CN108512445A - A kind of Modular multilevel converter based on switching capacity - Google Patents
A kind of Modular multilevel converter based on switching capacity Download PDFInfo
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- CN108512445A CN108512445A CN201810385336.2A CN201810385336A CN108512445A CN 108512445 A CN108512445 A CN 108512445A CN 201810385336 A CN201810385336 A CN 201810385336A CN 108512445 A CN108512445 A CN 108512445A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—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
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
-
- 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
- H02M7/53871—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 with automatic control of output voltage or current
Abstract
The invention discloses a kind of Modular multilevel converters based on switching capacity.The multi-level converter includes three more level bridge arms being connected in parallel between DC bus, and each more level bridge arms include the first, second basic unit and temporary location, and there are three types of different forms for temporary location；For exporting n+1 level, more level bridge arms are followed in series to form by 1 submodule of 2n；It is the first basic unit to have 1 submodule of n in 1 submodule of the 2n, and it is temporary location to have 1 submodule, and it is the second basic unit to have 1 submodule of n；1 the first basic unit of n in more level bridge arms is sequentially connected in series between temporary location and DC bus anode, 1 the second basic unit of n is sequentially connected in series between temporary location and DC bus cathode, and the ac output end of more level bridge arms is drawn by temporary location.The present invention can realize capacitance voltage self-balancing, not need complicated precharging procedure, be suitable for the use occasion of Modular multilevel converter.
Description
Technical field
The present invention relates to power electronics multilevel technical field, especially a kind of modularization based on switching capacity is more
Level converter.
Background technology
In high-power field, due to the pressure-resistant problem of power device, traditional two level voltage source code converters without
Method is applicable in.In recent years, multi-level converter is had received widespread attention with its unique structural advantages in high-voltage large-capacity occasion.
Most common more level topologys can be divided into the more level topologys of diode-clamped, the more level topologys of capacitor-clamped type and cascade
The more level topologys of H bridges.The more level topologys of diode-clamped required clamp diode when level number is more than or equal to 5
It is sharply increased with the quantity of power switch tube, and capacitive balance problem is not easy to solve.Capacitor-clamped type multi-level converter is opened up
It flutters needed for the increase with level number capacitance quantity to increase, and clamping capacitance both end voltage relatively has much difficulty in healing weighing apparatus.The more level of cascaded H-bridges
Converter uses modularized design, is conducive to safeguard and control, however the independent direct current sourc that the topology needs is more, realizes more multiple
It is miscellaneous.
In order to make up existing more level topologys in the defect of high-power applications, German scholar Marquardt R.
And its partner proposes the block combiner multi-level converter based on cascade structure.It is how electric that this kind of converter remains H bridge type
The advantages of high modularization of flat converter, while there is common DC bus, it is convenient for Project Realization, is used directly for high pressure
Powerful occasion.Block combiner multi-level converter is widely used in D.C. high voltage transmission, mesohigh Electric Drive, electric energy
The fields such as quality controlling and high voltage direct current power conversion.However its DC capacitor voltage needs complicated precharge, initialization
It is relatively difficult, and DC capacitor voltage is easy imbalance in modulated process, and control DC capacitor Balancing relization is complicated, limits
Block combiner multi-level converter is further applied.
Switching capacity multi-electrical level inverter is at home and abroad got the attention in recent years, can use less device
It obtains at double in the level of input voltage, and without capacitance voltage imbalance problem, but in low frequency high current occasion capacitance voltage
Ripple is larger, is relatively specific for high frequency output occasion, and limited in power frequency heavy-current output occasion.
Invention content
It is an object of the invention to propose a kind of Modular multilevel converter based on switching capacity, capacitance electricity can be realized
Self-balancing is pressed, and does not need complicated precharging procedure.
Realize that the technical solution of the object of the invention is：A kind of Modular multilevel converter based on switching capacity,
The more level bridge arms being connected in parallel between DC bus including three.For exporting the module based on switching capacity of n+1 level
Change multi-level converter, more level bridge arms are followed in series to form by 2n-1 submodule, and wherein n is the even number more than or equal to 2.
It is the first basic unit SMA to have n-1 submodule in the 2n-1 submodule, and it is temporary location SMC to have 1 submodule, is had
N-1 submodule is the second basic unit SMB.
Further, the n-1 in more level bridge arms the first basic unit SMA are sequentially connected in series in temporary location SMC
Between DC bus anode, n-1 the second basic unit SMB be sequentially connected in series temporary location SMC and DC bus cathode it
Between, the ac output end of more level bridge arms is drawn by temporary location SMC.
Further, the first basic unit SMA includes the first capacitance Ca, the first power switch tube S a, the second power
Switching tube Sb, third power switch tube S c；Wherein each power switch tube is the active switch pipe with anti-paralleled diode；The
The anode of one capacitance Ca is connect with the collector of the first power switch tube S a, and tie point is denoted as terminal Xa；First capacitance Ca's is negative
Pole is connect with the emitter of the second power switch tube S b, and tie point is denoted as terminal Xb；The emitter of first power switch tube S a with
The collector of second power switch tube S b connects, and tie point is denoted as terminal Ya；The collector and terminal of third power switch tube S c
The emitter of Xb connections, third power switch tube S c is denoted as terminal Yb.
The second basic unit SMB include the second capacitance Cb, the 4th power switch tube S d, the 5th power switch tube S e,
6th power switch tube S f；Wherein each power switch tube is the active switch pipe with anti-paralleled diode；Second capacitance Cb
Anode connect with the emitter of the 4th power switch tube S d, tie point is denoted as terminal Ye；The cathode and the 6th of second capacitance Cb
The emitter of power switch tube S f connects, and tie point is denoted as terminal Yf；The collector of 4th power switch tube S d is denoted as terminal Xe；
The collector of 5th power switch tube S e is connect with terminal Ye, the emitter and the 6th power switch tube of the 5th power switch tube S c
The collector of Sf connects, and tie point is calculated as terminal Xf.
Further, the temporary location SMC has the first temporary location SMC1, the second temporary location SMC2, among third
Tri- kinds of different forms of cell S MC3：
First temporary location SMC1 includes：Third capacitance Cc1, the 4th capacitance Cc2, the 5th capacitance Cc3, the 6th capacitance Cc4,
7th power switch tube S g1, the 8th power switch tube S g2, the 9th power switch tube S g3, the tenth power switch tube S g4, the tenth
One power switch tube S g5, the 12nd power switch tube S g6, the 13rd power switch tube S g7, the 14th power switch tube S g8,
15th power switch tube S g9, the 16th power switch tube S g10；Wherein each power switch tube is band anti-paralleled diode
Active switch pipe；The anode of the third capacitance Cc1 is connect with the collector of the 7th power switch tube S g1, and tie point is denoted as
Terminal Xc；The cathode of third capacitance Cc1 is connect with the emitter of the 8th power switch tube S g2, and tie point is denoted as terminal Xd；7th
The emitter of power switch tube S g1 is connect with the collector of the 8th power switch tube S g2；The current collection of 9th power switch tube S g3
Pole is connect with terminal Xd；The emitter of 9th power switch tube S g3 is connect with the cathode of the 4th capacitance Cc2；4th capacitance Cc2's
Anode is connect with the collector of the 8th power switch tube S g2；The collector of tenth power switch tube S g4 and the 4th capacitance Cc2's
Anode connection, the emitter of the tenth power switch tube S g4 are connect with the collector of the 11st power switch tube S g5, tie point note
For terminal Z；The emitter of 11st power switch tube S g5 is connect with the cathode of the 4th capacitance Cc2；12nd power switch tube
The collector of Sg6 is connect with terminal Z；The emitter of 12nd power switch tube S g6 is connect with the cathode of the 5th capacitance Cc3；The
The emitter of 13 power switch tube S g7 is connect with terminal Z；The collector and the 5th capacitance Cc3 of 13rd power switch tube S g7
Anode be connected；The collector of 14th power switch tube S g8 is connect with the anode of the 5th capacitance Cc3；14th power switch
The emitter of pipe Sg8 is connect with the collector of the 15th power switch tube S g9, and tie point is denoted as terminal Yc；15th power is opened
The emitter for closing pipe Sg9 connects the cathode of the 5th capacitance Cc3；The collector and the 15th power of 16th power switch tube S g10
The emitter of switching tube Sg9 connects；The emitter of 16th power switch tube S g10 is connect with the cathode of the 6th capacitance Cc4, even
Contact is denoted as terminal Yd；The anode of 6th capacitance Cc4 is connected to terminal Yc.
Second temporary location SMC2 includes：7th capacitance Cd1, the 8th capacitance Cd2, the 9th capacitance Cd3, the 17th power are opened
Close pipe Sh1, the 18th power switch tube S h2, the 19th power switch tube S h3, the 20th power switch tube S h4, the 21st
Power switch tube S h5, the 22nd power switch tube S h6, the 23rd power switch tube S h7, the 24th power switch tube
Sh8；Wherein each power switch tube is the active switch pipe with anti-paralleled diode；The anode and the tenth of 7th capacitance Cd1
The collector of seven power switch tube S h1 connects, and tie point is denoted as terminal Xc；The cathode of 7th capacitance Cd1 is opened with the 18th power
The emitter connection of pipe Sh2 is closed, tie point is denoted as terminal Xd；The emitter and the 18th power of 17th power switch tube S h1
The collector of switching tube Sh2 connects；The collector of 19th power switch tube S h3 is connect with terminal Xd；19th power switch
The emitter of pipe Sh3 is connect with the cathode of the 8th capacitance Cd2；The anode of 8th capacitance Cd2 is with the 18th power switch tube S h2's
Collector connects；The collector of 20th power switch tube S h4 is connect with the anode of the 8th capacitance Cd2, the 20th power switch
The emitter of pipe Sh4 is connect with the collector of the 21st power switch tube S h5, and tie point is denoted as terminal Z；21st power
The emitter of switching tube Sh5 is connect with the cathode of the 8th capacitance Cd2；The collector and the 8th of 22nd power switch tube S h6
The anode connection of capacitance Cd2；The emitter of 22nd power switch tube S h6 is connect with the anode of the 9th capacitance Cd3, tie point
It is denoted as terminal Yc；The emitter of 23rd power switch tube S h7 is connect with the emitter of the 21st power switch tube S h5；
The collector of 23rd power switch tube S h7 is connected with terminal Yc；The collector and second of 24th power switch tube S h8
The emitter of 13 power switch tube S h7 connects；The emitter of 24th power switch tube S g8 and bearing for the 9th capacitance Cd3
Pole connects, and tie point is denoted as terminal Yd.
Third temporary location SMC3 includes：Tenth capacitance Ce1, the 11st capacitance Ce2, the 12nd capacitance Ce3, the 25th
Power switch tube S i1, the 26th power switch tube S i2, the 27th power switch tube S i3, the 28th power switch tube
Si4, the 29th power switch tube S i5, the 30th power switch tube S i6；Wherein each power switch tube is band inverse parallel
The active switch pipe of diode；The anode of the tenth capacitance Ce1 is connect with the collector of the 25th power switch tube S i1,
Tie point is denoted as terminal Xc；The cathode of tenth capacitance Ce1 is connect with the emitter of the 26th power switch tube S i2, tie point
It is denoted as terminal Xd；25th power switch tube S i1 emitters are connect with the collector of the 26th power switch tube S i2；The
The collector of 27 power switch tube S i3 is connect with the collector of the 26th power switch tube S i2；27th power is opened
The emitter for closing pipe Si3 is connect with the collector of the 28th power switch tube S i4, and tie point is denoted as terminal Z；11st capacitance
The anode of Ce2 is connect with the collector of the 27th power switch tube S i3；The emitter of 28th power switch tube S i4 with
The cathode of 11st capacitance Ce2 connects；The emitter and the 28th power switch tube S i4 of 29th power switch tube S i5
Emitter connection, the collector of the 29th power switch tube S i5 connect with the anode of the 12nd capacitance Ce3, and tie point is remembered
For terminal Yc；Terminal Yc is connect with terminal Xd with conducting wire, is equipotential terminal；The collector of 30th power switch tube S i6 with
The emitter of 29th power switch tube S i5 connects；The emitter and the 12nd capacitance Ce3 of 30th power switch tube S i6
Cathode connection, tie point is denoted as terminal Yd.
Further, more level bridge arms include the first basic unit SMA1 ... SMAn- from 1 to n-1 number consecutivelies
1, temporary location SMC, from 1 to n-1 number consecutivelies the second basic unit SMB1 ... SMBn-1, number be 1 it is first substantially single
The Xa terminals of first SMA1 are connected to the poles DC bus P, and the Xb terminals of SMA1 are not connected to any terminal；The Ya terminals of SMA1 and number
For the Xa terminals connection of 2 the first basic unit SMA2, the Yb terminals of SMA1 and the Xb terminals of SMA2 connect, the Ya terminals of SMA2
It is connect with the Xa terminals for numbering the first basic unit SMA3 for being 3, the Yb terminals of SMA2 and the Xb terminals of SMA3 connect；Class successively
It is pushed into the first basic unit SMA n-2 that number is n-2；The Ya terminals for the first basic unit SMA n-1 that number is n-1 are in
Between cell S MC the connection of Xc terminals, the Yb terminals of SMA n-1 connect with the Xd terminals of temporary location SMC；Temporary location SMC's
Yc terminals are connect with the Xe terminals for the second basic unit SMB1 that number is 1, the Yd terminals of temporary location SMC and the ends Xf of SMB1
Son connection, the Ye terminals of SMB1 and the Xe terminals for numbering the second basic unit SMB2 for being 2 are connect, the Yf terminals and SMB2 of SMB1
Xf terminals connection；The Ye terminals of SMB2 are connect with the Xe terminals for the second basic unit SMB3 that number is 3, the Yf terminals of SMB2
It is connect with the Xf terminals of SMB3；And so on to number be n-2 the second basic unit SMB n-2；The second base that number is n-1
The Ye terminals of this cell S MB n-1 are not connected to any terminal, and the Yf terminals of SMB n-1 are connect with the poles DC bus N.
Further, the structure of the temporary location SMC of more level bridge arms can be the first temporary location SMC1, second
Any one in temporary location SMC2, third temporary location SMC3 tri-.
The structure of described three more level bridge arms in parallel is identical, the Z terminals of the temporary location SMC of level bridge arm more than three
Respectively as a phases ac output end, b phases ac output end, c phase ac output ends.
Compared with prior art, the present invention its remarkable advantage is：(1) capacitance voltage can be with self-balancing, to save
Additional hardware circuit and control system, avoid the occupancy calculation resources of Equilibrium control algolithm mostly with delay is big lacks
It falls into；(2) it is not necessarily to complicated precharging procedure, start-up course is simple, without charging one by one to each DC capacitor, simplifies startup
Process.
Description of the drawings
Fig. 1 is the system construction drawing of the Modular multilevel converter the present invention is based on switching capacity.
Fig. 2 is the structure chart of the first basic unit (SMA) in the present invention.
Fig. 3 is the structure chart of the second basic unit (SMB) in the present invention.
Fig. 4 is the structure chart of the first temporary location (SMC1) in the present invention.
Fig. 5 is the structure chart of the second temporary location (SMC2) in the present invention.
Fig. 6 is the structure chart of the third temporary location (SMC3) in the present invention.
Specific implementation mode
The present invention is made a concrete analysis of below according to drawings and examples.
As shown in Figure 1, the present invention is based on the Modular multilevel converter of switching capacity, including three are connected in parallel on direct current mother
The ac output end of more level bridge arms between line, more level bridge arms can be connected by inductance with power grid, or directly to
Alternating current generator is powered.
For exporting the Modular multilevel converter based on switching capacity of n+1 level, more level bridge arms are by 2n-
1 submodule is followed in series to form, and wherein n is the even number more than or equal to 2；There is n-1 submodule in the 2n-1 submodule
For the first basic unit SMA, it is temporary location SMC to have 1 submodule, and it is the second basic unit SMB to have n-1 submodule.
N-1 the first basic unit SMA in more level bridge arms are sequentially connected in series in temporary location SMC and DC bus
Between anode, n-1 the second basic unit SMB are sequentially connected in series between temporary location SMC and DC bus cathode, more level bridges
The ac output end of arm is drawn by temporary location SMC.
As shown in Fig. 2, the first basic unit SMA includes the first capacitance Ca, the first power switch tube S a, the second power switch
Pipe Sb, third power switch tube S c；Wherein each power switch tube is the active switch pipe with anti-paralleled diode；First electricity
The anode for holding Ca is connect with the collector of the first power switch tube S a, and tie point is denoted as terminal Xa；The cathode of first capacitance Ca with
The emitter of second power switch tube S b connects, and tie point is denoted as terminal Xb；The emitter and second of first power switch tube S a
The collector of power switch tube S b connects, and tie point is denoted as terminal Ya；The collector of third power switch tube S c connects with terminal Xb
It connects, the emitter of third power switch tube S c is denoted as terminal Yb.
As shown in figure 3, the second basic unit SMB includes the second capacitance Cb, the 4th power switch tube S d, the 5th power switch
Pipe Se, the 6th power switch tube S f；Wherein each power switch tube is the active switch pipe with anti-paralleled diode；Second electricity
The anode for holding Cb is connect with the emitter of the 4th power switch tube S d, and tie point is denoted as terminal Ye；The cathode of second capacitance Cb with
The emitter of 6th power switch tube S f connects, and tie point is denoted as terminal Yf；The collector of 4th power switch tube S d is denoted as end
Sub- Xe；The collector of 5th power switch tube S e is connect with terminal Ye, the emitter and the 6th power of the 5th power switch tube S c
The collector of switching tube Sf connects, and tie point is denoted as terminal Xf.
As shown in Figure 4,5, 6, temporary location SMC has the first temporary location SMC1, the second temporary location SMC2, among third
Tri- kinds of different forms of cell S MC3：
As shown in figure 4, the first temporary location SMC1 includes：Third capacitance Cc1, the 4th capacitance Cc2, the 5th capacitance Cc3,
Six capacitance Cc4, the 7th power switch tube S g1, the 8th power switch tube S g2, the 9th power switch tube S g3, the tenth power switch
Pipe Sg4, the 11st power switch tube S g5, the 12nd power switch tube S g6, the 13rd power switch tube S g7, the 14th power
Switching tube Sg8, the 15th power switch tube S g9, the 16th power switch tube S g10；Wherein each power switch tube is that band is anti-
The active switch pipe of parallel diode；The anode of the third capacitance Cc1 is connect with the collector of the 7th power switch tube S g1,
Tie point is denoted as terminal Xc；The cathode of third capacitance Cc1 is connect with the emitter of the 8th power switch tube S g2, and tie point is denoted as
Terminal Xd；The emitter of 7th power switch tube S g1 is connect with the collector of the 8th power switch tube S g2；9th power switch
The collector of pipe Sg3 is connect with terminal Xd；The emitter of 9th power switch tube S g3 is connect with the cathode of the 4th capacitance Cc2；The
The anode of four capacitance Cc2 is connect with the collector of the 8th power switch tube S g2；The collector of tenth power switch tube S g4 and
The anode connection of four capacitance Cc2, the emitter of the tenth power switch tube S g4 and the collector of the 11st power switch tube S g5 connect
It connects, tie point is denoted as terminal Z；The emitter of 11st power switch tube S g5 is connect with the cathode of the 4th capacitance Cc2；12nd
The collector of power switch tube S g6 is connect with terminal Z；The emitter of 12nd power switch tube S g6 and bearing for the 5th capacitance Cc3
Pole connects；The emitter of 13rd power switch tube S g7 is connect with terminal Z；The collector of 13rd power switch tube S g7 and
The anode of five capacitance Cc3 is connected；The collector of 14th power switch tube S g8 is connect with the anode of the 5th capacitance Cc3；14th
The emitter of power switch tube S g8 is connect with the collector of the 15th power switch tube S g9, and connecting pin is denoted as Yc；15th work(
The emitter of rate switching tube Sg9 connects the cathode of the 5th capacitance Cc3；The collector and the 15th of 16th power switch tube S g10
The emitter of power switch tube S g9 connects；The emitter of 16th power switch tube S g10 and the cathode of the 6th capacitance Cc4 connect
It connects, tie point is denoted as terminal Yd；The anode of 6th capacitance Cc4 is connected to terminal Yc；
As shown in figure 5, the second temporary location SMC2 includes：7th capacitance Cd1, the 8th capacitance Cd2, the 9th capacitance Cd3,
17 power switch tube S h1, the 18th power switch tube S h2, the 19th power switch tube S h3, the 20th power switch tube
Sh4, the 21st power switch tube S h5, the 22nd power switch tube S h6, the 23rd power switch tube S h7, the 20th
Four power switch tube S h8；Wherein each power switch tube is the active switch pipe with anti-paralleled diode；7th capacitance
The anode of Cd1 is connect with the collector of the 17th power switch tube S h1, and tie point is denoted as terminal Xc；The cathode of 7th capacitance Cd1
It is connect with the emitter of the 18th power switch tube S h2, tie point is denoted as terminal Xd；The transmitting of 17th power switch tube S h1
Pole is connect with the collector of the 18th power switch tube S h2；The collector of 19th power switch tube S h3 is connect with terminal Xd；
The emitter of 19th power switch tube S h3 is connect with the cathode of the 8th capacitance Cd2；The anode and the 18th of 8th capacitance Cd2
The collector of power switch tube S h2 connects；The collector of 20th power switch tube S h4 is connect with the anode of the 8th capacitance Cd2,
The emitter of 20th power switch tube S h4 is connect with the collector of the 21st power switch tube S h5, and tie point is denoted as terminal
Z；The emitter of 21st power switch tube S h5 is connect with the cathode of the 8th capacitance Cd2；22nd power switch tube S h6
The anode of collector and the 8th capacitance Cd2 connect；The emitter of 22nd power switch tube S h6 and the 9th capacitance Cd3's
Anode connection, tie point are denoted as terminal Yc；The emitter and the 21st power switch tube of 23rd power switch tube S h7
The emitter of Sh5 connects；The collector of 23rd power switch tube S h7 is connected with terminal Yc；24th power switch tube
The collector of Sh8 is connect with the emitter of the 23rd power switch tube S h7；The emitter of 24th power switch tube S g8
It is connect with the cathode of the 9th capacitance Cd3, tie point is denoted as terminal Yd；
As shown in fig. 6, third temporary location SMC3 includes：Tenth capacitance Ce1, the 11st capacitance Ce2, the 12nd capacitance
Ce3, the 25th power switch tube S i1, the 26th power switch tube S i2, the 27th power switch tube S i3, the 20th
Eight power switch tube S i4, the 29th power switch tube S i5, the 30th power switch tube S i6；Wherein each power switch tube
It is the active switch pipe with anti-paralleled diode；The anode of the tenth capacitance Ce1 is with the 25th power switch tube S i1's
Collector connects, and tie point is denoted as terminal Xc；The emitter of the cathode and the 26th power switch tube S i2 of tenth capacitance Ce1
Connection, tie point are denoted as terminal Xd；The collection of 25th power switch tube S i1 emitters and the 26th power switch tube S i2
Electrode connects；The collector of 27th power switch tube S i3 is connect with the collector of the 26th power switch tube S i2；The
The emitter of 27 power switch tube S i3 is connect with the collector of the 28th power switch tube S i4, and tie point is denoted as terminal
Z；The anode of 11st capacitance Ce2 is connect with the collector of the 27th power switch tube S i3；28th power switch tube
The emitter of Si4 is connect with the cathode of the 11st capacitance Ce2；The emitter and the 28th of 29th power switch tube S i5
The emitter of power switch tube S i4 connects, the anode of the collector and the 12nd capacitance Ce3 of the 29th power switch tube S i5
Connection, tie point are denoted as terminal Yc；Terminal Yc is connect with terminal Xd with conducting wire, is equipotential terminal；30th power switch tube
The collector of Si6 is connect with the emitter of the 29th power switch tube S i5；The emitter of 30th power switch tube S i6 with
The cathode of 12nd capacitance Ce3 connects, and tie point is denoted as terminal Yd.
As shown in Fig. 2, more level bridge arms include the first basic unit SMA1 ... SMAn-1 from 1 to n-1 number consecutivelies, in
Between cell S MC, from 1 to n-1 number consecutivelies the second basic unit SMB1 ... SMBn-1；The number be 1 it is first substantially single
The Xa terminals of first SMA1 are connected to the poles DC bus P, and the Xb terminals of SMA1 are not connected to any terminal；The Ya terminals of SMA1 and number
For the Xa terminals connection of 2 the first basic unit SMA2, the Yb terminals of SMA1 and the Xb terminals of SMA2 connect；The Ya terminals of SMA2
It is connect with the Xa terminals for numbering the first basic unit SMA3 for being 3, the Yb terminals of SMA2 and the Xb terminals of SMA3 connect；Class successively
It is pushed into the first basic unit SMA n-2 that number is n-2；The Ya terminals for the first basic unit SMA n-1 that number is n-1 are in
Between cell S MC Xc terminals connection；The Yb terminals of SMA n-1 are connect with the Xd terminals of temporary location SMC；Temporary location SMC's
Yc terminals are connect with the Xe terminals for the second basic unit SMB1 that number is 1, the Yd terminals of temporary location SMC and the ends Xf of SMB1
Son connection；The Ye terminals of SMB1 are connect with the Xe terminals for the second basic unit SMB2 that number is 2, the Yf terminals and SMB2 of SMB1
Xf terminals connection；The Ye terminals of SMB2 are connect with the Xe terminals for the second basic unit SMB3 that number is 3, the Yf terminals of SMB2
It is connect with the Xf terminals of SMB3；And so on to number be n-2 the second basic unit SMB n-2；The second base that number is n-1
The Ye terminals of this cell S MB n-1 are not connected to any terminal；The Yf terminals of SMB n-1 are connect with the poles DC bus N.
The structure of the temporary location SMC of more level bridge arms can be the first temporary location SMC1, the second temporary location SMC2,
Any one in third temporary location SMC3 tri-.
As shown in Fig. 2, the structure of three more level bridge arms in parallel is identical, the temporary location SMC of level bridge arm more than three
Z terminals respectively as a phases ac output end, b phases ac output end, c phase ac output ends.
Claims (7)
1. a kind of Modular multilevel converter based on switching capacity, which is characterized in that be connected in parallel on DC bus including three
Between more level bridge arms.
For exporting the Modular multilevel converter based on switching capacity of n+1 level, more level bridge arms are by 2n-1
Submodule is followed in series to form, and wherein n is the even number more than or equal to 2；It is the to have n-1 submodule in the 2n-1 submodule
One basic unit (SMA), it is temporary location (SMC) to have 1 submodule, and it is the second basic unit (SMB) to have n-1 submodule.
N-1 the first basic units (SMA) in more level bridge arms are sequentially connected in series in temporary location (SMC) and DC bus
Between anode, n-1 the second basic units (SMB) are sequentially connected in series between temporary location (SMC) and DC bus cathode, mostly electric
The ac output end of level bridge arm is drawn by temporary location (SMC).
2. the Modular multilevel converter according to claim 1 based on switching capacity, which is characterized in that described first
Basic unit (SMA) includes the first capacitance (Ca), the first power switch tube (Sa), the second power switch tube (Sb), third power
Switching tube (Sc)；Wherein each power switch tube is the active switch pipe with anti-paralleled diode；First capacitance (Ca) is just
Pole is connect with the collector of the first power switch tube (Sa), and tie point is denoted as terminal Xa；The cathode and second of first capacitance (Ca)
The emitter of power switch tube (Sb) connects, and tie point is denoted as terminal Xb；The emitter and second of first power switch tube (Sa)
The collector of power switch tube (Sb) connects, and tie point is denoted as terminal (Ya)；The collector of third power switch tube (Sc) and end
Sub- Xb connections, the emitter of third power switch tube (Sc) are denoted as terminal Yb.
3. the Modular multilevel converter according to claim 1 based on switching capacity, which is characterized in that described second
Basic unit (SMB) includes the second capacitance (Cb), the 4th power switch tube (Sd), the 5th power switch tube (Se), the 6th power
Switching tube (Sf)；Wherein each power switch tube is the active switch pipe with anti-paralleled diode；Second capacitance (Cb) is just
Pole is connect with the emitter of the 4th power switch tube (Sd), and tie point is denoted as terminal Ye；The cathode and the 6th of second capacitance (Cb)
The emitter of power switch tube (Sf) connects, and tie point is denoted as terminal (Yf)；The collector of 4th power switch tube (Sd) is denoted as
Terminal Xe；The collector of 5th power switch tube (Se) is connect with terminal Ye, the emitter of the 5th power switch tube (Sc) and
The collector of six power switch tubes (Sf) connects, and tie point is denoted as terminal Xf.
4. the Modular multilevel converter according to claim 1 based on switching capacity, which is characterized in that the centre
Unit (SMC) has the first temporary location (SMC1), the second temporary location (SMC2), and three kinds of third temporary location (SMC3) is different
Form：
First temporary location (SMC1) includes：Third capacitance (Cc1), the 4th capacitance (Cc2), the 5th capacitance (Cc3), the 6th capacitance
(Cc4), the 7th power switch tube (Sg1), the 8th power switch tube (Sg2), the 9th power switch tube (Sg3), the tenth power are opened
Close pipe (Sg4), the 11st power switch tube (Sg5), the 12nd power switch tube (Sg6), the 13rd power switch tube (Sg7),
14th power switch tube (Sg8), the 15th power switch tube (Sg9), the 16th power switch tube (Sg10)；Wherein each work(
Rate switching tube is the active switch pipe with anti-paralleled diode；Anode and the 7th power switch of the third capacitance (Cc1)
The collector connection of (Sg1) is managed, tie point is denoted as terminal Xc；The cathode of third capacitance (Cc1) and the 8th power switch tube (Sg2)
Emitter connection, tie point is denoted as terminal Xd；The emitter and the 8th power switch tube of 7th power switch tube (Sg1)
(Sg2) collector connection；The collector of 9th power switch tube (Sg3) is connect with terminal Xd；9th power switch tube (Sg3)
Emitter connect with the cathode of the 4th capacitance (Cc2)；The anode of 4th capacitance (Cc2) and the 8th power switch tube (Sg2)
Collector connects；The collector of tenth power switch tube (Sg4) is connect with the anode of the 4th capacitance (Cc2), the tenth power switch
The emitter of pipe (Sg4) is connect with the collector of the 11st power switch tube (Sg5), and tie point is denoted as terminal Z；11st power
The emitter of switching tube (Sg5) is connect with the cathode of the 4th capacitance (Cc2)；The collector of 12nd power switch tube (Sg6) with
Terminal Z connections；The emitter of 12nd power switch tube (Sg6) is connect with the cathode of the 5th capacitance (Cc3)；13rd power is opened
The emitter for closing pipe (Sg7) is connect with terminal Z；The collector and the 5th capacitance (Cc3) of 13rd power switch tube (Sg7) are just
Extremely it is connected；The collector of 14th power switch tube (Sg8) is connect with the anode of the 5th capacitance (Cc3)；14th power switch
The emitter of pipe (Sg8) is connect with the collector of the 15th power switch tube (Sg9), and connecting pin is denoted as Yc；15th power is opened
The emitter for closing pipe (Sg9) connects the cathode of the 5th capacitance (Cc3)；The collector and the tenth of 16th power switch tube (Sg1) 0
The emitter of five power switch tubes (Sg9) connects；The emitter of 16th power switch tube (Sg10) and the 6th capacitance (Cc4)
Cathode connects, and tie point is denoted as terminal Yd；The anode of 6th capacitance (Cc4) is connected to terminal Yc；
Second temporary location (SMC2) includes：7th capacitance (Cd1), the 8th capacitance (Cd2), the 9th capacitance (Cd3), the 17th work(
Rate switching tube (Sh1), the 18th power switch tube (Sh2), the 19th power switch tube (Sh3), the 20th power switch tube
(Sh4), the 21st power switch tube (Sh5), the 22nd power switch tube (Sh6), the 23rd power switch tube
(Sh7), the 24th power switch tube (Sh8)；Wherein each power switch tube is the active switch with anti-paralleled diode
Pipe；The anode of 7th capacitance (Cd1) is connect with the collector of the 17th power switch tube (Sh1), and tie point is denoted as terminal
Xc；The cathode of 7th capacitance (Cd1) is connect with the emitter of the 18th power switch tube (Sh2), and tie point is denoted as terminal Xd；The
The emitter of 17 power switch tubes (Sh1) is connect with the collector of the 18th power switch tube (Sh2)；19th power switch
The collector of pipe (Sh3) is connect with terminal Xd；The emitter of 19th power switch tube (Sh3) and bearing for the 8th capacitance (Cd2)
Pole connects；The anode of 8th capacitance (Cd2) is connect with the collector of the 18th power switch tube (Sh2)；20th power switch
The collector for managing (Sh4) is connect with the anode of the 8th capacitance (Cd2), the emitter and second of the 20th power switch tube (Sh4)
The collector of 11 power switch tubes (Sh5) connects, and tie point is denoted as terminal Z；The transmitting of 21st power switch tube (Sh5)
Pole is connect with the cathode of the 8th capacitance (Cd2)；The collector of 22nd power switch tube (Sh6) and the 8th capacitance (Cd2)
Anode connection；The emitter of 22nd power switch tube (Sh6) is connect with the anode of the 9th capacitance (Cd3), and tie point is denoted as
Terminal Yc；The emitter of 23rd power switch tube (Sh7) is connect with the emitter of the 21st power switch tube (Sh5)；
The collector of 23rd power switch tube (Sh7) is connected with terminal Yc；The collector of 24th power switch tube (Sh8) with
The emitter of 23rd power switch tube (Sh7) connects；The emitter and the 9th capacitance of 24th power switch tube (Sg8)
(Cd3) cathode connection, tie point are denoted as terminal Yd；
Third temporary location (SMC3) includes：Tenth capacitance (Ce1), the 11st capacitance (Ce2), the 12nd capacitance (Ce3), second
15 power switch tubes (Si1), the 26th power switch tube (Si2), the 27th power switch tube (Si3), the 28th
Power switch tube (Si4), the 29th power switch tube (Si5), the 30th power switch tube (Si6)；Wherein each power is opened
It is the active switch pipe with anti-paralleled diode to close pipe；Anode and the 25th power switch of tenth capacitance (Ce1)
The collector connection of (Si1) is managed, tie point is denoted as terminal Xc；The cathode and the 26th power switch tube of tenth capacitance (Ce1)
(Si2) emitter connection, tie point are denoted as terminal Xd；25th power switch tube (Si1) emitter and the 26th work(
The collector of rate switching tube (Si2) connects；The collector and the 26th power switch tube of 27th power switch tube (Si3)
(Si2) collector connection；The emitter of 27th power switch tube (Si3) and the 28th power switch tube (Si4)
Collector connects, and tie point is denoted as terminal Z；The collection of the anode and the 27th power switch tube (Si3) of 11st capacitance (Ce2)
Electrode connects；The emitter of 28th power switch tube (Si4) is connect with the cathode of the 11st capacitance (Ce2)；29th
The emitter of power switch tube (Si5) is connect with the emitter of the 28th power switch tube (Si4), the 29th power switch
The collector for managing (Si5) is connect with the anode of the 12nd capacitance (Ce3), and tie point is denoted as terminal Yc；Terminal Yc is used with terminal Xd
Conducting wire connects, and is equipotential terminal；The collector and the 29th power switch tube (Si5) of 30th power switch tube (Si6)
Emitter connection；The emitter of 30th power switch tube (Si6) is connect with the cathode of the 12nd capacitance (Ce3), tie point
It is denoted as terminal Yd.
5. the Modular multilevel converter according to claim 1 based on switching capacity, which is characterized in that described mostly electric
Level bridge arm includes the first basic unit SMA1 ... SMAn-1 from 1 to n-1 number consecutivelies, temporary location (SMC), from 1 to n-1
Second basic unit SMB1 ... SMBn-1 of number consecutively；The Xa terminals connection for the first basic unit SMA1 that the number is 1
Xb terminals to the poles DC bus P, SMA1 are not connected to any terminal；The first basic unit that the Ya terminals of SMA1 are 2 with number
The Xa terminals of SMA2 connect, and the Yb terminals of SMA1 and the Xb terminals of SMA2 connect；The first base that the Ya terminals of SMA2 are 3 with number
The Xa terminals of this cell S MA3 connect, and the Yb terminals of SMA2 and the Xb terminals of SMA3 connect；And so on to that number is n-2
One basic unit SMA n-2；The Xc terminals of the Ya terminals and temporary location SMC of the first basic unit SMA n-1 that number is n-1
Connection；The Yb terminals of SMA n-1 are connect with the Xd terminals of temporary location SMC；The Yc terminals of temporary location SMC are 1 with number
The Xe terminals of second basic unit SMB1 connect, and the Yd terminals of temporary location SMC and the Xf terminals of SMB1 connect；The ends Ye of SMB1
Son is connect with the Xe terminals for the second basic unit SMB2 that number is 2, and the Yf terminals of SMB1 and the Xf terminals of SMB2 connect；SMB2
Ye terminals connect with the Xe terminals of the second basic unit SMB3 that number is 3, the Yf terminals of SMB2 and the Xf terminals company of SMB3
It connects；And so on to number be n-2 the second basic unit SMB n-2；The second basic unit SMB n-1 that number is n-1
Ye terminals are not connected to any terminal；The Yf terminals of SMB n-1 are connect with the poles DC bus N.
6. the Modular multilevel converter according to claim 1 based on switching capacity, which is characterized in that described mostly electric
The structure of the temporary location (SMC) of level bridge arm is the first temporary location (SMC1), the second temporary location (SMC2), third centre list
Any one in first (SMC3) three.
7. the Modular multilevel converter according to claim 1 based on switching capacity, which is characterized in that described three
The structure of more level bridge arms in parallel is identical, and the Z terminals of the temporary location (SMC) of level bridge arm more than three intersect respectively as a
Flow output end, b phases ac output end, c phase ac output ends.
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| CN201810385336.2A CN108512445B (en) | 2018-04-26 | 2018-04-26 | Modularized multi-level converter based on switched capacitor |
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| CN201810385336.2A CN108512445B (en) | 2018-04-26 | 2018-04-26 | Modularized multi-level converter based on switched capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021159873A1 (en) * | 2020-02-13 | 2021-08-19 | 南京南瑞继保电气有限公司 | Bidirectional energy balance converter chain, electric energy router, and control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001517A (en) * | 2012-11-14 | 2013-03-27 | 国网智能电网研究院 | Modular multi-level voltage source converter submodule device and control method thereof |
| CN107834868A (en) * | 2017-10-25 | 2018-03-23 | 华北电力大学 | A kind of capacitor voltage balance method of the MMC submodules mixed based on double half-bridges and full-bridge in parallel |
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2018
- 2018-04-26 CN CN201810385336.2A patent/CN108512445B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001517A (en) * | 2012-11-14 | 2013-03-27 | 国网智能电网研究院 | Modular multi-level voltage source converter submodule device and control method thereof |
| CN107834868A (en) * | 2017-10-25 | 2018-03-23 | 华北电力大学 | A kind of capacitor voltage balance method of the MMC submodules mixed based on double half-bridges and full-bridge in parallel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021159873A1 (en) * | 2020-02-13 | 2021-08-19 | 南京南瑞继保电气有限公司 | Bidirectional energy balance converter chain, electric energy router, and control method |
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