CN106533162A - Novel DC-DC converter - Google Patents
Novel DC-DC converter Download PDFInfo
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- CN106533162A CN106533162A CN201510583591.4A CN201510583591A CN106533162A CN 106533162 A CN106533162 A CN 106533162A CN 201510583591 A CN201510583591 A CN 201510583591A CN 106533162 A CN106533162 A CN 106533162A
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- arm unit
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Abstract
The invention provides a novel DC-DC converter which comprises a first bridge arm unit, a second bridge arm unit, a third bridge arm unit, a fourth bridge arm unit, a first reactor and a second reactor, wherein the first bridge arm unit and the second bridge arm unit access to a low-voltage side dc source, the third bridge arm unit and the fourth bridge arm unit access to a high-voltage side dc source, the first bridge arm unit is connected with the second bridge arm unit in series, the third bridge arm unit is connected with the fourth bridge arm unit in series, the other end of the first bridge arm unit is connected with the other end of the third bridge arm unit through the first reactor, the other end of the second bridge arm unit is connected with the other end of the fourth bridge arm unit through the second reactor, and the connecting ends of the first bridge arm unit and the second bridge arm unit are directly connected with the connecting ends of the third bridge arm unit and the fourth bridge arm unit. Compared with the prior art, the novel DC-DC converter is low in cost, small in space and wide in transformation ratio scope and is suitable for mediate and large power situations.
Description
Technical field
The present invention relates to electric and electronic technical field, and in particular to a kind of new DC/DC changers.
Background technology
With the progressively application of the multiterminal flexible direct current based on voltage source converter (VSC) and direct current network technology, high electricity is needed
Pressure grade DC/DC changer is grid-connected come the direct current for meeting different voltage levels direct current Power System Interconnections and new forms of energy such as offshore wind-powered electricity generation
Deng high pressure DC/DC energetic interaction application requirements.And current all kinds of DC/DC changers are primarily adapted for use in low-voltage electric energy and become carry over
Close, changer of such as voltage class ranges for below 1kV.At present direct-current transmission voltage is generally in tens kV even hundreds of kV,
Therefore conventional low voltage DC/DC changers are not suitable for high pressure applications.
The patent (CN20140310090.4) of Sun Grow Power Co., Ltd.'s application is related to a kind of DC-to-dc of high no-load voltage ratio and becomes
Parallel operation, but its high side voltage still can not be done height by the pressure restriction of power electronic devices.Alston Technology Co., Ltd
The patent (201180072746.8) of proposition is related to a kind of DC-to-DC converter component, but number of modules that its topology needs
Amount is very big, has both contained submodule, also uses single semiconductor device, therefore its topology complexity, cost and volume are not also very managed
Think.ABB T ＆ D Technology Ltd. propose patent (CN201180072949.7) be related to it is a kind of based on concatenation unit it is two-way non-every
From DC-DC converter, Power Exchange between two direct voltage sources is realized by circuit inner loop alternating current, but which is low
Pressure outlet side needs to configure a differential mode voltage wave filter, to realize stablizing for low-pressure side DC voltage.Therefore, need badly and will provide
A kind of low cost, space are little, no-load voltage ratio wide ranges, it is adaptable to the DC/DC changers of middle large-power occasions.
The content of the invention
In order to meet the needs of prior art, the invention provides a kind of new DC/DC changers.
The technical scheme is that：
The changer includes the first bridge arm unit, the second bridge arm unit, the 3rd bridge arm unit, four bridge legs unit, first electric
Anti- device and the second reactor；First bridge arm unit and the second bridge arm unit access low-pressure side DC source, the 3rd bridge arm
Unit and four bridge legs unit access high-pressure side DC source；
First bridge arm unit is connected with the second bridge arm unit, and the 3rd bridge arm unit is connected with four bridge legs unit；
The connection end of first bridge arm unit and the second bridge arm unit, and the 3rd bridge arm unit and four bridge legs unit
Connection end is joined directly together；
The other end of first bridge arm unit is connected with the other end of the 3rd bridge arm unit by the first reactor；Second bridge
The other end of arm unit is connected with the other end of four bridge legs unit by the second reactor.
Preferably, first bridge arm unit and the second bridge arm unit include first power modules；
First power modules include capacitor, and first power device and the second power device of series connection；The electric capacity
Device is connected in parallel on the two ends of the first power device and the second power device；
Preferably,
In first bridge arm unit, the first power device accesses the positive pole of low-pressure side DC source, the second power device and the second bridge
The first power device connection of arm unit；In second bridge arm unit, the second power device accesses the negative pole of low-pressure side DC source；
In first bridge arm unit of one end access of first reactor between the first power device and the second power device, the other end
Access the positive pole of high-pressure side DC source；
In second bridge arm unit of one end access of second reactor between the first power device and the second power device, the other end
Access the negative pole of high-pressure side DC source；
Preferably, first bridge arm unit and the second bridge arm unit include first power modules and N number of second power
Submodule, N are at least 1；
First power modules include capacitor, and first power device and the second power device of series connection；The electric capacity
Device is connected in parallel on the two ends of the series arm of the first power device and the second power device composition；
In first bridge arm unit, the first power device accesses the positive pole of low-pressure side DC source, the second power device and the second bridge
The first power device connection of arm unit；The first order is constituted after N number of second power modules cascade in first bridge arm unit
Connection branch road；One end of first cascaded-branch is accessed between the first power device and the second power device, and the other end is electric with first
Anti- device connection；The other end of first reactor accesses the positive pole of high-pressure side DC source；
In second bridge arm unit, the second power device accesses the negative pole of low-pressure side DC voltage；In second bridge arm unit
The second cascaded-branch is constituted after each second power modules cascades of N；Access the first power device in one end of second cascaded-branch
Between the second power device, the other end is connected with the second reactor；The other end of second reactor accesses high-pressure side direct current
The negative pole of power supply；
Preferably, the 3rd bridge arm unit and four bridge legs unit include at least one second power modules；
Preferably, second power modules are any one in half-bridge power submodule and H bridge power modules.
Compared with immediate prior art, the excellent effect of the present invention is：
1st, a kind of new DC/DC changers that the present invention is provided, it is only necessary to which a small amount of power modules are capable of achieving DC/DC conversion,
Little, loss of standing is little；
2nd, a kind of new DC/DC changers that the present invention is provided, can simply realize the various no-load voltage ratios such as large velocity ratio, little no-load voltage ratio
The conversion of the DC/DC of DC voltage；
3rd, a kind of new DC/DC changers that the present invention is provided, based on modular multilevel scheme, modular multilevel technology
All it is widely used in fields such as flexible DC power transmission, chain types STATACOM, technology is more ripe, therefore the technology for communicating
Easily use for reference and be applied in high pressure DC/DC changers；
4th, a kind of new DC/DC changers that the present invention is provided, structure novel, control are simple, using flexible, equipment cost
Low, withstanding voltage grade is high, and is readily extended to different voltage levels direct current electrical networks, comprising traditional extra-high voltage direct-current electrical network,
Suitable for the grid-connected occasion of the new forms of energy direct current such as wind-powered electricity generation.
Description of the drawings
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1：A kind of new DC/DC transformer configurations schematic diagram in the embodiment of the present invention；
Fig. 2：Second power modules structural representation in the embodiment of the present invention；
Fig. 3：Another second power modules structural representation in the embodiment of the present invention；
Fig. 4：First power modules structural representation in the embodiment of the present invention；
Wherein, 1：First bridge arm unit；2：Second bridge arm unit；3：3rd bridge arm unit；4：Four bridge legs unit；5：
First power modules；6：Second power modules；7：First reactor；8：Second reactor.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, it is wherein identical from start to finish or
Similar label represents same or similar element or the element with same or like function.Below with reference to Description of Drawings
Embodiment is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
The embodiment of a kind of new DC/DC changers that the present invention is provided is as shown in figure 1, be specially：
In the present embodiment new DC/DC changers include the first bridge arm unit 1, the second bridge arm unit 2, the 3rd bridge arm unit 3,
Four bridge legs unit 4, the first reactor 7 and the second reactor 8.Wherein,
①：First bridge arm unit 1 and the second bridge arm unit 2 access low-pressure side DC source Vin, the 3rd bridge arm unit 3 and the
Four bridge legs unit 4 accesses high-pressure side DC source Vout.First bridge arm unit 1 is connected with the second bridge arm unit 2, the 3rd bridge arm
Unit 3 is connected with four bridge legs unit 4.
②：The other end of the first bridge arm unit 1 is connected with the other end of the 3rd bridge arm unit 3 by the first reactor 7；Second
The other end of bridge arm unit 2 is connected with the other end of four bridge legs unit 4 by the second reactor 7.
③：The junction point of the first bridge arm unit 1 and the second bridge arm unit 2, and the 3rd bridge arm unit 3 and four bridge legs unit
4 junction point is joined directly together.
1st, the first bridge arm unit and the second bridge arm unit
In the present embodiment, the first bridge arm unit 1 is identical with the structure of the second bridge arm unit 2, including two kinds of topological structure.
(1) the first topological structure
First bridge arm unit 1 and the second bridge arm unit 2 include first power modules 5.
As shown in figure 4, the first power modules 5 include capacitor, and first power device and the second power device of series connection；
Capacitor is connected in parallel on the two ends of the series arm of the first power device and the second power device composition.
In first bridge arm unit, 1 first power device accesses the positive pole of low-pressure side DC source, the second power device and the second bridge arm
The first power device connection of unit；In second bridge arm unit 2, the second power device accesses the negative pole of low-pressure side DC source.
In first bridge arm unit 1 of one end access of the first reactor 7 between first power device and the second power device, the other end
Access the positive pole of high-pressure side DC source；
In second bridge arm unit 2 of one end access of the second reactor 8 between first power device and the second power device, the other end
Access the negative pole of high-pressure side DC source.
(2) second topological structure
First bridge arm unit 1 and the second bridge arm unit 2 include first power modules and N number of second power modules,
N is at least 1.
As Figure 1-3, in the first bridge arm unit 1, the first power device accesses the positive pole of low-pressure side DC source, the second power
Device is connected with the first power device of the second bridge arm unit；
The first cascaded-branch is constituted after N number of second power modules cascade in first bridge arm unit 1；The one of first cascaded-branch
Terminate between the first power device and the second power device, the other end is connected with the first reactor；The other end of the first reactor
Access the positive pole of high-pressure side DC source.
In second bridge arm unit 2, the second power device accesses the negative pole of low-pressure side DC voltage；
The second cascaded-branch is constituted after each second power modules cascades of N in second bridge arm unit 2；The one of second cascaded-branch
Terminate between the first power device and the second power device, the other end is connected with the second reactor；The other end of the second reactor
Access the negative pole of high-pressure side DC source.
In the present embodiment, the 3rd bridge arm unit and four bridge legs unit include at least one second power modules.Second power
Module is any one in half-bridge power submodule and H bridge power modules.
Power device in the present embodiment adopts all-controlling power electronics device, such as IGBT, IGCT, IEGT and GTO etc..
The operation principle of a kind of new DC/DC changers that the present invention is provided is：
First bridge arm unit 1 produces a forward biased periodic waveform U1, and the 3rd bridge arm unit 3 also produces forward bias
The periodic waveform U2 for putting, U1 are consistent with the waveform of U2, but phase place can be with difference.By adjusting the phase place of U1 and U2
Difference, realizes the two-way flow of reactor current, and then realizes the exchange of high-pressure and low-pressure both sides electric energy.Equally, the second bridge arm unit
2 and four bridge legs unit 4 also by produce phase-adjustable waveform U3 and U4, realize the exchange of high-pressure and low-pressure both sides electric energy.
In order to ensure on high-tension side output DC voltage stability, therefore, to assure that be equal to high-pressure side target voltage in the most of the time of U2+U4
Value.
By the capacitor voltage balance algorithm judged based on the sense of current in the present embodiment, each power modules in bridge arm are realized
Capacitance voltage is close to consistent.The second power modules in first bridge arm unit 1 and the second bridge arm unit 2 are necessary to ensure that the monocycle
Interior discharge and recharge is basically identical, just can guarantee that the stable operation of DC/DC changers, by adjusting waveform and then controlling charge/discharge electricity
Stream, realizes the energy balance of the second power modules.
Finally it should be noted that：Described embodiment is only some embodiments of the present application, rather than the embodiment of whole.
Based on the embodiment in the application, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
His embodiment, belongs to the scope of the application protection.
Claims (6)
1. a kind of new DC/DC changers, it is characterised in that the changer includes the first bridge arm unit, the second bridge arm list
Unit, the 3rd bridge arm unit, four bridge legs unit, the first reactor and the second reactor；First bridge arm unit and the second bridge
Arm unit accesses low-pressure side DC source, and the 3rd bridge arm unit and four bridge legs unit access high-pressure side DC source；
First bridge arm unit is connected with the second bridge arm unit, and the 3rd bridge arm unit is connected with four bridge legs unit；
The connection end of first bridge arm unit and the second bridge arm unit, and the 3rd bridge arm unit and four bridge legs unit
Connection end is joined directly together；
The other end of first bridge arm unit is connected with the other end of the 3rd bridge arm unit by the first reactor；Second bridge
The other end of arm unit is connected with the other end of four bridge legs unit by the second reactor.
2. new DC/DC changers as claimed in claim 1, it is characterised in that first bridge arm unit and the second bridge
Arm unit includes first power modules；
First power modules include capacitor, and first power device and the second power device of series connection；The electric capacity
Device is connected in parallel on the two ends of the first power device and the second power device.
3. new DC/DC changers as claimed in claim 2, it is characterised in that
In first bridge arm unit, the first power device accesses the positive pole of low-pressure side DC source, the second power device and the second bridge
The first power device connection of arm unit；In second bridge arm unit, the second power device accesses the negative pole of low-pressure side DC source；
In first bridge arm unit of one end access of first reactor between the first power device and the second power device, the other end
Access the positive pole of high-pressure side DC source；
In second bridge arm unit of one end access of second reactor between the first power device and the second power device, the other end
Access the negative pole of high-pressure side DC source.
4. new DC/DC changers as claimed in claim 1, it is characterised in that first bridge arm unit and the second bridge
Arm unit includes first power modules and N number of second power modules, and N is at least 1；
First power modules include capacitor, and first power device and the second power device of series connection；The electric capacity
Device is connected in parallel on the two ends of the series arm of the first power device and the second power device composition；
In first bridge arm unit, the first power device accesses the positive pole of low-pressure side DC source, the second power device and the second bridge
The first power device connection of arm unit；The first order is constituted after N number of second power modules cascade in first bridge arm unit
Connection branch road；One end of first cascaded-branch is accessed between the first power device and the second power device, and the other end is electric with first
Anti- device connection；The other end of first reactor accesses the positive pole of high-pressure side DC source；
In second bridge arm unit, the second power device accesses the negative pole of low-pressure side DC voltage；In second bridge arm unit
The second cascaded-branch is constituted after each second power modules cascades of N；Access the first power device in one end of second cascaded-branch
Between the second power device, the other end is connected with the second reactor；The other end of second reactor accesses high-pressure side direct current
The negative pole of power supply.
5. new DC/DC changers as claimed in claim 1, it is characterised in that the 3rd bridge arm unit and the 4th bridge
Arm unit includes at least one second power modules.
6. new DC/DC changers as described in claim 4 or 5, it is characterised in that second power modules are
In half-bridge power submodule and H bridge power modules any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510583591.4A CN106533162B (en) | 2015-09-14 | 2015-09-14 | A kind of DC/DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510583591.4A CN106533162B (en) | 2015-09-14 | 2015-09-14 | A kind of DC/DC converter |
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| CN106533162A true CN106533162A (en) | 2017-03-22 |
| CN106533162B CN106533162B (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510583591.4A Active CN106533162B (en) | 2015-09-14 | 2015-09-14 | A kind of DC/DC converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306500A (en) * | 2018-01-10 | 2018-07-20 | 中国科学院电工研究所 | A kind of high pressure DC-DC converter |
| CN109728720A (en) * | 2019-01-22 | 2019-05-07 | 哈尔滨工业大学 | Bipolar DC/DC converter and its control method for flexible DC transmission |
| CN111900886A (en) * | 2020-07-07 | 2020-11-06 | 哈尔滨工业大学 | Flexible direct current transmission converter |
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| JP2010148302A (en) * | 2008-12-22 | 2010-07-01 | Mitsubishi Electric Corp | Dc/dc power converter |
| CN101867313A (en) * | 2010-06-21 | 2010-10-20 | 清华大学 | Cascade current converter |
| CN103633845A (en) * | 2013-12-19 | 2014-03-12 | 国家电网公司 | DC-DC (Direct-Current-Direct-Current) converter |
| CN104638930A (en) * | 2014-12-30 | 2015-05-20 | 国家电网公司 | High-voltage large-capacity DC/DC (Direct Current) converter suitable for DC power supply |
| CN204376517U (en) * | 2015-01-06 | 2015-06-03 | 安徽理工大学 | A kind of bidirectional DC-DC converter for direct current network energy storage |
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2015
- 2015-09-14 CN CN201510583591.4A patent/CN106533162B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010148302A (en) * | 2008-12-22 | 2010-07-01 | Mitsubishi Electric Corp | Dc/dc power converter |
| CN101867313A (en) * | 2010-06-21 | 2010-10-20 | 清华大学 | Cascade current converter |
| CN103633845A (en) * | 2013-12-19 | 2014-03-12 | 国家电网公司 | DC-DC (Direct-Current-Direct-Current) converter |
| CN104638930A (en) * | 2014-12-30 | 2015-05-20 | 国家电网公司 | High-voltage large-capacity DC/DC (Direct Current) converter suitable for DC power supply |
| CN204376517U (en) * | 2015-01-06 | 2015-06-03 | 安徽理工大学 | A kind of bidirectional DC-DC converter for direct current network energy storage |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306500A (en) * | 2018-01-10 | 2018-07-20 | 中国科学院电工研究所 | A kind of high pressure DC-DC converter |
| CN108306500B (en) * | 2018-01-10 | 2020-06-19 | 中国科学院电工研究所 | High-voltage DC-DC converter |
| CN109728720A (en) * | 2019-01-22 | 2019-05-07 | 哈尔滨工业大学 | Bipolar DC/DC converter and its control method for flexible DC transmission |
| CN111900886A (en) * | 2020-07-07 | 2020-11-06 | 哈尔滨工业大学 | Flexible direct current transmission converter |
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| CN106533162B (en) | 2019-03-08 |
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