CN106208726B - A kind of voltage-type Quasi-Z-Source AC-AC converters - Google Patents
A kind of voltage-type Quasi-Z-Source AC-AC converters Download PDFInfo
- Publication number
- CN106208726B CN106208726B CN201610553128.XA CN201610553128A CN106208726B CN 106208726 B CN106208726 B CN 106208726B CN 201610553128 A CN201610553128 A CN 201610553128A CN 106208726 B CN106208726 B CN 106208726B
- Authority
- CN
- China
- Prior art keywords
- switching tube
- switch pipe
- voltage
- coupling inductance
- converters
- 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.)
- Active
Links
- 230000001808 coupling Effects 0.000 claims abstract description 51
- 238000010168 coupling process Methods 0.000 claims abstract description 51
- 238000005859 coupling reaction Methods 0.000 claims abstract description 51
- 239000003990 capacitor Substances 0.000 claims abstract description 45
- 238000003860 storage Methods 0.000 claims abstract description 30
- 230000000051 modifying Effects 0.000 claims description 7
- 230000000295 complement Effects 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 3
- 230000001360 synchronised Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004087 circulation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000630 rising Effects 0.000 description 2
- 241001237728 Precis Species 0.000 description 1
- 229910020019 S1 Can Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/2932—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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 with automatic control of output voltage, current or power
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
A kind of voltage-type Quasi Z Source AC AC converters, are related to AC-AC Conversion.Equipped with input filter inductance L, coupling inductance, first storage capacitor C1, second storage capacitor C2, first four-quadrant switches S1, second four-quadrant switches S2, third four-quadrant switches S3, output filter capacitor C, first switch pipe S1a, second switch pipe S1b, third switching tube S2a, 4th switching tube S2b, 5th switching tube S3a, 6th switching tube S3b, the body diode D1a of first switch pipe, the body diode D1b of second switch pipe, the body diode D2a of third switching tube, the body diode D2b of 4th switching tube, the body diode D3a of 5th switching tube, the body diode D3b of 6th switching tube.By controlling the duty ratio of power switch tube PWM drive signal, required output voltage can be obtained.Both it can boost, can also be depressured.
Description
Technical field
The present invention relates to AC-AC converter techniques fields, and in particular to a kind of Novel electric die mould Quasi-Z-Source
AC-AC converters.
Background technology
With the development of modern science and technology, production automation degree is continuously improved, the electrical equipment of various complex precises
It is used widely, requirement of these sensibility load to power quality is very high.In the quality problems of many electric energy, voltage
Rapid drawdown (voltage sags) and rising sharply endangers caused by (voltage swells) the most universal, and weight can be caused to industrial production
It is big to influence.Studies have shown that even if the voltage dip of short time/equipment fault and outage may also be led to by rising sharply, it can cause
Huge economic loss and the wasting of resources.
In order to solve the problems, such as voltage dip/rise sharply, one kind being called the series compensation device of dynamic electric voltage recovery device (DVR)
It has been applied that, good dynamic property and very high cost performance make it becomes to administer dynamic electric voltage problem, especially
Most economical, the most effective means for voltage dip/rise sharply.AC-AC converters are widely applied to dynamic electric voltage recovery device (DVR)
In to compensate the rapid drawdown of network voltage/rise sharply.
For AC-AC converters, existing topological structure includes mainly three categories：AC-AC with DC link
Converter (AC/DC-DC/AC Converters), the direct AC-AC converters (AC-AC using high frequency ac link
Converters with high frequency AC link), matrix converter (Matrix Converters).
For the AC-AC converters with DC link, energy is stored in DC form in DC link, DC-
The use of DC converters increases the complexity and cost of system, and power conversion series is more, efficiency is low, and collector ring festival-gathering causes
Electric network pollution.High frequency ac link AC-AC converter circuits topological structure and control is more complicated, and reliability is low.For
For matrix converter, energy is stored with form of communication, and output voltage and input current remain sine, input power because
Number can control, and reliability is high, small volume, but equally also has limitation, as voltage gain is less than 0.866, and change of current control
It is complicated.
There is scholar to propose Z source AC-AC converters (Z-source AC-AC converters), its main feature is that output voltage
Both it can also can be boosted or be depressured with input voltage reverse phase with the same phase of input voltage.But there are still ask as follows
Topic：
(1) not altogether, therefore can not embody output voltage can be same with input voltage for input voltage and output voltage
The characteristics of phase or reverse phase；
(2) there are Commutation Problems when two four-quadrant switches switchings in converter, need additional buffer circuit to ensure safety
The change of current；
(3) when each two-way switch is opened, electric current will be flowed through to be returned by the series connection that two diodes and a switching tube form
Road, i.e., will flow through 3 power devices, and on-state loss is larger；
(4) input current works under discontinuous current mode (DCM), has high THD.There are current spike, devices
With higher current stress.Therefore, power factor and power transmission efficiency are relatively low.
Chinese patent CN104716849A discloses a kind of quasi- source of resistance AC~AC converters of voltage-type, including quasi- source of resistance net
Network, ac power electronic switch S1, ac power electronic switch S2, power supply and load；Wherein, quasi- source of resistance network cycle fills
Electricity and electric discharge, ac power electronic switch S1, ac power electronic switch S2 are operated in HF switch state；The output of the present invention
Voltage can be operated in the ac power electronic switch S1 of HF switch state and accounting for for ac power electronic switch S2 by adjusting
Sky realizes being raised and lowered for output voltage than controlling, and it is small finally to solve current AC~AC converter voltages adjustable range, opens
The problem of common conduct or common-mode shutdown can damage power electronic devices when closing alternate conduction.
Invention content
It is an object of the invention to the above problems in view of the sources Z AC-AC converters, provide for dynamic electric voltage recovery device
(DVR) a kind of voltage-type Quasi-Z-Source AC-AC converters.
The present invention is equipped with input filter inductance L, coupling inductance, the first storage capacitor C1, the second storage capacitor C2, the one or four
Quadrant switches S1, the second four-quadrant switches S2, third four-quadrant switches S3, output filter capacitor C, first switch pipe S1a, second
Switching tube S1b, third switching tube S2a, the 4th switching tube S2b, the 5th switching tube S3a, the 6th switching tube S3b, first switch pipe
Body diode D1a, the body diode D1b of second switch pipe, the body diode D2a of third switching tube, the 4th switching tube body
The body diode D3b of diode D2b, the body diode D3a of the 5th switching tube, the 6th switching tube；
The coupling inductance is equipped with coupling inductance primary L1 and coupling inductance secondary L2；
The input filter inductance L connects with alternating current input power supplying；Third four-quadrant switches S3 and coupling inductance primary L1
With in parallel with the first storage capacitor C1 after the L2 series connection of coupling inductance secondary, one end and the coupling inductance primary of the second storage capacitor C2
The different name end of L1, the Same Name of Ends of coupling inductance secondary L2 are connected, second storage capacitor C2 other ends ground connection；
The emitter of the 5th switching tube S3a is connected with the emitter of the 6th switching tube S3b, the 6th switching tube S3b's
Collector is connected with the one end input filter inductance L, the Same Name of Ends phase of the collector and coupling inductance primary L1 of the 5th switching tube S3a
Even；
The emitter of the first switch pipe S1a is connected with the emitter of second switch pipe S1b, first switch pipe S1a's
Collector is connected with the different name end of coupling inductance secondary L2, the grounded collector of second switch pipe S1b；
The emitter of the third switching tube S2a is connected with the emitter of the 4th switching tube S2b, the 4th switching tube S2b's
Collector is connected with the different name end of coupling inductance secondary L2, the collector of third switching tube S2a and the one end output filter capacitor C
It is connected, output filter capacitor C other ends ground connection；
The different name end of a termination coupling inductance primary L1 of the second storage capacitor C2, the second storage capacitor C2's is another
End ground connection.
The first switch pipe S1a, second switch pipe S1b, third switching tube S2a, the 4th switching tube S2b, the 5th switch
IGBT power switch tubes can be used in pipe S3a, the 6th switching tube S3b.
The first four-quadrant switches S1 can be obtained by first switch pipe S1a, second switch pipe S1b differential concatenations；It is described
Second four-quadrant switches S2 is obtained by third switching tube S2a, the 4th switching tube S2b differential concatenations；The third four-quadrant switches
S3 is obtained by the 5th switching tube S3a, the 6th switching tube S3b differential concatenations.
The first switch pipe S1a, second switch pipe S1b, third switching tube S2a, the 4th switching tube S2b, the 5th switch
Pipe S3a, turning on and off for the 6th switching tube S3b are controlled using pulsewidth modulation (PWM).
The first four-quadrant switches S1 and the second four-quadrant switches S2 works in complementary state, and PWM drive signal is complementary；
Second four-quadrant switches S2 and third four-quadrant switches S3 work in synchronous regime, and PWM drive signal is identical.
The first switch pipe S1a, second switch pipe S1b, third switching tube S2a, the 4th switching tube S2b, the 5th switch
Pipe S3a, the 6th switching tube S3b work in half cycle normal open, half cycle high frequency modulated state in a power frequency period.
When the present invention is worked in mutually boosting (Boost) pattern, as input voltage ViWhen ＞ 0, second switch pipe S1b,
Four switching tube S2b, the 6th switching tube S3b normal opens, first switch pipe S1a and third switching tube S2a, the 5th switching tube S3a high frequencies
It is complementary open-minded；As input voltage ViWhen ＜ 0, first switch pipe S1a, third switching tube S2a, the 5th switching tube S3a normal opens, second
Switching tube S1b and the 4th switching tube S2b, the 6th switching tube S3b high frequency complementations are open-minded.
When the present invention works in reverse phase buck/boost (Buck/Boost) pattern, as input voltage ViWhen ＞ 0, first opens
Close pipe S1a, third switching tube S2a, the 5th switching tube S3a normal opens, second switch pipe S1b and the 4th switching tube S2b, the 6th switch
Pipe S3b high frequency complementations are open-minded；As input voltage ViWhen ＜ 0, second switch pipe S1b, the 4th switching tube S2b, the 6th switching tube S3b
Normal open, first switch pipe S1a and third switching tube S2a, the 5th switching tube S3a high frequency complementations are open-minded.
Assuming that the duty ratio of first switch pipe S1a, second switch pipe S1b are D, AC-input voltage Vi, exchange output
Voltage is Vo, the turn ratio of coupling inductance primary L1 and coupling inductance secondary L2 isThen voltage gain is：
The present invention can regard as " solid-state transformer " of a no-load voltage ratio consecutive variations.By controlling power switch tube PWM drivings
The duty ratio of signal can obtain required output voltage.
The present invention can both boost, and can also be depressured；Output voltage can also and can both be inputted with the same phase of input voltage
Voltage inversion.
As the turn ratio M=1 of coupling inductance primary L1 and coupling inductance secondary L2, there are two types of workspaces for converter tool
Duty ratio is worked as in domainWhen, output voltage and the same phase of input voltage, for boosting (Boost) pattern；Work as duty ratioWhen,
Output voltage and input voltage reverse phase are buck/boost (Buck/Boost) pattern.
It can be seen that compared with prior art, the present invention has the advantages that：
(1) present invention is considered as " solid-state transformer " of a no-load voltage ratio consecutive variations.By controlling power switch tube PWM
The duty ratio of drive signal can obtain required output voltage；
(2) present invention can both boost, and can also be depressured；Output voltage both can be with the same phase of input voltage, can also be with
Input voltage reverse phase；
(3) input voltage of the invention with output voltage altogether, therefore can embody output voltage can with input voltage
The characteristics of with same phase or reverse phase；
(4) input current of the invention works under continuous current mode (CCM), has lower THD, without spike electricity
Stream, device have lower current stress.Power factor and power transmission efficiency are high；
(5) present invention does not need Safe commutation, be not necessarily to additional buffer circuit, avoid be added buffer circuit after bring it is defeated
Go out the wave distortion problem of voltage, and improves the efficiency of converter；
(6) when each four-quadrant switches of the invention conducting, electric current only flows through the series connection of a switching tube and diode
Access, i.e. electric current flow only through two power devices, are effectively reduced compared with electric current in conventional topologies flows through three power devices
On-state loss improves conversion efficiency；
(7) each switching tube of the invention works in that semi-perimeter is logical, half cycle high frequency modulated state in a power frequency period,
Effectively reduce switching loss；
(8) present invention only requires seldom devices, few using the number of discrete component compared with conventional topologies, improve
The reliability of system.
Description of the drawings
Fig. 1 is the main circuit topology figure of the present invention；
Fig. 2, Fig. 3 are the operation mode figure (V in the switch periods of the present inventioni＞ 0, il＞ 0)；
Fig. 4, Fig. 5 are the equivalent circuit diagram in the switch periods of the present invention；
Fig. 6, Fig. 7, Fig. 8 are the drive waveforms figure of the power switch tube of the present invention；
Fig. 9, Figure 10, Figure 11 are the key waveforms figure of the present invention；
Figure 12 is the voltage gain and duty cycle relationship figure (M=1) of the present invention.
In figure respectively label for：L is input filter inductance, and L1 is that coupling inductance is primary, and L2 is that coupling inductance is secondary, and C1 is
First storage capacitor, C2 are the second storage capacitor, and C is output filter capacitor, and S1 is the first four-quadrant switches, and S2 is the second four-quadrant
Limit switch, S3 are third four-quadrant switches, and S1a, S1b, S2a, S2b, S3a, S3b be respectively first, second, third, fourth, the
Five, the 6th switching tube, D1a, D1b, D2a, D2b, D3a, D3b are respectively first, second, third, fourth, the five, the 6th switches
The body diode of pipe, R are load.
ViFor AC-input voltage, VoFor ac output voltage, VchFor chopping voltage, iiFor input current, VGE1、VGE2、
VGE3、VGE4、VGE5、VGE6Respectively first, second, third, fourth, the driving voltage of the five, the 6th switching tubes, V1、V2、V3、
V4、V5、V6Respectively first, second, third, fourth, the drain-source voltage of the five, the 6th switching tubes.
Specific implementation mode
Following embodiment will the invention will be further described in conjunction with attached drawing.
Referring to Fig.1, a kind of main circuit topology figure of Novel electric die mould Quasi-Z-Source AC-AC converters.Including defeated
Enter filter inductance L, a pair of of coupling inductance L1 and L2, the first storage capacitor C1, the second storage capacitor C2, the first four-quadrant switches
S1, the second four-quadrant switches S2, third four-quadrant switches S3, output filter capacitor C.
Input filter inductance L connects with alternating current input power supplying；Third four-quadrant switches S3 and coupling inductance primary L1 and coupling
In parallel with the first storage capacitor C1 after the L2 series connection of conjunction inductance secondary, one end of the second storage capacitor C2 is with coupling inductance primary L1's
Different name end, the Same Name of Ends of secondary L2 are connected, C2 other ends ground connection.
Four-quadrant switches S1, S2, S3 are obtained by two IGBT differential concatenations with body diode, and wherein S1 is by the
One, second switch pipe S1a, S1b differential concatenation obtain, and S2 is obtained by second, third switching tube S2a, S2b differential concatenation, S3 by
Five, the 6th switching tube S3a, S3b differential concatenation obtain, and the body diode of S1a, S1b, S2a, S2b, S3a, S3b are respectively
D1a、D1b、D2a、D2b、D3a、D3b。
The emitter of 5th switching tube S3a is connected with the emitter of the 6th switching tube S3b, the current collection of the 6th switching tube S3b
Pole is connected with the one end input filter inductance L, and the collector of the 5th switching tube S3a is connected with the Same Name of Ends of coupling inductance primary L1.
The emitter of first switch pipe S1a is connected with the emitter of second switch pipe S1b, the current collection of first switch pipe S1a
Pole is connected with the different name end of coupling inductance secondary L2, the grounded collector of second switch pipe S1b.
The emitter of third switching tube S2a is connected with the emitter of the 4th switching tube S2b, the current collection of the 4th switching tube S2b
Pole is connected with the different name end of coupling inductance secondary L2, and the collector of third switching tube S2a is connected with the one end output filter capacitor C,
The output filter capacitor C other ends are grounded.
The different name end of a termination coupling inductance primary L1 of second storage capacitor C2, other end ground connection.
The first switch pipe S1a, second switch pipe S1b, third switching tube S2a, the 4th switching tube S2b, the 5th switch
Pipe S3a, turning on and off for the 6th switching tube S3b are controlled using pulsewidth modulation (PWM), the drive signal of power switch tube
As shown in Fig. 6, Fig. 7, Fig. 8 (T is switch periods, and D is the duty ratio of first, second switching tube S1a, S1b drive signal).In order to
Fig. 6, Fig. 7, drive signal shown in Fig. 8 are generated, is needed to input voltage ViIt is sampled.
The drive signal of first four-quadrant switches S1 is mutual with the drive signal of second, third four-quadrant switches S2, S3 respectively
It mends, the drive signal of second, third four-quadrant switches S2, S3 is identical.First switch pipe S1a, second switch pipe S1b, third are opened
Close that pipe S2a, the 4th switching tube S2b, the 5th switching tube S3a, that the 6th switching tube S3b works in half cycle in a power frequency period is normal
Logical, half cycle high frequency modulated state.
The switching frequency of converter consider power system capacity, switch tube voltage current stress and system effectiveness optimization etc. because
Plain Rational choice.
In conclusion the present invention is using strategy control as follows：
When converter is worked in mutually boosting (Boost) pattern：
Work as ViWhen ＞ 0, second switch pipe S1b, the 4th switching tube S2b, the 6th switching tube S3b normal opens, first switch pipe S1a
It is open-minded with third switching tube S2a, the 5th switching tube S3a high frequency complementations；
Work as ViWhen ＜ 0, first switch pipe S1a, third switching tube S2a, the 5th switching tube S3a normal opens, second switch pipe S1b
It is open-minded with the 4th switching tube S2b, the 6th switching tube S3b high frequency complementations.
When converter works in reverse phase buck/boost (Buck/Boost) pattern：
Work as ViWhen ＞ 0, first switch pipe S1a, third switching tube S2a, the 5th switching tube S3a normal opens, second switch pipe S1b
It is open-minded with the 4th switching tube S2b, the 6th switching tube S3b high frequency complementations；
Work as ViWhen ＜ 0, second switch pipe S1b, the 4th switching tube S2b, the 6th switching tube S3b normal opens, first switch pipe S1a
It is open-minded with third switching tube S2a, the 5th switching tube S3a high frequency complementations.
Fig. 2 is the equivalent circuit diagram in one switch periods of converter, and there are two types of operation modes.Equivalent circuit during DT
As shown in figure 4, the equivalent circuit during (1-D) T is as shown in figure 5, then：
It is that zero can obtain by the average value of inductive drop in a switch periods T：
Vi+Vc1-Vc2=0 (1)
Voltage gain is obtained by (1), (2), (3) formula：
Found out by (4) formula, the present invention is considered as " solid-state transformer " of a no-load voltage ratio consecutive variations.By controlling power
The duty ratio of switching tube PWM drive signal can obtain required output voltage.The present invention can both boost, and can also drop
Pressure；Output voltage both can be with the same phase of input voltage, can also be with input voltage reverse phase.
If the turn ratio of coupling inductance primary L1 and coupling inductance secondary L2Then (4) formula becomes：
Figure 12 is the relation curve of converter voltage gain and duty ratio as M=1.It can be seen from the figure that converter
There are two types of working regions for tool, work as duty ratioWhen, output voltage and the same phase of input voltage, for boosting (Boost) pattern；When
Duty ratioWhen, output voltage and input voltage reverse phase are buck/boost (Buck/Boost) pattern.
According to above-mentioned type of drive, with Vi＞ 0, ilFor when ＞ 0, in a switch periods T, main circuit shown in FIG. 1
There are two types of operation modes：
Mode one：Power switch tube S 1a is open-minded, S2a, S3a shutdown.Circuit operation mode is as shown in Figure 2.
Electric current is from first switch pipe S1a and the second body diode D1b circulations, and equivalent circuit diagram in circuit as shown in figure 4, have
3 circuits.Circuit 1 is by AC power Vi, input filter inductance L, the first storage capacitor C1, first switch pipe S1a, the second body two
Pole pipe D1b is constituted, input filter inductance L linear-chargings, the first energy storage inductor C1 linear discharges.Circuit 2 is by the second storage capacitor
C2, coupling inductance secondary L2, first switch pipe S1a, the second body diode D1b are constituted, the second storage capacitor C2 linear discharges, coupling
Close inductance secondary L2 linear-chargings.Circuit 3 is made of output filter capacitor C and load R, output filter capacitor C linear discharges.
Mode two：Power switch tube S 1a shutdowns, S2a, S3a are open-minded.Circuit operation mode is as shown in Figure 3.
Electric current is from the 6th switching tube S3b and the 5th body diode D3a circulations, through two pole the 4th switching tube S2b and third body
Pipe D2a flow direction load R, equivalent circuit diagram is as shown in figure 4, there is 3 circuits in circuit.Circuit 1 is by alternating current input power supplying Vi, it is defeated
Enter filter inductance L, the 6th switching tube S3b, the 5th body diode D3a, coupling inductance primary L1, the second storage capacitor C2 to constitute,
Input filter inductance L linear discharges, coupling inductance primary L1 linear discharges, the second storage capacitor C2 linear-chargings.Circuit 2 is by
One storage capacitor C1, the 6th switching tube S3b, the 5th body diode D3a, coupling inductance primary L1, coupling inductance secondary L2 are constituted,
First storage capacitor C1 linear-chargings, coupling inductance primary L1, coupling inductance secondary L2 linear discharges.Circuit 3 is inputted by exchange
Power supply Vi, input filter inductance L, the 6th switching tube S3b, the 5th body diode D3a, coupling inductance primary L1, coupling inductance time
Grade L2, the 4th switching tube S2b, third body diode D2a, output filter capacitor C, load R are constituted, and output filter capacitor C is linear
Charging.
The present invention is considered as " solid-state transformer " of a no-load voltage ratio consecutive variations.It is driven by controlling power switch tube PWM
The duty ratio of dynamic signal, can obtain required output voltage.The present invention can both boost, and can also be depressured；Output voltage
Both can be with the same phase of input voltage, it can also be with input voltage reverse phase.
The present invention suitable for dynamic electric voltage recovery device (DVR), with compensate the rapid drawdown (voltage sags) of network voltage/
It rises sharply (voltage swells).
The specific embodiment of the present invention is above are only, but the design concept of the present invention is not limited thereto.
Claims (7)
1. a kind of voltage-type Quasi-Z-Source AC-AC converters, it is characterised in that be equipped with input filter inductance L, coupling electricity
Sense, the first storage capacitor C1, the second storage capacitor C2, output filter capacitor C, first switch pipe S1a, second switch pipe S1b,
The body diode of three switching tube S2a, the 4th switching tube S2b, the 5th switching tube S3a, the 6th switching tube S3b, first switch pipe
D1a, the body diode D1b of second switch pipe, the body diode D2a of third switching tube, the 4th switching tube body diode D2b,
The body diode D3a of 5th switching tube, the body diode D3b of the 6th switching tube；First four-quadrant switches S1 is by first switch pipe
S1a, second switch pipe S1b differential concatenations obtain；Second four-quadrant switches S2 is anti-by third switching tube S2a, the 4th switching tube S2b
It is obtained to series connection；Third four-quadrant switches S3 is obtained by the 5th switching tube S3a, the 6th switching tube S3b differential concatenations；
The coupling inductance includes coupling inductance primary L1 and coupling inductance secondary L2；
The input filter inductance L connects with alternating current input power supplying；Third four-quadrant switches S3 and coupling inductance primary L1 and coupling
In parallel with the first storage capacitor C1 after the L2 series connection of conjunction inductance secondary, one end of the second storage capacitor C2 is with coupling inductance primary L1's
Different name end, the Same Name of Ends of coupling inductance secondary L2 are connected, second storage capacitor C2 other ends ground connection；
The emitter of the 5th switching tube S3a is connected with the emitter of the 6th switching tube S3b, the current collection of the 6th switching tube S3b
Pole is connected with the one end input filter inductance L, and the collector of the 5th switching tube S3a is connected with the Same Name of Ends of coupling inductance primary L1；
The emitter of the first switch pipe S1a is connected with the emitter of second switch pipe S1b, the current collection of first switch pipe S1a
Pole is connected with the different name end of coupling inductance secondary L2, the grounded collector of second switch pipe S1b；
The emitter of the third switching tube S2a is connected with the emitter of the 4th switching tube S2b, the current collection of the 4th switching tube S2b
Pole is connected with the different name end of coupling inductance secondary L2, and the collector of third switching tube S2a is connected with the one end output filter capacitor C,
The output filter capacitor C other ends are grounded；
The different name end of a termination coupling inductance primary L1 of the second storage capacitor C2, another termination of the second storage capacitor C2
Ground.
2. a kind of voltage-type Quasi-Z-Source AC-AC converters as described in claim 1, it is characterised in that described first
Switching tube S1a, second switch pipe S1b, third switching tube S2a, the 4th switching tube S2b, the 5th switching tube S3a, the 6th switching tube
S3b is all made of IGBT power switch tubes.
3. a kind of voltage-type Quasi-Z-Source AC-AC converters as described in claim 1, it is characterised in that described first
Switching tube S1a, second switch pipe S1b, third switching tube S2a, the 4th switching tube S2b, the 5th switching tube S3a, the 6th switching tube
Turning on and off for S3b is controlled using pulsewidth modulation.
4. a kind of voltage-type Quasi-Z-Source AC-AC converters as described in claim 1, it is characterised in that described first
Four-quadrant switches S1 and the second four-quadrant switches S2 works in complementary state, and PWM drive signal is complementary；Second four-quadrant switches S2
Synchronous regime is worked in third four-quadrant switches S3, PWM drive signal is identical.
5. a kind of voltage-type Quasi-Z-Source AC-AC converters as described in claim 1, it is characterised in that described first
Switching tube S1a, second switch pipe S1b, third switching tube S2a, the 4th switching tube S2b, the 5th switching tube S3a, the 6th switching tube
S3b works in half cycle normal open, half cycle high frequency modulated state in a power frequency period.
6. a kind of voltage-type Quasi-Z-Source AC-AC converters as described in claim 1, it is characterised in that work in same
Mutually when boosting (Boost) pattern, as input voltage ViWhen ＞ 0, second switch pipe S1b, the 4th switching tube S2b, the 6th switching tube
S3b normal opens, first switch pipe S1a and third switching tube S2a, the 5th switching tube S3a high frequency complementations are open-minded；As input voltage Vi＜
When 0, first switch pipe S1a, third switching tube S2a, the 5th switching tube S3a normal opens, second switch pipe S1b and the 4th switching tube
S2b, the 6th switching tube S3b high frequency complementations are open-minded.
7. a kind of voltage-type Quasi-Z-Source AC-AC converters as described in claim 1, it is characterised in that work in anti-
When phase buck/boost (Buck/Boost) pattern, as input voltage ViWhen ＞ 0, first switch pipe S1a, third switching tube S2a,
5th switching tube S3a normal opens, second switch pipe S1b and the 4th switching tube S2b, the 6th switching tube S3b high frequency complementations are open-minded；When defeated
Enter voltage ViWhen ＜ 0, second switch pipe S1b, the 4th switching tube S2b, the 6th switching tube S3b normal opens, first switch pipe S1a and
Three switching tube S2a, the 5th switching tube S3a high frequency complementations are open-minded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610553128.XA CN106208726B (en) | 2016-07-14 | 2016-07-14 | A kind of voltage-type Quasi-Z-Source AC-AC converters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610553128.XA CN106208726B (en) | 2016-07-14 | 2016-07-14 | A kind of voltage-type Quasi-Z-Source AC-AC converters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106208726A CN106208726A (en) | 2016-12-07 |
| CN106208726B true CN106208726B (en) | 2018-07-17 |
Family
ID=57474309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610553128.XA Active CN106208726B (en) | 2016-07-14 | 2016-07-14 | A kind of voltage-type Quasi-Z-Source AC-AC converters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106208726B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107896063A (en) * | 2017-10-31 | 2018-04-10 | 湖南大学 | A kind of New single-phase high-frequency isolation Z sources AC AC translation circuits |
| CN109327139A (en) * | 2018-11-13 | 2019-02-12 | 广州金升阳科技有限公司 | A kind of step-up/step-down circuit |
| CN109450258A (en) * | 2018-12-12 | 2019-03-08 | 亚瑞源科技（深圳）有限公司 | A kind of two-way BUCK BOOST route |
| CN113824335A (en) * | 2021-09-18 | 2021-12-21 | 厦门大学 | Single-phase Z-source boosting type variable-frequency AC-AC converter |
| CN114006530A (en) * | 2021-10-26 | 2022-02-01 | 国网电力科学研究院有限公司 | Coupling type quasi Z source direct current converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036397A (en) * | 2012-11-30 | 2013-04-10 | 福州大学 | Single-level single-phase large-step-up-ratio cascade connection voltage type convertor of quasi impedance source |
| CN104205597A (en) * | 2012-05-18 | 2014-12-10 | 富士电机株式会社 | Power conversion device |
| CN104734524A (en) * | 2015-04-09 | 2015-06-24 | 山东科技大学 | Current mode quasi impedance source AC/AC converter |
-
2016
- 2016-07-14 CN CN201610553128.XA patent/CN106208726B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104205597A (en) * | 2012-05-18 | 2014-12-10 | 富士电机株式会社 | Power conversion device |
| CN103036397A (en) * | 2012-11-30 | 2013-04-10 | 福州大学 | Single-level single-phase large-step-up-ratio cascade connection voltage type convertor of quasi impedance source |
| CN104734524A (en) * | 2015-04-09 | 2015-06-24 | 山东科技大学 | Current mode quasi impedance source AC/AC converter |
Non-Patent Citations (3)
| Title |
|---|
| An AC Z-Source Converter Based on Gamma;Mohamad Reza Banaei et al.;《IEEE TRANSACTIONS ON POWER ELECTRONICS》;20160229;第31卷(第2期);第1255-1262页 * |
| Safe-Commutation Strategy for the Novel Family of;Liangzong He et al.;《IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS》;20130831;第9卷(第3期);第1538-1547页 * |
| Single-Phase Quasi-Z-Source AC-AC Converter;Minh-Khai Nguyen et al.;《The 2010 International Power Electronics Conference》;20101231;第562-566页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106208726A (en) | 2016-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106208726B (en) | A kind of voltage-type Quasi-Z-Source AC-AC converters | |
| CN101860192B (en) | Three-state three-level PFC circuit and multi-state three-level PFC circuit | |
| CN110798074B (en) | Cascade type single-phase alternating current-to-direct current isolation converter | |
| CN101958660B (en) | Dual-Sepic buck-boost output parallel combined inverter | |
| CN101944839B (en) | Single-phase five-level power inverter | |
| CN100438303C (en) | Five-level double step-down full bridge inverter | |
| CN105119496A (en) | Wide input range three-level LLC resonant converter and level switching control method | |
| CN111342693B (en) | Boost-buck photovoltaic grid-connected inverter | |
| CN106505894A (en) | A kind of improved three level converter topologies and its modulator approach | |
| CN102510215A (en) | Three-level bidirectional direct-current converter and pulse width control method thereof | |
| CN102082514A (en) | Multi-mode combined AC-AC (alternating current-alternating current) converter based on fly-back converter | |
| CN107134937A (en) | A kind of three level multiple-pulses output transformerless inverter circuit | |
| CN104333247B (en) | Using the cascading multiple electrical level of three-terminal switch network is single-phase and three-phase inverter | |
| CN102324858B (en) | Voltage transforming rectifier with dual functions of voltage stabilization and harmonic injection | |
| CN203827175U (en) | Novel soft switching bi-directional DC-DC converter | |
| CN108599346B (en) | Three-level electric automobile charging circuit | |
| CN201490890U (en) | Converter capable of working in phase-shift resonance and PWM modes | |
| CN113507226A (en) | Three-phase rectifier converter and control method thereof | |
| CN206865369U (en) | Three level multiple-pulses export transformerless inverter circuit | |
| CN102163924B (en) | Current type impedance source AC/AC (alternating current/alternating current) frequency converter and control method of control loop thereof | |
| Esmaeili et al. | A filterless single-phase AC-AC converter based on coupled inductors with safe-commutation strategy and continuous input current | |
| Babaei et al. | A new structure of quasi Z-source-based cascaded multilevel inverter | |
| CN201985767U (en) | Current type impedance source alternating current/alternating current frequency converter | |
| CN202424565U (en) | High-efficiency grid-connected inverter circuit | |
| Broday et al. | Modeling and dynamic feedback linearization of a 5-switch tri-state buck-boost bidirectional DC-DC converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |