CN106849732A - A kind of modularization multi-level converter without bridge arm reactor - Google Patents
A kind of modularization multi-level converter without bridge arm reactor Download PDFInfo
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- CN106849732A CN106849732A CN201710118487.7A CN201710118487A CN106849732A CN 106849732 A CN106849732 A CN 106849732A CN 201710118487 A CN201710118487 A CN 201710118487A CN 106849732 A CN106849732 A CN 106849732A
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- bridge arm
- change
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- current
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The present invention relates to a kind of modularization multi-level converter without bridge arm reactor, belong to technical field of electric automation equipment.Including a three-phase three-winding transformer, first group of change of current bridge arm and second group of change of current bridge arm.Two groups of change of current bridge arms are made up of three change of current bridge arms respectively, first group of positive terminal of three change of current bridge arms is connected as this direct-flow positive pole end, negative pole end is connected respectively to the Same Name of Ends of three-phase three-winding transformer, the negative pole end of second group of three change of current bridge arm is connected together as the direct current negative pole end of modularization multi-level converter, and its positive terminal is connected to the Same Name of Ends of the three-phase vice-side winding of three-phase three-winding transformer.The present invention serves as the bridge arm reactor of modularization multi-level converter using the winding leakage reactance of three winding connection transformer, so that reduce the floor space of modularization multi-level converter, while reducing cost and the loss of modularization multi-level converter.
Description
Technical field
The present invention relates to a kind of modularization multi-level converter without bridge arm reactor, belong to electric automatization equipment and technology
Field.
Background technology
Modularization multi-level converter (MMC transverters) realize multi-level inverse conversion export when, exportable single direct current
Source, thus can be applied to the fields such as soft defeated direct-current transmission converter device, power line DC ice-melting device.Conventional modularization is more
Level converter has three-phase totally six bridge arms, and each bridge arm has a linked reactor, and this six reactors bring larger
Floor space, cost and loss.Because modularization multi-level converter incoming transport power network needs a connection transformation often
Device realizes that ac/dc voltage magnitude is matched, it can be considered to serve as bridge arm reactor using the leakage reactance for connecting transformer, from
And reduce floor space, cost and the loss of modularization multi-level converter.
The content of the invention
The purpose of the present invention is to propose to a kind of modularization multi-level converter without bridge arm reactor, to overcome prior art
Deficiency, the bridge arm reactor of modularization multi-level converter is served as using the winding leakage reactance for connecting transformer, so as to reduce mould
The floor space of block multilevel converter, while reducing cost and the loss of modularization multi-level converter.
Modularization multi-level converter without bridge arm reactor proposed by the present invention, including a three-phase three winding transformation
Device, first group of change of current bridge arm, second group of change of current bridge arm.First group of change of current bridge arm and second group of change of current bridge arm are respectively by three changes of current
Bridge arm is constituted, and it is how electric that first group three the three of change of current bridge arm positive terminals are connected together as the modularization without bridge arm reactor
The direct-flow positive pole end DC+ of flat transverter, first group three the three of change of current bridge arm negative pole ends are connected respectively to the change of three-phase three winding
The Same Name of Ends A1/B1/C1 of first three-phase vice-side winding of depressor, second group three the three of change of current bridge arm negative pole ends are connected to
Together as the direct current negative pole end DC- of the modularization multi-level converter without bridge arm reactor, second group of three change of current bridge arm
Three positive terminals are connected respectively to the Same Name of Ends A2/B2/C2 of second three-phase vice-side winding of three-phase three-winding transformer, three-phase
Two the six of three-phase vice-side winding non-same polarities of three-winding transformer connect together two three-phase vice-side windings of composition
Star contact N；The primary side three-phase windings of three-phase three-winding transformer connect into delta connection and form three-phase alternating current terminals A/B/C
Access power network.
The above-mentioned modularization multi-level converter without bridge arm reactor, wherein described change of current stream arm, including multiple is changed
Flow module, multiple change of current modules are used and are connected in series to form a positive terminal and a negative pole end.
Modularization multi-level converter without bridge arm reactor proposed by the present invention, its advantage is：The present invention using three around
The winding leakage reactance of group connection transformer serves as the bridge arm reactor of modularization multi-level converter, so as to reduce modular multilevel
The floor space of transverter, while reducing cost and the loss of modularization multi-level converter.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the modularization multi-level converter without bridge arm reactor of the invention.
Fig. 2 is the circuit theory of the change of current bridge arm in the modularization multi-level converter without bridge arm reactor shown in Fig. 1
Figure.
Fig. 3 is the H bridge power module circuit schematic diagrams in the change of current bridge arm shown in Fig. 2.
Fig. 4 is the half-bridge power module circuit theory diagrams in the change of current bridge arm shown in Fig. 2.
Specific embodiment
Modularization multi-level converter without bridge arm reactor proposed by the present invention, as shown in figure 1, including a three-phase three
Winding transformer, first group of change of current bridge arm, second group of change of current bridge arm.First group of change of current bridge arm and second group of change of current bridge arm respectively by
Three change of current bridge arm compositions, first group three the three of change of current bridge arm positive terminals are connected together as the mould without bridge arm reactor
The direct-flow positive pole end DC+ of block multilevel converter, first group three the three of change of current bridge arm negative pole ends are connected respectively to three-phase
The Same Name of Ends A1/B1/C1 of first three-phase vice-side winding of three-winding transformer, second group three the three of change of current bridge arm negative poles
End is connected together as the direct current negative pole end DC- of the modularization multi-level converter without bridge arm reactor, and second group three are changed
Three positive terminals of stream bridge arm are connected respectively to the Same Name of Ends A2/ of second three-phase vice-side winding of three-phase three-winding transformer
B2/C2, two the six of three-phase vice-side winding non-same polarities of three-phase three-winding transformer connect together two three-phases of composition
The star contact N of vice-side winding；The primary side three-phase windings of three-phase three-winding transformer connect into delta connection and form three-phase alternating current
Terminals A/B/C accesses power network.
The above-mentioned modularization multi-level converter without bridge arm reactor, wherein described change of current stream arm, as shown in Fig. 2
Including multiple change of current modules, multiple change of current modules are used and are connected in series to form a positive terminal and a negative pole end.
In modularization multi-level converter without bridge arm reactor proposed by the present invention, change of current module can be used such as Fig. 3 institutes
The H bridge power models for showing, it would however also be possible to employ half-bridge power module as shown in Figure 4.Change of current module in any one change of current bridge arm
H bridge power models as shown in Figure 3 a part of can also be used, a part uses half-bridge power module as shown in Figure 4.
Modularization multi-level converter without bridge arm reactor proposed by the present invention, its operation principle is：Change of current bridge arm can
To export controllable alternating-current voltage source and direct voltage source, six change of current bridge arms form total direct voltage source DC+/DC-, while
Three-phase change of current bridge arm divides equally total DC load current；The alternating-current voltage source and three winding transformation produced per mutually upper and lower two bridge arms
The difference of the alternating-current voltage source of device vice-side winding produces alternating current by the leakage reactance of three-phase vice-side winding, so as to by total direct current
Voltage source produce active power be converted into power network exchange exchange active power.Although the DC current of three-phase bridge arm all flows
Two groups of vice-side windings of three-winding transformer have been crossed, but because three-phase dc electric current is produced in two vice-side windings of respective phase
Magnetic flux cancel out each other, thus will not cause transformer core produce D.C. magnetic field bias.Although DC current flows through three winding
The vice-side winding of transformer causes that the total current effective value of vice-side winding increases, but caused transformer cost increases few.
The key of the modularization multi-level converter without bridge arm reactor of the invention be will connect transformer secondary around
Group divide into two groups of stars and connect winding and is connected respectively to upper and lower change of current bridge arm, and act as change of current bridge arm reactance using transformer leakage reactance
Device, and this change does not influence the fundamental characteristics of modularization multi-level converter.The primary side of three-phase three-winding transformer can also
Using star-star connection mode, change of current module can also be using the change of current module topology of other deformations.It is any based on circuit of the present invention
The equivalent transformation circuit made, belongs to protection scope of the present invention.
Claims (2)
1. a kind of modularization multi-level converter without bridge arm reactor, it is characterised in that including a three-phase three winding transformation
Device, first group of change of current bridge arm and second group of change of current bridge arm, described first group of change of current bridge arm and second group of described change of current bridge arm
It is made up of three change of current bridge arms respectively, first group three the three of change of current bridge arm positive terminals are connected together as without bridge arm reactance
The direct-flow positive pole end DC+ of the modularization multi-level converter of device, first group three the three of change of current bridge arm negative pole ends are connected respectively
To the Same Name of Ends A1/B1/C1 of first three-phase vice-side winding of three-phase three-winding transformer, second group three the three of change of current bridge arm
Individual negative pole end is connected together as the direct current negative pole end DC- of the modularization multi-level converter without bridge arm reactor, second group
Three the three of change of current bridge arm positive terminals are connected respectively to the of the same name of second three-phase vice-side winding of three-phase three-winding transformer
End A2/B2/C2, two the six of three-phase vice-side winding non-same polarities of three-phase three-winding transformer connect together composition two
The star contact N of three-phase vice-side winding；The primary side three-phase windings of three-phase three-winding transformer connect into delta connection and form three-phase
AC terminal A/B/C accesses power network.
2. the modularization multi-level converter without bridge arm reactor as claimed in claim 1, it is characterised in that wherein described
Change of current stream arm, including multiple change of current modules, multiple change of current modules are used and are connected in series to form a positive terminal and a negative pole end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710118487.7A CN106849732A (en) | 2017-03-01 | 2017-03-01 | A kind of modularization multi-level converter without bridge arm reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710118487.7A CN106849732A (en) | 2017-03-01 | 2017-03-01 | A kind of modularization multi-level converter without bridge arm reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106849732A true CN106849732A (en) | 2017-06-13 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710118487.7A Withdrawn CN106849732A (en) | 2017-03-01 | 2017-03-01 | A kind of modularization multi-level converter without bridge arm reactor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110719034A (en) * | 2019-11-29 | 2020-01-21 | 清华大学 | Single-phase half-bridge isolated DC transformer without bridge arm reactor |
| CN113364333A (en) * | 2021-04-23 | 2021-09-07 | 南京南瑞继保电气有限公司 | Combined converter, direct current transformer and control method |
| US11437816B2 (en) | 2018-11-27 | 2022-09-06 | Hitachi Energy Switzerland Ag | STATCOM arrangement without phase reactors |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013099054A (en) * | 2011-10-31 | 2013-05-20 | Hitachi Ltd | Power conversion device |
-
2017
- 2017-03-01 CN CN201710118487.7A patent/CN106849732A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013099054A (en) * | 2011-10-31 | 2013-05-20 | Hitachi Ltd | Power conversion device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11437816B2 (en) | 2018-11-27 | 2022-09-06 | Hitachi Energy Switzerland Ag | STATCOM arrangement without phase reactors |
| CN110719034A (en) * | 2019-11-29 | 2020-01-21 | 清华大学 | Single-phase half-bridge isolated DC transformer without bridge arm reactor |
| CN113364333A (en) * | 2021-04-23 | 2021-09-07 | 南京南瑞继保电气有限公司 | Combined converter, direct current transformer and control method |
| CN113364333B (en) * | 2021-04-23 | 2022-07-22 | 南京南瑞继保电气有限公司 | Combined current converter, direct current transformer and control method |
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| PB01 | Publication | ||
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| TA01 | Transfer of patent application right |
Effective date of registration: 20180531 Address after: 100085 floor 107, 2 Building 1, seven street, Haidian District, Beijing. Applicant after: BEIJING QINGTE TECHNOLOGY CENTER (LIMITED PARTNERSHIP) Address before: 100085 room 109, 2 Building 1, seven street, Haidian District, Beijing. Applicant before: BEIJING SINEWELL CONVERTER TECHNOLOGY CO.,LTD. |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20221123 Address after: Room 310, 3rd Floor, Building 5, Yard 1, Nongda South Road, Haidian District, Beijing 100085 Applicant after: BEIJING SINEWELL CONVERTER TECHNOLOGY CO.,LTD. Address before: 100085 floor 107, 2 Building 1, seven street, Haidian District, Beijing. Applicant before: BEIJING QINGTE TECHNOLOGY CENTER (LIMITED PARTNERSHIP) |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170613 |
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| WW01 | Invention patent application withdrawn after publication |