CN106301043A - A kind of modular multilevel half-bridge inverter - Google Patents
A kind of modular multilevel half-bridge inverter Download PDFInfo
- Publication number
- CN106301043A CN106301043A CN201610888830.1A CN201610888830A CN106301043A CN 106301043 A CN106301043 A CN 106301043A CN 201610888830 A CN201610888830 A CN 201610888830A CN 106301043 A CN106301043 A CN 106301043A
- Authority
- CN
- China
- Prior art keywords
- switch
- brachium pontis
- half bridge
- submodule
- standard half
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
-
- 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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of modular multilevel half-bridge inverter, each brachium pontis of this inverter all includes that N number of standard half bridge submodule, each standard half bridge submodule include the first switch and second switch；In each upper brachium pontis from DC side to exchange side to 1 standard half bridge submodule of front N and each lower brachium pontis the most also include the 3rd switch from 1 standard half bridge submodule of front N of AC to DC side direction；In upper brachium pontis, the 3rd switch in standard half bridge submodule and the first switch complementary switching in adjacent relatively electronegative potential standard half bridge submodule；In lower brachium pontis, the 3rd switch in standard half bridge submodule and the first switch complementary switching in this module.The present invention, without reducing rated voltage modulation ratio, is greatly improved rated voltage modulation ratio, under identical AC and DC rated voltage, decrease each brachium pontis submodule quantity, greatly reduce cost, make switching loss minimize, reduce the demand of calculating real-time to control system.
Description
Technical field
The present invention relates to inverter technical field, particularly relate to a kind of modular multilevel half-bridge inverter.
Background technology
Modular multilevel half-bridge inverter is applied to mesohigh field more, in order to ensure the modular multilevel half-bridge change of current
Device properly functioning, needs the electric voltage equalization of the submodule in modular multilevel near rated voltage.Refer to Fig. 1 and
Fig. 2, wherein, Fig. 1 is the structural representation of a kind of modular multilevel half-bridge inverter of the prior art, and Fig. 2 provides for Fig. 1
A kind of modular multilevel half-bridge inverter in the structural representation of standard half bridge submodule.Standard half bridge submodule is by two
The electric capacity of voltage regulation at the switch of individual series connection and the two ends of a switch being connected in parallel on series connection is constituted, and wherein, a switch includes one
IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) and anti-paralleled diode thereof.
All pressure schemes require that six brachium pontis of modular multilevel half-bridge inverter all have abundant under any electrical angle
Available input or the standard half bridge submodule of excision.Can be by modular multilevel half-bridge inverter in prior art
Specified modulation ratio selects between 0.8-0.85, but owing to specified modulation ratio is low, thus cause the volume at standard half bridge submodule
Determine voltage certain in the case of the quantity of required standard half bridge submodule many, substantially increase the cost of inverter.Due to existing
Having modularity many level half-bridges inverter in technology can not realize from all pressing, all pressures scheme using it is by by each of which
Standard half bridge submodule on brachium pontis is divided into many groups, takes the mode often organizing rotation conducting to realize all pressing, specifically, by reality
Time gather the capacitance voltage value of each standard half bridge submodule, then carry out the sequence of standard half bridge submodule voltage, further according to brachium pontis
The sense of current determines to put into the submodule that capacitance voltage is on the low side or higher.
But this results in the existing switching frequency all pressing scheme and exceedes power frequency (note: power frequency switching frequency is switch and exists
The operation carrying out on an off in 0.02 second is each once), the typically about power frequency of twice, causes the switching loss of inverter to increase.
Also requiring that control system shorter cycle carries out submodule monitoring voltage and the rotation of standard half bridge submodule, this is to reality simultaneously
Time measure and the reliability of control system and operational capability have higher requirements, under the application that standard half bridge submodule quantity is many,
The operational capability of control system easily becomes bottleneck.
Therefore, how providing a kind of modular multilevel half-bridge inverter solving above-mentioned technical problem is art technology
The problem that personnel are presently required solution.
Summary of the invention
It is an object of the invention to provide a kind of modular multilevel half-bridge inverter, it is not necessary to reduce rated voltage modulation ratio,
Rated voltage modulation ratio is greatly improved, under identical AC and DC rated voltage, decreases each brachium pontis submodule quantity,
Greatly reduce cost.On the other hand, switching frequency is strictly maintained at power frequency, makes switching loss minimize.Finally, due to the change of current
Device submodule achieves nature and all presses, and simplifies modulation algorithm, reduces the demand of calculating real-time to control system.
For solving above-mentioned technical problem, the invention provides a kind of modular multilevel half-bridge inverter, described modularity
Each brachium pontis of many level half-bridges inverter all includes N number of standard half bridge submodule, and N is the integer not less than 2, each described mark
Quasi-semibridge submodule includes the first switch and second switch, in described first switch the emitter stage of IGBT with in described second switch
The colelctor electrode of IGBT connects；
In each upper brachium pontis from DC side to exchange side to front N-1 standard half bridge submodule and each lower brachium pontis
In the most also include the 3rd switch from front N-1 the standard half bridge submodule of AC to DC side direction, in described 3rd switch
The colelctor electrode of IGBT is connected with the colelctor electrode of IGBT in the first switch in this module, the emitter stage of IGBT in described 3rd switch
Connect with the colelctor electrode of IGBT in the first switch in adjacent relatively electronegative potential standard half bridge submodule；On described in brachium pontis, institute
State the 3rd switch in standard half bridge submodule and the first switch complementary switching in adjacent relatively electronegative potential standard half bridge submodule,
In described lower brachium pontis, the 3rd switch in described standard half bridge submodule and the first switch complementary switching in this module.
Preferably, in each brachium pontis, the capacitance near the electric capacity of voltage regulation in the standard half bridge submodule of AC is more than
Near the capacitance of the electric capacity of voltage regulation in the standard half bridge submodule of DC side, and two standard half bridge of arbitrary neighborhood therein
In module, the capacitance of the electric capacity of voltage regulation in the standard half bridge submodule of AC is not less than the standard half bridge near DC side
The capacitance of the electric capacity of voltage regulation in submodule.
Preferably, in each brachium pontis, the N number of electric capacity of voltage regulation in N number of standard half bridge submodule is divided into M group, and wherein, M is
Integer more than 2 and less than N, is followed successively by first group, second group from AC to DC side direction ... until M group, often in group
The capacitance of electric capacity of voltage regulation equal, wherein, the capacitance of the electric capacity of voltage regulation in capacitance ＞ of electric capacity of voltage regulation second group in first group
>=.... the capacitance of the electric capacity of voltage regulation in the >=the M group.
Preferably, M takes 4.
Preferably, M takes 5.
Preferably, each standard half bridge submodule of each brachium pontis also includes:
The voltage regulation resistance in parallel with described electric capacity of voltage regulation；
Just synchronize the when of the most all 3rd switch only whole standard half bridge submodule complete resections on the brachium pontis of place
Guan Bi, after keeping Preset Time, resynchronisation disconnects, and wherein, described Preset Time is not more than 60 ° of electrical angles.
Preferably, described Preset Time is 100-200 microsecond.
The invention provides a kind of modular multilevel half-bridge inverter, each bridge of modular multilevel half-bridge inverter
Arm all includes that N number of standard half bridge submodule, each standard half bridge submodule include the first switch and second switch, in the first switch
The emitter stage of IGBT is connected with the colelctor electrode of IGBT in second switch；In each upper brachium pontis from DC side to exchange side to before
From front N-1 the standard half bridge submodule of AC to DC side direction in N-1 standard half bridge submodule and each lower brachium pontis
Block the most also includes the 3rd switch, and in the 3rd switch, the colelctor electrode of IGBT is with the colelctor electrode of IGBT in the first switch in this module even
Connect, the emitter stage of IGBT and the current collection of IGBT in the first switch in adjacent relatively electronegative potential standard half bridge submodule in the 3rd switch
Pole connects；In upper brachium pontis, in standard half bridge submodule the 3rd switch with in adjacent relatively electronegative potential standard half bridge submodule
First switch complementary switching, in lower brachium pontis, the 3rd switch in standard half bridge submodule is with the first switch in this module mutually
Mend switching.
Modular multilevel half-bridge inverter that is visible, that provide for the present invention, any one brachium pontis always exists at one
Whole standard half bridge submodules therein meeting complete resection in 60 ° of electrical angles, in the process, due to IGBT in the 3rd switch
Guan Bi, the N number of electric capacity of voltage regulation in N number of standard half bridge submodule on this brachium pontis can be distinguished parallel connection, finally make all of standard
Half-bridge submodule all pressed against the long-pending of the capacitance of N number of standard half bridge submodule and its voltage and count divided by capacitance and, then
On the one hand, the present invention, without reducing rated voltage modulation ratio, is greatly improved rated voltage modulation ratio, at identical AC and DC
Under rated voltage, decrease each brachium pontis submodule quantity, greatly reduce cost.On the other hand, switching frequency strictly keeps
In power frequency, switching loss is made to minimize.All press finally, due to inverter submodule achieves nature, simplify modulation algorithm, fall
The low demand of calculating real-time to control system.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to institute in prior art and embodiment
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtains according to these accompanying drawings
Obtain other accompanying drawing.
Fig. 1 is the structural representation of a kind of modular multilevel half-bridge inverter of the prior art；
The structural representation of the standard half bridge submodule in a kind of modular multilevel half-bridge inverter that Fig. 2 provides for Fig. 1
Figure；
The structural representation of a kind of standard half bridge submodule that Fig. 3 provides for the present invention；
A kind of modular multilevel half-bridge that the standard half bridge submodule provided in Fig. 3 is provided that Fig. 4 provides for the present invention
Converter structure schematic diagram.
Detailed description of the invention
The core of the present invention is to provide a kind of modular multilevel half-bridge inverter, it is not necessary to reduce rated voltage modulation ratio,
Rated voltage modulation ratio is greatly improved, under identical AC and DC rated voltage, decreases each brachium pontis submodule quantity,
Greatly reduce cost.On the other hand, switching frequency is strictly maintained at power frequency, makes switching loss minimize.Finally, due to the change of current
Device submodule achieves nature and all presses, and simplifies modulation algorithm, reduces the demand of calculating real-time to control system.
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
Refer to Fig. 3 and Fig. 4, wherein, the structural representation of a kind of standard half bridge submodule that Fig. 3 provides for the present invention,
A kind of modular multilevel half-bridge inverter knot that the standard half bridge submodule provided in Fig. 3 is provided that Fig. 4 provides for the present invention
Structure schematic diagram.
Each brachium pontis of this modular multilevel half-bridge inverter all includes N number of standard half bridge submodule, and N is not less than 2
Integer, each standard half bridge submodule includes the first switch 1 and second switch 2, the emitter stage and the of IGBT in the first switch 1
In two switches 2, the colelctor electrode of IGBT connects；
In each upper brachium pontis from DC side to exchange side to front N-1 standard half bridge submodule and each lower brachium pontis
In from front N-1 the standard half bridge submodule of AC to DC side direction the most also include the 3rd switch 3, the 3rd switch 3 in
The colelctor electrode of IGBT is connected with the colelctor electrode of IGBT in the first switch 1 in this module, in the 3rd switch 3 IGBT emitter stage and
In the first switch 1 in adjacent relatively electronegative potential standard half bridge submodule, the colelctor electrode of IGBT connects；In upper brachium pontis, standard half bridge
The 3rd switch 3 in submodule and the first complementary switching of switch 1 in adjacent relatively electronegative potential standard half bridge submodule, at lower brachium pontis
In, the 3rd switch 3 in standard half bridge submodule and the first complementary switching of switch 1 in this module.
Firstly the need of explanation, the switch mentioned in the application each means and is made up of IGBT and anti-paralleled diode thereof
Switch, the first switch of each submodule and second switch complementation switching, it addition, the first switch 1 Guan Bi and second switch 2 disconnect
Then representing that the standard half bridge submodule at these two switch places is put into, the first switch 1 disconnection and second switch 2 close then table
Show that the standard half bridge submodule at these two switch places is cut；In modulated process, the quantity that each phase puts into submodule is identical
Quantity in excision submodule.
It is understood that control system is when being modulated inverter, any one brachium pontis exists and is not put into
During standard half bridge submodule, owing to the 3rd switch 3 in the standard half bridge submodule that is not put into can close, thus it is not put into
Standard half bridge submodule in electric capacity of voltage regulation can parallel connection, the standard half bridge submodule not the most now being put into can be carried out from all
Pressure, all pressure value by capacitance and its voltage amass and count divided by capacitance and determine.
It addition, for any one brachium pontis, modulation algorithm can ensure that, always exist in 360 ° of electric cycles (0.02s)
One 60 ° electrical angles (0.02s/6=0.0033s=3300us), all standard half bridge submodules excision on this brachium pontis, then should
Electric capacity of voltage regulation in all standard half bridge submodules on brachium pontis is in parallel, in this electrical angle, and all standards on this brachium pontis half
Bridge submodule can carry out from all pressing, in like manner, all pressure value by capacitance and its voltage amass and count divided by capacitance and determine, also
That is:
Wherein, C1、C2…CNIt is respectively all quilts on a brachium pontis
The capacitance of the N number of electric capacity of voltage regulation in N number of standard half bridge submodule of excision, U1、U2…UNIt is respectively above-mentioned N number of electric capacity of voltage regulation two
The magnitude of voltage of end.
In modulated process, each brachium pontis carries out switch on-off in strict accordance with work frequency.
When direct current voltage across poles is equal to 1 with the ratio exchanging voltage between phases maximum, the switching of each brachium pontis submodule is suitable
Sequence all carries out (from top to bottom or from the bottom to top) according to the electrical connection order of submodule.
When direct current voltage across poles is more than 1 with the ratio exchanging voltage between phases maximum, needed for brachium pontis synthesis alternating voltage
Submodule will not cover the several submodules near direct current both positive and negative polarity, and in such situations, brachium pontis puts into submodule by step fortune
Row, to after the submodule of direct current both positive and negative polarity, will carry out a leapfrog and run, and make the submodule of this brachium pontis all put into, and
Making the submodule of up or down brachium pontis corresponding to this brachium pontis all exit, when arbitrary phase carries out leapfrog operation, other is biphase also same
Equidirectional and with step number the leapfrog of Shi Jinhang runs.
The most for concreteness illustrate, it is assumed that on each brachium pontis of this inverter, have 20 standard half bridge submodules,
It is followed successively by No. 1 to No. 20 from AC to DC side direction, because direct current voltage across poles and the ratio exchanging voltage between phases maximum
During more than 1, the submodule needed for brachium pontis synthesis alternating voltage will need not all of submodule and participate in alternating voltage synthesis, because of
This, it is assumed that brachium pontis corresponding for A puts into submodule and runs to after the submodule of direct current both positive and negative polarity by step, namely A is relative
The upper brachium pontis answered 1-18 is put into, and lower brachium pontis 1 and No. 2 are put into, and upper brachium pontis 1 corresponding for B and No. 2 are put into, lower brachium pontis 1
Being put into No. 18, upper brachium pontis corresponding for C 1-10 is put into, and lower brachium pontis 1 to 10 is put into, and the most now carries out leapfrog fortune
OK, other is biphase carries out equidirectional and with step number leapfrog the most simultaneously and runs, also will in upper brachium pontis corresponding for A No. 19 and
Force for No. 20 to put into, force to put into, by No. 11 in upper brachium pontis corresponding for C by No. 3 in upper brachium pontis corresponding for B and No. 4
Forcing to put into No. 12, now the most corresponding for A upper brachium pontis 1-20 is put into, and lower brachium pontis is the most cut, corresponding upper of B
Brachium pontis 1 and No. 4 are put into, and lower brachium pontis 1 and No. 16 are put into, and upper brachium pontis corresponding for C 1-12 is put into, lower brachium pontis 1 to 8
Be put into, then corresponding for A lower brachium pontis is carried out from all pressing.
As preferably, in each brachium pontis, near the capacitance of the electric capacity of voltage regulation in the standard half bridge submodule of AC
More than the capacitance near the electric capacity of voltage regulation in the standard half bridge submodule of DC side, and two standards of arbitrary neighborhood therein half
In bridge submodule, the capacitance of the electric capacity of voltage regulation in the standard half bridge submodule of AC is not less than the standard near DC side
The capacitance of the electric capacity of voltage regulation in half-bridge submodule.
It is understood that the standard half bridge submodule in inverter is carrying out also requiring guarantee institute while all pressures
Some electric capacity of voltage regulation will not overcharge also will not cross and put.In actual application, the electric capacity of voltage regulation near AC is easier to be occurred overcharging
Or crossing and put, the electric capacity of voltage regulation near DC side is then less susceptible to be occurred overcharging or crossing putting, therefore, near AC
Electric capacity of voltage regulation capacitance require higher, near DC side electric capacity of voltage regulation capacitance require relatively low.
In prior art in order to prevent electric capacity of voltage regulation to overcharge or cross and put be to use many group standard half bridge submodules to carry out
Rotation turns on and requires that control system carries out submodule monitoring voltage and rotation with 100 microseconds or shorter cycle.This is just
The operational capability of control system is had higher requirement.Further, since modular multilevel half-bridge of the prior art changes
Stream device can not realize from all pressing, and this just requires that the capacitance of electric capacity of voltage regulation in all standard half bridge submodules is equal, and owing to leaning on
The capacitance of the electric capacity of voltage regulation of nearly DC side actually need not too big, but the capacitance of the electric capacity of voltage regulation of close AC requires very
Greatly, therefore, for unification, only in the capacitance of AC, all of electric capacity of voltage regulation requires that the highest, greatest requirements configures, from
And considerably increase the electric capacity total amount needed for whole brachium pontis.
In the application, the submodule electric capacity of non-equivalent is used to dispose the suppression realizing submodule voltage pulsation, each height
The capacitance of module can carry out the deployment of non-equivalent according to the feature of respective discharge and recharge, makes the capacitance of AC submodule
Capacitance more than DC side submodule.Namely select the electric capacity of voltage regulation that capacitance is bigger to be applied to the standard half bridge near AC
In submodule, and the electric capacity of voltage regulation selecting capacitance less is applied in the standard half bridge submodule of DC side, thus i.e. has
Effect prevents electric capacity of voltage regulation to occur overcharging or crossing the generation of the phenomenon put, and also makes at same nominal electric current and submodule voltage
Under fluctuation, the non-equivalent electric capacity after optimization is disposed to dispose than equivalent capacitance and can be reduced the electric capacity total amount needed for whole brachium pontis.
As preferably, in each brachium pontis, the N number of electric capacity of voltage regulation in N number of standard half bridge submodule is divided into M group, wherein,
M is the integer more than 2 and less than N, is followed successively by first group, second group from AC to DC side direction ... until M group, often group
In the capacitance of electric capacity of voltage regulation equal, wherein, the capacitance of the electric capacity of voltage regulation in capacitance ＞ of electric capacity of voltage regulation second group in first group
>=.... the capacitance of the electric capacity of voltage regulation in the >=the M group.
It should be noted that do not do at this especially for N number of electric capacity of voltage regulation being specifically divided into several class present invention here
Restriction, determine according to practical situation.
As preferably, M takes 4.
As preferably, M takes 5.
Certainly, M here can also take other numerical value, and the present invention is not particularly limited at this, comes according to practical situation
Fixed.
As preferably, each standard half bridge submodule of each brachium pontis also includes:
The voltage regulation resistance in parallel with electric capacity of voltage regulation；
Just synchronize the when of the most all 3rd switch 3 only whole standard half bridge submodule complete resections on the brachium pontis of place
Guan Bi, after keeping Preset Time, resynchronisation disconnects, and wherein, Preset Time is not more than 60 ° of electrical angles.
As preferably, Preset Time is 100-200 microsecond.
It is understood that in practical engineering application, the electric capacity of voltage regulation in each standard half bridge submodule is the most also
Being associated with the equalizing resistance of equivalence, resistance is at tens kilo-ohms.During standard half bridge submodule is all pressed, equalizing resistance can consume
Energy.
Therefore, in order to reduce energy loss and the submodule loss of voltage, all 3rd limited here on single brachium pontis opens
Close 3 should only just synchronizing close all standard half bridge submodules of this brachium pontis all exit when, keep 100-200 microsecond
(depending on the most all pushing back the time number of fields on road, the time is the shortest, and the energy that equalizing resistance consumes is the fewest), then resynchronisation is separately.
Certainly, other times can also be kept here, as long as less than 60 ° of electrical angles.
The invention provides a kind of modular multilevel half-bridge inverter, each bridge of modular multilevel half-bridge inverter
Arm all includes that N number of standard half bridge submodule, each standard half bridge submodule include the first switch and second switch, in the first switch
The emitter stage of IGBT is connected with the colelctor electrode of IGBT in second switch；In each upper brachium pontis from DC side to exchange side to before
From front N-1 the standard half bridge submodule of AC to DC side direction in N-1 standard half bridge submodule and each lower brachium pontis
Block the most also includes the 3rd switch, and in the 3rd switch, the colelctor electrode of IGBT is with the colelctor electrode of IGBT in the first switch in this module even
Connect, the emitter stage of IGBT and the current collection of IGBT in the first switch in adjacent relatively electronegative potential standard half bridge submodule in the 3rd switch
Pole connects；In upper brachium pontis, in standard half bridge submodule the 3rd switch with in adjacent relatively electronegative potential standard half bridge submodule
First switch complementary switching, in lower brachium pontis, the 3rd switch in standard half bridge submodule is with the first switch in this module mutually
Mend switching.
Modular multilevel half-bridge inverter that is visible, that provide for the present invention, any one brachium pontis always exists at one
Whole standard half bridge submodules therein meeting complete resection in 60 ° of electrical angles, in the process, due to IGBT in the 3rd switch
Guan Bi, the N number of electric capacity of voltage regulation in N number of standard half bridge submodule on this brachium pontis can be distinguished parallel connection, finally make all of standard
Half-bridge submodule all pressed against the long-pending of capacitance and its voltage and count divided by capacitance and, then on the one hand, the present invention is without dropping
Low rated voltage modulation ratio, is greatly improved rated voltage modulation ratio, under identical AC and DC rated voltage, decreases every
Individual brachium pontis submodule quantity, greatly reduces cost.On the other hand, switching frequency is strictly maintained at power frequency, makes switching loss
Littleization.All press finally, due to inverter submodule achieves nature, simplify modulation algorithm, reduce control system real-time
The demand calculated.
It should be noted that in this manual, the relational terms of such as first and second or the like is used merely to one
Individual entity or operation separate with another entity or operating space, and not necessarily require or imply these entities or operate it
Between exist any this reality relation or order.And, term " includes ", " comprising " or its any other variant are intended to
Contain comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include those
Key element, but also include other key elements being not expressly set out, or also include for this process, method, article or set
Standby intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that
Other identical element is there is also in including the process of described key element, method, article or equipment.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (7)
1. a modular multilevel half-bridge inverter, it is characterised in that described modular multilevel half-bridge inverter each
Brachium pontis all includes N number of standard half bridge submodule, and N is the integer not less than 2, and each described standard half bridge submodule includes that first opens
Closing and second switch, in described first switch, the emitter stage of IGBT is connected with the colelctor electrode of IGBT in described second switch；
In each upper brachium pontis from DC side to exchange side to front N-1 standard half bridge submodule and each lower brachium pontis from
AC the most also includes the 3rd switch, IGBT in described 3rd switch to front N-1 the standard half bridge submodule in DC side direction
Colelctor electrode is connected with the colelctor electrode of IGBT in the first switch in this module, the described 3rd switch in the emitter stage of IGBT and phase
In the first switch in adjacent relatively electronegative potential standard half bridge submodule, the colelctor electrode of IGBT connects；On described in brachium pontis, described mark
The 3rd switch in quasi-semibridge submodule and the first switch complementary switching in adjacent relatively electronegative potential standard half bridge submodule, in institute
State in lower brachium pontis, the 3rd switch in described standard half bridge submodule and the first switch complementary switching in this module.
2. modular multilevel half-bridge inverter as claimed in claim 1, it is characterised in that in each brachium pontis, near friendship
Steady more than near in the standard half bridge submodule of DC side of the capacitance of the electric capacity of voltage regulation in the standard half bridge submodule of stream side
In the capacitance of voltage capacitance, and two standard half bridge submodules of arbitrary neighborhood therein, near the standard half bridge submodule of AC
In the capacitance of electric capacity of voltage regulation not less than the capacitance of electric capacity of voltage regulation in the standard half bridge submodule of DC side.
3. modular multilevel half-bridge inverter as claimed in claim 2, it is characterised in that in each brachium pontis, N number of standard half
N number of electric capacity of voltage regulation in bridge submodule is divided into M group, and wherein, M is the integer more than 2 and less than N, from AC to DC side
Direction is followed successively by first group, second group ... until M group, often the capacitance of the electric capacity of voltage regulation in group is equal, wherein, steady in first group
The capacitance of the electric capacity of voltage regulation in capacitance ＞ of voltage capacitance second group >=.... the capacitance of the electric capacity of voltage regulation in the >=the M group.
4. modular multilevel half-bridge inverter as claimed in claim 3, it is characterised in that M takes 4.
5. modular multilevel half-bridge inverter as claimed in claim 3, it is characterised in that M takes 5.
6. the modular multilevel half-bridge inverter as described in any one of claim 1-5, it is characterised in that each brachium pontis every
Individual standard half bridge submodule also includes:
The voltage regulation resistance in parallel with described electric capacity of voltage regulation；
Ability synchronizing close when of the most all 3rd switch only whole standard half bridge submodule complete resections on the brachium pontis of place,
After keeping Preset Time, resynchronisation disconnects, and wherein, described Preset Time is not more than 60 ° of electrical angles.
7. modular multilevel half-bridge inverter as claimed in claim 6, it is characterised in that described Preset Time is 100-
200 microseconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888830.1A CN106301043B (en) | 2016-10-12 | 2016-10-12 | A kind of modular multilevel half-bridge transverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888830.1A CN106301043B (en) | 2016-10-12 | 2016-10-12 | A kind of modular multilevel half-bridge transverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106301043A true CN106301043A (en) | 2017-01-04 |
| CN106301043B CN106301043B (en) | 2018-08-07 |
Family
ID=57717298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610888830.1A Active CN106301043B (en) | 2016-10-12 | 2016-10-12 | A kind of modular multilevel half-bridge transverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106301043B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112825451A (en) * | 2019-11-18 | 2021-05-21 | 南京南瑞继保电气有限公司 | Energy balance adjustment converter chain, control method, multi-section converter chain and converter |
| CN112865568A (en) * | 2021-01-28 | 2021-05-28 | 重庆大学 | Voltage-sharing control method for optimizing average switching frequency of MMC (Modular multilevel converter) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009661A (en) * | 2014-04-08 | 2014-08-27 | 华南理工大学 | Method for controlling voltages of direct current capacitors of six-switching-group or nine-switching-group MMC converter |
| CN105375801A (en) * | 2015-10-30 | 2016-03-02 | 南方电网科学研究院有限责任公司 | Modular multilevel converter voltage-sharing control method |
| CN105897019A (en) * | 2016-05-26 | 2016-08-24 | 华北电力大学 | Equality constraint based modular multilevel converter (MMC) automatic voltage sharing topology |
-
2016
- 2016-10-12 CN CN201610888830.1A patent/CN106301043B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009661A (en) * | 2014-04-08 | 2014-08-27 | 华南理工大学 | Method for controlling voltages of direct current capacitors of six-switching-group or nine-switching-group MMC converter |
| CN105375801A (en) * | 2015-10-30 | 2016-03-02 | 南方电网科学研究院有限责任公司 | Modular multilevel converter voltage-sharing control method |
| CN105897019A (en) * | 2016-05-26 | 2016-08-24 | 华北电力大学 | Equality constraint based modular multilevel converter (MMC) automatic voltage sharing topology |
Non-Patent Citations (2)
| Title |
|---|
| CONGZHE GAO ET AL.,: "A DC-Link Voltage Self-Balance Method for a Diode-Clamped Modular Multilevel Converter With Minimum Number of Voltage Sensors", 《IEEE TRANSACTIONS ON POWER ELECTRONICS》 * |
| 郭高朋 等，: "模块化多电平变流器的子模块分组调制及均压控制", 《中国电机工程学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112825451A (en) * | 2019-11-18 | 2021-05-21 | 南京南瑞继保电气有限公司 | Energy balance adjustment converter chain, control method, multi-section converter chain and converter |
| CN112825451B (en) * | 2019-11-18 | 2022-04-19 | 南京南瑞继保电气有限公司 | Energy balance adjustment converter chain, control method, multi-section converter chain and converter |
| CN112865568A (en) * | 2021-01-28 | 2021-05-28 | 重庆大学 | Voltage-sharing control method for optimizing average switching frequency of MMC (Modular multilevel converter) |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106301043B (en) | 2018-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104967141B (en) | A kind of Hybrid HVDC system | |
| CN103280763B (en) | A kind of dc circuit breaker and its implementation | |
| CN101657946B (en) | 3-phase high power ups | |
| CN102427304B (en) | Single-phase half-bridge five-level inverter and application circuit thereof | |
| CN109391166A (en) | A kind of translation circuit, control method and power supply unit | |
| CN104067503A (en) | Power converter | |
| CN103078522B (en) | A kind of control method of capacitor charging AC-DC series resonance matrix converter control device | |
| CN102577068A (en) | 3-phase high power UPS | |
| CN110995030A (en) | Solid-state transformer with medium-voltage direct current and true-dual ultra-low-voltage direct current ports | |
| CN107112923A (en) | Modular multilevel converter with thyristor valve | |
| Barakati et al. | Voltage sag and swell compensation with DVR based on asymmetrical cascade multicell converter | |
| US20140347898A1 (en) | Modular multi-level power conversion system with dc fault current limiting capability | |
| CN102594182A (en) | Multilevel inversion topological unit and multilevel inverter | |
| CN209217739U (en) | A kind of active equalization of battery device containing AC module | |
| Schön et al. | Modulation and losses of modular multilevel converters for HVDC applications | |
| CN105141153A (en) | Three-phase rectifier and booster circuit and control method thereof and uninterruptible power supply | |
| CN109742961A (en) | A kind of heat balance control method of modularization multi-level converter | |
| CN204517648U (en) | A kind of discharge circuit, charge-discharge circuit and inverter | |
| CN101699699A (en) | Uninterruptible power supply | |
| CN106301043A (en) | A kind of modular multilevel half-bridge inverter | |
| CN102427352A (en) | High-voltage power electronic combined switch | |
| CN103178736B (en) | A kind of five-electrical level inverter | |
| CN102427305B (en) | Single-phase half-bridge five-level inverter and application circuit thereof | |
| CN102437769B (en) | Single-phase semi-bridge five-electrical level inverter and its application circuit | |
| CA2898934A1 (en) | Modular multi-level power conversion system with dc fault current limiting capability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |