CN104078195B - three-phase coupling reactor and converter - Google Patents
three-phase coupling reactor and converter Download PDFInfo
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- CN104078195B CN104078195B CN201410306862.7A CN201410306862A CN104078195B CN 104078195 B CN104078195 B CN 104078195B CN 201410306862 A CN201410306862 A CN 201410306862A CN 104078195 B CN104078195 B CN 104078195B
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Abstract
The invention discloses a three-phase coupling reactor and a converter. The three-phase coupling reactor comprises an iron core and six windings, the iron core comprises an upper iron yoke, a lower iron yoke, at least one first iron core post without a gas gap and three second iron core posts with gas gaps, wherein the first iron core post and the second iron core posts are located between the upper iron yoke and the lower iron yoke; two windings wind each second iron core post, and the ends of the two windings on the same second iron core post in different names are connected in a short circuit mode. According to the three-phase coupling reactor and converter, the zero sequence circulating current impedance of the converter system is increased through the coupling between windings, and accordingly the problem of uneven current of parallel power modules due to zero sequence circulating current is effectively solved.
Description
Technical field
The present invention relates to current transformer field, more particularly, it relates to one is used for suppressing zero sequence ring in current transformer
The coupling reactor of stream.
Background technology
Along with Power Electronic Technique and the development of product, Large Copacity current transformer is progressively used widely.Greatly
In capacity current transformer, typically improved the load of switching device by the parallel connection of the modules such as IGBT, MOSFET
Stream ability.But, the output characteristics of power model of parallel connection, transfer characteristic, gate electrode drive signals time delay etc.
Factor often there are differences, and these differences will cause producing between power model in parallel zero sequence circulation so that
Power model in parallel static and dynamic time be unable to reach the most equal stream mode, thus after limiting parallel connection
The using effect of switching device.
For suppressing another zero sequence circulation, the generally ac output end at two power models in parallel increases isolation change
Depressor or use suitable software scenario, the problem solving parallel power intermodule not current-sharing.But, upper
Stating in scheme, the isolating transformer of increase will make the volume of converter system, weight, cost, loss significantly
Increase；The use of zero sequence circulation control software then can increase the complexity of control system.
Summary of the invention
The technical problem to be solved in the present invention is, presses down in the above-mentioned current transformer with two power models
The problem that zero sequence circulation cost processed is high, relative complex, it is provided that a kind of coupling reactor and current transformer.
The present invention solves the technical scheme of above-mentioned technical problem and is to provide a kind of coupling reactor, is used for
Be concatenated into the outfan of two power models in parallel, this coupling reactor include iron core and six around
Group, described iron core includes upper yoke, lower yoke and lays respectively between described upper yoke and lower yoke
First iron core column of at least air-gap-free and three the second iron core column having air gap；Each described second iron core
On post, one group of different name end rotating around two windings being provided with on two windings, and same second iron core column is short
Connect；The single terminals of a winding in described second iron core column are for connecting the defeated of a power model
Go out end, the single terminals of another winding for connecting the outfan of another power model, two around
The different name of group connects end and is used for connecting load.
In coupling reactor of the present invention, each described second iron core column includes the top connected
And bottom, and described upper and lower is respectively provided with air gap；Two windings in this second iron core column rotating around
It is located at upper and lower.
In coupling reactor of the present invention, two windings in same second iron core column side by side around
It is located on same section of this second iron core column.
In coupling reactor of the present invention, described iron core includes the first iron core of two air-gap-free
Post, described first iron core column and the second iron core column be arranged in parallel and described three second iron core column are positioned at two nothings
Between first iron core column of air gap.
In coupling reactor of the present invention, described first iron core column is parallel with the second iron core column to be set
Put, and described three second iron core column are positioned at the same side of the first iron core column.
The present invention also provides for a kind of current transformer, and including the power model that at least two is in parallel, this current transformer also wraps
Include the coupling reactor of the outfan being concatenated into described power model；Described coupling reactor includes
Iron core and six windings, described iron core include upper yoke, lower yoke and lay respectively at described upper yoke and
First iron core column of at least air-gap-free between lower yoke and three the second iron core column having air gap；Each
Rotating around the one of two windings being provided with on two windings, and same second iron core column in described second iron core column
Group different name end short circuit；Defeated as current transformer of the different name end of the short circuit of two windings in same second iron core column
Go out end, the independent different name end of each winding is connected respectively to the outfan of a power model.
In current transformer of the present invention, each described second iron core column includes the upper and lower connected,
And described upper and lower is respectively provided with air gap；Two windings in this second iron core column are rotating around being located at top
And bottom.
In current transformer of the present invention, the first winding in same second iron core column and the second winding are side by side
It is wound on same section of this second iron core column.
In current transformer of the present invention, described iron core includes the first iron core column of two air-gap-free, described
First iron core column and the second iron core column be arranged in parallel and described three second iron core column are positioned at two air-gap-free
Between first iron core column.
In current transformer of the present invention, described first iron core column and the second iron core column be arranged in parallel, and institute
State three second iron core column and be positioned at the same side of the first iron core column.
The coupling reactor of the present invention and current transformer, increase converter system by the coupling between winding
Zero sequence circulation impedance, thus the problem effectively solving to cause parallel power module not current-sharing due to zero sequence circulation.
The magnetic flux that the present invention produces to common mode current also by air-gap-free iron core column provides low reluctance return path, suppresses unsteady flow
The common mode current produced when device runs, can be substantially reduced the volume of converter system, cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of coupling reactor first embodiment of the present invention.
Fig. 2 is the schematic diagram of coupling reactor the second embodiment of the present invention.
Fig. 3 is the schematic diagram of coupling reactor the 3rd embodiment of the present invention.
Fig. 4 is the schematic diagram of coupling reactor the 4th embodiment of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and reality
Execute example, the present invention is further elaborated.Only should be appreciated that specific embodiment described herein
Only in order to explain the present invention, it is not intended to limit the present invention.
The coupling reactor of the present invention is applied to the current transformer with two power models in parallel, can press down
The power model of system parallel connection produces because of differences such as output characteristics, transfer characteristic, gate electrode drive signals time delays
Zero sequence circulation.This coupling reactor includes iron core and six windings, above-mentioned iron core include upper yoke, under
Iron yoke and lay respectively at first iron core column and three of at least air-gap-free between upper yoke and lower yoke
Root has the second iron core column of air gap；Rotating around being provided with two windings in each second iron core column, and same second
One group of different name end short circuit of two windings in iron core column.
Owing to there is mutual inductance in two windings in same second iron core column, when coupling reactor is concatenated into change
When flowing the outfan of power model in parallel in device, the zero sequence circulation impedance making system is relatively used common reactance
Substantially increasing during device, the effect of suppression zero sequence circulation becomes apparent from, thus improves the equal of the power model of parallel connection
Stream effect.
As it is shown in figure 1, be the schematic diagram of coupling reactor first embodiment of the present invention.In the present embodiment
Coupling reactor include iron core and six winding L1_A, L1_B, L1_C, L2_A, L2_B,
L2_C, and above-mentioned iron core include upper yoke, lower yoke (upper yoke, lower yoke are all permeability magnetic material),
And lay respectively at the first iron core column 11 of two air-gap-free between upper yoke and lower yoke and three have gas
Second iron core column 12 of gap.Three second iron core column 12 be arranged in parallel with two first iron core column 11, and three
Second iron core column 12 is all located between two first iron core column 11.When implementing, above-mentioned upper yoke, under
Iron yoke the first iron core column 11 and the second iron core column 12 can be structure as a whole.
Above-mentioned each second iron core column 12 includes the upper and lower connected, and upper and lower is respectively provided with gas
Gap.Six windings L1_A, L1_B, L1_C, L2_A, L2_B, L2_C are rotating around being located at three second
In iron core column 12, and two winding L1_A and L2_A in same second iron core column 12, L1_B and L2_B,
L1_C and L2_C is rotating around the upper and lower being set to the second iron core column 12.In same second iron core column 12
Winding L1_A and L2_A, L1_B and L2_B, one group of different name end short circuit of L1_C and L2_C.
When above-mentioned coupling reactor be concatenated into parallel connection power model outfan (i.e. three winding L1_A,
The single terminals of L1_B, L1_C are connected to the outfan of a power model, the other three winding
The single terminals of L2_A, L2_B, L2_C are connected to the outfan of another power model, two windings
Different name connect end X_A, X_B, X_C be connected to load) time, due to winding L1_A and L2_A, L1_B
It is respectively present mutual inductance M with L2_B, L1_C and L2_C, the zero sequence circulation impedance of system can be made relatively to use commonly
Increasing during reactor, the effect of suppression zero sequence circulation becomes apparent from, and makes the current-sharing effect of parallel power module more
Good.And when winding L1_A, L1_B, L1_C, L2_A, L2_B, L2_C have common mode current to flow through
Time, the first iron core column 11 via high magnetic permeability is formed loop by the magnetic flux that common mode current produces, it is achieved to altogether
The suppression of mould electric current.
As in figure 2 it is shown, in the second embodiment of the coupling reactor of the present invention, iron core by upper yoke,
Lower yoke, three second iron core column 22 and first iron core column 21 are constituted, wherein the second iron core column 22
And first iron core column 21 be all connected between upper yoke and lower yoke, and air-gap-free in the first iron core column 21, often
In one second iron core column 22, there is air gap.Above-mentioned second iron core column 22 and the first iron core column 21 be arranged in parallel, and
Three second iron core column 22 are positioned at the same side of the first iron core column 21.
Similarly, each second iron core column 22 includes the upper and lower connected, and upper and lower has respectively
There is air gap.Six windings L1_A, L1_B, L1_C, L2_A, L2_B, L2_C are rotating around being located at three
In second iron core column 22, and two winding L1_A and L2_A, L1_B in same second iron core column 22 and
L2_B, L1_C and L2_C are rotating around the upper and lower being set to the second iron core column 22.Same second iron core column
Winding L1_A and L2_A on 22, L1_B and L2_B, one group of different name end short circuit of L1_C and L2_C.
The zero sequence circulation of the power model that the coupling reactor in the present embodiment can realize parallel connection equally presses down
System, compared with the embodiment in Fig. 1, owing to having lacked first iron core column 21, this coupling reactor
Temperature rise can be of a relatively high.
As it is shown on figure 3, be the schematic diagram of the 3rd embodiment of the coupling reactor of the present invention.This enforcement
Coupling reactor in example include equally iron core and six winding L1_A, L1_B, L1_C, L2_A,
L2_B, L2_C, and above-mentioned iron core includes that (upper yoke, lower yoke are all magnetic conduction material for upper yoke, lower yoke
Material) and lay respectively at the first iron core column 31 of two air-gap-free between upper yoke and lower yoke and three
There is the second iron core column 32 of air gap.Three second iron core column 32 be arranged in parallel with two first iron core column 31, and
Three second iron core column 32 are all located between two first iron core column 31.
Six windings L1_A, L1_B, L1_C, L2_A, L2_B, L2_C in the present embodiment rotating around
It is located in three second iron core column 32 (each second iron core column 32 is arranged with two windings), and same second
Two winding L1_A and L2_A, L1_B and L2_B, L1_C and L2_C in iron core column 32 use and around side
Formula is around being set to same section of the second iron core column 32.Winding L1_A and L2_A in same second iron core column 32,
L1_B and L2_B, one group of different name end short circuit of L1_C and L2_C.
The zero sequence circulation of the power model that the coupling reactor in the present embodiment can realize parallel connection equally presses down
System, compared with Fig. 1, embodiment in 2, its volume can be substantially reduced.
As shown in Figure 4, in the 4th embodiment of the coupling reactor of the present invention, iron core by upper yoke,
Lower yoke, three second iron core column 42 and first iron core column 41 are constituted, wherein the second iron core column 42
And first iron core column 41 be all connected between upper yoke and lower yoke, and air-gap-free in the first iron core column 41, often
In one second iron core column 42, there is air gap.Above-mentioned second iron core column 42 and the first iron core column 41 be arranged in parallel, and
Three second iron core column 42 are positioned at the same side of the first iron core column 41.
Each second iron core column 42 in the present embodiment uses equally and is arranged with two windings around mode, and should
One group of different name end short circuit of two windings.
The zero sequence circulation of the power model that the coupling reactor in the present embodiment can realize parallel connection equally presses down
System, compared with the embodiment in Fig. 3, owing to having lacked first iron core column 31, this coupling reactor
Temperature rise can be of a relatively high.
Above-mentioned coupling reactor may be directly applied to include the unsteady flow of the power model of at least two parallel connection
Device.Now, this current transformer also includes the coupling reactor being concatenated into the outfan of power model, and should
Coupling reactor includes iron core and six windings, and wherein iron core includes upper yoke, lower yoke, Yi Jifen
Not the first iron core column of at least air-gap-free between described upper yoke and lower yoke and three have gas
Second iron core column of gap；Rotating around being provided with two windings in each described second iron core column, and same second ferrum
One group of different name end short circuit of two windings on stem stem；The short circuit of two windings in same second iron core column
Different name end is connected respectively to a power mould as the independent different name end of the outfan of current transformer, each winding
The outfan of block.
In above-mentioned current transformer, each second iron core column includes the upper and lower connected, and top and under
Portion is respectively provided with air gap；Two windings in this second iron core column are rotating around being located at upper and lower.Additionally,
The first winding and the second winding in each second iron core column also can be wound on the same of this second iron core column side by side
On one section.
Above-mentioned iron core can include the first iron core column of two air-gap-free, and the first iron core column is parallel with the second iron core column
Arrange and three second iron core column are between the first iron core column of two air-gap-free.Additionally, iron core also can be only
Including first iron core column, and the first iron core column and the second iron core column be arranged in parallel, three second iron core column
It is positioned at the same side of the first iron core column.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention not office
Being limited to this, any those familiar with the art, can be easily in the technical scope that the invention discloses
The change expected or replacement, all should contain within protection scope of the present invention.Therefore, the protection of the present invention
Scope should be as the criterion with scope of the claims.
Claims (10)
1. a coupling reactor, it is characterised in that: for being concatenated into two power models in parallel
Outfan, this coupling reactor includes iron core and six windings, described iron core include upper yoke, under
Iron yoke and lay respectively at the first iron core column of at least air-gap-free between described upper yoke and lower yoke
With three the second iron core column having air gap；Rotating around being provided with two windings in each described second iron core column, and
One group of different name end short circuit of two windings in same second iron core column；In described second iron core column one around
The single terminals of group are for connecting the outfan of a power model, the single wiring of another winding
End is for connecting the outfan of another power model, and the different name of two windings connects end and is used for connecting load.
Coupling reactor the most according to claim 1, it is characterised in that: each described second ferrum
Stem stem includes the upper and lower connected, and described upper and lower is respectively provided with air gap；This second iron core column
On two windings rotating around being located at upper and lower.
Coupling reactor the most according to claim 1, it is characterised in that: same second iron core column
On two windings side by side on be located at this second iron core column same section.
4. according to the coupling reactor according to any one of claim 1-3, it is characterised in that: described
Iron core include the first iron core column of two air-gap-free, described first iron core column and the second iron core column be arranged in parallel and
Described three second iron core column are between the first iron core column of two air-gap-free.
5. according to the coupling reactor according to any one of claim 1-3, it is characterised in that: described
First iron core column and the second iron core column be arranged in parallel, and described three second iron core column are positioned at the first iron core column
The same side.
6. a current transformer, including the power model that at least two is in parallel, it is characterised in that: this current transformer
Also include the coupling reactor being concatenated into the outfan of described power model；Described coupling reactor
Including iron core and six windings, described iron core includes upper yoke, lower yoke and lays respectively at described upper ferrum
First iron core column of at least air-gap-free between yoke and lower yoke and three the second iron core column having air gap；
Rotating around two windings being provided with on two windings, and same second iron core column in each described second iron core column
One group of different name end short circuit；The different name end of the short circuit of two windings in same second iron core column is as current transformer
Outfan, the independent different name end of each winding be connected respectively to the outfan of a power model.
Current transformer the most according to claim 6, it is characterised in that: each described second iron core column includes
The upper and lower connected, and described upper and lower is respectively provided with air gap；In this second iron core column two
Winding is rotating around being located at upper and lower.
Current transformer the most according to claim 6, it is characterised in that: first in same second iron core column
Winding and the second winding are wound on same section of this second iron core column side by side.
9. according to the current transformer according to any one of claim 6-8, it is characterised in that: described iron core includes
First iron core column of two air-gap-free, described first iron core column and the second iron core column be arranged in parallel and described three
Second iron core column is between the first iron core column of two air-gap-free.
10. according to the current transformer according to any one of claim 6-8, it is characterised in that: described first ferrum
Stem stem and the second iron core column be arranged in parallel, and described three second iron core column are positioned at the same of the first iron core column
Side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410306862.7A CN104078195B (en) | 2014-06-30 | 2014-06-30 | three-phase coupling reactor and converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410306862.7A CN104078195B (en) | 2014-06-30 | 2014-06-30 | three-phase coupling reactor and converter |
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| CN104078195A CN104078195A (en) | 2014-10-01 |
| CN104078195B true CN104078195B (en) | 2017-01-11 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882253B (en) * | 2015-04-24 | 2017-12-29 | 上海意兰可电力电子设备有限公司 | Three-phase and four-pole is conjugated reactor |
| EP3255774A1 (en) | 2016-06-07 | 2017-12-13 | GE Energy Power Conversion Technology Ltd | System for converting electric energy supplied by a network and conversion method implemented by means of such a conversion system |
| CN106783059A (en) * | 2016-12-30 | 2017-05-31 | 上海意兰可电力电子设备有限公司 | Three-phase equalizing reactor |
| DE102017110059A1 (en) * | 2017-05-10 | 2018-11-15 | Manfred Schmelzer Gmbh | Multi-phase push-pull power choke |
| CN109036807A (en) * | 2018-09-10 | 2018-12-18 | 安徽兆晟新能源科技有限公司 | A kind of Multiple coil magnetic coupling reactor |
| CN110310801A (en) * | 2019-07-19 | 2019-10-08 | 东莞市大忠电子有限公司 | A kind of integrated three-phase common mode inductance of 5G |
| CN112816840B (en) * | 2021-01-29 | 2023-07-21 | 国网陕西省电力公司电力科学研究院 | Cable line alternating-current withstand voltage test method and system based on three-phase shunt reactor |
| CN112820524A (en) * | 2021-02-04 | 2021-05-18 | 东莞南方半导体科技有限公司 | Multi-phase transformer and rectifier system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE525698C2 (en) * | 2003-06-27 | 2005-04-05 | Forskarpatent I Syd Ab | Transformer with protection against direct current magnetization caused by zero sequence current |
| CN101299375B (en) * | 2008-03-19 | 2010-09-01 | 丹东欣泰电气股份有限公司 | High leakage reactance type level adjustable series iron-core reactor |
| CN201910313U (en) * | 2010-11-23 | 2011-07-27 | 上海意兰可电力电子设备有限公司 | Three-phase four-column reactor |
| CN102208245B (en) * | 2011-02-24 | 2013-02-20 | 中国科学院电工研究所 | Magnetic saturation type single-phase controllable reactor |
| CN102545677B (en) * | 2012-02-15 | 2014-04-02 | 哈尔滨工业大学 | Parallel three-phase grid-connected inverter adopting mutual reactors and control method for three-phase grid-connected inverter |
| CN103219742B (en) * | 2013-03-19 | 2015-08-12 | 深圳市汇川技术股份有限公司 | Three-phase grid-connected inverter |
| CN103595367B (en) * | 2013-11-07 | 2017-03-08 | 华为技术有限公司 | A kind of magnetic integrated device and a kind of circuit for power conversion |
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