-16 | 保定天威集团特变电气有限公司 | Quadripartion combined transformer |
| CN107808760B (en) * | 2017-12-12 | 2024-05-17 | 保定天威集团特变电气有限公司 | Four-split combined transformer |
-
2017
- 2017-12-12 CN CN201721725747.9U patent/CN207572220U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808760A (en) * | 2017-12-12 | 2018-03-16 | 保定天威集团特变电气有限公司 | Quadripartion combined transformer |
| CN107808760B (en) * | 2017-12-12 | 2024-05-17 | 保定天威集团特变电气有限公司 | Four-split combined transformer |
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