CN107302307A - A kind of many level power translation circuits of voltage-dropping type and inverter - Google Patents
A kind of many level power translation circuits of voltage-dropping type and inverter Download PDFInfo
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- CN107302307A CN107302307A CN201710742912.XA CN201710742912A CN107302307A CN 107302307 A CN107302307 A CN 107302307A CN 201710742912 A CN201710742912 A CN 201710742912A CN 107302307 A CN107302307 A CN 107302307A
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- switch
- full
- switched capacitor
- capacitor network
- switching capacity
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
- H02M3/072—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps adapted to generate an output voltage whose value is lower than the input voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
This application discloses a kind of many level power translation circuits of voltage-dropping type, including：Full-controlled switch and switched capacitor network；Wherein, full-controlled switch first end is connected with DC power anode, the end of full-controlled switch second is connected with switched capacitor network first end, the end of switched capacitor network second is connected with DC power cathode, and, switched capacitor network by the series connection of N number of electric capacity in controlling switch capacitance network with it is in parallel so that direct current power source voltage decompression obtains different output voltages, N >=2.In the present invention, pass through insertion switch capacitance network, to obtain different output voltages, the multilevel circuit that the present invention is designed need not be to capacitance voltage applied voltage equalizing circuit, also without multiple dc sources, the complexity of circuit design is effectively reduced, circuit reliability of operation is improved.Accordingly, the invention also discloses a kind of inverter and a kind of grid-connected power generation system.
Description
Technical field
The present invention relates to electronic power converter technical field, more particularly to a kind of many level power conversion of voltage-dropping type
Circuit and inverter.
Background technology
The all-controlling power electronics device that many level power converter techniques can make pressure voltage relatively low is to reliably applied to height
High-power field is pressed, and effectively reduces the higher hamonic wave that PWM controls are produced, at present, many level power converter techniques are extensive
The field of transformation of electrical energy is needed applied to various power systems, electric machine speed regulation etc..Among modern science and technology, with battery and super electricity
The distributed energy storage technology that Rong Wei is represented increasingly is paid much attention to by countries in the world, and these new energy and the hair of new technology
Exhibition and application are highly dependent on the high-speed cruising of the inverter circuit among Power Electronic Technique.
Because multi-level inverter circuit has harmonic wave of output voltage content few, device voltage stress is low, electromagnetic interference is few and
The advantages of efficiency high, and be widely used among all kinds of electrical equipments.Typical multi-level inverter circuit includes diode clamp
Bit-type, capacitor pincers bit-type and H bridge cascade connection types.Wherein diode clamp bit-type circuit is needed to ensure that DC bus capacitor is pressed, and it is controlled
Process is extremely difficult, and capacitor pincers bit-type multi-level inverter circuit all has capacitance voltage needs asking for applied voltage equalizing circuit
Topic, and cascading multiple electrical level inverter circuit, using common single-phase full bridge (H bridges) inverter circuit as elementary cell, by several lists
Member is directly connected, and serial number is more, and output level is also more, but the topological structure of these many level power translation circuits with
Control method is complex, and these all undoubtedly both increase system complexity and reduce reliability.Therefore, how electricity is designed
Simple and high reliability the multi-level inverter circuit of line structure is those skilled in the art's urgent problem to be solved.
The content of the invention
In view of this, it is an object of the invention to provide a kind of many level power translation circuits of voltage-dropping type, reduction conversion electricity
The system complexity and raising circuit reliability of operation on road.Its concrete scheme is as follows：
A kind of many level power translation circuits of voltage-dropping type, including：
Full-controlled switch and switched capacitor network；
Wherein, the full-controlled switch first end is connected with DC power anode, the end of full-controlled switch second and institute
The connection of switched capacitor network first end is stated, the end of switched capacitor network second is connected with DC power cathode, also, described opened
Powered-down content network by control in the switched capacitor network series connection of N number of electric capacity with it is in parallel so that direct current power source voltage is depressured
Obtain different output voltages, N >=2.
It is preferred that, the switched capacitor network includes N-1 switching capacity unit and second electric capacity；
Wherein, each switching capacity unit includes the first electric capacity, first switch, second switch and the 3rd switch, and often
The end of second switch second in one switching capacity unit is connected with the 3rd switch first end, and the 3rd the second end of switch is opened with first
First end connection is closed, second switch first end is connected with the first capacitance cathode, and the first electric capacity negative pole connects with first switch first end
Connect；
The second switch in the first capacitance cathode and the i-th -1 switching capacity unit in i-th of switching capacity unit
Two ends are connected, and the end of second switch second in the N-1 switching capacity unit is connected with second capacitance cathode, 1 ＜ i ＜ N；
Second switch first end in 1st switching capacity unit is the switched capacitor network first end, i-th of switch
The end of first switch second and the second electric capacity negative pole in capacitor cell collectively form the end of switched capacitor network second.
It is preferred that, first switch and/or second switch and/or the 3rd switch in each switching capacity unit are two poles
Pipe/igbt；
Wherein, diode cathode/igbt current collection extremely first switch first end/second switch first
End/the three switchs first end, diode cathode/igbt transmitting extremely the second end of first switch/second switch
Second end/3rd switchs the second end.
It is preferred that, the switched capacitor network includes N-1 switching capacity unit and second electric capacity；
Wherein, the switching capacity unit includes the first electric capacity, first switch, second switch and the 3rd switch, each
The end of second switch second in switching capacity unit be connected with the 3rd switch first end, the 3rd the second end of switch and first switch the
One end is connected, and second switch first end is connected with the end of full-controlled switch second；
The first capacitance cathode in first switching capacity unit is connected with second switch first end, the first electric capacity negative pole with
First switch first end is connected；In the first capacitance cathode and the i-th -1 switching capacity unit in i-th of switching capacity unit
The end of second switch second is connected, and the end of second switch second in the N-1 switching capacity unit connects with second capacitance cathode
Connect, 1 ＜ i ＜ N；
Second switch first end in each switching capacity unit collectively forms the switched capacitor network first end, often
The end of first switch second and the second electric capacity negative pole in one switching capacity unit collectively form the switched capacitor network
Second end.
It is preferred that, first switch and/or second switch and/or the 3rd switch in each switching capacity unit are two poles
Pipe/igbt；
Wherein, diode cathode/igbt current collection extremely first switch first end/second switch first
End/the three switchs first end, diode cathode/igbt transmitting extremely the second end of first switch/second switch
Second end/3rd switchs the second end.
It is preferred that, the full-controlled switch is igbt；
Wherein, the extremely described full-controlled switch first end of the gated transistor current collection, the insulated transistor transmitting
The extremely described end of full-controlled switch second.
It is preferred that, in addition to：Inverter circuit；
Wherein, DC power anode is connected with the full-controlled switch first end, complete the second end of control property switch difference
Be connected with the switched capacitor network first end and the inverter circuit first end connection, the end of switched capacitor network second and
The end of inverter circuit second is connected with DC power cathode respectively.
It is preferred that, the inverter circuit is full-bridge circuit；
Wherein, the full-bridge circuit includes the first half-bridge and the second half-bridge, the first half-bridge anode and described the second half
Bridge anode collectively forms the inverter circuit first end, and the first half-bridge negative terminal and the second half-bridge negative terminal collectively form institute
State the end of inverter circuit second.
Accordingly, the invention also discloses a kind of inverter, including many level power conversion electricity of foregoing disclosed voltage-dropping type
Road.
Accordingly, the invention also discloses a kind of grid-connected power generation system, including foregoing disclosed inverter.
In the present invention, a kind of many level power translation circuits of voltage-dropping type, including：Full-controlled switch and switched capacitor network；
Wherein, full-controlled switch first end is connected with DC power anode, the end of full-controlled switch second and switched capacitor network first end
Connection, the end of switched capacitor network second is connected with DC power cathode, also, switched capacitor network passes through controlling switch electric capacity net
In network the series connection of N number of electric capacity with it is in parallel so that direct current power source voltage decompression obtain different output voltages, N >=2.
In the present invention, by insertion switch capacitance network in circuit, when full-controlled switch is turned on, switching capacity net
N number of electric capacity in network is started to charge up, until the electric capacity in switched capacitor network charges to the voltage of dc source, when full-control type is opened
During shut-off, the electric capacity in switched capacitor network starts electric discharge, is now led again by N number of electric capacity in controlling switch capacitance network
In logical and shut-off, the output voltage needed, circuit in the present invention, it is not necessary to the balanced electricity of capacitance voltage applied voltage
Road, it is not required that multiple dc sources, effectively reduces the complexity of circuit design, improves circuit reliability of operation.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of many level power translation circuits of voltage-dropping type disclosed in the embodiment of the present invention one；
When Fig. 2 is that a kind of many level power translation circuit output level numbers of voltage-dropping type are 2 disclosed in the embodiment of the present invention two
Structural representation；
Fig. 3 is that a kind of many level power translation circuit output level numbers of voltage-dropping type are 2 disclosed in the embodiment of the present invention two
Operation mode schematic diagram；
Fig. 4 is that another many level power translation circuit output level numbers of voltage-dropping type are 2 disclosed in the embodiment of the present invention two
Operation mode schematic diagram；
Fig. 5 is one when many level power translation circuit output level numbers of voltage-dropping type disclosed in the embodiment of the present invention two are 2
Individual specific circuit diagram；
Fig. 6 is another when many level power translation circuit output level numbers of voltage-dropping type disclosed in the embodiment of the present invention two are 2
One specific circuit diagram；
Fig. 7 is another when many level power translation circuit output level numbers of voltage-dropping type disclosed in the embodiment of the present invention two are 2
One specific circuit diagram；
Fig. 8 is a kind of structure when a kind of many level power conversion output level numbers are N disclosed in the embodiment of the present invention two
Schematic diagram；
Fig. 9 is a kind of work when a kind of many level power conversion output level numbers are N disclosed in the embodiment of the present invention two
Mode schematic diagram；
Figure 10 is a kind of work when a kind of many level power conversion output level numbers are N disclosed in the embodiment of the present invention two
Mode schematic diagram；
Figure 11 is a kind of work when a kind of many level power conversion output level numbers are N disclosed in the embodiment of the present invention two
Mode schematic diagram；
Figure 12 is that one kind when a kind of many level power conversion output level numbers are N disclosed in the embodiment of the present invention two is specific
Circuit diagram；
Figure 13 is another tool when a kind of many level power conversion output level numbers are N disclosed in the embodiment of the present invention two
Body circuit diagram；
Figure 14 is a kind of structure when a kind of many level power conversion output level numbers are N disclosed in the embodiment of the present invention three
Schematic diagram；
Figure 15 is a kind of work when a kind of many level power conversion output level numbers are N disclosed in the embodiment of the present invention three
Mode schematic diagram；
Figure 16 is a kind of work when a kind of many level power conversion output level numbers are N disclosed in the embodiment of the present invention three
Mode schematic diagram；
Figure 17 is a kind of work when a kind of many level power conversion output level numbers are N disclosed in the embodiment of the present invention three
Mode schematic diagram；
Figure 18 is that one kind when a kind of many level power conversion output level numbers are N disclosed in the embodiment of the present invention three is specific
Circuit diagram；
Figure 19 is another tool when a kind of many level power conversion output level numbers are N disclosed in the embodiment of the present invention three
Body circuit diagram；
Figure 20 is a kind of many level power translation circuits of voltage-dropping type disclosed in the embodiment of the present invention four comprising inverter circuit
Circuit diagram；
Figure 21 is a kind of a kind of physical circuit of many level power translation circuits of voltage-dropping type disclosed in the embodiment of the present invention four
Figure；
Figure 22 is a kind of artificial circuit figure of many level power translation circuits of voltage-dropping type disclosed in the embodiment of the present invention four；
Figure 23 illustrates for a kind of simulation result of many level power translation circuits of voltage-dropping type disclosed in the embodiment of the present invention four
Figure.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The embodiment of the present invention one discloses a kind of many level power translation circuits of voltage-dropping type, shown in Figure 1.
A kind of many level power translation circuits of voltage-dropping type, including：Full-controlled switch and switched capacitor network；Wherein, full control
Type switch first end is connected with DC power anode, and the end of full-controlled switch second is connected with switched capacitor network first end, switch
The end of capacitance network second is connected with DC power cathode, also, switched capacitor network passes through N number of electricity in controlling switch capacitance network
The series connection of appearance with it is in parallel so that direct current power source voltage decompression obtain different output voltages, N >=2.
In the present embodiment, when full-controlled switch is turned on, N number of electric capacity in switched capacitor network is started to charge up, until
Capacitance voltage in switched capacitor network charges to the voltage of dc source, when full-controlled switch is turned off, switched capacitor network
In electric capacity start electric discharge, it is to be understood that by the switch of N number of electric capacity in controlling switch capacitance network, can cause out
N number of electric capacity in powered-down content network has different connected modes, namely different series-parallel connection methods, it is hereby achieved that different
Voltage output.It should be noted that the full-controlled switch in the present embodiment includes but is not limited to igbt, may be used also
To be other full-controlled switch devices, it is not construed as limiting herein.Certainly to the switching component of the electric capacity in switched capacitor network
Also without limiting.
Compared to diode clamp bit-type circuit of the prior art need ensure DC bus capacitor press, capacitor pincers bit-type it is many
Level circuit needs applied voltage equalizing circuit, and H bridge cascading multiple electrical levels inverter circuit needs multiple independent dc sources；
And in the circuit of the present invention, by insertion switch capacitance network in circuit, when full-controlled switch is turned on, switching capacity net
N number of electric capacity in network is started to charge up, until the electric capacity in switched capacitor network charges to the voltage of dc source, when full-control type is opened
During shut-off, the electric capacity in switched capacitor network starts electric discharge, is now led again by N number of electric capacity in controlling switch capacitance network
In logical and shut-off, the output voltage needed, circuit in the present invention, it is not necessary to the balanced electricity of capacitance voltage applied voltage
Road, it is not required that multiple dc sources, effectively reduces the complexity of circuit design, improves circuit reliability of operation.
The embodiment of the present invention two discloses a kind of many level power translation circuits of specific voltage-dropping type, implements relative to upper one
Example, the present embodiment has made further instruction and optimization to technical scheme.Specifically：
For the inventive principle to the present invention, there is clearer elaboration, referring first to Fig. 2, a kind of many level work(of voltage-dropping type
Structural representation when rate translation circuit output level number is 2；
When the switched capacitor network N in many level power translation circuits is equal to 2, switched capacitor network 12 includes the first electricity
Hold C1, the second electric capacity C2, first switch, second switch and the 3rd switch；Now, DC power anode and full-controlled switch 11 the
One end is connected, and the end of full-controlled switch 11 second is connected with second switch first end, the end of second switch second and the 3rd switch first
End connection, the 3rd the second end of switch is connected with first switch first end, and the end of first switch second is connected with DC power cathode, the
One electric capacity C1 positive poles are connected with second switch first end, and the first electric capacity C1 negative poles are connected with first switch first end, the second electric capacity
C2 positive poles are connected with the 3rd switch first end, and the second electric capacity C2 negative poles are connected with the end of first switch second, voltmeter positive pole and the
Two switch first end connections, voltmeter negative pole is connected with the second electric capacity negative pole, wherein, voltmeter is many level DCs electricity of measurement
Voltmeter.
Shown in Figure 3, when full-controlled switch 11 is turned on, switched capacitor network is started to charge up, when first switch and
Two switches are simultaneously turned off, during three switch conductions, and the first electric capacity C1 and the second electric capacity C2 are connected by the 3rd switch, until first
Electric capacity C1 and the second electric capacity C2 voltage are charged to the half of input DC power voltage, namely 0.5V.
Shown in Figure 4, when full-controlled switch 11 is turned off, switched capacitor network starts electric discharge, when first switch and the
Two switch conductions, during three switch OFFs, the first electric capacity C1 and the second electric capacity C2 are in parallel by first switch and second switch, this
When voltmeter can show many level power translation circuits can export the first electric capacity C1 and the second capacitor C2 it is in parallel after capacitance group
The voltage of conjunction, that is, export the half of input DC power voltage, namely 0.5V.
Specifically, the first switch, second switch and the 3rd switch in switched capacitor network include but is not limited to be two poles
Pipe either igbt；It is three specific electricity of three kind of two level power translation circuit referring to Fig. 5, Fig. 6, Fig. 7
Lu Tu.
As shown in figure 5, it is diode that the first switch in the two level power transfer circuits, which is diode D1, second switch,
D2 and the 3rd switch be diode D3, full-controlled switch 11 be insulated gate bipolar transistor IGBT when, DC power anode with absolutely
Edge grid bipolar transistor pipe collector is connected, and igbt emitter stage is connected with second switch D2 negative poles, second switch
D2 positive poles are connected with the 3rd switch D3 negative poles, and the 3rd switch D3 positive poles are connected with first switch D1 negative poles, first switch D1 positive poles
It is connected with DC power cathode, the first electric capacity C1 positive poles are connected with second switch D2 negative poles, the first electric capacity C1 negative poles are opened with first
The connection of D1 negative poles is closed, the second electric capacity C2 positive poles are connected with the 3rd switch negative pole, the second electric capacity C2 negative poles and first switch D1 positive poles
Connection, specific work process, as it was previously stated, will not be repeated here.
As shown in fig. 6, it is diode that the first switch in the two level power transfer circuits, which is diode D1, second switch,
D2, the 3rd switch are igbt T3, when full-controlled switch 11 is insulated gate bipolar transistor IGBT, dc source
Positive pole is connected with insulated gate bipolar transistor IGBT colelctor electrode, and insulated gate bipolar transistor IGBT emitter stage is born with second switch D2
Pole is connected, and second switch D2 positive poles are connected with the 3rd switch insulation grid bipolar transistor T3 colelctor electrodes, and the 3rd switch insulation grid are double
Gated transistors T3 emitter stages are connected with first switch D1 negative poles, and first switch D1 positive poles are connected with DC power cathode, the first electricity
Hold C1 positive poles to be connected with second switch D2 negative poles, the first electric capacity C1 negative poles are connected with first switch D1 negative poles, and the second electric capacity C2 is just
Pole is connected with the 3rd switch insulation grid bipolar transistor T3 colelctor electrodes, and the second electric capacity C2 negative poles are connected with first switch D1 positive poles,
Specific work process, as it was previously stated, will not be repeated here.
Opened as shown in fig. 7, working as the first switch in two level power transfer circuits for igbt T1, second
Pass is that igbt T2, the 3rd switch are igbt T3, and full-controlled switch 11 is insulated gate bipolar
During transistor IGBT, DC power anode is connected with insulated gate bipolar transistor IGBT colelctor electrode, igbt
IGBT emitter stages are connected with second switch igbt T2 colelctor electrodes, second switch igbt T2 hairs
Emitter-base bandgap grading is connected with the 3rd switch insulation grid bipolar transistor T3 colelctor electrodes, the 3rd switch insulation grid bipolar transistor T3 emitter stages with
First switch igbt T1 colelctor electrodes are connected, first switch igbt T1 emitter stages and direct current
Source negative pole connection, the first electric capacity C1 positive poles are connected with second switch igbt T2 colelctor electrodes, and the first electric capacity C1 is born
Pole is connected with first switch igbt T1 colelctor electrodes, the second electric capacity C2 positive poles and the 3rd bipolar crystalline substance of switch insulation grid
Body pipe T3 colelctor electrodes are connected, and the second electric capacity C2 negative poles are connected with first switch igbt T1 emitter stages, specific work
Make process, as it was previously stated, will not be repeated here.
As shown in figure 8, when containing N number of electric capacity in switched capacitor network, switched capacitor network includes N-1 switching capacity
Unit and second electric capacity；
Wherein, each switching capacity unit includes the first electric capacity, first switch, second switch and the 3rd switch, and often
The end of second switch second in one switching capacity unit is connected with the 3rd switch first end, and the 3rd the second end of switch is opened with first
First end connection is closed, second switch first end is connected with the first capacitance cathode, and the first electric capacity negative pole connects with first switch first end
Connect；
The second switch in the first capacitance cathode and the i-th -1 switching capacity unit in i-th of switching capacity unit
Two ends are connected, and the end of second switch second in the N-1 switching capacity unit is connected with the second capacitance cathode, 1 ＜ i ＜ N；
Second switch first end in 1st switching capacity unit is switched capacitor network first end, theiIndividual switching capacity
The end of first switch second and the second electric capacity negative pole in unit collectively form the end of switched capacitor network second.
Afterwards, full-controlled switch first end is connected with DC power anode, full control property the second end of switch and switching capacity net
Network first end is connected, and the end of switched capacitor network second is connected with DC power cathode, referring specifically to Fig. 8.
As shown in figure 9, when the full-controlled switch 11 in Fig. 8 is turned on, each switching capacity in switched capacitor network
The first switch and second switch of unit are turned off, and the 3rd switch conduction, then all first electric capacity in switched capacitor network
C1 connects, then is connected with the second electric capacity C2, and now the charging voltage of each capacitor in switched capacitor network isNow
Many level buck type circuit outputs magnitude of voltage be V.
As shown in Figure 10, when the full-controlled switch 11 in Fig. 8 is turned off, the 1st to the i-th -1 in switched capacitor network is opened
The first switch and second switch closed in capacitor cell are turned off, and the 3rd switch conduction；In i-th to the N-1 switching capacity
First switch and second switch conducting, and the 3rd switch OFF；Then i-th in switched capacitor network is to the N-1 switching capacity
All first electric capacity C1 in unit are in parallel then in parallel with the second electric capacity C2, form a capacitance group in parallel；Switching capacity net
The 1st switching capacity unit in network is toi-1In individual switching capacity all first electric capacity C1 series connection, then with electric capacity in parallel
Group series connection, eventually forms the capacitance group of a series connection, and multi-level circuit output valve now is
As shown in figure 11, when the full-controlled switch 11 in Fig. 8 is turned off, all switching capacity lists in switched capacitor network
First switch and second switch in member are all turned on, and the 3rd switch OFF；Then all switching capacities in switched capacitor network
First electric capacity C1 of unit is in parallel, then in parallel with the second electric capacity C2, forms shunt capacitance group；Then many level buck circuits now
The magnitude of voltage of output is
As can be seen here, by the above method, it can be obtained by the annexation of N number of electric capacity in controlling switch capacitance network
To the different output voltage of N kinds, namely reach the purpose for exporting many level.
Specifically, first switch and/or second switch in each switching capacity unit in the present embodiment and/or
3rd switch is diode/igbt；
Wherein, diode cathode/igbt current collection extremely first switch first end/second switch first
End/the three switchs first end, diode cathode/igbt transmitting extremely the second end of first switch/second switch
Second end/3rd switchs the second end.
Figure 12 is that first switch, second switch and the 3rd switch in the present embodiment are respectively igbt
A kind of physical circuit figure；Figure 13 is that first switch and second switch in the present embodiment is that diode, the 3rd switch are insulated gate
A kind of physical circuit figure in the case of bipolar transistor, its operation principle is as described above, therefore not to repeat here.Certain first opens
Close, second switch and the 3rd switch can also be other components, all are not limited herein for the purpose of reaching practical application
It is fixed.
The embodiment of the present invention three discloses a kind of many level power translation circuits of specific voltage-dropping type, referring to Figure 14, relatively
In a upper embodiment, the present embodiment has made further instruction and optimization to technical scheme.Specifically：
When switched capacitor network includes N-1 switching capacity unit and second electric capacity；
Wherein, switching capacity unit includes the first electric capacity, first switch, second switch and the 3rd switch, each switch
The end of second switch second in capacitor cell is connected with the 3rd switch first end, the 3rd the second end of switch and first switch first end
Connection, second switch first end is connected with the end of full-controlled switch second；
The first capacitance cathode in first switching capacity unit is connected with second switch first end, the first electric capacity negative pole with
First switch first end is connected；In the first capacitance cathode and the i-th -1 switching capacity unit in i-th of switching capacity unit
The end of second switch second is connected, and the end of second switch second in the N-1 switching capacity unit is connected with the second capacitance cathode, and 1
≤i≤N；
Second switch first end in each switching capacity unit collectively forms switched capacitor network first end, each
The end of first switch second and the second electric capacity negative pole in switching capacity unit collectively form the end of switched capacitor network second.
Afterwards, full-controlled switch first end is connected with DC power anode, the end of full-controlled switch second and switching capacity net
Network first end is connected, and the end of switched capacitor network second is connected with DC power cathode, for details, reference can be made to Figure 14.
With reference to Figure 15, when the full-controlled switch 11 in Figure 14 is turned on, each switching capacity in switched capacitor network
First switch and second switch in unit are turned off, and the 3rd switch conduction；Then each in switched capacitor network is switched
The first electric capacity C1 series connection of capacitor cell, then connected with the second electric capacity C2, the capacitance group of a series connection is formed, now switching capacity
Each capacitor in network is charged to direct current power source voltageThe electricity of many level buck type circuit outputs now
Pressure value is V.
With reference to Figure 16, when the full-controlled switch 11 in Figure 14 is turned off, the 1st switching capacity list in switched capacitor network
First switch and second switch shut-off of the member into the i-th -1 switching capacity unit, and the 3rd switch conduction；I-th of switch electricity
Hold the second switch and the 3rd switch OFF in unit, and first switch is turned on；I+1 switching capacity unit is to N-1
First switch, second switch and the 3rd switch in switching capacity unit is all off；Now, the 1st in switched capacitor network
Individual switching capacity unit into the i-th -1 switching capacity unit all first electric capacity C1 series connection, then with i-th of switching capacity list
The first electric capacity C1 series connection in member, forms the capacitance group of a series connection, the magnitude of voltage of many level buck type circuit outputs now
For
With reference to Figure 17, when the full-controlled switch 11 in Figure 14 is turned off, all switching capacity lists in switched capacitor network
First switch and second switch conducting in member, and the 3rd switch OFF；All switching capacity units in switched capacitor network
In the first electric capacity C1 it is in parallel then in parallel with the second electric capacity C2, eventually form a capacitance group in parallel, many level now drop
The magnitude of voltage of die mould circuit output
As can be seen here, by the above method, it can be obtained by the annexation of N number of electric capacity in controlling switch capacitance network
To the different output voltage of N kinds, namely reach the purpose for exporting many level.
Specifically, first switch and/or second switch in each switching capacity unit in the present embodiment and/or
3rd switch is diode/igbt；
Wherein, diode cathode/igbt current collection extremely first switch first end/second switch first
End/the three switchs first end, diode cathode/igbt transmitting extremely the second end of first switch/second switch
Second end/3rd switchs the second end.
Figure 18 is that first switch, second switch and the 3rd switch in the present embodiment are respectively igbt
A kind of physical circuit figure；Figure 19 is that first switch and second switch in the present embodiment is that diode, the 3rd switch are insulated gate
A kind of physical circuit figure in the case of bipolar transistor, its operation principle is as described above, therefore not to repeat here.Certain first opens
Close, second switch and the 3rd switch can also be other components, all are not limited herein for the purpose of reaching practical application
It is fixed.
The embodiment of the present invention four discloses a kind of many level power translation circuits of specific voltage-dropping type, referring to Figure 20, relatively
In a upper embodiment, the present embodiment has made further instruction and optimization to technical scheme.Specifically：
A kind of many level power translation circuits 10 of voltage-dropping type, in addition to inverter circuit 13；
Wherein, DC power anode is connected with full-controlled switch first end, and the end of full-controlled switch second is electric with switch respectively
Content network first end and the connection of inverter circuit first end, the end of switched capacitor network second and the end of inverter circuit second respectively with direct current
Power cathode is connected.
Specifically, inverter circuit is full-bridge circuit in the present embodiment；
Wherein, full-bridge circuit includes the first half-bridge and the second half-bridge, the first half-bridge anode and the second common structure of half-bridge anode
Into inverter circuit first end, the first half-bridge negative terminal and the second half-bridge negative terminal collectively form the end of inverter circuit second.
Join as shown in Figure 21, as the N=2 in capacitance switch network 12, now including the first electric capacity C1, the second electric capacity
C2, the first diode D1, the second diode D2 and the 3rd diode D3, full-controlled switch 11 are igbt
IGBT, many level power translation circuit figures of a kind of voltage-dropping type when inverter circuit 13 is full-bridge circuit are, it is necessary to explanation, inversion
The form of circuit includes but is not limited to full-bridge circuit, can also have other inverter circuits, be not construed as limiting herein.
Specifically, inverter circuit 13 include the first igbt, it is the second igbt, the 3rd exhausted
Edge grid bipolar transistor, the 4th igbt and load；
Wherein, the first igbt colelctor electrode is connected with the 3rd igbt colelctor electrode, and the 3rd
Igbt emitter stage is connected with the 4th igbt colelctor electrode, the 4th igbt hair
Emitter-base bandgap grading is connected with the second igbt emitter stage, and the second igbt colelctor electrode and the first insulated gate are double
Gated transistors emitter stage is connected, and load two ends are brilliant with the first igbt emitter stage and the 3rd insulated gate bipolar respectively
Body pipe emitter stage is connected, and the first igbt colelctor electrode is collectively formed with the 3rd igbt colelctor electrode
Inverter circuit first end, the 4th igbt emitter stage is collectively formed with the second igbt emitter stage
The end of inverter circuit second.
Below with regard to its connected mode, it is specifically addressed：
DC power anode is connected with the first end of full-controlled switch 11, the end of full-controlled switch 11 second respectively with switching capacity
The first end of network 12 and the connection of the first end of inverter circuit 13, the end of switched capacitor network 12 second and the end of inverter circuit 13 second difference
It is connected with DC power cathode.
The analogous diagram of the multilevel circuit in Figure 21 is given below, referring to Figure 22, its simulation parameter is specially：Input
Direct current power source voltage is that 100V, the first electric capacity C1 and the second electric capacity C2 value are 1000 μ F, and load resistance is 100 Ω；Full control
The switching frequency of type switch 11 is 100Hz and ON time is between 180 °~270 °；Four insulated gates are double in inverter circuit 13
The switching frequency of gated transistors is 50Hz, and the first igbt ON time is between 0 °~180 °, second insulate
Grid bipolar transistor ON time is between 180 °~360 °, the 3rd igbt ON time is 225 °~360 °
Between, the 4th igbt ON time be 45 °~180 ° between, reference can be made to shown in Figure 22；U1 and U2 points in figure
The voltmeter of the electric and many level alternating current of many level DCs Wei not measured.
Figure 23 is simulation result, and result is shown in figure, when input direct voltage is by switched capacitor network, voltmeter
U1 can export the direct current of two kinds of level of 100V and 50V, and when can be by full bridge inverter, voltmeter U2 can be exported
100V, 50V, -100V, the alternating current of five kinds of level of -50V and 0V, its frequency are 50Hz.As shown in Figure 23, the electricity in the present invention
The exportable magnitude of voltage corresponded to actual needs of road figure.
Accordingly, the invention also discloses a kind of inverter, including many level power conversion electricity of foregoing disclosed voltage-dropping type
Road.
The application of inverter widely, in common AC power power supply unit, DC source solar panel and electricity
Chi Zhong, can see inverter, if many level power translation circuits of voltage-dropping type provided in inverter using the present invention, will
The practical performance of inverter can be improved.
Accordingly, the invention also discloses a kind of grid-connected power generation system, including foregoing disclosed inverter.
With the reinforcement of people's environmental consciousness, new energy power generation technology is increasingly subject to pay attention to, in order to improve in electricity generation system
Generating efficiency, the generating efficiency in electricity generation system can be improved using inverter disclosed by the invention.
Finally, in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between there is any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of key elements not only include that
A little key elements, but also other key elements including being not expressly set out, or also include be this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except also there is other identical element in the process including the key element, method, article or equipment.
A kind of many level power varying circuits of voltage-dropping type provided by the present invention are described in detail above, herein
Apply specific case to be set forth the principle and embodiment of the present invention, the explanation of above example is only intended to help
Understand the method and its core concept of the present invention；Simultaneously for those of ordinary skill in the art, according to the thought of the present invention,
It will change in specific embodiments and applications, in summary, this specification content should not be construed as to this
The limitation of invention.
Claims (10)
1. a kind of many level power translation circuits of voltage-dropping type, it is characterised in that including：
Full-controlled switch and switched capacitor network；
Wherein, the full-controlled switch first end is connected with DC power anode, and the end of full-controlled switch second is opened with described
Powered-down content network first end connection, the end of switched capacitor network second is connected with DC power cathode, also, the switch electricity
Content network by control in the switched capacitor network series connection of N number of electric capacity with it is in parallel so that direct current power source voltage decompression is obtained
Different output voltages, N >=2.
2. circuit according to claim 1, it is characterised in that the switched capacitor network includes N-1 switching capacity list
Member and second electric capacity；
Wherein, each switching capacity unit includes the first electric capacity, first switch, second switch and the 3rd switch, and each
The end of second switch second in switching capacity unit be connected with the 3rd switch first end, the 3rd the second end of switch and first switch the
One end is connected, and second switch first end is connected with the first capacitance cathode, and the first electric capacity negative pole is connected with first switch first end；
The end of second switch second in the first capacitance cathode and the i-th -1 switching capacity unit in i-th of switching capacity unit
The end of second switch second in connection, the N-1 switching capacity unit is connected with second capacitance cathode, 1 ＜ i ＜ N；
Second switch first end in 1st switching capacity unit is the switched capacitor network first end, theiIndividual switching capacity
The end of first switch second and the second electric capacity negative pole in unit collectively form the end of switched capacitor network second.
3. circuit according to claim 2, it is characterised in that first switch in each switching capacity unit and/or
Second switch and/or the 3rd switch be diode/igbt；
Wherein, diode cathode/igbt current collection extremely first switch first end/second switch first end/the
Three switch first ends, diode cathode/igbt transmitting extremely the second end of first switch/second switch second
End/the three switchs the second end.
4. circuit according to claim 1, it is characterised in that the switched capacitor network includes N-1 switching capacity list
Member and second electric capacity；
Wherein, the switching capacity unit includes the first electric capacity, first switch, second switch and the 3rd switch, each switch
The end of second switch second in capacitor cell is connected with the 3rd switch first end, the 3rd the second end of switch and first switch first end
Connection, second switch first end is connected with the end of full-controlled switch second；
The first capacitance cathode in first switching capacity unit is connected with second switch first end, the first electric capacity negative pole and first
Switch first end connection；Second in the first capacitance cathode and the i-th -1 switching capacity unit in i-th of switching capacity unit
The end of second switch second switched in the connection of the second end, the N-1 switching capacity unit is connected with second capacitance cathode, and 1
＜ i ＜ N；
Second switch first end in each switching capacity unit collectively forms the switched capacitor network first end, each
The end of first switch second and the second electric capacity negative pole in switching capacity unit collectively form the switched capacitor network second
End.
5. circuit according to claim 4, it is characterised in that first switch in each switching capacity unit and/or
Second switch and/or the 3rd switch be diode/igbt；
Wherein, diode cathode/igbt current collection extremely first switch first end/second switch first end/the
Three switch first ends, diode cathode/igbt transmitting extremely the second end of first switch/second switch second
End/the three switchs the second end.
6. circuit according to claim 1, it is characterised in that the full-controlled switch is igbt；
Wherein, the extremely described full-controlled switch first end of the gated transistor current collection, the insulated transistor transmitting is extremely
The end of full-controlled switch second.
7. the circuit according to any one of claim 1 to 6, it is characterised in that also include：Inverter circuit；
Wherein, DC power anode is connected with the full-controlled switch first end, it is described it is full control property switch the second end respectively with institute
State switched capacitor network connection first end and inverter circuit first end connection, the end of switched capacitor network second and described
The end of inverter circuit second is connected with DC power cathode respectively.
8. circuit according to claim 7, it is characterised in that the inverter circuit is full-bridge circuit；
Wherein, the full-bridge circuit includes the first half-bridge and the second half-bridge, and the first half-bridge anode and second half-bridge are just
End collectively forms the inverter circuit first end, and the first half-bridge negative terminal and the second half-bridge negative terminal collectively form described inverse
Become the end of circuit second.
9. a kind of inverter, it is characterised in that including many level power conversion of voltage-dropping type described in any one of claim 1 to 8
Circuit.
10. a kind of grid-connected power generation system, it is characterised in that including the inverter described in claim 9.
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| CN201710742912.XA CN107302307A (en) | 2017-08-25 | 2017-08-25 | A kind of many level power translation circuits of voltage-dropping type and inverter |
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| CN201710742912.XA CN107302307A (en) | 2017-08-25 | 2017-08-25 | A kind of many level power translation circuits of voltage-dropping type and inverter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112943A (en) * | 2019-05-20 | 2019-08-09 | 广东工业大学 | A kind of both-end multi-level inverter circuit and inversion system |
| CN111884533A (en) * | 2020-07-13 | 2020-11-03 | 广东工业大学 | Multi-level boost inverter circuit based on double-switch capacitor |
| CN113507229A (en) * | 2021-07-06 | 2021-10-15 | 国网福建省电力有限公司检修分公司 | Wide-input step-down inversion system based on switched capacitor network and control method |
| CN117955336A (en) * | 2024-03-27 | 2024-04-30 | 成都市易冲半导体有限公司 | Power converter, power conversion method, charging chip and charger |
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| CN205160401U (en) * | 2015-11-04 | 2016-04-13 | 华南理工大学 | Electric capacity is from many level of voltage -sharing high frequency dc -to -ac converter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112943A (en) * | 2019-05-20 | 2019-08-09 | 广东工业大学 | A kind of both-end multi-level inverter circuit and inversion system |
| CN110112943B (en) * | 2019-05-20 | 2021-04-16 | 广东工业大学 | Double-end multi-level inverter circuit and inverter system |
| CN111884533A (en) * | 2020-07-13 | 2020-11-03 | 广东工业大学 | Multi-level boost inverter circuit based on double-switch capacitor |
| CN111884533B (en) * | 2020-07-13 | 2023-08-08 | 广东工业大学 | Multi-level boosting inverter circuit based on double-switch capacitor |
| CN113507229A (en) * | 2021-07-06 | 2021-10-15 | 国网福建省电力有限公司检修分公司 | Wide-input step-down inversion system based on switched capacitor network and control method |
| CN117955336A (en) * | 2024-03-27 | 2024-04-30 | 成都市易冲半导体有限公司 | Power converter, power conversion method, charging chip and charger |
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Application publication date: 20171027 |