CN109686542A - A kind of energy-economic transformer - Google Patents
A kind of energy-economic transformer Download PDFInfo
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- CN109686542A CN109686542A CN201811486506.2A CN201811486506A CN109686542A CN 109686542 A CN109686542 A CN 109686542A CN 201811486506 A CN201811486506 A CN 201811486506A CN 109686542 A CN109686542 A CN 109686542A
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- winding
- pressure subsidiary
- lower pressure
- energy
- higher pressure
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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
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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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/404—Protective devices specially adapted for fluid filled transformers
Abstract
The embodiment of the present invention provides a kind of energy-economic transformer, including iron core, low pressure winding and high-voltage winding；Wherein, for any phase of energy-economic transformer, the low pressure winding is formed by lower pressure subsidiary windings in series, and the high-voltage winding is formed by higher pressure subsidiary windings in series；The quantity at least two of the quantity of the lower pressure subsidiary winding and the higher pressure subsidiary winding；The lower pressure subsidiary winding and the higher pressure subsidiary winding arranged concentric are around the iron core, also, the lower pressure subsidiary winding and the higher pressure subsidiary winding are staggered.The embodiment of the present invention by by arranged concentric around iron core, staggered lower pressure subsidiary winding and higher pressure subsidiary winding distinguish low pressure winding in series and high-voltage winding, width is increased to leakage field group pair, micro- reactive loss when transformer operates normally may be implemented, while improving voltage regulation factor；Structure is simple, manufacturing process is reasonable.
Description
Technical field
The present embodiments relate to transformer technology fields, and in particular to a kind of energy-economic transformer.
Background technique
According to relevant criterion, the short-circuit impedance and associate power parameter of transformer have following relationship:
(1) relationship of short-circuit impedance and short circuit current
When short circuit occurs in transformer load, short-circuit impedance is small, and short circuit current is big, and the electric power that transformer is born is big；It is short
Roadlock is anti-big, and short circuit current is small, and the electric power that transformer is born is small.
(2) relationship of short-circuit impedance and voltage regulation factor
When transformer full-load run, the height of short-circuit impedance has a certain impact to the height of secondary side output voltage,
Short-circuit impedance is small, and the voltage drop of transformer is small, and voltage regulation factor is low；Short-circuit impedance is big, and the voltage drop of transformer is big, voltage adjustment
Rate is high.
(3) relationship of short-circuit impedance and reactive loss
Transformer is that a perceptual reactive load is caused while power transmission due to the presence of excitation and leakage reactance
A large amount of reactive loss.
It can be seen from the above, the presence of Transformer Short Circuit Impedance, so that transformer in load running, generates pressure drop, thus
So that voltage when load terminal voltage is lower than zero load, to waste a part of electric energy；The presence of Transformer Short Circuit Impedance can also produce
Raw a large amount of reactive loss.As it can be seen that Transformer Short Circuit Impedance causes the energy loss of transformer.
Currently, countries in the world are to transformer energy saving index, more stringent requirements are proposed, and prior art means mainly pass through
Using high-quality silicon steel sheet, amorphous alloy material, rewinding material and the method for reducing winding current density, the active damage of transformer is reduced
Consumption is to realize, but and the problems such as non-power consumption loss, voltage regulation factor caused by unresolved leakage reactance.
Summary of the invention
The problems such as reactive loss to solve existing transformer, the embodiment of the present invention provides a kind of energy-economic transformer.
Energy-economic transformer provided in an embodiment of the present invention, including iron core, low pressure winding and high-voltage winding；Wherein, for section
Any phase of energy transformer, the low pressure winding are formed by lower pressure subsidiary windings in series, and the high-voltage winding is by higher pressure subsidiary winding string
Join；The quantity at least two of the quantity of the lower pressure subsidiary winding and the higher pressure subsidiary winding；The lower pressure subsidiary winding and
The higher pressure subsidiary winding arranged concentric is around the iron core, also, the lower pressure subsidiary winding and the higher pressure subsidiary winding interlock
Arrangement.
Optionally, the lower pressure subsidiary winding and the higher pressure subsidiary winding are staggered and are formed by structure, with the iron
Core it is adjacent be the lower pressure subsidiary winding.
Optionally, the lower pressure subsidiary winding and the higher pressure subsidiary winding are staggered and are formed by structure, with the iron
Core it is adjacent be the higher pressure subsidiary winding.
Optionally, there is winding space between adjacent the lower pressure subsidiary winding and the higher pressure subsidiary winding.
Optionally, there is dielectric between adjacent the lower pressure subsidiary winding and the higher pressure subsidiary winding.
Optionally, the number of the lower pressure subsidiary winding and the higher pressure subsidiary winding is N number of, wherein at least N-1 institute
The number of turns for stating lower pressure subsidiary winding is identical；Also, the number of turns of at least N-1 higher pressure subsidiary windings is identical.
Optionally, the energy-economic transformer further includes zero time limit short-circuit protection, the zero time limit short-circuit protection
It is connected in parallel and is constituted by zero time limit high-speed switch and current-limiting apparatus；The zero time limit short-circuit protection and the low pressure winding string
Connection connection；When transformer operates normally, the zero time limit high-speed switch closure, so that the current-limiting apparatus be isolated；Transformer is negative
When short trouble occurs for lotus side, the zero time limit high-speed switch is disconnected, and the current-limiting apparatus is sealed in circuit, realizes that transformer is high
Impedance operation.
Optionally, the zero time limit high-speed switch disconnects the time used no more than 5ms.
Optionally, the current-limiting apparatus is reactor.
Optionally, the current-limiting apparatus is set in oil tank of transformer.
The embodiment of the present invention by by arranged concentric around iron core, staggered lower pressure subsidiary winding and higher pressure subsidiary winding
Low pressure winding and high-voltage winding in series respectively increase width to leakage field group pair, may be implemented when transformer operates normally
Micro- reactive loss, while improving voltage regulation factor；Structure is simple, manufacturing process is reasonable.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the coils arrangement schematic diagram of energy-economic transformer provided in an embodiment of the present invention；
Fig. 2 be another embodiment of the present invention provides energy-economic transformer coils arrangement schematic diagram；
Fig. 3 is the schematic illustration for the energy-economic transformer that yet another embodiment of the invention provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of energy-economic transformer, including iron core, low pressure winding and high-voltage winding；Wherein, for
Any phase of energy-economic transformer, the low pressure winding are formed by lower pressure subsidiary windings in series, and the high-voltage winding is by higher pressure subsidiary winding
It is connected in series；The quantity at least two of the quantity of the lower pressure subsidiary winding and the higher pressure subsidiary winding；The lower pressure subsidiary winding
And the higher pressure subsidiary winding arranged concentric is around the iron core, also, the lower pressure subsidiary winding and the higher pressure subsidiary winding are handed over
Mistake arrangement.
Energy-economic transformer provided in an embodiment of the present invention, including iron core, low pressure winding and high-voltage winding.For the energy conservation
Any phase of transformer, the low pressure winding are formed by lower pressure subsidiary windings in series, and the high-voltage winding is by higher pressure subsidiary windings in series
It forms；The quantity of the lower pressure subsidiary winding is two or more, and the quantity of the higher pressure subsidiary winding is two or more.The height
Winding, that is, first winding is pressed, head end and end constitute the input terminal of transformer；Low pressure winding, that is, the secondary winding, head end
The output end of transformer is constituted with end.
Using iron core as axle center, the lower pressure subsidiary winding and the higher pressure subsidiary winding arranged concentric around the iron core, and
And the lower pressure subsidiary winding and the higher pressure subsidiary winding are staggered.The lower pressure subsidiary winding and the higher pressure subsidiary winding are concentric
Being arranged in around the iron core can express: with the iron core position of lower pressure subsidiary winding and higher pressure subsidiary winding around, in iron core
Cross section institute in the plane, low pressure winding and high-voltage winding are arranged in around iron core in the form of concentric circles.The lower pressure subsidiary
When winding and the higher pressure subsidiary winding arranged concentric are around the iron core, the higher pressure subsidiary winding along iron core axial direction
Midpoint and the low pressure winding can be aligned along iron core width to direction along the midpoint of iron core axial direction.
The lower pressure subsidiary winding and the higher pressure subsidiary winding are staggered, then adjacent lower pressure subsidiary winding and higher pressure subsidiary winding
Width is constituted to leakage field group pair, the width is to finger perpendicular to the axis direction of iron core.The quantity of the lower pressure subsidiary winding be two and
More than, the quantity of the higher pressure subsidiary winding is two or more, thus constitutes multiple groups width to leakage field group pair.By increasing width to leakage
Magnetic group, to reduce winding leakage field, reduces reactive loss to that can reduce winding leakage reactance, when transformer normal operation may be implemented
Micro- reactive loss, and improve voltage regulation factor.
Energy-economic transformer provided in an embodiment of the present invention is suitable for distribution transformer, the power transformer of various voltage class
And tractive transformer.
The embodiment of the present invention by by arranged concentric around iron core, staggered lower pressure subsidiary winding and higher pressure subsidiary winding
Low pressure winding and high-voltage winding in series respectively increase width to leakage field group pair, may be implemented when transformer operates normally
Micro- reactive loss, while improving voltage regulation factor；Structure is simple, manufacturing process is reasonable.
Fig. 1 is the coils arrangement schematic diagram of energy-economic transformer provided in an embodiment of the present invention.As shown in Figure 1, the low pressure
Sub- winding and the higher pressure subsidiary winding are staggered and are formed by structure, adjacent with the iron core is the lower pressure subsidiary around
Group.
The lower pressure subsidiary winding and the higher pressure subsidiary winding are staggered, arranged concentric is around the iron core.Such as Fig. 1 institute
Show, in the most inner side adjacent with iron core, first arrange lower pressure subsidiary winding L1, then along iron core width to be sequentially arranged higher pressure subsidiary winding H1,
Lower pressure subsidiary winding L2, higher pressure subsidiary winding H2 ... and so on finally arrange lower pressure subsidiary winding Ln, higher pressure subsidiary winding Hn.Low pressure
Sub- winding L1, lower pressure subsidiary winding L2 ... lower pressure subsidiary winding Ln are connected in series and constitute low pressure winding, head end and end a, x table
Show, the output end as transformer；Higher pressure subsidiary winding H1, higher pressure subsidiary winding H2 ... higher pressure subsidiary winding Hn are connected in series and constitute high pressure
Winding, head end and end indicate with A, X, the input terminal as transformer.
Energy-economic transformer provided in an embodiment of the present invention, each iron core column can there are two or multiple lower pressure subsidiary winding L1,
L2 ... Ln, is located at most inner side and other odd-levels close to core side, and lower pressure subsidiary winding L1, L2 ... Ln series connection connects
It connects；Two or more higher pressure subsidiary winding H1, H2 ... Hn, are located at the even level close to core side, higher pressure subsidiary winding H1,
H2 ... Hn is connected in series.The higher pressure subsidiary winding being together in series is as wire inlet loop, and the lower pressure subsidiary winding after series connection is as feeder line
Circuit.
The lower pressure subsidiary winding and the higher pressure subsidiary winding are staggered, arranged concentric is around the iron core, with iron
The adjacent most inner side of core, first arranges the structure type of lower pressure subsidiary winding, and the requirement to insulation distance is lower.
On the basis of the above embodiments, the embodiment of the present invention is in the most inner side adjacent with iron core, first arrange lower pressure subsidiary around
Group, the requirement to insulation distance is lower, is suitable for major applications occasion.
Fig. 2 be another embodiment of the present invention provides energy-economic transformer coils arrangement schematic diagram.As shown in Fig. 2, with
The adjacent most inner side of iron core, first arrange higher pressure subsidiary winding H1, again along iron core width to be sequentially arranged lower pressure subsidiary winding L1, higher pressure subsidiary around
Group H2, lower pressure subsidiary winding L2 ... and so on, finally arrange higher pressure subsidiary winding Hn, lower pressure subsidiary winding Ln.Lower pressure subsidiary winding L1,
Lower pressure subsidiary winding L2 ... lower pressure subsidiary winding Ln, which is connected in series, constitutes low pressure winding, and head end and end are indicated with a, x, as transformation
The output end of device；Higher pressure subsidiary winding H1, higher pressure subsidiary winding H2 ... higher pressure subsidiary winding Hn are connected in series and constitute high-voltage winding, head end
It is indicated with end with A, X, the input terminal as transformer.
Energy-economic transformer provided in an embodiment of the present invention, each iron core column can there are two or multiple higher pressure subsidiary winding H1,
H2 ... Hn, is located at most inner side and other odd-levels close to core side, and higher pressure subsidiary winding H1, H2 ... Hn series connection connects
It connects；Two or more lower pressure subsidiary winding L1, L2 ... Ln, are located at the even level close to core side, lower pressure subsidiary winding L1,
L2 ... Ln is connected in series.The higher pressure subsidiary winding being together in series is as wire inlet loop, and the lower pressure subsidiary winding after series connection is as feeder line
Circuit.
The lower pressure subsidiary winding and the higher pressure subsidiary winding are staggered, arranged concentric is around the iron core, with iron
The adjacent most inner side of core first arranges the structure type of higher pressure subsidiary winding, to the more demanding of insulation distance.
On the basis of the above embodiments, the embodiment of the present invention is in the most inner side adjacent with iron core, first arrange lower pressure subsidiary around
Group, to the more demanding of insulation distance, suitable for the occasion of larger insulation distance can be achieved.
Further, based on the above embodiment, have between adjacent the lower pressure subsidiary winding and the higher pressure subsidiary winding
Winding space.
, should not be tightly adjacent between adjacent lower pressure subsidiary winding and higher pressure subsidiary winding in view of the insulation performance between winding, and
It should be equipped with gap, to improve insulation performance.
On the basis of the above embodiments, the embodiment of the present invention is by making adjacent lower pressure subsidiary winding and higher pressure subsidiary winding
Between be provided with winding space, to enhance the insulating properties between winding.
Further, based on the above embodiment, have between adjacent the lower pressure subsidiary winding and the higher pressure subsidiary winding
Dielectric.
To further increase insulation performance, there is insulation between adjacent the lower pressure subsidiary winding and the higher pressure subsidiary winding
Medium.For oil-immersed transformer, there is transformer oil between winding space, insulation, heat dissipation can be played the role of, is into one
Step improves insulation performance, can add other dielectrics, such as insulating board, cable paper.For dry-type transformer, winding it
Between generally use the method for casting epoxy resin and insulate, and should there are air flues on epoxy resin.
On the basis of the above embodiments, the embodiment of the present invention is by making adjacent the lower pressure subsidiary winding and the height
Pressing has dielectric between sub- winding, further improve the insulation performance between winding.
Further, based on the above embodiment, the number of the lower pressure subsidiary winding and the higher pressure subsidiary winding is N number of,
Wherein, the number of turns of at least N-1 lower pressure subsidiary windings is identical；Also, the number of turns of at least N-1 higher pressure subsidiary windings
It is identical.
To prevent current imbalance phenomenon, the number of turns of each lower pressure subsidiary winding should be identical, the circle of each higher pressure subsidiary winding
Number should be identical.The sum of the number of turns of lower pressure subsidiary winding constitutes the number of turns of low pressure winding, and the sum of the number of turns of higher pressure subsidiary winding constitutes high
Press the number of turns of winding.Since the number of turns of high-voltage winding and the number of turns of low pressure winding and the size of input voltage and output voltage have
It closes, therefore, the number of turns of all lower pressure subsidiary windings may not be able to be made all identical and the number of turns of all higher pressure subsidiary windings is all identical.
When the number of turns that can not realize all lower pressure subsidiary windings is all identical or the number of turns of all higher pressure subsidiary windings is all identical,
It should make in addition to a lower pressure subsidiary winding, the number of turns of all the remaining lower pressure subsidiary windings is all identical；Also, except higher pressure subsidiary around
Group is outer, and the number of turns of all the remaining higher pressure subsidiary windings is all identical.Of the even described lower pressure subsidiary winding and the higher pressure subsidiary winding
Number be it is N number of, then, the number of turns of at least N-1 lower pressure subsidiary windings is identical；Also, at least N-1 higher pressure subsidiaries around
The number of turns of group is identical.
When specifically arranging the number of turns of each lower pressure subsidiary winding, can be unsatisfactory for the number of turns with remaining lower pressure subsidiary winding
The number of turns of identical lower pressure subsidiary winding is not less than the 70% of remaining lower pressure subsidiary umber of turn；Equally, each high pressure is specifically being arranged
When the number of turns of sub- winding, the number of turns for being unsatisfactory for higher pressure subsidiary winding identical with the number of turns of remaining higher pressure subsidiary winding can be made not low
In the 70% of remaining higher pressure subsidiary umber of turn.It, can the further son less to the number of turns if not being able to satisfy above-mentioned 70% condition
The method that winding takes filling dielectric, to reduce current imbalance.
On the basis of the above embodiments, the embodiment of the present invention passes through reasonable Arrangement lower pressure subsidiary winding and higher pressure subsidiary winding
The number of turns, to prevent current imbalance phenomenon.
Further, based on the above embodiment, the energy-economic transformer further includes zero time limit short-circuit protection, and described zero
Time limit short-circuit protection is connected in parallel and is constituted by zero time limit high-speed switch and current-limiting apparatus；The zero time limit short-circuit protection
It is connected in series with the low pressure winding；When transformer operates normally, the zero time limit high-speed switch closure, so that the limit be isolated
Flow device；When short trouble occurs for transformer load side, the zero time limit high-speed switch is disconnected, and the current-limiting apparatus is sealed in back
The operation of transformer high impedance is realized on road.
Fig. 3 is the schematic illustration for the energy-economic transformer that yet another embodiment of the invention provides.As shown in figure 3, the energy conservation
Transformer includes low pressure winding 1, high-voltage winding 2, current-limiting apparatus 3 and zero time limit high-speed switch 4, wherein low pressure winding 1 is by low pressure
Sub- windings in series forms, and high-voltage winding 2 is formed by higher pressure subsidiary windings in series, lower pressure subsidiary winding and higher pressure subsidiary winding arranged concentric in
Around iron core, also, the lower pressure subsidiary winding and the higher pressure subsidiary winding are staggered.
Zero time limit high-speed switch 4 and current-limiting apparatus 3, which are connected in parallel, constitutes zero time limit short-circuit protection；Zero time limit is short
Line protection device and low pressure winding 1 are connected in series.When transformer operates normally, zero time limit high-speed switch 4 closure, so that limit be isolated
Flow device 3；When short trouble occurs for transformer load side, zero time limit high-speed switch 4 is disconnected, and current-limiting apparatus 3 is sealed in circuit, real
Existing transformer high impedance operation.
In Fig. 3, the input terminal of A, X indication transformer, the output end of a, x indication transformer.
On the basis of the above embodiments, the embodiment of the present invention is protected by setting and the concatenated zero time limit short circuit of low pressure winding
Protection unit ensure that when short trouble occurs for transformer load side, the high impedance operation of transformer limits load side short circuit electricity
Stream, reduce short trouble influences caused by electrical equipment, is conducive to the safe and stable operation of transformer.
Further, based on the above embodiment, the zero time limit high-speed switch 4 disconnects the time used no more than 5ms.
To further increase when short trouble occurs, the opening velocity of zero time limit high-speed switch 4, zero time limit high-speed switch
4 use high-speed switch, such as use the switch of Electromagnetic Control principle.The zero time limit high-speed switch 4 disconnects the time used and does not surpass
5ms is crossed, is almost disconnected while short trouble occurs with realizing, and by the access of current-limiting apparatus 3 circuit, reaction speed is close to zero
Time limit.
On the basis of the above embodiments, the embodiment of the present invention is by using high-speed switch, so that zero time limit high-speed switch
The time used is disconnected no more than 5ms, the timeliness that zero time limit high-speed switch reacts when having ensured short trouble, thus further
Enhance safety.
Further, based on the above embodiment, the current-limiting apparatus 3 is reactor.
The current-limiting apparatus 3 can be reactor, for being disconnected in zero time limit high-speed switch 4 when short trouble occurs
Under the action of seal in transformer circuit, play metering function.
Further, based on the above embodiment, the current-limiting apparatus 3 is set in oil tank of transformer.
For the volume for reducing transformer, the current-limiting apparatus 3 be can be set in oil tank of transformer, so that current-limiting apparatus 3
Case arrangement is total to the body (winding, iron core including transformer) of transformer.When the current-limiting apparatus 3 is set to oil tank of transformer
When, current-limiting apparatus can such as use oil-immersed electric reactor using oil immersed type.
Zero time limit high-speed switch 4 of zero time limit short-circuit protection can be set in fuel tank internal, can also pass through conducting wire
It leads to outside cabinet.
On the basis of the above embodiments, the embodiment of the present invention is subtracted by the way that current-limiting apparatus to be set in oil tank of transformer
The small volume of transformer.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of energy-economic transformer, which is characterized in that including iron core, low pressure winding and high-voltage winding；Wherein, for energy-saving transformation
Any phase of device, the low pressure winding are formed by lower pressure subsidiary windings in series, and the high-voltage winding is formed by higher pressure subsidiary windings in series；
The quantity at least two of the quantity of the lower pressure subsidiary winding and the higher pressure subsidiary winding；
The lower pressure subsidiary winding and the higher pressure subsidiary winding arranged concentric are around the iron core, also, the lower pressure subsidiary winding
It is staggered with the higher pressure subsidiary winding.
2. energy-economic transformer according to claim 1, which is characterized in that the lower pressure subsidiary winding and the higher pressure subsidiary winding
It is staggered and is formed by structure, adjacent with the iron core is the lower pressure subsidiary winding.
3. energy-economic transformer according to claim 1, which is characterized in that the lower pressure subsidiary winding and the higher pressure subsidiary winding
It is staggered and is formed by structure, adjacent with the iron core is the higher pressure subsidiary winding.
4. energy-economic transformer according to claim 1, which is characterized in that the adjacent lower pressure subsidiary winding and the high pressure
There is winding space between sub- winding.
5. energy-economic transformer according to claim 4, which is characterized in that the adjacent lower pressure subsidiary winding and the high pressure
There is dielectric between sub- winding.
6. energy-economic transformer according to claim 1, which is characterized in that the lower pressure subsidiary winding and the higher pressure subsidiary winding
Number be N number of, wherein the number of turns of at least N-1 lower pressure subsidiary windings is identical；Also, at least N-1 height
Press the number of turns of sub- winding identical.
7. energy-economic transformer according to claim 1, which is characterized in that the energy-economic transformer further includes the short circuit of zero time limit
Protective device, the zero time limit short-circuit protection are connected in parallel and are constituted by zero time limit high-speed switch and current-limiting apparatus；
The zero time limit short-circuit protection and the low pressure winding are connected in series；When transformer operates normally, zero time limit
High-speed switch closure, so that the current-limiting apparatus be isolated；When short trouble occurs for transformer load side, zero time limit is quickly opened
Shutdown is opened, and the current-limiting apparatus is sealed in circuit, realizes the operation of transformer high impedance.
8. energy-economic transformer according to claim 7, which is characterized in that when used in the zero time limit high-speed switch disconnection
Between be no more than 5ms.
9. energy-economic transformer according to claim 7, which is characterized in that the current-limiting apparatus is reactor.
10. energy-economic transformer according to claim 7, which is characterized in that the current-limiting apparatus is set to oil tank of transformer
In.
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| CN201811486506.2A CN109686542B (en) | 2018-12-06 | 2018-12-06 | Energy-saving transformer |
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| CN203192584U (en) * | 2013-04-03 | 2013-09-11 | 株洲市科达电机技术有限公司 | Concentric type traction transformer with four coaxial split windings |
| CN203232785U (en) * | 2013-04-28 | 2013-10-09 | 特变电工股份有限公司 | Dry-type transformer |
| CN204303536U (en) * | 2014-12-31 | 2015-04-29 | 上海和鸣变压器有限公司 | For the loop construction of two division superconducting transformer |
| CN207367766U (en) * | 2016-09-29 | 2018-05-15 | 国家电网公司 | A kind of built-in transformer current-limiting apparatus |
| CN107146694A (en) * | 2017-07-06 | 2017-09-08 | 华侨大学 | A kind of structure for being used to improve Industrial Frequency Transformer short-circuit impedance |
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