CN106160490A - A kind of dual input list output DC DC changer - Google Patents
A kind of dual input list output DC DC changer Download PDFInfo
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- CN106160490A CN106160490A CN201610510436.4A CN201610510436A CN106160490A CN 106160490 A CN106160490 A CN 106160490A CN 201610510436 A CN201610510436 A CN 201610510436A CN 106160490 A CN106160490 A CN 106160490A
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- shunting
- low
- pressure side
- submodule group
- side inductance
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
- H02M3/3376—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current
- H02M3/3378—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current in a push-pull configuration of the parallel type
-
- 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
- H02M1/0083—Converters characterised by their input or output configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention proposes a kind of dual input list output DC DC changer based on modular multilevel DC dc converter topology, comprises shunting brachium pontis, the first low tension potential source, the second low tension potential source, high-pressure side inductance, the first low-pressure side inductance, the second low-pressure side inductance, High voltage output load.This structure is based on voltage, electric current superposition theorem, by increasing the extra voltage source having independence to control input voltage flexibly.Article two, described shunting brachium pontis constitutes secondary power ring, in order to carry AC compounent distribute in ring power with formed dividing potential drop equilibrium, described shunting brachium pontis and High voltage output load formed primary power ring, in order to transmit dc power.
Description
Technical field
The present invention relates to field of power electronics, particularly relate to a kind of dual input list based on push-pull type M2DC topological structure defeated
Go out DC-DC converter.
Background technology
Modular multilevel converter has been achieved for important application in power transmits, and is to become middle pressure neutral point to clamp down on
The well-matched replacer of three-level converter.Link between exchange and exchange at present also exists much inconvenience and hidden danger,
So the today propagated its belief on a large scale for direct current transmission, the DC-DC converter on the basis of Modular multilevel converter is more worth
Must study.Modular multilevel converter is the changer mode of rising in recent years, because its modular topology used can
To adjust electric pressure easily by the number of variations of submodule, can also move smoothly in the case of keeping changer to run
Half-bridge except fault.Because the voltage of each unit is clamped down on, it is not required that synchronous timer is replaced.Modular multilevel becomes
Parallel operation uses half-bridge or the full-bridge submodule of capacitor.
Push-pull type modular multilevel DC-DC converter is to convert field based on Modular multilevel converter at DC-DC
A kind of New Topological.It utilizes the orthogonality of power between different frequency to make power have mutual turning between direct current and exchange
The method changed.But DC-DC converter of the prior art is the structure of single-input single-output, input mode is single, it is impossible to
Meet the access requirement of additional input source.When such as wind-power electricity generation and solar electrical energy generation can serve as power supply input, existing skill
Art can only be selected one and be arranged input.
Summary of the invention
The technical problem to be solved in the present invention is to increase the degree of freedom of input source in many level DC-DC converters, from
And can control output end voltage more neatly, and distribute trend.Single input can be used, it is possible to use dual input, make
Obtain system stability and motility is promoted.Two input sources of the present invention are separate, do not interfere with each other, it is possible to use the most not
Identical energy source carries out low-voltage direct input.Such as when wind-power electricity generation and solar electrical energy generation can serve as power supply input
Use two input sources, take full advantage of the existing energy single output.
The present invention provides a kind of dual input list output DC-DC converter based on push-pull type M2DC topological structure, comprises point
Stream brachium pontis, the first low tension potential source, the second low tension potential source, high-pressure side inductance, the first low-pressure side inductance, the second low-pressure side electricity
Sense, High voltage output load;
Described shunting brachium pontis includes top shunting submodule group, bottom, top shunting submodule group, the bottom being serially connected
Bottom shunting submodule group;Being connected with bottom, top shunting submodule group of the top shunting submodule group of two described brachium pontis
One end is connected by described first low-pressure side inductance, and the other end is connected by described high-pressure side inductance, under two described brachium pontis
One end that shunting submodule group in bottom, portion is connected with bottom, top shunting submodule group is connected by described second low-pressure side inductance,
The other end is joined directly together;
The load of described High voltage output is accessed between described high-pressure side inductance centre cap and ground,
Described first low pressure is accessed between the centre cap of described first low-pressure side inductance and described second low-pressure side inductance
Voltage source,
And/or between described second low-pressure side inductance centre cap and ground, access described second low tension potential source, described
One low tension potential source and described second low tension potential source are separate;
Article two, described shunting brachium pontis constitutes secondary power ring, distributes power to be formed in order to carry AC compounent in ring
Dividing potential drop equalizes, and described shunting brachium pontis and High voltage output load form primary power ring, in order to transmit dc power.
As a kind of prioritization scheme, described top shunting submodule group, bottom, top shunting submodule group, lower bottom end are divided
Stream submodule group the most all includes: one or more capacitor half bridge switching circuit submodules being serially connected.
As a kind of prioritization scheme, described top shunting submodule group, bottom, top shunting submodule group, lower bottom end are divided
Stream submodule group the most all includes: the full-bridge circuit submodule of one or more capacitor being serially connected.
As a kind of prioritization scheme, described top shunting submodule group, bottom, top shunting submodule group, lower bottom end are divided
Stream submodule group the most all includes: the electric capacity full-bridge circuit submodule of one or more band transformators being serially connected.
The key protection point that closes of the present invention is that a kind of dual input list based on push-pull type modular multilevel DC converter is defeated
Go out DC-DC converter structure.It adds another one voltage source V between original low-pressure side input source and groundlow1With defeated
Enter inductance Llow1Topological structure be that the present invention proposes for the first time.Can add on the basis of keeping Passive Power conversion
New input source Vlow1.Confirm input inductance when two bridge arm current, 180 ° of angular differences each other, alternating current component difficultly flows into
Input source or output source, it is ensured that the waveform of input and output direct current to a certain extent, and from principle, confirm two inputs
Source Vlow1、Vlow2Mutual independence.The present invention propose a kind of new dual input list output DC-DC converter, the method based on
Push-pull type M2DC topological structure, by this structure based on voltage, electric current superposition theorem, by increasing the extra independence that has
Voltage source is to control input voltage flexibly.And by screening control program, obtain good control effect.
Accompanying drawing explanation
Fig. 1 is the dual input list output DC-DC converter topological structure that the present invention realizes;
Fig. 2 is the submodule concrete structure in converter topology of the present invention;
Fig. 3 is inverter power of the present invention flowing signal;
Fig. 4 is the principle of equal effects of changer submodule of the present invention;
Fig. 5 (a) and 5 (b) are the control block diagrams that changer of the present invention uses;
Fig. 6 (a), 6 (b), 6 (c), 6 (d) and 6 (e) are changer output voltage waveform of the present invention, the first low pressure respectively
Voltage source voltage oscillogram, the first low tension potential source filtering voltage oscillogram, the second low tension potential source voltage oscillogram and second
Low tension potential source filtering voltage oscillogram.
In figure: Vlow1-the first low tension potential source, Vlow2-the second low tension potential source, Lhigh-high-pressure side inductance, Llow1-the first
Low-pressure side inductance, Llow2-the second low-pressure side inductance, Vhigh-High voltage output loads.
Detailed description of the invention
Below in conjunction with accompanying drawing, in the way of specific embodiment, the present invention is described in detail.Following example will assist in
Those skilled in the art is further appreciated by the present invention, but limits the present invention the most in any form.It should be pointed out that, it is all right
Use other embodiment, or the embodiment enumerated herein is carried out amendment structurally and functionally, without departing from this
Bright scope and spirit
The invention provides a kind of dual input list output DC-DC based on push-pull type modular multilevel DC-DC topology to become
Parallel operation, it comprises at least one independent of the low tension potential source of push-pull type modular multilevel DC-DC converter input and use
To connect additional electric potential source and the coupling inductance of original voltage source and in parallel with additional electric potential source by inductance, and script two
The shunting submodule string that individual brachium pontis is in series.As depicted in figs. 1 and 2, a kind of dual input list output DC-DC converter, comprise point
Stream brachium pontis, the first low tension potential source Vlow1, the second low tension potential source Vlow2, high-pressure side inductance Lhigh, the first low-pressure side inductance
Llow1, the second low-pressure side inductance Llow2, High voltage output supported Vhigh;
Described shunting brachium pontis includes top shunting submodule group, bottom, top shunting submodule group, the bottom being serially connected
Bottom shunting submodule group;Being connected with bottom, top shunting submodule group of the top shunting submodule group of two described brachium pontis
One end is connected by described first low-pressure side inductance, and the other end is connected by described high-pressure side inductance, under two described brachium pontis
One end that shunting submodule group in bottom, portion is connected with bottom, top shunting submodule group is connected by described second low-pressure side inductance,
The other end is joined directly together;
The load of described High voltage output is accessed between described high-pressure side inductance centre cap and ground,
Described first low pressure is accessed between the centre cap of described first low-pressure side inductance and described second low-pressure side inductance
Voltage source,
And/or between described second low-pressure side inductance centre cap and ground, access described second low tension potential source, described
One low tension potential source and described second low tension potential source are separate;
Article two, described shunting brachium pontis constitutes secondary power ring, distributes power to be formed in order to carry AC compounent in ring
Dividing potential drop equalizes, and described shunting brachium pontis and High voltage output load form primary power ring, in order to transmit dc power.
As a kind of prioritization scheme, described top shunting submodule group, bottom, top shunting submodule group, lower bottom end are divided
Stream submodule group the most all includes: one or more capacitor half bridge switching circuit submodules being serially connected.
As a kind of prioritization scheme, described top shunting submodule group, bottom, top shunting submodule group, lower bottom end are divided
Stream submodule group the most all includes: the full-bridge circuit submodule of one or more capacitor being serially connected.
As a kind of prioritization scheme, described top shunting submodule group, bottom, top shunting submodule group, lower bottom end are divided
Stream submodule group the most all includes: the electric capacity full-bridge circuit submodule of one or more band transformators being serially connected.
As a kind of embodiment, the making of described dual input list output DC-DC converter comprises the following steps:
S100: choosing if Fig. 2 capacitor half bridge switching circuit is as submodule, other available submodules also have capacitor
Full bridge structure and the electric capacity full bridge structure etc. of band transformator.Structure shown in Fig. 2 is classical capacitor half bridge switching circuit
Structure, this structure exists
S200: these submodules are divided into two brachium pontis in left and right, carry out parallel connection after being connected in series.1-N, upper end submodule
It is designated as 1/2SM1、…、1/2SMN, it is referred to as top shunting submodule.And be designated as from the N+1 submodule to the N+M submodule
1/2SM1、…、1/2SMM, it is referred to as bottom, top shunting submodule.Ensuing K submodule is designated as 1/2SM1、…、1/
2SMK, referred to as lower bottom end shunting submodule.
S300: being connected by high-pressure side inductance by two top shunting submodules of two brachium pontis, bottom, two top is divided
Stream submodule is connected by the first low-pressure side inductance, and two bottom shunting submodules are connected by the second low-pressure side inductance, and will
Its underpart is joined directly together.
S400: access High voltage output load between high-pressure side inductance centre cap and ground, take out at low-pressure side inductance center
The first low tension potential source and the second low tension potential source is accessed between Tou, between the second low-pressure side inductance centre cap and ground.This reality
Execute and example can access any one in described first low tension potential source, the second low tension potential source, another short circuit;Can also first
Low tension potential source, the second low tension potential source all access.
Article S500: two, brachium pontis constitutes secondary power ring, distributes power with formation point in order to carry AC compounent in ring
Pressure equilibrium.Brachium pontis and High voltage output load become primary power ring, in order to transmit dc power.Ultimately form as shown in Figure 1
Topology diagram.
As it is shown on figure 3, the first low tension potential source V of DC terminallow1, the second low tension potential source Vlow2Be optional arbitrary or
The input both accessed.The input current of the first low tension potential source flows up, and is divided into left and right from the first low-pressure side inductance
Two-way.
Ptotal=Plow=Phigh (1)
Plow=VlowIlow (2)
Phigh=VhighIhigh (3)
By formula (1) to formula (3) it is recognised that high voltage side current is less than low-pressure side electric current.According to Kirchhoff's current law (KCL)
Understanding, separation way module in bottom, top necessarily has DC current to pass through, and its direction is to that indicated in the drawings in opposite direction.Again because of high
Pressure side sense of current is identical with figure, so all should there be DC component upwards at top terminals module two ends.Its direction and diagram
Direction is identical.
Voltage according to bottom submodule and the nonuniformity (voltage is contrary with the sense of current) of DC current, bottom submodule
Block will obtain power from direct-current input power supplying.But in the case of consideration is lossless, input power should be completely transmitted to output
End.So, either bottom module or top module, it is in stable operation, and the power of these submodules that circulate should
It is zero.Being readily obtained according to deduction, under system is in steady statue, the voltage on its electric capacity should be stationary value, is charging
Poised state.The secondary power and the primary power sum that flow to submodule should be zero.So saying from this angle, due to secondary merit
The existence of rate ring, the dc power that bottom submodule absorbs has been transferred to top submodule by the AC power circulated in its ring
Block, and it is sent to outfan via high-pressure side inductance.The size of this portion of energy it is appreciated that by formula (4).
Psec=Ptotal-VlowIhigh (4)
Submodule is shunted for lower bottom end, is same reason.
Such as Fig. 4, for simplified model, another brachium pontis is ignored and does not see, actually since symmetric reason, do not examining
In the case of considering alternating component, a single only brachium pontis can also be analyzed.
In the case of dual input, have:
Ptotal=Plow1+Plow2=Phigh (5)
Can be obtained by figure:
Ilow1=Ihigh+I1 (6)
Known high voltage side current is directly to arrive the electric current of outfan.Directly from input 1Vlow1Arrive the energy of outfan
Amount is input 1 voltage and the product of high voltage side current.But it is different, at input 1Vlow1Under also have input
2Vlow2, the energy that it is provided also should be under consideration.
According to superposition theorem it is recognised that work as and only consider an input source 2Vlow2Time, input source 1 can be considered as short circuit.So can
To find out, bottom, the top shunting submodule that input source 1 is in parallel does not have and comes from input source 2Vlow2Electric current pass through.
So, judging from the angle of power, the power that input source 2 arrives entrained by the electric current of outlet side through input source 1 inputs exactly
Source 2Vlow2The power directly provided.Being apparent from, its value is the product of input 2 voltage and high voltage side current.
Therefore, it can obtain:
Psec=Ptotal-Vlow1Ihigh-Vlow2Ilow1=Vlow1I1-Vlow2I2 (7)
It can be seen that secondary power ring still can play a role.And formula (7) also show two of which bottom shunting
Module becomes secondary power ring equally and runs.
Such as Fig. 4, singly see bottom submodule and input power supply and coupling inductance, it can be considered as one approx and rise
Pressure chopper circuit.
Owing to the switch of the upper and lower brachium pontis IGBT in submodule is complementary opportunity, so in actual Boost circuit, on
Brachium pontis IGBT can ignore, only by its reversal connection diode in place (the most not considering electric capacity discharge process) in parallel.Owing to inductance exists
Mean power in one cycle is zero, so its average voltage is zero, can obtain, capacitance voltage VC_bottomThe most permissible
Regard as and bottom submodule output voltage Vbottom_leftThere is a following relation:
Vbottom_left=D VC_bottom (8)
Wherein D is the duty cycle of switching of upper brachium pontis IGBT.
But, because V in formulabottom_leftRefer to the DC component of bottom submodule voltage, and it practice,
vbottom_leftIn should be containing the AC compounent of secondary power ring frequency, and the high fdrequency component formed between switch folding.So
These should account for.
Such as Fig. 5 (a), through two the reference voltage components being added, generation is i.e. the ginseng of whole bottom shunting submodule
Examine voltage.This value and the real-time submodule output voltage measured are compared the departure obtaining bottom submodule voltage.Thus,
Through the regulation of PI controller, thus obtain the dutycycle of whole IGBT switch.Certainly, because upper and lower bridge arm in submodule
IGBT switch is complementary, so, it is only necessary to obtain a dutycycle.
By control block diagram it is known that the generation link shunting submodule exchange reference voltage in bottom is actually antithetical phrase
The control of module capacitance voltage, is the controlling unit of secondary power ring.And for the generation link of DC reference voltage,
It is exactly to primary power ring, the i.e. control of submodule output voltage for bottom shunting submodule, output voltage
Meansigma methods is the same as input voltage source voltage VlowIt can be seen that because input voltage source constant, so,
Need not the effect it being carried out sampling analysis to affect bottom shunting submodule.For this point, top shunting submodule
It is more complicated and difficult.
Due to capacitance voltage be by input voltage source through Boost circuit boost after effect, so compared to can height
Much.So selecting element when, should be noted that what IGBT may bear is the high voltage of electric capacity.It is noted that
Bottom shunting submodule outfan (i.e. descending brachium pontis IGBT two ends) voltage fluctuates between capacitance voltage and no-voltage.Such electricity
Pressure value is directly to be compared to each other with the reference value generated.Therefore, in controlling unit, need the measured value to sampling
Carry out data process.This signal is processed by emulation herein by simulation low-pass filter.It is contemplated that, because through filtering
The voltage waveform of ripple does not haves no-voltage, so the peak value of this waveform will be far below switching and measures, also i other words, filtering
Voltage peak afterwards will be equal to capacitance voltage.
For top shunting submodule, in addition to all pressure measure close with bottom shunting submodule, in addition it is also necessary to root
According to required high side voltage, its output voltage is controlled.Its controller chassis such as Fig. 5 (b).It can be seen that removing reference voltage
The generation of DC component, the IGBT of top shunting submodule controls do not have the biggest difference with bottom shunting submodule.And direct current
The generation of component is the key point controlling whole system circuit success or not.By desired outfan high level and measuring
Actual value compare, thus draw its inclined extent, then the DC component controlling reference value complete the regulation to error.
This also complies with the most original imagination and is controlled output voltage by primary frequency (DC component, i.e. zero-frequency component), and
All pressures of electric capacity are controlled by oneself by secondary frequency (i.e. a-c cycle can be controlled).Actually it can be seen that electric capacity is electric
The control of pressure is individually controlled by each control ring, and this method extensively makes in Modular multilevel converter control circuit
With.Because top shunting submodule parameter is identical, in order to make it can be properly functioning, so each capacitance voltage
Reference value is all difference and the ratio of submodule number that its output voltage deducts input voltage.
After setting input and output voltage, capacitance voltage reference value, inductance parameters etc. circuit parameter, circuit system can
With stable operation.Its output voltage should be intensive low frequency sinusoidal voltage waveform and forms with high frequency sawtooth waveform, more concentrates
Be the switching waveform of no-voltage.Under this waveform, module output voltage is the most identical with the capacitance voltage in its module, and
After after filtering, module output voltage can be much smaller than capacitance voltage, but waveform is smoother sine wave and sawtooth waveforms
Synthesis.Capacitance voltage should be the waveform that one section of fluctuating margin is the least.And export electric current and output voltage should be basically stable at pre-
If parameter on.
For simplicity, in emulation employing table 1 herein, voltage rises than the data i.e. top shunting submodule being 3.3
Block number left and right bridge sum is 4, and the sum of shunting submodule left and right, bottom bridge is 2.The simulation parameter used such as following table institute
Show:
Table 1 push-pull type M2DC simulation parameter
Simulation result displays in accompanying drawing 6 (a), 6 (b), 6 (c), 6 (d) and 6 (e).
The present invention emulates case and is only intended to help to illustrate the present invention.It is all of carefully that emulation case does not has detailed descriptionthe
Joint, is also not intended to the detailed description of the invention that this invention is only described.Obviously, according to the content of this specification, a lot of repairing can be made
Change and change.These embodiments are chosen and specifically described to this specification, is to preferably explain the principle of the present invention and reality
Application, so that skilled artisan can utilize the present invention well.The present invention is only by claims and complete
Portion's scope and the restriction of equivalent.
The foregoing is only presently preferred embodiments of the present invention, those skilled in the art know, in the essence without departing from the present invention
In the case of god and scope, these features and embodiment can be carried out various change or equivalent.It addition, the present invention's
Under teaching, can modify these features and embodiment to adapt to particular situation and material without departing from the present invention's
Spirit and scope.Therefore, the present invention is not limited to the particular embodiment disclosed, and the right of fallen with the application is wanted
Embodiment in the range of asking broadly falls into protection scope of the present invention.
Claims (4)
1. a dual input list output DC-DC converter, it is characterised in that comprise shunting brachium pontis, the first low tension potential source, second
Low tension potential source, high-pressure side inductance, the first low-pressure side inductance, the second low-pressure side inductance, High voltage output load;
Described shunting brachium pontis includes top shunting submodule group, the shunting of bottom, top submodule group, the lower bottom end being serially connected
Shunting submodule group;One end being connected with bottom, top shunting submodule group of the top shunting submodule group of two described brachium pontis
Being connected by described first low-pressure side inductance, the other end is connected by described high-pressure side inductance, the lower bottom of two described brachium pontis
One end that end shunting submodule group is connected with bottom, top shunting submodule group is connected by described second low-pressure side inductance, another
End is joined directly together;
The load of described High voltage output is accessed between described high-pressure side inductance centre cap and ground,
Described first low voltage voltage is accessed between the centre cap of described first low-pressure side inductance and described second low-pressure side inductance
Source,
And/or between described second low-pressure side inductance centre cap and ground, access described second low tension potential source, described first low
Piezoelectricity potential source and described second low tension potential source are separate;
Article two, described shunting brachium pontis constitutes secondary power ring, distributes power to form dividing potential drop in order to carry AC compounent in ring
Equilibrium, described shunting brachium pontis and High voltage output load form primary power ring, in order to transmit dc power.
2. dual input list output DC-DC converter as claimed in claim 1, it is characterised in that described top shunting submodule
Group, bottom, top shunting submodule group, lower bottom end shunting submodule group the most all include: one or more bands being serially connected
Electric capacity half bridge switching circuit submodule.
3. dual input list output DC-DC converter as claimed in claim 1, it is characterised in that described top shunting submodule
Group, bottom, top shunting submodule group, lower bottom end shunting submodule group the most all include: one or more bands being serially connected
The full-bridge circuit submodule of electric capacity.
4. dual input list output DC-DC converter as claimed in claim 1, it is characterised in that described top shunting submodule
Group, bottom, top shunting submodule group, lower bottom end shunting submodule group the most all include: one or more bands being serially connected
The electric capacity full-bridge circuit submodule of transformator.
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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 |
CN104767227A (en) * | 2015-04-18 | 2015-07-08 | 东北电力大学 | Novel bus power flow controller for smart distribution grid power transformation device |
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