CN109448975A - Transformer group - Google Patents

Transformer group Download PDF

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Publication number
CN109448975A
CN109448975A CN201811574536.9A CN201811574536A CN109448975A CN 109448975 A CN109448975 A CN 109448975A CN 201811574536 A CN201811574536 A CN 201811574536A CN 109448975 A CN109448975 A CN 109448975A
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CN
China
Prior art keywords
group
transformer
low
terminal
phase
Prior art date
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Pending
Application number
CN201811574536.9A
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Chinese (zh)
Inventor
王忠波
王耀强
吴美增
张灿辉
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Hainan Jinpan Intelligent Polytron Technologies Inc
Original Assignee
Hainan Jinpan Intelligent Polytron Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Hainan Jinpan Intelligent Polytron Technologies Inc filed Critical Hainan Jinpan Intelligent Polytron Technologies Inc
Priority to CN201811574536.9A priority Critical patent/CN109448975A/en
Publication of CN109448975A publication Critical patent/CN109448975A/en
Priority to CN201910380082.XA priority patent/CN110111985A/en
Priority to CN201920651308.0U priority patent/CN210039901U/en
Pending legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/346—Preventing or reducing leakage fields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/12—Two-phase, three-phase or polyphase transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F2027/348—Preventing eddy currents

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

The invention discloses a kind of transformer groups, comprising: three two-legged single phase transformers；The two-legged single phase transformer, comprising: the first core limb, the second core limb, the high-tension coil being set on first core limb and low-voltage coil and the high-tension coil and low-voltage coil that are set on second core limb.It only include a low-voltage coil in each core limb in the present invention, this makes between each low-voltage coil without magnetic coupling relation, magnetic flux leakage will not occur because of load imbalance to each other, also eddy-current loss would not be generated, therefore avoid because of load imbalance caused by transformer fault the problem of, meanwhile, compared with the prior art in three-phase axial direction double bundle transformer, the transformer group that the present invention uses is more reliable using safer.

Description

Transformer group
Technical field
The present invention relates to technical field of power systems, specially a kind of transformer group.
Background technique
Transformer is the device for changing alternating voltage using the principle of electromagnetic induction.In wind-power electricity generation, photovoltaic power generation, city It is had a wide range of applications in the power conversion systems in fields such as city's rail traffic traction rectifier, marine electric power propulsion, wherein in electricity In power converter system, it is connected between power supply grid and current transformer by transformer.
For the transformer used in existing power conversion system for three-phase axial direction double bundle transformer, the three-phase is axial double There are two high-tension coil and two independent low-voltage coils in parallel, each low-voltage coils on each core limb of transformer with split winding Connect one group of current transformer, under nominal situation, two groups of current transformers with two low-voltage coils connection on core limb are kept in balance Load.
Three-phase axial direction double bundle transformer the problem is that, once the load imbalance of two groups of current transformers, even two Only one group of current transformer work in group current transformer, when another group of current transformer is opened a way, it may appear that biggish transverse direction magnetic flux leakage causes low The current distribution distortion for pressing coil inside, generates very big eddy-current loss, so that low-voltage coil hot spot is locally occurred, result even in Low-voltage coil failure of insulation, causes transformer fault.
Summary of the invention
The present invention provides a kind of transformer group, the three-phase used in the prior art due to power conversion system can solve Axial direction double bundle transformer is easy the problem of breaking down in current transformer load imbalance.
In order to achieve the above objectives, the present invention provides the following technical scheme that
A kind of transformer group, comprising: three two-legged single phase transformers；Wherein:
Three two-legged single phase transformers form the double transformer with split winding groups of a three-phase twin columns；
Every two-legged single phase transformer, comprising: the first core limb, the second core limb are set to first iron core High-tension coil and low-voltage coil on column and the high-tension coil and low-voltage coil being set on second core limb；
The high-tension coil of first core limb of three two-legged single phase transformers, connection form double points of the three-phase twin columns First group of HV Terminal of depressor group of fissioning；
The high-tension coil of second core limb of three two-legged single phase transformers, connection form double points of the three-phase twin columns Second group of HV Terminal of depressor group of fissioning；
The low-voltage coil of first core limb of three two-legged single phase transformers, connection form double points of the three-phase twin columns First group of low-voltage terminal of depressor group of fissioning；
The low-voltage coil of second core limb of three two-legged single phase transformers, connection form double points of the three-phase twin columns Second group of low-voltage terminal of depressor group of fissioning.
Optionally, the first iron core in three two-legged single phase transformers of the double transformer with split winding groups of the three-phase twin columns is formed High-tension coil on column uses delta connection or star connection, obtains first group of HV Terminal；Form the three-phase The high-tension coil on the second core limb in three two-legged single phase transformers of the double transformer with split winding groups of twin columns uses and described the The identical connection of high-tension coil on one core limb obtains second group of HV Terminal；
HV Terminal of the same name is in parallel in first group of HV Terminal and second group of HV Terminal, composition described three The unified HV Terminal of the double transformer with split winding groups of phase twin columns.
Optionally, the first iron core in three two-legged single phase transformers of the double transformer with split winding groups of the three-phase twin columns is formed Low-voltage coil on column is connected using delta connection or star connection, obtains first group of low-voltage terminal；Described in composition The low-voltage coil on the second core limb in three two-legged single phase transformers of the double transformer with split winding groups of three-phase twin columns uses and institute The identical connection of low-voltage coil on the first core limb is stated, second group of low-voltage terminal is obtained.
Optionally, first group of low-voltage terminal connects first group of electrical equipment；Second group of low-voltage terminal connection the Two groups of electrical equipments.
Optionally, first group of electrical equipment and second group of electrical equipment being run while,
Or only run in first group of electrical equipment and second group of electrical equipment one group of same time is electrically set It is standby.
Optionally, after low-voltage terminal of the same name in first group of low-voltage terminal and second group of low-voltage terminal is in parallel, The unified low-voltage terminal of the double transformer with split winding groups of the three-phase twin columns is formed, the double transformer with split winding groups unifications of the three-phase twin columns Low-voltage terminal connects one or more groups of electrical equipments.
Optionally, the double transformer with split winding groups of the three-phase twin columns are mounted on inside the tower of wind power generating set, in cabin Portion or tower external equipment platform.
Optionally, the two-legged single phase transformer includes: the dry-type transformer of twin columns single-phase resin insulation, twin columns single phase Soak transformer or twin columns single phase gas insulation transformer.
Optionally, the two-legged single phase transformer, further includes: shell, cooling system and protective device.
As can be seen from the above technical solutions, the invention discloses a kind of transformer groups, comprising: three single-phase transformations of twin columns Device；The two-legged single phase transformer, comprising: the first core limb, the second core limb, the high pressure being set on first core limb Coil and low-voltage coil and the high-tension coil and low-voltage coil being set on second core limb.Each of present invention It only include a low-voltage coil in core limb, this makes between each low-voltage coil without magnetic coupling relation, to each other will not be because negative Carry it is unbalanced there is magnetic flux leakage, would not also generate eddy-current loss, thus avoid the transformer caused by load imbalance therefore The problem of barrier, meanwhile, compared with the prior art in three-phase axial direction double bundle transformer, the transformer group application that the present invention uses It is safer, it is more reliable.
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 only this The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of front plan view of transformer group disclosed by the embodiments of the present invention；
Fig. 2 is that the embodiment of the present invention discloses the double transformer with split winding groups connection schematic diagrames of three-phase twin columns；
Fig. 3 is the back side top view of transformer group disclosed by the embodiments of the present invention；
Fig. 4 is the front direct-view figure of transformer group disclosed by the embodiments of the present invention；
Fig. 5 is that figure is looked at the back side of transformer group disclosed by the embodiments of the present invention straight；
Fig. 6 is Dy coil Mating graph disclosed by the embodiments of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of transformer group, the three-phase used in the prior art due to power conversion system can solve Axial direction double bundle transformer is easy the problem of breaking down in current transformer load imbalance.
As shown in Figure 1, the embodiment of the invention discloses a kind of transformer groups, comprising:
Three two-legged single phase transformers；Wherein: three two-legged single phase transformers form the double divisions of a three-phase twin columns Transformer group.Three two-legged single phase transformers are respectively the first two-legged single phase transformer 1001, the second two-legged single phase transformer 1002 and third two-legged single phase transformer 1003.
The two-legged single phase transformer, comprising: the first core limb 1019, is set to described first at second core limb 1016 High-tension coil 1021 and low-voltage coil 1020 on core limb and the high-tension coil 1018 being set on second core limb With low-voltage coil 1017.
Wherein, the low-voltage coil 1020 on the first core limb 1019 of two-legged single phase transformer is low on the second core limb Crimping circle 1017 constitutes the double splitted constructions of twin columns.
The high-tension coil 1021 of first core limb 1019 of three two-legged single phase transformers 1001,1002 and 1003, Connection forms first group of HV Terminal of the double transformer with split winding groups of the three-phase twin columns.
The high-tension coil 1018 of second core limb 1016 of three two-legged single phase transformers 1001,1002 and 1003, Connection forms second group of HV Terminal of the double transformer with split winding groups of the three-phase twin columns.
The low-voltage coil 1020 of first core limb 1019 of three two-legged single phase transformers 1001,1002 and 1003, Connection forms first group of low-voltage terminal of the double transformer with split winding groups of the three-phase twin columns.
The low-voltage coil 1017 of second core limb 1016 of three two-legged single phase transformers 1001,1002 and 1003, Connection forms second group of low-voltage terminal of the double transformer with split winding groups of the three-phase twin columns.
In a particular application, the HV Terminal of transformer group is connect with power supply grid, and low-voltage terminal is connect with electrical equipment, Network voltage is changed into the voltage that electrical equipment is able to use.
Present embodiments provide a kind of transformer group, comprising: three two-legged single phase transformers；The single-phase transformation of twin columns Device, comprising: the first core limb, the second core limb, the high-tension coil being set on first core limb and low-voltage coil and The high-tension coil and low-voltage coil being set on second core limb.It is only low comprising one in each core limb in the present invention Crimping circle, this makes magnetic flux leakage will not occur because of load imbalance to each other without magnetic coupling relation between each low-voltage coil, Eddy-current loss would not be generated, therefore caused by avoiding because of load imbalance the problem of transformer fault, meanwhile, compared to existing There is a three-phase axial direction double bundle transformer in technology, the transformer group that the present invention uses is more reliable using safer.
It should be noted that the double division dry-type transformer group complete functions of three-phase twin columns of the invention, can replace completely The identical separate unit three-phase axial direction double bundle transformer of each rated value.
For example, to configure grid-connected transformer in a 6MW wind power generating set, the connection used couple for Dy three The double division dry-type transformer groups of phase twin columns, every rated value of the transformer group are as follows:
The double division dry-type transformer groups of one three-phase twin columns, rated capacity 7500kVA, voltage rating 35/0.69kV, Short-circuit impedance 10%.Wherein, the rated capacity of the two-legged single phase transformer used in the double division dry-type transformer groups of three-phase twin columns For 2500KVA, rated high voltage voltage 35kV, nominal low-voltage voltage 0.4kV.All first column high-tension coils and the second pillar height crimping The capacity of circle is 1250kVA, high tension voltage 35kV.The capacity of all first column low-voltage coils and the second column low-voltage coil is 1250kVA, low voltage 0.4kV.
As shown in the above, the double division dry-type transformer groups of the three-phase twin columns are fully able to meet 6MW wind-driven generator The transformation demand of group, transformer group complete function of the invention can replace axial double points of the identical separate unit three-phase of each rated value Fission depressor.
Optionally, in transformer group disclosed in another embodiment of the application, the first of the double transformer with split winding groups of three-phase twin columns The connection type of group HV Terminal and second high-pressure side are as follows: triangle connection.
As shown in Fig. 2, coupling schematic diagram for the double transformer with split winding groups of three-phase twin columns.In Fig. 2, HV11For First twin columns list The first column high-tension coil in phase transformer, HV12For the first column high-tension coil in second two-legged single phase transformer, HV13For The first column high-tension coil in third platform two-legged single phase transformer, LV11It is low for the first column in First two-legged single phase transformer Crimping circle, LV12For the first column low-voltage coil in second two-legged single phase transformer, LV13For third platform two-legged single phase transformer In the first column low-voltage coil, HV21For the second column high-tension coil in First two-legged single phase transformer, HV22It is double for second The second column high-tension coil in column single-phase transformer, HV23For the second column high-tension coil in third platform two-legged single phase transformer, LV21For the second column low-voltage coil in First two-legged single phase transformer, LV22For in second two-legged single phase transformer Two column low-voltage coils, LV23For the second column low-voltage coil in third platform two-legged single phase transformer.
Specifically, the first column high-tension coil HV in First two-legged single phase transformer11First end and third platform twin columns The first column high-tension coil HV in single-phase transformer13Second end be connected, the first pillar height in First two-legged single phase transformer Crimping circle HV11Second end and the first column high-tension coil HV in second two-legged single phase transformer12First end be connected, the The first column high-tension coil HV in two two-legged single phase transformers12Second end and third platform two-legged single phase transformer in first Column high-tension coil HV13First end be connected, HV11、HV12、HV13Form triangle connection, HV11With HV13Connecting pin be high pressure Terminal A1, HV11With HV12Connecting pin be HV Terminal B1, HV12With HV13Connecting pin be HV Terminal C1, HV Terminal A1, B1, C1 form first group of HV Terminal.
The second column high-tension coil HV in First two-legged single phase transformer21First end and the single-phase transformation of third platform twin columns The second column high-tension coil HV in device23Second end be connected, the second column high-tension coil in First two-legged single phase transformer HV21Second end and the second column high-tension coil HV in second two-legged single phase transformer22First end be connected, second is double The second column high-tension coil HV in column single-phase transformer22Second end and third platform two-legged single phase transformer in the second pillar height pressure Coil HV23First end be connected, HV21、HV22、HV23Form triangle connection, HV21With HV23Connecting pin be HV Terminal A2, HV21With HV22Connecting pin be HV Terminal B2, HV22With HV23Connecting pin be HV Terminal C2, HV Terminal A2, B2, C2 group At second group of HV Terminal.
Wherein, simultaneously by the HV Terminal A2 in the HV Terminal A1 and second group of HV Terminal in first group of HV Terminal Join, the HV Terminal B1 in first group of HV Terminal is in parallel with the HV Terminal B2 in second group of HV Terminal, first group of high pressure HV Terminal C1 in terminal is in parallel with the HV Terminal C2 in second group of HV Terminal, forms the double divisions of the three-phase twin columns and becomes Depressor group unified HV Terminal A, B, C.
In the double transformer with split winding group concrete applications of three-phase twin columns, the double transformer with split winding groups of the three-phase twin columns are unified HV Terminal A, B, C are connected to the grid.
Optionally, in transformer group disclosed in another embodiment of the application, the first of the double transformer with split winding groups of three-phase twin columns The connection type of group HV Terminal and second high-pressure side are as follows: star-like connection.
Specifically, the first column high-tension coil HV in First two-legged single phase transformer11First end, second twin columns list The first column high-tension coil HV in phase transformer12First end, the first column high-tension coil in third platform two-legged single phase transformer HV13Three end of first end be connected, HV11、HV12、HV13Form star-like connection, the first pillar height in First two-legged single phase transformer Crimping circle HV11First column high-tension coil HV of the second end as HV Terminal A1, in second two-legged single phase transformer12's First column high-tension coil HV of the second end as HV Terminal B1, in third platform two-legged single phase transformer13Second end as high Pressure side sub- C1, HV Terminal A1, B1, C1 form first group of HV Terminal.
The second column high-tension coil HV in First two-legged single phase transformer21First end, second single-phase transformation of twin columns The second column high-tension coil HV in device22First end, the second column high-tension coil HV in third platform two-legged single phase transformer23's Three end of first end is connected, HV21、HV22、HV23Form star-like connection, the second pillar height crimping in First two-legged single phase transformer Enclose HV21Second column high-tension coil HV of the second end as HV Terminal A1, in second two-legged single phase transformer22Second End is used as HV Terminal B1, the second column high-tension coil HV in third platform two-legged single phase transformer23Second end as high-voltage end Sub- C1, HV Terminal A1, B1, C1 form second group of HV Terminal.
Wherein, simultaneously by the HV Terminal A2 in the HV Terminal A1 and second group of HV Terminal in first group of HV Terminal Join, the HV Terminal B1 in first group of HV Terminal is in parallel with the HV Terminal B2 in second group of HV Terminal, first group of high pressure HV Terminal C1 in terminal is in parallel with the HV Terminal C2 in second group of HV Terminal, forms the double divisions of the three-phase twin columns and becomes Depressor group unified HV Terminal A, B, C.
Optionally, in transformer group disclosed in another embodiment of the application, the first of the double transformer with split winding groups of three-phase twin columns The connection type of group low-voltage terminal and the second low-voltage terminal are as follows: star-like connection.
Specifically, as shown in Fig. 2, the first column low-voltage coil LV in First two-legged single phase transformer11First end, The first column low-voltage coil LV in two two-legged single phase transformers12First end, first in third platform two-legged single phase transformer Column low-voltage coil LV13Three end of first end be connected, LV11、LV12、LV13Star-like connection is formed, in First two-legged single phase transformer The first column low-voltage coil LV11First column low pressure of the second end as low-voltage terminal a1, in second two-legged single phase transformer Coil LV12First column low-voltage coil LV of the second end as low-voltage terminal b1, in third platform two-legged single phase transformer13? Two ends are as low-voltage terminal c1, and the endpoint that three ends are connected to form is as low-voltage terminal n1, low-voltage terminal a1, b1, c1, n1 composition the One group of low-voltage terminal.
The second column low-voltage coil LV in First two-legged single phase transformer21First end, second single-phase transformation of twin columns The second column low-voltage coil LV in device22First end, the second column low-voltage coil LV in third platform two-legged single phase transformer23's Three end of first end is connected, LV21、LV22、LV23Form star-like connection, the second column low-voltage line in First two-legged single phase transformer Enclose LV21Second column low-voltage coil LV of the second end as low-voltage terminal a2, in second two-legged single phase transformer22Second End is used as low-voltage terminal b2, the second column low-voltage coil LV in third platform two-legged single phase transformer23Second end as low-pressure end Sub- c2, the endpoint that three ends are connected to form form second group of low-voltage terminal as low-voltage terminal n2, low-voltage terminal a2, b2, c2, n2.
Optionally, described first group of low-voltage terminal a1, b1, c1, n1 connect first group of electrical equipment, second group of low pressure Terminal a2, b2, c2, n2 connect second group of electrical equipment.
It should be noted that the electrical equipment is generally current transformer.
Optionally, while first group of electrical equipment and second group of electrical equipment being run or the same time only transports One group of electrical equipment in row first group of electrical equipment and second group of electrical equipment.
It should be noted that first group of electrical equipment and second group of electrical equipment are independent mutually, two groups electrical Equipment can be run simultaneously, can also only be run wherein one group of electrical equipment, be closed another group of electrical equipment.
In a particular application, when the wherein one group of failure or wind resource deficiency in two groups of electrical equipments, in order to reduce Equipment loss can only run one group of current transformer, greatly improve the flexibility that electrical equipment puts into operation, be further ensured that economy Benefit.
Optionally, the low-voltage terminal a2 in the low-voltage terminal a1 and second group of low-voltage terminal in first group of low-voltage terminal is simultaneously Join, the low-voltage terminal b1 in first group of low-voltage terminal is in parallel with the low-voltage terminal b2 in second group of low-voltage terminal, first group of low pressure Low-voltage terminal c1 in terminal is in parallel with the low-voltage terminal c2 in second group of low-voltage terminal, the low-pressure end in first group of low-voltage terminal Sub- n1 is in parallel with the low-voltage terminal n2 in second group of low-voltage terminal, forms the low of the double transformer with split winding groups unifications of the three-phase twin columns Pressure side sub- a, b, c, n, connect one or more groups of electrical equipments.
Optionally, in transformer group disclosed in another embodiment of the application, the first of the double transformer with split winding groups of three-phase twin columns The connection type of group low-voltage terminal and the second low-voltage terminal are as follows: triangle connection.
Specifically, the first column low-voltage coil LV in First two-legged single phase transformer11First end and third platform twin columns The first column low-voltage coil LV in single-phase transformer13Second end be connected, the first column in First two-legged single phase transformer is low Crimping circle LV11Second end and the first column low-voltage coil LV in second two-legged single phase transformer12First end be connected, the The first column low-voltage coil LV in two two-legged single phase transformers12Second end and third platform two-legged single phase transformer in first Column low-voltage coil LV13First end be connected, LV11、LV12、LV13Form triangle connection, LV11With LV13Connecting pin be low pressure Terminal a1, LV11With LV12Connecting pin be low-voltage terminal b1, LV12With LV13Connecting pin be low-voltage terminal c1, low-voltage terminal a1, B1, c1 form first group of low-voltage terminal.
The second column low-voltage coil LV in First two-legged single phase transformer21First end and the single-phase transformation of third platform twin columns The second column low-voltage coil LV in device23Second end be connected, the second column low-voltage coil in First two-legged single phase transformer LV21Second end and the second column low-voltage coil LV in second two-legged single phase transformer22First end be connected, second is double The second column low-voltage coil LV in column single-phase transformer22Second end and third platform two-legged single phase transformer in the second column low pressure Coil LV23First end be connected, LV21、LV22、LV23Form triangle connection, LV21With LV23Connecting pin be low-voltage terminal a2, LV21With LV22Connecting pin be low-voltage terminal b2, LV22With LV23Connecting pin be low-voltage terminal c2, low-voltage terminal a2, b2, c2 group At second group of low-voltage terminal.
Optionally, described first group of low-voltage terminal a1, b1, c1 connect first group of electrical equipment, second group of low-pressure end Sub- a2, b2, c2 connect second group of electrical equipment.
Optionally, the low-voltage terminal a2 in the low-voltage terminal a1 and second group of low-voltage terminal in first group of low-voltage terminal is simultaneously Join, the low-voltage terminal b1 in first group of low-voltage terminal is in parallel with the low-voltage terminal b2 in second group of low-voltage terminal, first group of low pressure Low-voltage terminal c1 in terminal is in parallel with the low-voltage terminal c2 in second group of low-voltage terminal, forms the double divisions of the three-phase twin columns and becomes Depressor group unified low-voltage terminal a, b, c, connect one or more groups of electrical equipments.
It should be noted that the first column low-voltage terminal a1 of the double transformer with split winding groups of three-phase twin columns described in Fig. 1 is 1009, First column low-voltage terminal n1 is 1010, and the first column low-voltage terminal b1 is 1011, and the first column low-voltage terminal c1 is 1012.
As shown in figure 3, being transformer group back side top view of the invention.Wherein, 2001 be the second column low-voltage terminal a2, 2002 be the second column low-voltage terminal n2, and 2003 be the second column low-voltage terminal b2, and 2004 be the second column low-voltage terminal c2.
As shown in figure 4, looking at figure straight for transformer group front of the invention.Wherein, A is the double division transformations of the three-phase twin columns The A phase HV Terminal of the unified HV Terminal of device group, B are the unified HV Terminal of the double transformer with split winding groups of the three-phase twin columns B phase HV Terminal, C are the C phase HV Terminal of the unified HV Terminal of the double transformer with split winding groups of the three-phase twin columns, a1 first The a phase low-voltage terminal of group low-voltage terminal, b1 are the b phase low-voltage terminal of first group of low-voltage terminal, and c1 is the c of first group of low-voltage terminal Phase low-voltage terminal, n1 are first group of low-voltage terminal n phase low-voltage terminal.
As shown in figure 5, looking at figure straight for the transformer group back side of the invention.Wherein, A is the double division transformations of the three-phase twin columns The A phase HV Terminal of the unified HV Terminal of device group, B are the unified HV Terminal of the double transformer with split winding groups of the three-phase twin columns B phase HV Terminal, C are the C phase HV Terminal of the unified HV Terminal of the double transformer with split winding groups of the three-phase twin columns, a2 second The a phase low-voltage terminal of group low-voltage terminal, b2 are the b phase low-voltage terminal of second group of low-voltage terminal, and c2 is the c of second group of low-voltage terminal Phase low-voltage terminal, n2 are second group of low-voltage terminal n phase low-voltage terminal.
It should be noted that as shown in Fig. 2, in three two-legged single phase transformers of the double transformer with split winding groups of three-phase twin columns High-tension coil HV on first column11、HV12、HV13With the high-tension coil HV on the second column21、HV22、HV23Triangle is all made of to connect Method, the low-voltage coil LV on the first column11、LV12、LV13With the low-voltage coil LV on the second column21、LV22、LV23Star is all made of to connect Method connection, the coupling structure are known as the connection of Dy coil, as shown in fig. 6, being Dy coil Mating graph.
Optionally, the double transformer with split winding groups of the three-phase twin columns are mounted on inside the tower of wind power generating set, in cabin Portion or tower external equipment platform.
It should be noted that specific installation site can be according to specific the present invention is not limited to above three installation site Situation sets itself.
Optionally, the two-legged single phase transformer includes: the dry-type transformer of twin columns single-phase resin insulation, twin columns single phase Soak transformer or twin columns single phase gas insulation transformer.
It should be noted that the present invention is not limited to three kinds of transformers of the example above, in addition to the transformer of the example above It is all meet the present invention claims transformer all belong to the scope of protection of the present invention within.
Optionally, the two-legged single phase transformer, further includes: shell, cooling system and protective device.
It should be noted that transformer group disclosed by the embodiments of the present invention can be used for wind-power electricity generation, photovoltaic power generation, city The fields such as rail traffic traction rectifier, marine electric power propulsion.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability It include so that the process, method, commodity or the equipment that include a series of elements not only include those elements, but also to wrap Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including element There is also other identical elements in process, method, commodity or equipment.
It will be understood by those skilled in the art that embodiments herein can provide as method, system or computer program product. Therefore, complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the application Form.It is deposited moreover, the application can be used to can be used in the computer that one or more wherein includes computer usable program code The shape for the computer program product implemented on storage media (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) Formula.
The above is only embodiments herein, are not intended to limit this application.To those skilled in the art, Various changes and changes are possible in this application.It is all within the spirit and principles of the present application made by any modification, equivalent replacement, Improve etc., it should be included within the scope of the claims of this application.

Claims (9)

1. a kind of transformer group characterized by comprising three two-legged single phase transformers；Wherein:
Three two-legged single phase transformers form the double transformer with split winding groups of a three-phase twin columns；
Every two-legged single phase transformer, comprising: the first core limb, the second core limb are set on first core limb High-tension coil and low-voltage coil and the high-tension coil and low-voltage coil that are set on second core limb；
The high-tension coil of first core limb of three two-legged single phase transformers, connection form the double divisions of the three-phase twin columns and become First group of HV Terminal of depressor group；
The high-tension coil of second core limb of three two-legged single phase transformers, connection form the double divisions of the three-phase twin columns and become Second group of HV Terminal of depressor group；
The low-voltage coil of first core limb of three two-legged single phase transformers, connection form the double divisions of the three-phase twin columns and become First group of low-voltage terminal of depressor group；
The low-voltage coil of second core limb of three two-legged single phase transformers, connection form the double divisions of the three-phase twin columns and become Second group of low-voltage terminal of depressor group.
2. transformer group according to claim 1, which is characterized in that form the double transformer with split winding groups of the three-phase twin columns The high-tension coil on the first core limb in three two-legged single phase transformers uses delta connection or star connection, obtains institute State first group of HV Terminal；Form the second iron in three two-legged single phase transformers of the double transformer with split winding groups of the three-phase twin columns High-tension coil on stem uses connection identical with the high-tension coil on first core limb, obtains second group of high pressure Terminal；
HV Terminal of the same name is in parallel in first group of HV Terminal and second group of HV Terminal, and it is double to form the three-phase The unified HV Terminal of the double transformer with split winding groups of column.
3. transformer group according to claim 1, which is characterized in that form the double transformer with split winding groups of the three-phase twin columns The low-voltage coil on the first core limb in three two-legged single phase transformers is connected using delta connection or star connection, is obtained To first group of low-voltage terminal；Form the in three two-legged single phase transformers of the double transformer with split winding groups of the three-phase twin columns Low-voltage coil on two core limbs uses connection identical with the low-voltage coil on first core limb, obtains described second group Low-voltage terminal.
4. transformer group according to claim 3, which is characterized in that described first group of the connection of first group of low-voltage terminal electrical Equipment；Second group of low-voltage terminal connects second group of electrical equipment.
5. transformer group according to claim 4, which is characterized in that while running first group of electrical equipment and described Second group of electrical equipment,
Or the same time only runs one group of electrical equipment in first group of electrical equipment and second group of electrical equipment.
6. transformer group according to claim 3, which is characterized in that first group of low-voltage terminal and it is described second group it is low After low-voltage terminal of the same name is in parallel in pressure side, the unified low-voltage terminal of the double transformer with split winding groups of the three-phase twin columns, institute are formed It states the unified low-voltage terminal of the double transformer with split winding groups of three-phase twin columns and connects one or more groups of electrical equipments.
7. transformer group according to claim 1, which is characterized in that the double transformer with split winding groups of the three-phase twin columns are mounted on Inside the tower of wind power generating set, engine room inside or tower external equipment platform.
8. transformer group according to claim 1, which is characterized in that the two-legged single phase transformer includes: that twin columns are single-phase Dry-type transformer, twin columns single-phase oil immersed transformer or the twin columns single phase gas insulation transformer of insulation resin.
9. transformer group according to claim 1, which is characterized in that the two-legged single phase transformer, further includes: shell, Cooling system and protective device.
CN201811574536.9A 2018-12-21 2018-12-21 Transformer group Pending CN109448975A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201811574536.9A CN109448975A (en) 2018-12-21 2018-12-21 Transformer group
CN201910380082.XA CN110111985A (en) 2018-12-21 2019-05-08 Transformer group
CN201920651308.0U CN210039901U (en) 2018-12-21 2019-05-08 Transformer bank

Applications Claiming Priority (1)

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CN201811574536.9A CN109448975A (en) 2018-12-21 2018-12-21 Transformer group

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109935455A (en) * 2019-04-30 2019-06-25 江苏华鹏变压器有限公司 A kind of 110kV dry-type three-phase transformer
CN112216486A (en) * 2020-09-30 2021-01-12 中电电气(江苏)变压器制造有限公司 Novel three-phase transformer composed of three single-phase multi-tap transformers
CN112259342A (en) * 2020-09-30 2021-01-22 中电电气(江苏)变压器制造有限公司 Novel connection structure of three-phase transformer and SCR copper bar

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109935455A (en) * 2019-04-30 2019-06-25 江苏华鹏变压器有限公司 A kind of 110kV dry-type three-phase transformer
CN112216486A (en) * 2020-09-30 2021-01-12 中电电气(江苏)变压器制造有限公司 Novel three-phase transformer composed of three single-phase multi-tap transformers
CN112259342A (en) * 2020-09-30 2021-01-22 中电电气(江苏)变压器制造有限公司 Novel connection structure of three-phase transformer and SCR copper bar

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