CN107196523A - A kind of three level active third-harmonic zero-sequence voltage matrix converters of T-type structure - Google Patents
A kind of three level active third-harmonic zero-sequence voltage matrix converters of T-type structure Download PDFInfo
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- CN107196523A CN107196523A CN201710385252.4A CN201710385252A CN107196523A CN 107196523 A CN107196523 A CN 107196523A CN 201710385252 A CN201710385252 A CN 201710385252A CN 107196523 A CN107196523 A CN 107196523A
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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
- 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
- H02M5/40—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 with intermediate conversion into dc
- H02M5/42—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 with intermediate conversion into dc by static converters
- H02M5/44—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 with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—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 with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—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 with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—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 with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
-
- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- 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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc 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
- H02M7/217—Conversion of ac power input into dc 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
- H02M7/2173—Conversion of ac power input into dc 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 in a biphase or polyphase circuit arrangement
-
- 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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc 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
- H02M7/217—Conversion of ac power input into dc 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
- H02M7/219—Conversion of ac power input into dc 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 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
Abstract
The present invention provides a kind of three level active third-harmonic zero-sequence voltage matrix converters of T-type structure, including：Rectification stage circuit, third-harmonic zero-sequence voltage circuit, inverse cascade circuit and input LC wave filters；The AC rectification that rectification stage circuit is used for the three-phase alternating current input voltage input for providing three-phase alternating-current supply is six pulsed dc voltages；Third-harmonic zero-sequence voltage circuit is used to produce triple-frequency harmonics to the direct current and injects the rectification stage circuit；Inverse cascade circuit is used to the direct current being converted to alternating current；LC wave filters, including filter inductance and filter capacitor are inputted, input LC wave filters are used for the neutral point for filtering and providing inverse cascade in inverse cascade circuit.The present invention both has more preferable control performance, such as expands the control range of input reactive power, does not need synchronous modulation, higher power output quality is provided again, improves output waveform, have the advantages that common mode level is lower and system effectiveness is higher.
Description
Technical field
It is humorous more particularly, to three level active three times based on T-type structure the present invention relates to power converter technical field
The matrix converter of ripple injection.
Background technology
With the fast development of power semiconductor and microcontroller technology, Power Electronic Technique is in the past few decades
It is central to achieve the progress advanced by leaps and bounds.How Power Electronic Technique utilizes power electronic equipment or system realization pair if mainly being studied
Efficient utilization, control and the conversion of electric energy, are electricians to meet energy-saving and new energy development the great demand of energy field
The forward position direction of technical field and study hotspot.Either energy-saving or new energy development, all be unable to do without power electronics skill
Core-power inverter of art.In all power converter constructions, but it is the widest with the application of friendship-friendship power inverter
It is general.Current friendship-friendship power inverter is largely used to the fields such as AC inverter driving system, generation of electricity by new energy and uninterrupted power source.
Matrix converter is widely used in various friendship-alternating currents as the interface circuit of public electric wire net and AC load to be become
Carry over is closed.Although matrix converter has many advantages, such as, such as passive front end converter is due to high conversion efficiency, EMI interference
Small, inexpensive, simple in construction and high reliability, is adopted extensively in the field such as frequency control and renewable energy power generation
With, but to still suffer from energy one-way flow, input current of poor quality for most of matrix converters, power density and reliability are low
Shortcoming.
There is the overtension of main switching device using double level designs in existing third-harmonic zero-sequence voltage matrix converter,
The problem of harmonic wave of output voltage is excessive simultaneously.
The content of the invention
The present invention provides a kind of matrix converter for overcoming above mentioned problem or solving the above problems at least in part.
There is provided a kind of three level active third-harmonic zero-sequence voltage matrixings of T-type structure according to an aspect of the present invention
Device, including：Rectification stage circuit, third-harmonic zero-sequence voltage circuit, inverse cascade circuit and input LC wave filters；
The input of the rectification stage circuit is connected with three-phase input power supply, output end respectively with direct current voltage bus
Positive and negative electrode is connected, and the AC rectification of the three-phase alternating current input voltage input for the three-phase alternating-current supply to be provided is six
Pulsed dc voltage, and it is supplied to third-harmonic zero-sequence voltage circuit and the inverse cascade circuit；
The first end of the third-harmonic zero-sequence voltage circuit is connected with the positive and negative electrode of direct current voltage bus respectively, the second end with
The three-phase alternating-current supply connection, for being electrically generated triple-frequency harmonics to the direct current and injecting the rectification stage circuit；
The first end of the inverse cascade circuit and the positive and negative electrode of direct current voltage bus are connected, and the second end is connected with load, are used
In the direct current is converted into alternating current；
LC wave filters, including filter inductance and filter capacitor are inputted, the filter inductance connects with the three-phase alternating-current supply
Connect, the two ends of the filter capacitor respectively with the second end of the third-harmonic zero-sequence voltage circuit and the inverse cascade circuit first
End connection, the input LC wave filters are used for the neutral point for filtering and providing inverse cascade in inverse cascade circuit.
Preferably, the rectification stage circuit includes
First bridge arm, including bridge arm switch and first time bridge arm switch on first；
Second bridge arm, including bridge arm switch and second time bridge arm switch on second；
3rd bridge arm, including bridge arm switch and the three times bridge arm switches on the 3rd；
Wherein, bridge arm switch on described first, on second on bridge arm switch and the 3rd first pole of bridge arm switch with it is straight
The connection of bus positive pole is flowed, the second pole is opened with first time bridge arm switch, second time bridge arm switch and the three times bridge arms successively
The first pole closed is connected in first node, Section Point and the 3rd node, first time bridge arm switch, second time bridge arm switch
And the second pole of the three times bridge arm switches is connected with dc bus negative pole.
Preferably, the third-harmonic zero-sequence voltage circuit includes：
First two-way switch, the second two-way switch, the 3rd two-way switch, the first inductance and four bridge legs；
Wherein, first two-way switch, the second two-way switch, the 3rd two-way switch the first pole respectively with three-phase input
Power supply is connected in the first node, Section Point and the 3rd node, first two-way switch, the second two-way switch, the 3rd
One end of second pole of two-way switch and first inductance is connected in fourth node, the other end of first inductance with institute
State four bridge legs connection.
Preferably, the four bridge legs include：
First active switch and the second active switch, the first pole of first active switch and the dc bus positive pole
Connection, the second pole of second active switch is connected with the dc bus negative pole, the second pole of first active switch
Extremely it is connected with the first of the second active switch.
Preferably, the inverse cascade circuit includes：5th bridge arm, the 6th bridge arm, the 7th bridge arm and the 4th two-way opened
Pass, the 5th two-way switch and the 6th two-way switch；
Wherein, the 5th bridge arm, including bridge arm switch and the five times bridge arm switches on the 5th；
6th bridge arm, including bridge arm switch and the six times bridge arm switches on the 6th；
7th bridge arm, including bridge arm switch and the seven times bridge arm switches on the 7th；
Bridge arm switch on described 5th, bridge arm switch on the 6th, first pole of bridge arm switch and the direct current are female on the 7th
Line positive pole is connected, the second pole is switched with the five times bridge arms respectively, the six times bridge arm switches, the seven times bridge arms are switched first
Pole is connected in the 5th node, the 6th node and the 7th node；Under the five times bridge arms switch, the six times bridge arm switches and the 7th
Second pole of bridge arm switch is connected with dc bus negative pole；
Three leakages of second pole of the 4th two-way switch, the 5th two-way switch and the 6th two-way switch respectively with load
Sense is connected in the 5th node, the 6th node and the 7th node.
Preferably, the filter capacitor includes：
First filter capacitor, the first pole is connected with dc bus negative pole；
Second filter capacitor, the first order and first two-way switch, the second two-way switch, the second of the 3rd two-way switch
Pole is connected in the fourth node；
First pole of the 3rd filter capacitor is connected with dc bus positive pole；
Second pole of first filter capacitor, the second filter capacitor and the 3rd filter capacitor and the 4th two-way opened
The first order of pass, the 5th two-way switch and the 6th two-way switch is connected in the midpoint of three-level VSI.
Preferably, the filter inductance includes being connected on the first filter inductance on the three-phase input power supply, the respectively
Two filter inductances and the 3rd filter inductance.
The application proposes a kind of three level active third-harmonic zero-sequence voltage matrix converters of T-type structure, can realize power
Two-way flow function, reduces the harmonic current of net side, wherein three level active third-harmonic zero-sequence voltage matrix converters are with structure letter
Based on single and novel direct AC-AC energy converters, using symmetrical circuit structure, rectification stage circuit and inverse cascade circuit
Can independent control, with the good characteristic such as energy two-way transmission, sinusoidal input and output electric current, input power factor be controllable.This hair
It is bright both to have made system that there is more preferable control performance, higher power output quality is provided for system again, improves output waveform, has
The advantage that common mode level is lower and system effectiveness is higher.
Brief description of the drawings
Fig. 1 is the structural representation according to matrix converter of the embodiment of the present invention；
Fig. 2 is the third-harmonic zero-sequence voltage current control schematic diagram according to the embodiment of the present invention；
Fig. 3 is the T-type structure inverter control schematic diagram according to the embodiment of the present invention；
Fig. 4 is the simulation waveform schematic diagram according to the embodiment of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment to the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
In order to overcome energy one-way flow, input current present in prior art of poor quality, power density and reliability
Low shortcoming, and the harmonic wave of double level active third-harmonic zero-sequence voltage matrix converters output voltage while exist excessive are asked
Topic., a kind of three level active third-harmonic zero-sequence voltage matrix converters of T-type structure that matrix converter is present, as shown in figure 1,
Including：Rectification stage circuit, third-harmonic zero-sequence voltage circuit, inverse cascade circuit and input LC wave filters；
The input of the rectification stage circuit is connected with three-phase input power supply, output end respectively with direct current voltage bus
Positive and negative electrode is connected, and the AC rectification of the three-phase alternating current input voltage input for the three-phase alternating-current supply to be provided is six
Pulsed dc voltage, and it is supplied to third-harmonic zero-sequence voltage circuit and the inverse cascade circuit；
The first end of the third-harmonic zero-sequence voltage circuit is connected with the positive and negative electrode of direct current voltage bus respectively, the second end with
The three-phase alternating-current supply connection, for producing triple-frequency harmonics to the direct current and injecting the rectification stage circuit；
The first end of the inverse cascade circuit and the positive and negative electrode of direct current voltage bus are connected, and the second end is connected with load, are used
In the direct current is converted into alternating current；
LC wave filters, including filter inductance and filter capacitor are inputted, the filter inductance connects with the three-phase alternating-current supply
Connect, the two ends of the filter capacitor respectively with the second end of the third-harmonic zero-sequence voltage circuit and the inverse cascade circuit first
End connection, the input LC wave filters are used for the neutral point for providing inverse cascade in inverse cascade circuit.
It should be noted that inverse cascade circuit of the present invention is based on T-shaped topological three-level VSI, compared to
Traditional two-level inverter, does not only reach the purpose of three level of output, improves output switch state, also reduces output electricity
The harmonic content of pressure, so as to further reduce the volume of wave filter.
The application can realize to and fro flow of power function, reduce the harmonic current of net side, wherein three level active three times
Harmonic injection matrix converter is based on direct AC-AC energy converters simple in construction and novel, using symmetrical circuit
Structure, rectification stage circuit and inverse cascade circuit can independent control, with energy two-way transmission, sinusoidal input and output electric current, input
Power factor is controllable to wait good characteristic.The present invention had both made system have more preferable control performance, as expanded input reactive power
Control range, synchronous modulation is not needed, higher power output quality is provided for system again, improve output waveform, with common mode
The advantage that level is lower and system effectiveness is higher.
Specifically, rectification stage circuit includes：
First bridge arm, including bridge arm switchs S on firsta+/Da+With first time bridge arm switch Sa-/Da-；
Second bridge arm, including bridge arm switchs S on secondb+/Db+With second time bridge arm switch Sb-/Db-；
3rd bridge arm, including bridge arm switchs S on the 3rdc+/Dc+With the three times bridge arm switch Sc-/Dc-；
Wherein, upper bridge arm switch Sa+/Da+、Sb+/Db+And Sc+/Dc+The first pole be connected with dc bus positive pole, the second pole
Successively S is switched with lower bridge arma-/Da-、Sb-/Db-And Sc-/DcThe first pole be connected in node a, b and c, lower bridge arm switchs Sa-/Da-、
Sb-/Db-And Sc-/DcThe second pole be connected with dc bus negative pole.
Control method herein is exactly the sector according to where voltage locks phase angle to control the switch on and off of rectifier.
Specifically, third-harmonic zero-sequence voltage circuit includes：First two-way switch Say, the second two-way switch Sby, the 3rd two-way opened
Close Scy, the first inductance LyWith four bridge legs；
Wherein, two-way switch Say、SbyAnd ScyThe first pole be connected in first node a, second with three-phase input power supply respectively
Node b and the 3rd node c, two-way switch Say、SbyAnd ScyThe second pole and inductance LyOne end be connected in node y, inductance Ly's
The other end is connected with four bridge legs；
Four bridge legs include the first active switch Sy+/Dy+With the second active switch Sy-/Dy-, the first active switch Sy+/Dy+
The first pole be connected with dc bus positive pole, the second active switch Sy-/Dy-The second pole be connected with dc bus negative pole, first
Active switch Sy+/Dy+The second pole and the second active switch Sy-/Dy-First extremely be connected.
By controlling active switch Sy+/Dy+And Sy-/Dy-, the electric current of third-harmonic zero-sequence voltage circuit is defined triple-frequency harmonics, and notes
Enter into three-phase input that minimum phase of moment absolute value, two-phase input current meets sinusoidal symmetrical condition automatically in addition,
So as to realize that input and output three-phase current sine is controllable, three-phase PFC purpose is finally reached.
From Kirchhoff's law, the AC inductance electric current being connected with input side residue one is by the other two-phase of input side
Line current determine, that is, flow through the half of the current amplitude very little, only input current amplitude of AC inductance.Meanwhile, three times are humorous
First inductance of ripple injection circuit is AC inductance, because inductance has filter action, the current wave form quality of rectification stage input
Amount can be improved.
Specifically, inverse cascade circuit includes：
5th bridge arm, the 6th bridge arm, the 7th bridge arm and the 4th two-way switch Sro, the 5th two-way switch SsoWith the 6th pair
To switch Sto；
5th bridge arm, including bridge arm switchs S on the 5thr+/Dr+With the five times bridge arm switch Sr-/Dr-；
6th bridge arm, including bridge arm switchs S on the 6ths+/Ds+With the six times bridge arm switch Ss-/Ds-；
7th bridge arm, including bridge arm switchs S on the 7tht+/Dt+With the seven times bridge arm switch St-/Dt-；
Upper bridge arm switchs Sr+/Dr+、Ss+/Ds+And St+/Dt+The first pole be connected with dc bus positive pole, the second pole respectively with
Lower bridge arm switchs Sr-/Dr-、Ss-/Ds-And St-/Dt-The first pole be connected in the 5th node r, the 6th node s and the 7th node t；Under
Bridge arm switchs Sr-/Dr-、Ss-/Ds-And St-/Dt-The second pole be connected with dc bus negative pole.
The switch of same bridge arm can not be simultaneously turned on, and by the alternate conduction of switch, DC energy will convert into alternating current energy
Amount is output to load circuit.
Two-way switch Sro、SsoAnd StoThree leakage inductances of second pole respectively with load be connected in node r, s and t.
io=ir*dro+is*dso+it*dto
Wherein, dro、dsoAnd dtoIt is two-way switch S respectivelyro、SsoAnd StoDutycycle.
It should be noted that the inverse cascade circuit in the present invention, is a kind of T-type structure three-level VSI, will
The two-level inverter of dual stage matrix converter is replaced with neutral-point-clamped type inverter, i.e. the midpoint o and filtered electrical of inverter
Hold CFNeutral point is connected, now, and neutral point flows into the electric current i of inverteroBy three two-way switch (Sro, Sso, Sto) control.
Specifically, input LC wave filters include：Filter capacitor CFWith filter inductance LF.The midpoint o and filter capacitor of inverter
CFNeutral point is connected.
Filter capacitor CFIncluding：
First filter capacitor CFa, the first pole is connected with dc bus negative pole.
Second filter capacitor CFb, the first pole and two-way switch Say、SbyAnd ScyThe second pole be connected in node y.
3rd filter capacitor CFcThe first pole be connected with dc bus positive pole.
Filter capacitor CFa、CFbAnd CFcThe second pole and two-way switch Sro、SsoAnd StoThe first order be connected in node o.
It should be noted that it may be clearly seen that filter capacitor C in Fig. 1FIncluding the electric capacity of left, center, right three, wherein left electricity
Hold for the first filter capacitor CFa, middle electric capacity be the second filter capacitor CFb, right electric capacity be the 3rd filter capacitor CFc, do not have in figure
Body is shown.
Filter inductance LFIncluding：First filter inductance LFa, the second filter capacitor LFbWith the 3rd filter capacitor LFc, go here and there respectively
It is associated in the filter inductance L on three-phase input power supplyFa, filter capacitor LFbWith filter capacitor LFc。
It should be noted that the effect of input LC wave filters is：
First, for filtering out the harmonic wave for the pulse current that rectification stage circuit and inverse cascade circuit are produced, while producing three-phase just
String input current；
2nd, filter capacitor CFSuitable neutral point, i.e. the midpoint o of inverter can be provided to the input of inverse cascade circuit
With filter capacitor CFNeutral point is connected, and constitutes a kind of three level matrix converters based on T-shaped topological structure；
3rd, when any one switch OFF, the leakage inductance L of loadoWith the inductance L of third-harmonic zero-sequence voltage circuityThe energy of storage
Amount can pass through electric capacity CFDischarge, that is, play absorption, so as to inhibit the voltage surge switched off.
Table 1 is the rectification stage circuit of the present invention and the on off state table of third-harmonic zero-sequence voltage circuit.
Table 1
| θsa | Sector | Say | Sby | Scy | Sa+ | Sa- | Sb+ | Sb- | Sc+ | Sc- |
| 0-π/3 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
| π/3-2π/3 | 2 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 |
| 2π/3-π | 3 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 |
| π-4π/3 | 4 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 |
| 4π/3-5π/3 | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 |
| 5π/3-2π | 6 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 |
Input voltage is divided into 6 sectors in time by three-phase input voltage instantaneous value magnitude relationship.Because three-phase is defeated
Enter the symmetry of voltage, by taking sector 1 as an example, three-phase input voltage instantaneous value magnitude relationship is Usa>Usb>Usc, i.e. input voltage Usa
PhaseWhen, in order to ensure the continuity of current path and avoid bridge arm on input side short circuit, rectifier from opening
Close Sa+/Da+S is switched with lower bridge armc-/Dc-Open-minded always, corresponding b two-way switch SbyOpen always to b phases inject three times it is humorous
Ripple electric current, rest switch shut-off.
The switch on and off of rectification stage circuit is controlled according to sector difference, switchs Sa+And Sc-When opening, because b phases do not have
Electric current flows through, i.e. ibEqual to 0, accordingly, it would be desirable to switch SbyConducting, allows iyB phases are compensated, it is ensured that three-phase input is still three-phase
Symmetrically.
By taking sector 1 as an example, as shown in Fig. 2 to triple harmonic current iyControl process be：
When bridge arm and the three times bridge arms are turned on first, Upy=Uab,Uyn=Ubc；Now
Pass through controlling switch Sy+And Sy-To generate the triple harmonic current i of needsy, Sy+And Sy-It can not simultaneously turn on.Need
Want iyDuring increase, then cause Uy=Uab>0, i.e. Sy+Conducting；Work as iyDuring reduction, then cause Uy=-Ubc<0, i.e. Sy-Conducting.Other fans
Area's control method is consistent.
Electric capacity CFA neutral point is provided for inverse cascade circuit, T-shaped three-level structure is realized, reduction loss is reached and saves
The purpose in space.Three level are referred to by three switch Sr+, Sr-And SroA phase bridge arm r ends can be caused to export positive negative zero three
The level of the form of kind.For example, when in sector 1, as shown in figure 3, Upo=Uao, Uon=-Uco, as needed and can now lead to
The voltage crossed needed for three switch outputs of control.As switch Sr+And SroWhen opening, if switch Sr+Dutycycle be d, then switch Sro
Dutycycle is 1-d, now may be such that Uro>0；As switch Sr-And SroWhen opening, as switch Sr-Dutycycle be d when, then switch
SroDutycycle is 1-d, now may be such that Uro<0；When needing UroWhen=0, that is, switch SroIt is open-minded, switch Sr+And Sr-Shut-off.
The present embodiment sets up simulation model under MATLAB/SIMULINK environment.Electric energy transmission is with from rectification stage circuit, three
Subharmonic injection circuit is to exemplified by inverse cascade circuit, and the amplitude of input line voltage is 220V, and frequency is 50Hz, switching frequency
20kHz, filter inductance LFFor 300uH, filtered electrical CFHold for 6.6uF, the leakage inductance L of loadoFor 3mh, third-harmonic zero-sequence voltage circuit
Inductance LyFor 1.2mH, load resistance RLFor 25ohm.
Fig. 4 shows the simulation waveform of the embodiment of the present invention, wherein, when Fig. 4 (a) is that 6 sectors are run, three-phase input voltage
Usa, Usb, Usc, three-phase input current ia, ib, icWith third-harmonic zero-sequence voltage electric current iyWaveform.
Fig. 4 (b) be system enter stable state after, the VD u of third-harmonic zero-sequence voltage circuitpn, upo, uonWith it is defeated
Go out voltage ursAnd output current irWaveform.VD upnFor continuous 6 pulse wave electric voltage, with input line voltage bag
Network characteristic.As can be seen that the voltage x current of output is sinusoidal current from Fig. 4 (b), and keep good continual and steady spy
Property, with higher power output quality.
Finally, the present processes are only preferably embodiment, are not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc. should be included in the protection of the present invention
Within the scope of.
Claims (7)
1. a kind of three level active third-harmonic zero-sequence voltage matrix converters of T-type structure, it is characterised in that including：Rectification stage electricity
Road, third-harmonic zero-sequence voltage circuit, inverse cascade circuit and input LC wave filters；
The input of the rectification stage circuit is connected with three-phase input power supply, and output end is positive and negative with direct current voltage bus respectively
Pole is connected, and the AC rectification of the three-phase alternating current input voltage input for the three-phase alternating-current supply to be provided is straight for six pulses
Voltage is flowed, and is supplied to third-harmonic zero-sequence voltage circuit and the inverse cascade circuit；
The first end of the third-harmonic zero-sequence voltage circuit is connected with the positive and negative electrode of direct current voltage bus respectively, the second end with it is described
Three-phase alternating-current supply is connected, for being electrically generated triple-frequency harmonics to the direct current and injecting the rectification stage circuit；
The first end of the inverse cascade circuit and the positive and negative electrode of direct current voltage bus are connected, and the second end is connected with load, for inciting somebody to action
The direct current is converted to alternating current；
LC wave filters, including filter inductance and filter capacitor are inputted, the filter inductance is connected with the three-phase alternating-current supply, institute
The two ends for stating filter capacitor connect with the second end of the third-harmonic zero-sequence voltage circuit and the first end of the inverse cascade circuit respectively
Connect, the input LC wave filters are used for the neutral point for filtering and providing inverse cascade in inverse cascade circuit.
2. three level active third-harmonic zero-sequence voltage matrix converters of T-type structure as claimed in claim 1, it is characterised in that
The rectification stage circuit includes
First bridge arm, including bridge arm switch and first time bridge arm switch on first；
Second bridge arm, including bridge arm switch and second time bridge arm switch on second；
3rd bridge arm, including bridge arm switch and the three times bridge arm switches on the 3rd；
Wherein, bridge arm switch on described first, the first pole of bridge arm switch and direct current mother on bridge arm switch and the 3rd on second
Line positive pole is connected, what the second pole was switched with first time bridge arm switch, second time bridge arm switch and the three times bridge arms successively
First pole is connected in first node, Section Point and the 3rd node, first time bridge arm switch, second time bridge arm switch and
Second pole of the three times bridge arm switches is connected with dc bus negative pole.
3. three level active third-harmonic zero-sequence voltage matrix converters of T-type structure as claimed in claim 2, it is characterised in that
The third-harmonic zero-sequence voltage circuit includes：
First two-way switch, the second two-way switch, the 3rd two-way switch, the first inductance and four bridge legs；
Wherein, first two-way switch, the second two-way switch, the 3rd two-way switch the first pole respectively with three-phase input power supply
It is connected in the first node, Section Point and the 3rd node, it is first two-way switch, the second two-way switch, the 3rd two-way
Second pole of switch is connected in fourth node, the other end of first inductance and the described 4th with one end of first inductance
Bridge arm is connected.
4. three level active third-harmonic zero-sequence voltage matrix converters of T-type structure as claimed in claim 3, it is characterised in that
The four bridge legs include：
First active switch and the second active switch, the first pole of first active switch connect with the dc bus positive pole
Connect, the second pole of second active switch is connected with the dc bus negative pole, the second pole of first active switch with
The first of second active switch is extremely connected.
5. three level active third-harmonic zero-sequence voltage matrix converters of T-type structure as claimed in claim 4, it is characterised in that
The inverse cascade circuit includes：5th bridge arm, the 6th bridge arm, the 7th bridge arm and the 4th two-way switch, the 5th two-way switch and
6th two-way switch；
Wherein, the 5th bridge arm, including bridge arm switch and the five times bridge arm switches on the 5th；
6th bridge arm, including bridge arm switch and the six times bridge arm switches on the 6th；
7th bridge arm, including bridge arm switch and the seven times bridge arm switches on the 7th；
Bridge arm switch on described 5th, bridge arm switch on the 6th, on the 7th bridge arm switch the first pole with the dc bus just
Pole is connected, the first pole phase that the second pole is switched with the five times bridge arms respectively, the six times bridge arm switches, the seven times bridge arms are switched
It is connected in the 5th node, the 6th node and the 7th node；The five times bridge arms switch, the six times bridge arm switches and the seven times bridge arms
Second pole of switch is connected with dc bus negative pole；
The three leakage inductance phases of second pole of the 4th two-way switch, the 5th two-way switch and the 6th two-way switch respectively with load
It is connected in the 5th node, the 6th node and the 7th node.
6. three level active third-harmonic zero-sequence voltage matrix converters of T-type structure as claimed in claim 1, it is characterised in that
The filter capacitor includes：
First filter capacitor, the first pole is connected with dc bus negative pole；
Second filter capacitor, the first order and first two-way switch, the second two-way switch, the second pole phase of the 3rd two-way switch
It is connected in the fourth node；
First pole of the 3rd filter capacitor is connected with dc bus positive pole；
Second pole of first filter capacitor, the second filter capacitor and the 3rd filter capacitor and the 4th two-way switch, the
The first order of five two-way switch and the 6th two-way switch is connected in the midpoint of three-level VSI.
7. three level active third-harmonic zero-sequence voltage matrix converters of T-type structure as claimed in claim 6, it is characterised in that
The filter inductance includes the first filter inductance, the second filter inductance and the 3rd filter inductance, first filter inductance, second
Filter inductance and the 3rd filter inductance are connected on the three-phase input power supply respectively.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390573A (en) * | 2018-03-14 | 2018-08-10 | 中南大学 | A kind of matrix form electric power electric transformer of active third-harmonic zero-sequence voltage |
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| CN109586585A (en) * | 2017-09-29 | 2019-04-05 | 株洲中车时代电气股份有限公司 | It is a kind of based on three-phase nine switch total power in press wind electric converter |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060175904A1 (en) * | 2005-02-04 | 2006-08-10 | Liebert Corporation | Ups having a dual-use boost converter |
| CN102723889A (en) * | 2012-07-03 | 2012-10-10 | 华为技术有限公司 | Inverter and pulse width modulation (PWM) method thereof |
| CN106208735A (en) * | 2016-08-24 | 2016-12-07 | 中南大学 | The matrix converter of a kind of third-harmonic zero-sequence voltage and control method |
-
2017
- 2017-05-26 CN CN201710385252.4A patent/CN107196523B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060175904A1 (en) * | 2005-02-04 | 2006-08-10 | Liebert Corporation | Ups having a dual-use boost converter |
| CN102723889A (en) * | 2012-07-03 | 2012-10-10 | 华为技术有限公司 | Inverter and pulse width modulation (PWM) method thereof |
| CN106208735A (en) * | 2016-08-24 | 2016-12-07 | 中南大学 | The matrix converter of a kind of third-harmonic zero-sequence voltage and control method |
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|---|---|---|---|---|
| CN109586585A (en) * | 2017-09-29 | 2019-04-05 | 株洲中车时代电气股份有限公司 | It is a kind of based on three-phase nine switch total power in press wind electric converter |
| CN109586585B (en) * | 2017-09-29 | 2020-06-05 | 株洲中车时代电气股份有限公司 | Full-power medium-voltage wind power converter based on three-phase nine-switch |
| CN108390573A (en) * | 2018-03-14 | 2018-08-10 | 中南大学 | A kind of matrix form electric power electric transformer of active third-harmonic zero-sequence voltage |
| CN108919016A (en) * | 2018-09-13 | 2018-11-30 | 广东电网有限责任公司 | A kind of voltage dip generator and voltage dip pilot system |
| CN110228392A (en) * | 2019-06-20 | 2019-09-13 | 哈尔滨理工大学 | A kind of New-type charge system for electric car |
| TWI734181B (en) * | 2019-08-28 | 2021-07-21 | 台達電子工業股份有限公司 | Indirect matrix converter and rectifier module |
| US11539304B2 (en) | 2019-08-28 | 2022-12-27 | Delta Electronics, Inc. | Indirect matrix converter and rectifier module |
| CN111146955A (en) * | 2020-01-21 | 2020-05-12 | 中南大学 | T-shaped three-level indirect matrix converter topological structure |
| CN111293893A (en) * | 2020-02-26 | 2020-06-16 | 湖南人文科技学院 | Three-phase modular isolation matrix converter topological structure |
| CN112003466B (en) * | 2020-07-21 | 2021-12-17 | 西安理工大学 | Three-phase APFC rectifier capable of realizing voltage boosting and reducing and working method thereof |
| CN112003466A (en) * | 2020-07-21 | 2020-11-27 | 西安理工大学 | Three-phase APFC rectifier capable of realizing voltage boosting and reducing and working method thereof |
| CN114744869A (en) * | 2022-04-14 | 2022-07-12 | 电子科技大学 | Three-level step-down DC converter |
| CN114744869B (en) * | 2022-04-14 | 2023-03-28 | 电子科技大学 | Three-level step-down direct current converter |
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