CN205986635U - Reversal parallel operation is handed over to many level of modularization - Google Patents
Reversal parallel operation is handed over to many level of modularization Download PDFInfo
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- CN205986635U CN205986635U CN201620809608.3U CN201620809608U CN205986635U CN 205986635 U CN205986635 U CN 205986635U CN 201620809608 U CN201620809608 U CN 201620809608U CN 205986635 U CN205986635 U CN 205986635U
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Abstract
The utility model provides a reversal parallel operation is handed over to many level of modularization, include the three -phase, wherein, every bridge arm and lower bridge arm of containing is mutually gone up the bridge arm and is included at least one controllable power module and a reactor, controllable power module and reactor series connection respectively with lower bridge arm, go up the one end and the one end connection of bridge arm down of bridge arm, its tie point is as one of three -phase alternating current input end, the other end of the other end of the last bridge arm of phase 1 enzyme and the lower bridge arm of phase 2 enzyme is connected, and its tie point is as one of three -phase AC output, the other end of the other end of the last bridge arm of phase 2 enzyme and the lower bridge arm of third phase is connected, and its tie point is as one of three -phase AC output, the other end of the other end of the last bridge arm of third phase and the lower bridge arm of phase 1 enzyme is connected, and its tie point is as one of three -phase AC output.
Description
Technical field
This utility model is related to electric and electronic technical field and in particular to a kind of modular multilevel hands over AC-AC converter.
Background technology
Oversea wind power generation has the advantages that aboundresources, to be not take up land resource, unit annual utilization hours high, is subject to
Increasing concern.Meanwhile, marine wind electric field offshore distance is more remote, and wind speed is bigger and stable, and output is higher.With
The continuous lifting of the capacity of offshore wind turbine, its exit potential of 8MW blower fan that some blower fan manufacturers produce reaches 6600V, and still
Can raise further with the lifting of fan capacity.
Traditional multi-level converter being applied to Large Copacity Oversea wind power generation grid-connected system, how electric predominantly clamped formula is
Flat changer, this kind of clamped formula multi-level converter sharply increases with the increase of level number, its clamped device, and controls multiple
Miscellaneous, it is not convenient to use.
Utility model content
Therefore, the technical problems to be solved in the utility model is to overcome multi-level converter of the prior art to control again
Miscellaneous defect, thus provide a kind of modular multilevel to hand over AC-AC converter.
For this reason, the technical solution of the utility model is as follows：
A kind of modular multilevel hands over AC-AC converter, including three-phase, wherein, often mutually comprises brachium pontis and lower brachium pontis, described
Upper brachium pontis and described lower brachium pontis include at least one controlled power module and a reactor, described controlled power module respectively
It is connected in series with described reactor；
One end of one end of described upper brachium pontis and described lower brachium pontis connects, its junction point as three-phase alternating current input it
One；
The other end of the described lower brachium pontis of the other end of described upper brachium pontis of the first phase and the second phase connects, and its junction point is made
For one of three-phase alternating current outfan；The other end of the described lower brachium pontis of the other end of described upper brachium pontis of the second phase and third phase is even
Connect, its junction point is as one of three-phase alternating current outfan；The other end of described upper brachium pontis of third phase and the first phase described under
The other end of brachium pontis connects, and its junction point is as one of three-phase alternating current outfan.
Preferably, described controlled power module includes：H bridge current transforming unit and electric capacity C, described H bridge current transforming unit and electric capacity C
It is connected in parallel；The midpoint of described H two brachium pontis of bridge current transforming unit is as two outfans of described controlled power module.
Preferably, described H bridge current transforming unit include the first electronic power switch device, the second electronic power switch device,
3rd electronic power switch device, the 4th electronic power switch device, the first diode, the second diode, the 3rd diode with
And the 4th diode, wherein,
Described first electronic power switch device is connected with described first diodes in parallel；Described second electronic power switch
Device is connected with described second diodes in parallel；Described 3rd electronic power switch device is with described 3rd diodes in parallel even
Connect；Described 4th electronic power switch device is connected with described 4th diodes in parallel；
Described first electronic power switch device and described 3rd electronic power switch devices in series connect；Described second electricity
Power electronic switching device and described 4th electronic power switch devices in series connect；
Described first electronic power switch device after series connection and described 3rd electronic power switch device with connect after
Described second electronic power switch device and described 4th electronic power switch device and described electric capacity C are connected in parallel；
The midpoint of described first electronic power switch device and described 3rd electronic power switch device connection is as described H
One outfan of bridge current transforming unit；Described second electronic power switch device and described 4th electronic power switch device connect
Midpoint as described H bridge current transforming unit another outfan.
Preferably, described modular multilevel hands over AC-AC converter topological structure also to include control module, for controlling
State the output of controlled power module, wherein, the output of described controlled power module includes Three models, and wherein, first mode is
Described controlled power module exports forward voltage；Second mode is output negative voltage；3rd pattern is output no-voltage.
Preferably, when described control module controls described first electronic power switch device and described 4th power electronics to open
When closing break-over of device, described second electronic power switch device and described 3rd electronic power switch device shutoff, described controlled
Power model exports forward voltage.
Preferably, when described control module controls described second electronic power switch device and described 3rd power electronics to open
When closing break-over of device, described first electronic power switch device and described 4th electronic power switch device shutoff, described controlled
Power model exports negative voltage.
Preferably, when described control module controls described first electronic power switch device and described second power electronics to open
When closing break-over of device, described 3rd electronic power switch device and described 4th electronic power switch device shutoff, described controlled
Power model exports no-voltage.
Preferably, when described control module controls described 3rd electronic power switch device and described 4th power electronics to open
When closing break-over of device, described first electronic power switch device and described second electronic power switch device shutoff, described controlled
Power model exports no-voltage.
Technical solutions of the utility model, have the advantage that：
This utility model provide modular multilevel hand over AC-AC converter, include three-phase, wherein, often mutually comprise brachium pontis with
Lower brachium pontis, upper brachium pontis and lower brachium pontis include at least one controlled power module and a reactor, controlled power module respectively
It is connected in series with reactor；One end of one end of upper brachium pontis and lower brachium pontis connects, its junction point as three-phase alternating current input it
One；The other end of the lower brachium pontis of the other end of upper brachium pontis of the first phase and the second phase connects, and its junction point is defeated as three-phase alternating current
Go out one of end；The other end of the lower brachium pontis of the other end of upper brachium pontis of the second phase and third phase connects, and its junction point is as three-phase
One of ac output end；The other end of the lower brachium pontis of the other end of upper brachium pontis of third phase and the first phase connects, and its junction point is made
For one of three-phase alternating current outfan.This modular multilevel hands over the topological structure of AC-AC converter, and the brachium pontis number of employing is less, adopts
Direct-type hands over alternation to change, no middle public direct-current link, and structure is more simple, controls simple, has higher power density.With
When, on the basis of input side, brachium pontis is connected with delta connection, input side often alternate two brachium pontis of all connecting, two brachium pontis midpoints
For output voltage.By controlling each controlled power module switching, brachium pontis cascade module is made to export desired voltage, thus controlling defeated
Enter, outlet side voltage, electric current.Due to symmetry, when on the basis of outlet side, brachium pontis still connects for triangle；Using asterism even
The mode connecing connects brachium pontis, saves power electronic devices and passive device, has saved cost.
Brief description
In order to be illustrated more clearly that this utility model specific embodiment or technical scheme of the prior art, below will be right
In specific embodiment or description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, below describe
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the principle frame of the specific example that modular multilevel hands over AC-AC converter in this utility model embodiment 1
Figure；
Fig. 2 is the tool that in this utility model embodiment 1, modular multilevel hands over controlled power module in AC-AC converter
The theory diagram of body example；
Fig. 3 a-3c is for controlled power module in modular multilevel friendship AC-AC converter in this utility model embodiment 1 not
Schematic diagram with mode of operation；
Reference：The upper brachium pontis of 1- first phase；The upper brachium pontis of 2- second phase；The upper brachium pontis of 3- third phase；4- first phase
Lower brachium pontis；The lower brachium pontis of 5- second phase；The lower brachium pontis of 6- third phase；7- controlled power module.
Specific embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described it is clear that described
Embodiment is a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, this
The every other embodiment that field those of ordinary skill is obtained under the premise of not making creative work, broadly falls into this practicality
Novel protected scope.
In description of the present utility model, " " center ", " on ", D score, "left", "right", " perpendicular it should be noted that term
Directly ", the orientation of instruction such as " level ", " interior ", " outward " or position relationship are based on orientation shown in the drawings or position relationship, are only
For the ease of description this utility model with simplify description, rather than instruction or the hint device of indication or element must have specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or hint relative importance.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " being connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly
Connect；Can be to be mechanically connected or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary,
Can also be the connection of two element internals, can be wireless connection or wired connection.Common skill for this area
For art personnel, concrete meaning in this utility model for the above-mentioned term can be understood with concrete condition.
As long as additionally, involved technical characteristic in this utility model different embodiments disclosed below is each other
The conflict of not constituting just can be combined with each other.
Embodiment 1
As shown in figure 1, the present embodiment provides a kind of modular multilevel to hand over AC-AC converter, including three-phase, wherein, often mutually wrap
Containing upper brachium pontis and lower brachium pontis, upper brachium pontis and lower brachium pontis include at least one controlled power module 7 and a reactor L respectively,
Controlled power module 7 and reactor L are connected in series, and wherein the output voltage of controlled power module 7 can be controlled；Upper brachium pontis
One end of one end and lower brachium pontis connects, and its junction point is as one of three-phase alternating current input (i.e.：One end of the upper brachium pontis of the first phase
Connect with one end of the lower brachium pontis of the first phase, its junction point is as one of three-phase alternating current outfan；The one of the upper brachium pontis of the second phase
One end of the lower brachium pontis of end and the second phase connects, and its junction point is as one of three-phase alternating current outfan；The upper brachium pontis of third phase
One end of the lower brachium pontis of one end and third phase connects, and its junction point is as one of three-phase alternating current outfan；Thus constitute three-phase
Three inputs of exchange)；The other end of the lower brachium pontis 5 of the other end of upper brachium pontis 1 of the first phase and the second phase connects, its connection
Point is as one of three-phase alternating current outfan；The other end of the lower brachium pontis 6 of the other end of upper brachium pontis 2 of the second phase and third phase is even
Connect, its junction point is as one of three-phase alternating current outfan；The lower brachium pontis 4 of the other end of upper brachium pontis 3 of third phase and the first phase
The other end connects, and its junction point is as one of three-phase alternating current outfan；Thus constitute three outfans of three-phase alternating current.
Present embodiments provide a kind of new modular multilevel and hand over AC-AC converter topological structure, this topological structure adopts
Brachium pontis number less, hand over alternation to change using Direct-type, no in the middle of public direct-current link, structure is more simple, controls simple, has
Higher power density.
With reference to Fig. 1, the modular multilevel further describing the present embodiment offer hands over the topological structure of AC-AC converter,
This topological circuit has AU (the upper brachium pontis 1 of the first phase), AW (the lower brachium pontis 4 of the first phase), BV (the upper brachium pontis 2 of the second phase), BU
(the lower brachium pontis 5 of the second phase), CW (the upper brachium pontis 3 of third phase), six brachium pontis of CV (the lower brachium pontis 6 of third phase), AU brachium pontis comprises N
Individual power model and an inductance, connect input side A phase and outlet side U phase using cascade；AW comprises N number of power model
And an inductance, input side A phase and outlet side W phase are connected using cascade；BV comprises N number of power model and an electricity
Sense, connects input side B phase and outlet side V phase using cascade；BU brachium pontis comprises N number of power model and an inductance, adopts
Connect input side B phase and outlet side U phase with cascade；CW comprises N number of power model and an inductance, using cascade
Connect input side C phase and outlet side W phase；CV comprises N number of power model and an inductance, connects input side using cascade
C phase and outlet side V phase.
With reference to Fig. 1, the modular multilevel further describing the present embodiment offer hands over the operation principle of AC-AC converter,
ux, ix(x=a, b, c) is input side phase voltage, electric current；uy, iy(y=u, v, w) is outlet side phase voltage, electric current；ixyFor connecting
Input side x phase, outlet side connects the bridge arm current of y phase.Wherein, each brachium pontis by N number of controlled power module 7 (N be more than or equal to
1 natural number) it is in series with a reactor L.On the basis of input side, brachium pontis is connected with delta connection, and input side is every
Alternate two brachium pontis of all connecting, two brachium pontis midpoints are output voltage.By controlling each controlled power module 7 switching, make brachium pontis level
Gang mould block exports desired voltage, thus control input, outlet side voltage, electric current.Due to symmetry, when on the basis of outlet side
Brachium pontis still connects for triangle.Connect brachium pontis by the way of asterism connects, save power electronic devices and passive device,
Save cost.Changer operation principle is as follows：uxyFor connecting input side x phase, outlet side connects the bridge arm voltage of y phase.For protecting
Card input, outlet side electric current independently do not intercouple, and bridge arm voltage should have following relation：
As a kind of optional embodiment, as shown in Fig. 2 controlled power module 7 can include：H bridge current transforming unit and electricity
Hold C (preferably, electric capacity C can be DC energy storage electric capacity), H bridge current transforming unit and electric capacity C are connected in parallel；H bridge current transforming unit two
The midpoint of individual brachium pontis is as two outfans of controlled power module 7.Wherein, H bridge current transforming unit can include the first electric power electricity
Sub- switching element T 1, the second electronic power switch device T2, the 3rd electronic power switch device T3, the 4th electronic power switch device
Part T4, the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4, wherein, the first power electronics
Switching element T 1 is connected in parallel with the first diode D1；Second electronic power switch device T2 is in parallel with the second diode D2 even
Connect；3rd electronic power switch device T3 and the 3rd diode D3 is connected in parallel；4th electronic power switch device T4 and the 4th
Diode D4 is connected in parallel；First electronic power switch device T1 and the 3rd electronic power switch device T3 is connected in series；Second
Electronic power switch device T2 and the 4th electronic power switch device T4 is connected in series；The first electronic power switch device after series connection
Part T1 and the 3rd electronic power switch device T3 with connect after the second electronic power switch device T2 and the 4th power electronics open
Close device T4 and electric capacity C to be connected in parallel；First electronic power switch device T1 and the 3rd electronic power switch device T3 connects
Midpoint as H bridge current transforming unit an outfan；Second electronic power switch device T2 and the 4th electronic power switch device
The midpoint that part T4 connects is as another outfan of H bridge current transforming unit.
On the basis of such scheme, the modular multilevel that the present embodiment provides hands over AC-AC converter topological structure, also wraps
Include control module, for controlling the output of controlled power module 7, wherein, the output of controlled power module 7 includes Three models,
Wherein, first mode is that described controlled power module exports forward voltage；Second mode is output negative voltage；3rd pattern is
Output no-voltage.It will be understood by those skilled in the art which kind of mode of operation is specifically chosen controlled power module 7 be in,
Can be determined according to input, outlet side command voltage.Apply to Oversea wind power generation occasion when, can be defeated according to current blower fan
Go out operating mode and operation of power networks situation determines changer command voltage, thus controlling the mode of operation of controlled power module 7.Specifically
Ground, three kinds of mode of operations of controlled power module 7 are as follows：
As shown in Figure 3 a, when control module controls the first electronic power switch device T1 and the 4th electronic power switch device
When T4 conducting, the second electronic power switch device T2 and the 3rd electronic power switch device T3 turn off, institute's controlled power module 7 is defeated
Go out forward voltage.
As shown in Figure 3 b, when control module controls the second electronic power switch device T2 and the 3rd electronic power switch device
When T3 conducting, the first electronic power switch device T1 and the 4th electronic power switch device T4 turn off, controlled power module 7 exports
Negative voltage.
As shown in Figure 3 c, when control module controls the first electronic power switch device T1 and the second electronic power switch device
When T2 conducting, the 3rd electronic power switch device T3 and the 4th electronic power switch device (T4) turn off, controlled power module 7 is defeated
Go out no-voltage.Likewise, when control module controls the 3rd electronic power switch device T3 and the 4th electronic power switch device T4
When conducting, the first electronic power switch device T1 and the second electronic power switch device T2 turn off, controlled power module 7 output zero
Voltage.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.Right
For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or
Change.There is no need to be exhaustive to all of embodiment.And the obvious change thus extended out or
Change among the protection domain created still in this utility model.
Claims (8)
1. a kind of modular multilevel hands over AC-AC converter it is characterised in that including three-phase, wherein, often mutually comprise brachium pontis and under
Brachium pontis, described upper brachium pontis and described lower brachium pontis include at least one controlled power module and a reactor (L) respectively, described
Controlled power module and described reactor (L) are connected in series；
One end of one end of described upper brachium pontis and described lower brachium pontis connects, and its junction point is as one of three-phase alternating current input；
The other end of the described lower brachium pontis of the other end of described upper brachium pontis of the first phase and the second phase connects, and its junction point is as three
One of cross streams outfan；The other end of the described lower brachium pontis of the other end of described upper brachium pontis of the second phase and third phase connects,
Its junction point is as one of three-phase alternating current outfan；The other end of described upper brachium pontis of third phase and the described lower brachium pontis of the first phase
The other end connect, its junction point is as one of three-phase alternating current outfan.
2. modular multilevel according to claim 1 hands over AC-AC converter it is characterised in that described controlled power module bag
Include：H bridge current transforming unit and electric capacity C, described H bridge current transforming unit is connected in parallel with electric capacity C；Described two brachium pontis of H bridge current transforming unit
Midpoint as described controlled power module two outfans.
3. modular multilevel according to claim 2 hands over AC-AC converter topological structure it is characterised in that described H bridging
Stream unit includes the first electronic power switch device (T1), the second electronic power switch device (T2), the 3rd electronic power switch
Device (T3), the 4th electronic power switch device (T4), the first diode (D1), the second diode (D2), the 3rd diode
(D3) and the 4th diode (D4), wherein,
Described first electronic power switch device (T1) and described first diode (D1) are connected in parallel；Described second power electronics
Switching device (T2) is connected in parallel with described second diode (D2)；Described 3rd electronic power switch device (T3) and described the
Three diodes (D3) are connected in parallel；Described 4th electronic power switch device (T4) is in parallel with described 4th diode (D4) even
Connect；
Described first electronic power switch device (T1) and described 3rd electronic power switch device (T3) are connected in series；Described
Two electronic power switch devices (T2) and described 4th electronic power switch device (T4) are connected in series；
Described first electronic power switch device (T1) after series connection and described 3rd electronic power switch device (T3) with connect
Rear described second electronic power switch device (T2) and described 4th electronic power switch device (T4) and described electric capacity C are simultaneously
Connection connects；
The midpoint conduct that described first electronic power switch device (T1) and described 3rd electronic power switch device (T3) connect
One outfan of described H bridge current transforming unit；Described second electronic power switch device (T2) and described 4th power electronics are opened
The midpoint that pass device (T4) connects is as another outfan of described H bridge current transforming unit.
4. modular multilevel according to claim 3 hands over AC-AC converter topological structure it is characterised in that also including controlling
Module, for controlling the output of described controlled power module, wherein, the output of described controlled power module includes Three models,
Wherein, first mode is that described controlled power module exports forward voltage；Second mode is output negative voltage；3rd pattern is
Output no-voltage.
5. modular multilevel according to claim 4 is handed over AC-AC converter and is controlled it is characterised in that working as described control module
Described first electronic power switch device (T1) and described 4th electronic power switch device (T4) conducting, described second electric power electricity
When sub- switching device (T2) and described 3rd electronic power switch device (T3) turn off, described controlled power module output is positive electric
Pressure.
6. modular multilevel according to claim 4 is handed over AC-AC converter and is controlled it is characterised in that working as described control module
Described second electronic power switch device (T2) and described 3rd electronic power switch device (T3) conducting, described first electric power electricity
When sub- switching device (T1) and described 4th electronic power switch device (T4) turn off, described controlled power module output negative sense electricity
Pressure.
7. modular multilevel according to claim 4 is handed over AC-AC converter and is controlled it is characterised in that working as described control module
Described first electronic power switch device (T1) and described second electronic power switch device (T2) conducting, described 3rd electric power electricity
When sub- switching device (T3) and described 4th electronic power switch device (T4) turn off, described controlled power module output zero electricity
Pressure.
8. modular multilevel according to claim 4 is handed over AC-AC converter and is controlled it is characterised in that working as described control module
Described 3rd electronic power switch device (T3) and described 4th electronic power switch device (T4) conducting, described first electric power electricity
When sub- switching device (T1) and described second electronic power switch device (T2) turn off, described controlled power module output zero electricity
Pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620809608.3U CN205986635U (en) | 2016-07-28 | 2016-07-28 | Reversal parallel operation is handed over to many level of modularization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107666251A (en) * | 2016-07-28 | 2018-02-06 | 全球能源互联网研究院有限公司 | A kind of modular multilevel hands over AC-AC converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107666251A (en) * | 2016-07-28 | 2018-02-06 | 全球能源互联网研究院有限公司 | A kind of modular multilevel hands over AC-AC converter |
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Address after: 102209 Beijing City, the future of science and Technology City Binhe Road, No. 18, No. Co-patentee after: State Grid Zhejiang Electric Power Company Patentee after: Global energy Internet Institute, Inc. Co-patentee after: State Grid Corporation of China Address before: No. 18, Beiqijia Town, Changping District, Beijing, future science and Technology City Riverside Avenue Co-patentee before: State Grid Zhejiang Electric Power Company Patentee before: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE Co-patentee before: State Grid Corporation of China |
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