CN106787891A - A kind of five-electrical level inverter - Google Patents
A kind of five-electrical level inverter Download PDFInfo
- Publication number
- CN106787891A CN106787891A CN201710128511.5A CN201710128511A CN106787891A CN 106787891 A CN106787891 A CN 106787891A CN 201710128511 A CN201710128511 A CN 201710128511A CN 106787891 A CN106787891 A CN 106787891A
- Authority
- CN
- China
- Prior art keywords
- switch pipe
- switching tube
- carrier wave
- electrical level
- bridge arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/487—Neutral point clamped inverters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
This application discloses a kind of five-electrical level inverter, including three-level DC converter and polarity switching.Three-level DC converter includes DC source, the first capacitance switch pipe, the second capacitance switch pipe, the first electric capacity, the second electric capacity, the first lever selection switching tube, second electrical level selecting switch pipe, the 3rd lever selection switching tube, the first diode and the second diode.The input of polarity switching is connected with three-level DC converter, and output end is used in parallel with power network or in parallel with load circuit.Maximum level is the level of twice DC source in five level of the five-electrical level inverter output that the application is provided, and the utilization rate of DC source is very high；Three-level DC converter can export stabilization with direct current source size identical level, solve the problems, such as that directly providing output level using the electric capacity after discharge and recharge in the prior art causes that five-electrical level inverter midpoint potential is uneven, output level accuracy is relatively low.
Description
Technical field
The application is related to electric and electronic technical field, more particularly to a kind of five-electrical level inverter.
Background technology
Multi-electrical level inverter is a kind of generating equipment for dc source being converted to AC power, in high power applications
Institute, such as photovoltaic generation, wind-power electricity generation and new energy cogeneration, multi-electrical level inverter are big due to that can provide good big voltage
Electric current, is just generating electricity as main flow and is selecting, and application prospect is extensive.
The wider multi-electrical level inverter of application includes five-electrical level inverter at present, is five electricity of the prior art referring to Fig. 1
Flat inverter structure schematic diagram, as shown in figure 1, existing five-electrical level inverter is usually neutral-point-clamped type five-electrical level inverter, directly
The electric capacity C1 and C2 of stream source Vdc and identical capacity connect, and the upper voltage of electric capacity C1 and C2 is Vdc/2, electric capacity C1 and C2 it
Between node O points as referring to zero potential, as neutral-point-clamped.Connected respectively after switch transistor T 3 and T4 series connection, T5 and T6 series connection
To node O.Switch transistor T 1, T2, T7 and T8 constitutes the H bridges with polarity of voltage translation function, when the shut-off of other switching tubes, switch
When pipe T1, T8 are turned on or switch transistor T 2, T7 is turned on, the output level that inverter is exported to power network Grid is respectively Vdc or-Vdc.
When switch transistor T 3-T6 is turned on, the absolute value of the output level of inverter is the level of electric capacity C2, i.e. Vdc/2.When H bridges
Short circuit is the shut-off of other switching tubes, and when the conducting of switch transistor T 2, T8 or switch transistor T 1, T7 are turned on, inverter output level is 0.
Be can be seen that when switch transistor T 3-T6 is turned on from the structure and its operation principle of above-mentioned five-electrical level inverter, electric capacity
C2 is discharged, so as to provide the inverter output level that size is Vdc/2, in the case of other conductings, electric capacity C2 is charged,
Inverter output level, or the short circuit of H bridges are provided by DC source, inverter output level is 0.Because electric capacity C2 is in charge and discharge process
In can produce voltage change, make electric capacity C2 voltages in electric discharge be difficult to be stably maintained at Vdc/2 current potentials, and then cause existing
The accuracy of five-electrical level inverter output level is relatively low.
The content of the invention
It is low to solve existing five-electrical level inverter output level accuracy this application provides a kind of five-electrical level inverter
Problem.
This application provides a kind of five-electrical level inverter, the five-electrical level inverter includes：Three-level DC converter and
The polarity switching in parallel with the three-level DC converter, wherein,
The three-level DC converter includes the DC source, the first capacitance switch pipe and the second capacitance switch that are sequentially connected in series
Pipe；
It is connected with the positive pole of the first diode near one end of the DC source in the first capacitance switch pipe, described the
The negative pole of one diode is connected with one end of the first electric capacity, in the other end of first electric capacity and the first capacitance switch pipe
Connect one end connection of the second capacitance switch pipe；
It is connected with the negative pole of the second diode near one end of the DC source in the second capacitance switch pipe, described the
The positive pole of two diodes is connected with one end of the second electric capacity, in the other end of second electric capacity and the second capacitance switch pipe
Connect one end connection of the first capacitance switch pipe；
If the first capacitance switch pipe conducting, the second capacitance switch pipe shut-off, if second electric capacity
Switching tube is turned on, then the first capacitance switch pipe shut-off, and the ON time and the second electric capacity of the first capacitance switch pipe are opened
The ON time for closing pipe is respectively the first default ON time and the second default ON time；
One end of first lever selection switching tube is connected with the negative pole of first diode, the other end turns with the polarity
Change electrode input end connection in circuit；
One end of second electrical level selecting switch pipe is connected the second capacitance switch pipe with the first capacitance switch pipe
One end connection, the other end is connected with electrode input end in the polarity switching；
3rd lever selection switch one end be connected with electrode input end in the polarity switching, the other end respectively with
Negative input connection in the positive pole and the polarity switching of second diode；
The output end of the polarity switching is used in parallel with power network or in parallel with load circuit.
Preferably, the described first default ON time and the second default ON time are identical.
Preferably, the polarity switching includes the first bridge arm switching tube, the second bridge arm switching tube, the 3rd bridge arm switch
Pipe and four bridge legs switching tube, in the polarity switching electrode input end respectively with the first bridge arm switching tube, the 3rd
One end connection of bridge arm switching tube, the first bridge arm switching tube, the other end of the 3rd bridge arm switching tube are respectively with described second
One end connection of bridge arm switching tube, four bridge legs switching tube, the second bridge arm switching tube, the other end of four bridge legs switching tube
It is connected with negative input in the polarity switching, a port of output end is arranged in the polarity switching
Between the first bridge arm switching tube, the second bridge arm switching tube, another port be arranged on the 3rd bridge arm switching tube, the 4th
Between bridge arm switching tube.
Preferably, if the first bridge arm switching tube is turned on, the four bridge legs switching tube conducting, described second,
3rd bridge arm switching tube is turned off；
If the second bridge arm switching tube conducting, the 3rd bridge arm switching tube conducting, described first, four bridge legs
Switching tube is turned off.
Preferably, the first capacitance switch pipe and the second capacitance switch pipe include full-control type IGCT.
Preferably, if the first lever selection switching tube is turned on, the second electrical level selecting switch pipe and the 3rd
Lever selection switching tube is turned off；
If the second electrical level selecting switch pipe conducting, the first lever selection switching tube and the 3rd lever selection
Switching tube is turned off；
If the 3rd lever selection switching tube conducting, the second electrical level selecting switch pipe and the first lever selection
Switching tube is turned off.
Preferably, predetermined threshold value is more than more than the difference of second capacitance voltage according to first capacitance voltage, is led
Lead to second electric capacity, turn off first electric capacity, the difference according to first capacitance voltage less than second capacitance voltage
Value is less than predetermined threshold value, turns on first electric capacity, turns off second electric capacity.
Preferably, the control signal modulation system of the five-electrical level inverter includes that carrier wave is laminated modulation, the carrier wave layer
The modulating wave of folded modulation includes sine wave.
Preferably, the carrier wave of the carrier wave stacking modulation includes that first carrier, the second carrier wave, the 3rd carrier wave and the 4th are carried
Ripple, wherein,
The first carrier, the second carrier wave, the 3rd carrier wave and the 4th carrier wave include triangular wave, the first carrier, the
The amplitude of nd carrier, the 3rd carrier wave and the 4th carrier wave is identical, frequency is identical, phase is identical；
The first carrier, the second carrier wave and the 3rd carrier wave, the 4th carrier wave are stacked on top of one another in same coordinate system, adjacent
In two carrier waves, the minimum value of one of carrier wave is the maximum of another carrier wave；
, less than the maximum of the first carrier, the minimum value of the modulating wave is less than described for the maximum of the modulating wave
The minimum value of the 4th carrier wave.
The beneficial effect of the five-electrical level inverter that the application is provided includes：
The five-electrical level inverter that the application is provided, including three-level DC converter and polarity switching.Three level are straight
Current converter includes DC source, the first capacitance switch pipe, the second capacitance switch pipe, the first electric capacity, the second electric capacity, the choosing of the first level
Select switching tube, second electrical level selecting switch pipe, the 3rd lever selection switching tube, the first diode and the second diode.By control
The conducting of the first capacitance switch pipe and the second capacitance switch pipe is made, the first electric capacity and the second electric capacity can be made to export respectively and DC source
Size identical level, using the first lever selection switching tube, second electrical level selecting switch pipe and the 3rd lever selection switching tube,
Achievable three-level DC converter export respectively with direct current source size identical level, the level of twice direct current source size and
Zero level, using polarity switching, is capable of achieving the polarity of conversion three-level DC converter output level, so that the application
The five-electrical level inverter of offer can export five level.Maximum electricity in five level of the five-electrical level inverter output that the application is provided
It is the level of twice DC source to put down, and the utilization rate of DC source is very high；Opened by controlling the first capacitance switch pipe and the second electric capacity
Close pipe conducting, can make three-level DC converter export stabilization with direct current source size identical level, solve existing skill
Five-electrical level inverter output level accuracy is relatively low to ask directly to utilize the electric capacity offer output level after discharge and recharge to cause in art
Topic.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the application, letter will be made to the accompanying drawing to be used needed for embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of five-electrical level inverter in the prior art；
A kind of structural representation of five-electrical level inverter that Fig. 2 is provided for the embodiment of the present application；
A kind of neutral-point-potential balance control structural representation that Fig. 3 is provided for the embodiment of the present application；
A kind of schematic equivalent circuit of five-electrical level inverter that Fig. 4 is provided for the embodiment of the present application；
A kind of carrier wave stacking modulation schematic diagram of five-electrical level inverter that Fig. 5 is provided for the embodiment of the present application；
Lever selection switching tube and comparator output in a kind of five-electrical level inverter that Fig. 6 is provided for the embodiment of the present application
Truth table.
Specific embodiment
It is a kind of structural representation of five-electrical level inverter that the embodiment of the present application is provided referring to Fig. 2.As shown in Fig. 2 this
The five-electrical level inverter that application embodiment is provided, including three-level DC converter and in parallel with three-level DC converter
Polarity switching, three-level DC converter includes the DC source, the first capacitance switch pipe Q that are sequentially connected in series1With the second electric capacity
Switching tube Q2。
Specifically, the first capacitance switch pipe Q1One end of middle DC source and the first diode T1Positive pole connection, the one or two pole
Pipe T1Negative pole and the first electric capacity C1One end connection, the first electric capacity C1The other end and the first capacitance switch pipe Q1Middle connection the
Two capacitance switch pipe Q2One end connection.
Second capacitance switch pipe Q2In near one end of DC source and the second diode T2Negative pole connection, the second diode
T2Positive pole and the second electric capacity C2One end connection, the second electric capacity C2The other end and the second capacitance switch pipe Q2Middle connection first
Capacitance switch pipe Q1One end connection.
First lever selection switching tube S2One end and the first diode T2Negative pole connection, the other end and dipole inversion electricity
Electrode input end connection in road.Second electrical level selecting switch pipe S1One end and the first capacitance switch pipe Q1The second electric capacity of middle connection
Switching tube Q1One end connection, the other end and polarity switching in electrode input end connection.3rd lever selection switchs S0One
End be connected with electrode input end in polarity switching, the other end respectively with the second diode T2Positive pole and polarity switching
Middle negative input connection.The output end of polarity switching is used in parallel with power network or in parallel with load circuit.
Polarity switching includes the first bridge arm switching tube H1, the second bridge arm switching tube H2, the 3rd bridge arm switching tube H3With
Four bridge legs switching tube H4, in polarity switching electrode input end respectively with the first bridge arm switching tube H1, the 3rd bridge arm switching tube H3
One end connection, the first bridge arm switching tube H1, the 3rd bridge arm switching tube H3The other end respectively with the second bridge arm switching tube H2,
Four bridge legs switching tube H4One end connection, the second bridge arm switching tube H2, four bridge legs switching tube H4The other end and dipole inversion
Negative input connection in circuit, a port of output end is arranged on the first bridge arm switching tube H in polarity switching1,
Two bridge arm switching tube H2Between, another port be arranged on the 3rd bridge arm switching tube H3, four bridge legs switching tube H4Between.
In the embodiment of the present application, the first electric capacity C1With the second electric capacity C2The equal electric capacity of selection capacitance, the first capacitance switch
Pipe Q1, the second capacitance switch pipe Q2, the first lever selection switching tube S2, second electrical level selecting switch pipe S1, the 3rd lever selection opens
Close pipe S0And the first bridge arm switching tube H1, the second bridge arm switching tube H2, the 3rd bridge arm switching tube H3With four bridge legs switching tube H4
Full-control type IGCT may be selected, concretely MOSFET (Metal-Oxide-Semiconductor Field-Effect
Transistor, electric power field-effect transistor) or IGBT (Insulated Gate Bipolar Transistor, insulated gate pair
Gated transistors).
In the five-electrical level inverter that the embodiment of the present application is provided, the voltage of DC source is Vin, the first electric capacity C1Magnitude of voltage
It is Vc1, the second electric capacity C2Magnitude of voltage be Vc2.If the first capacitance switch pipe Q1Turn on, then the second capacitance switch pipe Q2Shut-off,
If the second capacitance switch pipe Q2Turn on, then the first capacitance switch pipe Q1Shut-off, i.e. the first capacitance switch pipe Q1Opened with the second electric capacity
Close pipe Q2Alternate conduction, as the first capacitance switch pipe Q1During conducting, the second electric capacity C2Charged, as the second capacitance switch pipe Q2
During conducting, the first electric capacity C1Charged.First capacitance switch pipe Q1ON time be the first default ON time, the second electricity
Hold switching tube Q2ON time be the second default ON time, the first default ON time and the second default ON time phase
Together, i.e. the first capacitance switch pipe Q1With the second capacitance switch pipe Q2Conducting dutycycle is 0.5, then Vc1=Vc2=Vin, so that real
The first electric capacity C is showed1With the second electric capacity C2Between neutral-point potential balance, improve the accuracy of output level.
Further, as the first capacitance switch pipe Q1With the second capacitance switch pipe Q2When conducting dutycycle is 0.5, first
Electric capacity C1With the second electric capacity C2Virtual voltage easily there is certain difference, due to the first capacitance voltage Vc1With the second capacitance switch pipe
Q2ON time positive correlation, the second capacitance voltage Vc2With the first capacitance switch pipe Q1ON time positive correlation, by real-time
Gather and compare the first capacitance voltage Vc1With the second capacitance voltage Vc2, preset using comparative result correction next cycle first
ON time and the second default ON time allocation proportion, can further improve the balance of midpoint potential.It is this referring to Fig. 3
A kind of neutral-point-potential balance control structural representation that application embodiment is provided.As shown in figure 3, by setting the first capacitance voltage
Vc1With the second capacitance voltage Vc2The predetermined threshold value h of difference DELTA ε, if the first capacitance voltage Vc1With the second capacitance voltage Vc2Difference
Δ ε exceeds predetermined threshold value h, then the dutycycle that value is 0.5 is fallen in locking, using hysteresis comparator to the first capacitance switch pipe Q1With
Two capacitance switch pipe Q2Trigger signal be adjusted, specially according to the first capacitance voltage more than the second capacitance voltage difference
Δ ε is more than predetermined threshold value h, and hysteresis comparator is output as 1, turns on the second capacitance switch pipe Q2, shut-off the first capacitance switch pipe Q1,
Realize the first electric capacity C1Many electric discharges, the second electric capacity C2It is charge more, according to the first capacitance voltage Vc1Less than the second capacitance voltage Vc2's
Difference DELTA ε is less than predetermined threshold value h, and hysteresis comparator is output as 1, turns on the first capacitance switch pipe Q1, shut-off the second capacitance switch
Pipe Q2, realize the first electric capacity C1Many chargings, the second electric capacity C2Many electric discharges, progressively reach the balance of voltage.Adjusted using hysteresis comparator
Afterwards, if the first capacitance voltage Vc1With the second capacitance voltage Vc2Difference DELTA ε is less than predetermined threshold value h, then locking is fallen stagnant ring and compared
Device, reuses trigger signal that dutycycle is 0.5 to the first capacitance switch pipe Q1With the second capacitance switch pipe Q2It is controlled.
The five-electrical level inverter that the application is provided has 12 operation modes, works as Vc1=Vc2When, the first electric capacity C1, second electricity
Hold C2Direct voltage source is equivalent to, 12 operation modes are reduced to 6, referring to Fig. 4, for one kind five that the embodiment of the present application is provided
The schematic equivalent circuit of electrical level inverter.As shown in figure 4, the first lever selection switching tube S2, second electrical level selecting switch pipe S1
With the 3rd lever selection switching tube S0Do not simultaneously turn on.If the first lever selection switching tube S2Conducting, then second electrical level selection is opened
Close pipe S1With the 3rd lever selection switching tube S0Shut-off, the output level V of three-level DC converterh=Vc1+Vc2=2Vin.Such as
Fruit second electrical level selecting switch pipe S1Turn on, then the first lever selection switching tube S2With the 3rd lever selection switching tube S0Shut-off, three
The output level V of level DC converterh=Vc2=Vin.If the 3rd lever selection switching tube S0Conducting, then second electrical level choosing
Select switching tube S1With the first lever selection switching tube S2Shut-off, the output level V of three-level DC converterh=0.
Further, in polarity switching, if the first bridge arm switching tube H1Turn on, then four bridge legs switching tube H4Lead
It is logical, the second bridge arm switching tube H2, the 3rd bridge arm switching tube H3Shut-off, now, the output polarity of polarity switching is for just；If
Second bridge arm switching tube H2Turn on, then the 3rd bridge arm switching tube H3Conducting, the first bridge arm switching tube H1, four bridge legs switch
Pipe H4Shut-off, now, the output polarity of polarity switching is negative.
Define the first lever selection switching tube S2, second electrical level selecting switch pipe S1With the 3rd lever selection switching tube S0's
Switch function Si, such as formula (1)：
The first bridge arm switching tube H can similarly be obtained1, the second bridge arm switching tube H2, the 3rd bridge arm switching tube H3Opened with four bridge legs
Close pipe H4Switch function HjDefinition, such as formula (2)：
Ignore five-electrical level inverter output current ioDirection, convolution (1), (2) and mentioned above, five-electrical level inverter
6 operation modes can unify to be logical expression (3)：
| U |=Vh=i (Si=1, i=0,1,2) (3)
If considering five-electrical level inverter output current ioDirection, then 6 operation modes can unify to be logical expression (4)：
In sum, the first capacitance switch pipe Q1, the second capacitance switch pipe Q2ON time be the first default ON time
The first capacitance voltage V is determined with the second default ON timec1With the second capacitance voltage Vc2, switch function SiDetermine three level DC
The output level V of converterh, switch function HjControl the frequency and initial phase of five-electrical level inverter output waveform.The application reality
Shi Zhong, the first capacitance switch pipe Q1, the second capacitance switch pipe Q2With switch function Si, switch function HjSeparate independent control, switch
Function SiWith switch function HjFrequency and phase need synchronization.
It is exactly process that inverter control signal PWM ripples are produced to the modulation of inverter in the embodiment of the present application.Switch letter
Number SiWith switch function HjControl signal PWM wave modulations mode include carrier wave be laminated modulation, carrier wave stacking modulation modulating wave
Including sine wave, carrier wave includes first carrier, the second carrier wave, the 3rd carrier wave and the 4th carrier wave.It is that the application is implemented referring to Fig. 5
A kind of carrier wave stacking modulation schematic diagram of five-electrical level inverter that example is provided.As shown in figure 5, first carrier, the second carrier wave, the 3rd
The amplitude of carrier wave and the 4th carrier wave is identical, frequency is identical, phase is identical.First carrier, the second carrier wave, the 3rd carrier wave and the 4th carry
Ripple is stacked on top of one another in same coordinate system, and in two neighboring carrier wave, the minimum value of one of carrier wave is another carrier wave
Maximum.The maximum of modulating wave is less than the maximum of first carrier, the minimum value of the minimum value less than the 4th carrier wave of modulating wave.
Specifically, coordinate plane is divided into 5 regions by first carrier, the second carrier wave and the 3rd carrier wave, the 4th carrier wave, will
Modulating wave is contrasted with first carrier, the second carrier wave, the 3rd carrier wave and the 4th carrier wave respectively, is corresponding in turn to from the bottom up in defeated
Go out five kinds of level of level U：-2、-1、0、+1、+2.Convolution (1), (4) can be respectively obtained under carrier wave stacking modulation, switch
Function SiWith switch function HjWaveform.
Defining produce the comparator of PWM ripples to be output as 1 when modulating wave is more than carrier wave, can be converted to open the waveform in Fig. 5
Close function SiLogical relation between being exported with four PWM comparators (carrier wave) Mi (i=1,2,3,4), as shown in fig. 6, being this
The truth table that lever selection switching tube is exported with comparator in a kind of five-electrical level inverter that application embodiment is provided.
Switch function S is can obtain using Carlow figure abbreviationiThe logical relation exported with PWM comparators, you can realize five electricity
The modulation of flat inverter, such as formula (7)：
The signal that cut-offs of three lever selection switching tubes is laminated generation by carrier wave, produces 0 ,+1 ,+2 three level, then to H
Bridge input cut-offs signal with carrier wave same frequency, adjusts signal using H bridges positive and negative, you can obtain five kinds of level：-2、-1、0、+
1、+2.Carrier wave is laminated modulated applications when five-electrical level inverter is emulated, the alternating voltage waveform stabilization that inversion is produced is humorous
Ripple aberration rate is low.
As seen from the above-described embodiment, the five-electrical level inverter that the application is provided, maximum level is two in five level of output
The level of times DC source, the utilization rate of DC source is very high；By controlling the first capacitance switch pipe and the second capacitance switch pipe
Conducting, can make three-level DC converter export stabilization with direct current source size identical level, solve straight in the prior art
Connect causes the relatively low problem of five-electrical level inverter output level accuracy, midpoint using the electric capacity offer output level after discharge and recharge
The balance of current potential is high.
Invention described above implementation method is not intended to limit the scope of the present invention..
Claims (9)
1. a kind of five-electrical level inverter, it is characterised in that become including three-level DC converter and with the three level DC
Parallel operation polarity switching in parallel, wherein,
The three-level DC converter includes the DC source, the first capacitance switch pipe and the second capacitance switch pipe that are sequentially connected in series；
One end in the first capacitance switch pipe near the DC source is connected with the positive pole of the first diode, and the described 1st
The negative pole of pole pipe is connected with one end of the first electric capacity, and the other end of first electric capacity is connected with the first capacitance switch pipe
One end connection of the second capacitance switch pipe；
One end in the second capacitance switch pipe near the DC source is connected with the negative pole of the second diode, and the described 2nd 2
The positive pole of pole pipe is connected with one end of the second electric capacity, and the other end of second electric capacity is connected with the second capacitance switch pipe
One end connection of the first capacitance switch pipe；
If the first capacitance switch pipe conducting, the second capacitance switch pipe shut-off, if second capacitance switch
Pipe conducting, then the first capacitance switch pipe shut-off, the ON time of the first capacitance switch pipe and the second capacitance switch pipe
ON time be respectively the first default ON time and the second default ON time；
One end of first lever selection switching tube is connected with the negative pole of first diode, the other end and the dipole inversion are electric
Electrode input end connection in road；
One end of second electrical level selecting switch pipe is connected the one of the second capacitance switch pipe with the first capacitance switch pipe
End connection, the other end are connected with electrode input end in the polarity switching；
3rd lever selection switch one end be connected with electrode input end in the polarity switching, the other end respectively with it is described
Negative input connection in the positive pole of the second diode and the polarity switching；
The output end of the polarity switching is used in parallel with power network or in parallel with load circuit.
2. five-electrical level inverter as claimed in claim 1, it is characterised in that the described first default ON time and second default
ON time is identical.
3. five-electrical level inverter as claimed in claim 1, it is characterised in that the polarity switching is opened including the first bridge arm
Guan Guan, the second bridge arm switching tube, the 3rd bridge arm switching tube and four bridge legs switching tube, positive pole input in the polarity switching
The one end respectively with the first bridge arm switching tube, the 3rd bridge arm switching tube is held to be connected, the first bridge arm switching tube, the 3rd bridge
The one end of the other end of arm switch pipe respectively with the second bridge arm switching tube, four bridge legs switching tube is connected, second bridge
Arm switch pipe, the other end of four bridge legs switching tube are connected with negative input in the polarity switching, the polarity
In change-over circuit a port of output end be arranged between the first bridge arm switching tube, the second bridge arm switching tube, another
Port is arranged between the 3rd bridge arm switching tube, four bridge legs switching tube.
4. five-electrical level inverter as claimed in claim 3, it is characterised in that
If the first bridge arm switching tube conducting, the four bridge legs switching tube conducting, second, third bridge arm switch
Pipe is turned off；
If the second bridge arm switching tube conducting, the 3rd bridge arm switching tube conducting, described first, four bridge legs switch
Pipe is turned off.
5. five-electrical level inverter as claimed in claim 1, it is characterised in that the first capacitance switch pipe and the second electric capacity are opened
Closing pipe includes full-control type IGCT.
6. five-electrical level inverter as claimed in claim 1, it is characterised in that
If the first lever selection switching tube conducting, the second electrical level selecting switch pipe and the 3rd lever selection are switched
Pipe is turned off；
If the second electrical level selecting switch pipe conducting, the first lever selection switching tube and the 3rd lever selection are switched
Pipe is turned off；
If the 3rd lever selection switching tube conducting, the second electrical level selecting switch pipe and the first lever selection are switched
Pipe is turned off.
7. five-electrical level inverter as claimed in claim 1, it is characterised in that according to first capacitance voltage more than described the
The difference of two capacitance voltages is more than predetermined threshold value, turns on second electric capacity, turns off first electric capacity, according to the described first electricity
Hold voltage and be more than predetermined threshold value less than the difference of second capacitance voltage, turn on first electric capacity, turn off second electricity
Hold.
8. five-electrical level inverter as claimed in claim 1, it is characterised in that the control signal modulation of the five-electrical level inverter
Mode includes that carrier wave is laminated modulation, and the modulating wave of the carrier wave stacking modulation includes sine wave.
9. five-electrical level inverter as claimed in claim 8, it is characterised in that the carrier wave of the carrier wave stacking modulation includes first
Carrier wave, the second carrier wave, the 3rd carrier wave and the 4th carrier wave, wherein,
The first carrier, the second carrier wave, the 3rd carrier wave and the 4th carrier wave include triangular wave, and the first carrier, second carry
The amplitude of ripple, the 3rd carrier wave and the 4th carrier wave is identical, frequency is identical, phase is identical；
The first carrier, the second carrier wave and the 3rd carrier wave, the 4th carrier wave are stacked on top of one another in same coordinate system, two neighboring
In the carrier wave, the minimum value of one of carrier wave is the maximum of another carrier wave；
, less than the maximum of the first carrier, the minimum value of the modulating wave is less than the described 4th for the maximum of the modulating wave
The minimum value of carrier wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128511.5A CN106787891B (en) | 2017-03-06 | 2017-03-06 | Five-level inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128511.5A CN106787891B (en) | 2017-03-06 | 2017-03-06 | Five-level inverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106787891A true CN106787891A (en) | 2017-05-31 |
| CN106787891B CN106787891B (en) | 2023-07-07 |
Family
ID=58961360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710128511.5A Active CN106787891B (en) | 2017-03-06 | 2017-03-06 | Five-level inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106787891B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110149065A (en) * | 2019-05-13 | 2019-08-20 | 郑州大学 | A kind of buck switching capacity multi-electrical level inverter and its modulator approach |
| CN113037114A (en) * | 2021-02-25 | 2021-06-25 | 国网福建省电力有限公司电力科学研究院 | Three-phase five-level inverter circuit and working method thereof |
| CN114640265A (en) * | 2022-02-25 | 2022-06-17 | 山东大学 | Multilevel single-phase interphase hybrid topology converter and control method |
| CN116707332A (en) * | 2023-06-09 | 2023-09-05 | 深圳市恒运昌真空技术有限公司 | Inverter and multi-level generation method thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050127853A1 (en) * | 2003-12-12 | 2005-06-16 | Gui-Jia Su | Multi-level dc bus inverter for providing sinusoidal and pwm electrical machine voltages |
| CN101295921A (en) * | 2008-06-05 | 2008-10-29 | 上海交通大学 | Current peak controlling double-trapezoidal wave compensation method of three-power level DC boosting converter |
| EP2270971A1 (en) * | 2009-07-02 | 2011-01-05 | ABB Research Ltd. | Three-stage multilevel DC to AC converter |
| US20130033912A1 (en) * | 2011-08-04 | 2013-02-07 | Wu Chin-Chang | Five-level dc-ac converter |
| CN103199775A (en) * | 2013-03-26 | 2013-07-10 | 上海交通大学 | Five level single round high-power anti-explosion synchronous motor frequency conversion speed regulation system based on integrated gate commutated thyristor (IGCT) |
| CN103326606A (en) * | 2013-06-09 | 2013-09-25 | 浙江大学 | One-phase five-level inverter |
| CN103368416A (en) * | 2013-07-31 | 2013-10-23 | 三峡大学 | Long-distance direct-current feed system of underwater vehicle |
| WO2014200044A1 (en) * | 2013-06-14 | 2014-12-18 | 株式会社村田製作所 | Inverter device |
| WO2015081517A1 (en) * | 2013-12-04 | 2015-06-11 | 阳光电源股份有限公司 | Five level inverter |
| WO2016008382A1 (en) * | 2014-07-15 | 2016-01-21 | 阳光电源股份有限公司 | Single-stage photovoltaic grid-connected inverter and control method and application thereof |
| JP2016208744A (en) * | 2015-04-24 | 2016-12-08 | 株式会社明電舎 | Multilevel power converter |
| CN106385189A (en) * | 2016-10-13 | 2017-02-08 | 华南理工大学 | Two-level cascaded multilevel inverter |
-
2017
- 2017-03-06 CN CN201710128511.5A patent/CN106787891B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050127853A1 (en) * | 2003-12-12 | 2005-06-16 | Gui-Jia Su | Multi-level dc bus inverter for providing sinusoidal and pwm electrical machine voltages |
| CN101295921A (en) * | 2008-06-05 | 2008-10-29 | 上海交通大学 | Current peak controlling double-trapezoidal wave compensation method of three-power level DC boosting converter |
| EP2270971A1 (en) * | 2009-07-02 | 2011-01-05 | ABB Research Ltd. | Three-stage multilevel DC to AC converter |
| US20130033912A1 (en) * | 2011-08-04 | 2013-02-07 | Wu Chin-Chang | Five-level dc-ac converter |
| CN103199775A (en) * | 2013-03-26 | 2013-07-10 | 上海交通大学 | Five level single round high-power anti-explosion synchronous motor frequency conversion speed regulation system based on integrated gate commutated thyristor (IGCT) |
| CN103326606A (en) * | 2013-06-09 | 2013-09-25 | 浙江大学 | One-phase five-level inverter |
| WO2014200044A1 (en) * | 2013-06-14 | 2014-12-18 | 株式会社村田製作所 | Inverter device |
| CN103368416A (en) * | 2013-07-31 | 2013-10-23 | 三峡大学 | Long-distance direct-current feed system of underwater vehicle |
| WO2015081517A1 (en) * | 2013-12-04 | 2015-06-11 | 阳光电源股份有限公司 | Five level inverter |
| WO2016008382A1 (en) * | 2014-07-15 | 2016-01-21 | 阳光电源股份有限公司 | Single-stage photovoltaic grid-connected inverter and control method and application thereof |
| JP2016208744A (en) * | 2015-04-24 | 2016-12-08 | 株式会社明電舎 | Multilevel power converter |
| CN106385189A (en) * | 2016-10-13 | 2017-02-08 | 华南理工大学 | Two-level cascaded multilevel inverter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110149065A (en) * | 2019-05-13 | 2019-08-20 | 郑州大学 | A kind of buck switching capacity multi-electrical level inverter and its modulator approach |
| CN113037114A (en) * | 2021-02-25 | 2021-06-25 | 国网福建省电力有限公司电力科学研究院 | Three-phase five-level inverter circuit and working method thereof |
| CN114640265A (en) * | 2022-02-25 | 2022-06-17 | 山东大学 | Multilevel single-phase interphase hybrid topology converter and control method |
| CN116707332A (en) * | 2023-06-09 | 2023-09-05 | 深圳市恒运昌真空技术有限公司 | Inverter and multi-level generation method thereof |
| CN116707332B (en) * | 2023-06-09 | 2024-02-02 | 深圳市恒运昌真空技术股份有限公司 | Inverter and multi-level generation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106787891B (en) | 2023-07-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109391166A (en) | A kind of translation circuit, control method and power supply unit | |
| CN106787891A (en) | A kind of five-electrical level inverter | |
| CN105119512A (en) | Multilevel inverter and capacitor charging method of application circuit of multilevel inverter | |
| CN105226983B (en) | A kind of more level PWM modulator approaches based on mixed carrier | |
| CN111082680B (en) | Single-phase five-level rectifier based on T-shaped structure | |
| CN104821734B (en) | A kind of submodular circuits for block combiner multi-level converter | |
| CN107517019A (en) | Multi-electrical level inverter hybrid modulation stratgy | |
| CN104660081B (en) | A kind of active clamp dual three-level frequency converter and its loss balancing modulation algorithm | |
| CN107834838A (en) | A kind of non-isolation type Three-phase PFC and its control method | |
| CN104410311B (en) | Discontinuous PWM modulation midpoint balance method of three-level inverter | |
| CN107733272A (en) | Four level three-phase grid-connected inverters and its modulator approach and electricity generation system | |
| CN108599604A (en) | The single-phase seven level inverse conversions electric appliance of one kind and its pwm signal modulator approach | |
| CN109067226A (en) | Five lever boosting type inverters of one kind and its control method | |
| CA2995538A1 (en) | Voltage source converter and control thereof | |
| CN105048842B (en) | A kind of single-phase four electrical level inverters and its application circuit | |
| CN105191091A (en) | Voltage source converter | |
| CN106787859A (en) | Combined three phase single-stage APFC converters and its control device based on full bridge structure | |
| CN107565841A (en) | A kind of clamper cascade frequency multiplication multi-level power converter and its control method | |
| WO2017208639A1 (en) | Bidirectional insulating dc/dc converter and smart network | |
| CN107769216A (en) | A kind of voltage modulated method for the access of weak AC network | |
| CN207638580U (en) | Four level three-phase grid-connected inverters and electricity generation system | |
| CN106208131B (en) | Multilevel Inverters topological structure for new energy access and active distribution network | |
| CN205265554U (en) | Five level inverter unit and application circuit thereof | |
| CN103997249A (en) | Method for controlling distributed power grid-connected inverter | |
| CN116545285A (en) | Hybrid device four-level converter with T-shaped high-frequency structure and SPWM (sinusoidal pulse Width modulation) mixing modulation control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |