CN104935196B - The space vector modulating method that dual three-level inverter system residual voltage eliminates - Google Patents
The space vector modulating method that dual three-level inverter system residual voltage eliminates Download PDFInfo
- Publication number
- CN104935196B CN104935196B CN201510390570.0A CN201510390570A CN104935196B CN 104935196 B CN104935196 B CN 104935196B CN 201510390570 A CN201510390570 A CN 201510390570A CN 104935196 B CN104935196 B CN 104935196B
- Authority
- CN
- China
- Prior art keywords
- mrow
- level
- vector
- msub
- mtd
- 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.)
- Expired - Fee Related
Links
- 239000013598 vector Substances 0.000 title claims abstract description 100
- 230000009977 dual effect Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000008030 elimination Effects 0.000 claims abstract description 11
- 238000003379 elimination reaction Methods 0.000 claims abstract description 11
- 230000003068 static effect Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 3
- 238000000638 solvent extraction Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Inverter Devices (AREA)
Abstract
The space vector modulating method that a kind of dual three-level inverter system residual voltage eliminates, belongs to inverter system space vector modulating method.Adjusting the action time of zero vector in each switch periods makes the average residual voltage of dual three-level inverter system be 0, utilize unified fast algorithm and space voltage vector decoupling, reference voltage vector is decomposed into two equal in magnitude, direction 60 ° of equivalent reference voltage vector, and the amplitude of two equivalent reference voltage vectors is the amplitude of reference voltage vector each otherTimes, and individually produced by two diode-clamped three-level inverters, realize the elimination of the instantaneous value to dual three-level inverter system residual voltage.Method And Principle is simple, it is clear in structure, utilize unified fast algorithm and space voltage vector decoupling, two in dual three-level inverter system three-level inverters are made to be operated in the powering mode of single direct voltage source, effectively simplify topological structure and reduce cost, realize the four quadrant running for driving winding asynchronous motor.
Description
Technical field
The present invention relates to a kind of inverter system space vector modulating method, particularly a kind of dual three-level inverter system
The space vector modulating method that residual voltage eliminates.
Background technology
In recent years, the harmonic wave of output voltage content of multi-electrical level inverter is low, small to the switch stress of semiconductor devices,
The powerful occasion of middle high-pressure has obtained more and more extensive application.With diode clamp bit-type, striding capacitance type, H bridge cascade connection types
Inverter is compared, can be to due to opening winding asynchronous motor both-end cascade type DC-to-AC converter in the case where switching device quantity is equal
Load provides more level numbers, less output voltage, current harmonics is produced, so that it is in multi-electrical level inverter field
It is more prominent with the application potential of transmission field.But this inverter topology is caused by the power supply of single direct voltage source
Residual voltage problem is still the focus of numerous scholar's research, wherein especially using the research of double two level and dual three-level inverter as
It is main.For the problem, there are the method much eliminated on double two level and dual three-level inverter residual voltage and modulation strategy
It is suggested.
When driving winding asynchronous motor dual three-level inverter and being operated in single direct voltage source powering mode, internal system
Loop can be formed, now system can produce very big zero-sequence current in the presence of residual voltage, so as to form internal system
Circulation, makes the harmonic content of electric machine phase current increase, and the insulation of winding electric machine is opened in infringement, so as to influence the normal operation of equipment,
So need to suppress the residual voltage of system, it is ensured that system is operated in good running status.It is existing electric to double three
The removing method of flat inverter system residual voltage mainly has following three kinds：(1) two three are given using independent direct voltage source
Electrical level inverter is powered, and system residual voltage is not become loop in internal system, so as to can not produce zero-sequence current；(2)
Using the methods of 180 ° of decouplings of unified fast algorithm and space voltage vector, by adjusting the action time of zero vector, make its
Residual voltage average value caused by each inverter is zero in each switch periods；(3) when dual three-level inverter is operated in list
During one direct current voltage fed pattern, to load three-phase phase voltage sum in each switch periods using the method for staggeredly clamper
Interior average value is zero.
Knowable to being analyzed the above control method, the independent direct current voltage source that method (1) uses gives two three
Electrical level inverter is powered, although now the residual voltage of system is not zero, very big residual voltage in system be present, due to
The direct voltage source of two inverters is isolated, and internal system does not form loop, so now the zero-sequence current of system is 0,
Operation on system can increase the equipment cost of system without influence, but this method, and be difficult to the four quadrant running of motor；
Method (2) and method (3) are to enter Mobile state elimination to the residual voltage of dual three-level inverter system from average, inverse
The amplitude of the residual voltage become in device system is still very high.
The content of the invention
The space vector modulation eliminated the invention aims to provide a kind of dual three-level inverter system residual voltage
Method, realize the elimination of the instantaneous value to dual three-level inverter system residual voltage.
The object of the present invention is achieved like this：The space vector modulating method is that reference voltage vector is decomposed into two
Individual equal in magnitude, direction 60 ° of equivalent reference voltage vector, and the amplitude of the two equivalent reference voltage vectors is reference each other
The amplitude of voltage vectorTimes, individually produced by two diode-clamped three-level inverters, then utilize system
Two corresponding level components of the two equivalent reference voltage vectors are converted into respective three-phase bridge arm by one fast algorithm
Imagination switch switching instant and obtain corresponding effective acting time, and then obtain two two level components in space voltage
The actual switch switching instant of three-phase bridge arm under Vector Modulation, finally the on off state of the two two level resolutes is carried out
Uncorrecting obtains the on off state of corresponding two equivalent reference voltage vectors, completes the modulation of dual three-level inverter, realizes
Effective elimination of dual three-level inverter system residual voltage.
Implementing step is：
Step 1：By reference voltage vector UrefIt is decomposed into that two equal in magnitude, direction 60 ° of equivalent reference voltage each other
Vector Uref1And Uref2, and
Step 2：By two equivalent reference voltage vector Uref1And Uref2α axis components Urefα1、Urefα2And beta -axis component
Urefβ1、Urefβ2The three-phase component U in three-phase static coordinate system abc is obtained using the matrixing of following formularefa1、Urefb1、Urefc1
And Urefa2、Urefb2、Urefc2：
Wherein, x ∈ (1,2)；
Step 3：Two equivalent reference voltage vector U are determined according to following tableref1And Uref2Place 3 level space vector figure
In sector：
| Sector S | Criterion |
| 1 | Urefax>0&Urefbx<0&Urefcx<0 |
| 2 | Urefax>0&Urefbx>0&Urefcx<0 |
| 3 | Urefax<0&Urefbx>0&Urefcx<0 |
| 4 | Urefax<0&Urefbx>0&Urefcx>0 |
| 5 | Urefax<0&Urefbx<0&Urefcx>0 |
| 6 | Urefax>0&Urefbx<0&Urefcx>0 |
Wherein, x ∈ (1,2)；
Step 4：According to the two equivalent reference voltage vector Uref1And Uref2The center vector U of place sectorbase1With
Ubase2, by the two equivalent reference voltage vector Uref1And Uref2It is modified to decompose and obtains each corresponding center vector
Ubase1、Ubase2With two level resolute U ＇ref1, U ＇ref2, and the center corresponding to different sectors in 3 level space vector figure
The three-phase component value of vector is different, shown in table specific as follows：
| Sector S | Ubaseax | Ubasebx | Ubasecx |
| 1 | Udc/6 | ﹣ Udc/12 | ﹣ Udc/12 |
| 2 | Udc/12 | Udc/12 | ﹣ Udc/6 |
| 3 | ﹣ Udc/12 | Udc/6 | ﹣ Udc/12 |
| 4 | ﹣ Udc/6 | Udc/12 | Udc/12 |
| 5 | ﹣ Udc/12 | Udc/6 | ﹣ Udc/12 |
| 6 | Udc/12 | ﹣ Udc/6 | Udc/12 |
Wherein, x ∈ (1,2), UdcRepresent 2 times of three-level inverter DC voltage；
Step 5：Two level resolute U ＇ are can obtain using following formularef1, U ＇ref2In three-phase static coordinate system abc each
The value U ＇ of corresponding three-phaserefax, U ＇refbx, U ＇refcx：
U′refx=Urefx-Ubasex
Urefx=[Urefax Urefbx Urefcx]T
U′refx=[U 'refax U′refbx U′refcx]T
Ubasex=[Ubaseax Ubasebx Ubasecx]T
U′refax=Urefax-Ubaseax
U′refbx=Urefbx-Ubasebx
U′refcx=Urefcx-Ubasecx
Wherein, x ∈ (1,2)；
Step 6：Using unified fast algorithm, by two two level resolute U ＇ref1, U ＇ref2Three-phase value pass through under
The imagination switch switching instant T of the three-phase bridge arm of two each corresponding level resolutes is can obtain after formula processingas1、Tbs1、Tcs1
And Tas2、Tbs2、Tcs2：
Tmaxq=max (Tasq,Tbsq,Tcsq)
Tminq=min (Tasq,Tbsq,Tcsq)
Teffq=Tmaxq-Tminq
Wherein, p ∈ (a, b, c), q ∈ (1,2), TmaxAnd TminIn the imagination switch switching instant for representing three-phase bridge arm respectively
Maximum and minimum value, TeffFor effective acting time, so-called effective acting time is inverter in a switch periods Ts
The output level number asynchronous period of interior three-phase bridge arm, because only that when the three-phase bridge arm output level number of inverter is different
When, inverter could power output；
Step 7：Two two level resolute U ＇ are can obtain using following formularef1, U ＇ref2Under space voltage vector modulation
The actual switch switching instant T of three-phase bridge armga1、Tgb1、Tgc1And Tga2、Tgb2、Tgc2：
Tgxy=Txsy+Toffsety
T0y=Ts/2-Teffy
Wherein, TxsyRepresent the imagination switch switching instant of inverter three-phase bridge arm, TeffyRepresent the effective time of inverter
Section, TminyRepresent the minimum value of the imagination switch switching instant of inverter three-phase bridge arm, TgxyRepresent the reality of inverter three-phase bridge arm
Border switchs switching instant, ToffsetyRepresent shift time, and x ∈ (a, b, c), y ∈ (1,2)；
Step 8：The on off state of the two two level resolutes obtained by step 7, it only has two kinds of (0,1), if
Two diode-clamped three-level inverter work are driven just to need to being fanned where revised two two level resolutes
The on off state in area carries out uncorrecting, i.e. one group of on off state plus place sector zone center vector；According to step 2 and
The sector partitioning method of step 3, the on off state of center vector is as shown in the table corresponding to 1~6 sector：
| Sector S | Center vector on off state |
| 1 | 100 |
| 2 | 110 |
| 3 | 010 |
| 4 | 011 |
| 5 | 001 |
| 6 | 101 |
Wherein, 0,1,2 three-level inverter is represented respectively per phase n, o, p output level, the different fans listed using upper table
The on off state can of center vector corresponding to area completes uncorrecting to the on off state of two all two level resolutes
Process；
Step 9：The on off state obtained according to step 8, calculate the first inverter in dual three-level inverter and the
The dutycycle of the switching signal of each road power switch pipe of two inverters；
Step 10：The timer 1 of allocating digital signal processor, for producing the triangle carrier signal of 5kHz high frequencies；
Step 11：The switching signal dutycycle that the three-level inverter Zhong Ge roads power tube obtained according to step 9 switchs
Calculate and update the value of comparand register in digital signal processor, so as to digital signal processor task manager A and
Produce 12 tunnel pulses in task manager B, recycle field programmable gate array to from 12 tunnels that digital signal processor is sent
Pulse is negated, and is obtained 24 tunnel pulsed drive, two diode-clamped three-level inverter work, is completed to dual three-level
The space vector modulation process of inverter, realizes the elimination to dual three-level inverter system residual voltage.
Beneficial effect, as a result of such scheme, without the action time by adjusting zero vector in each inverter
It is zero to make its each residual voltage average value caused by inverter in each switch periods, without to being in each switch periods
The residual voltage of system enters Mobile state suppression, is sweared reference voltage using the method for unified fast algorithm and space voltage vector decoupling
Amount is decomposed into that two equal in magnitude, direction 60 ° of equivalent reference vector, and individually being produced by two inverters each other, can
Simply, the effective elimination realized to the instantaneous value of dual three-level inverter system residual voltage.
Advantage：Method And Principle is simple, clear in structure, need to only utilize the original of unified fast algorithm and space voltage vector decoupling
Reason and method can make two three-level inverters in dual three-level inverter system be operated in the confession of single direct voltage source
Power mode, effectively simplify topological structure and reduce cost, it is easy to accomplish open the four quadrant running of winding asynchronous motor.
Brief description of the drawings
Fig. 1 is that a kind of new space vector modulation eliminated based on dual three-level inverter system residual voltage of the present invention is calculated
Method flow chart.
Fig. 2 is the main topological diagram of dual three-level inverter in common DC bus structure of the present invention.
Fig. 3 is 60 ° of space voltage vector decoupling principle figures of dual three-level inverter of the present invention.
Fig. 4 is the distribution of three-level inverter space voltage vector and the corresponding sector division figure of the present invention.
Fig. 5 is the U of the present inventionref1Three-phase reference signal instantaneous value corresponding to switching pulse and effective switch time relation
Schematic diagram.
Fig. 6 is the U of the present inventionref1Switching pulse corresponding to three-phase reference signal instantaneous value during in 2 sector and effectively
Switch time graph of a relation.
Fig. 7 is the U of the present inventionref2Switching pulse corresponding to three-phase reference signal instantaneous value during in 4 sector and effectively
Switch time graph of a relation.
Fig. 8 is the modulation degree m of the present inventionaElectric machine phase current and phase voltage experiment ripple when=0.9 under difference powering mode
Shape figure.
Fig. 9 is the modulation degree m of the present inventionaElectric machine phase current and phase voltage experiment ripple when=0.5 under difference powering mode
Shape figure.
The modulation degree that Figure 10 is the present invention is respectively ma=0.9 and maWhen=0.5 under independent direct current voltage fed pattern
Dual three-level inverter system residual voltage test waveform figure.
Embodiment
Institute's embodiment of the present invention is described further below in conjunction with accompanying drawing 1, one kind described in present embodiment is new
The space vector modulating method effectively eliminated to dual three-level inverter system residual voltage, be to be sweared for 60 ° of spaces
Decoupled Model is measured, this method is：Reference voltage vector is decomposed into two equal in magnitude, direction 60 ° equivalent each other first
Reference voltage vector, and the amplitude of the two equivalent reference voltage vectors is reference voltage vector amplitudeTimes, and by two
Individual diode-clamped three-level inverter individually produces, then using unified fast algorithm that the two are equivalent with reference to electricity
Two corresponding level components of pressure vector are converted into the imagination switch switching instant of respective three-phase bridge arm and obtain phase
The effective acting time answered, and then obtain the reality of three-phase bridge arm of the two two level components under space voltage vector modulation
Switching instant is switched, the finally on off state progress uncorrecting to the two two level resolutes obtains corresponding two equivalent ginsengs
The on off state of voltage vector is examined, completes the modulated process to dual three-level inverter, is realized to dual three-level inverter system
Effective elimination of residual voltage.
This method is realized by digital signal processor and field programmable gate array, specifically includes following steps：
Step 1：By reference voltage vector UrefIt is decomposed into that two equal in magnitude, direction 60 ° of equivalent reference voltage each other
Vector Uref1And Uref2, and
Step 2：By two equivalent reference voltage vector Uref1And Uref2α axis components Urefα1、Urefα2And beta -axis component
Urefβ1、Urefβ2The three-phase component U in three-phase static coordinate system abc is obtained using the matrixing of following formularefa1、Urefb1、Urefc1
And Urefa2、Urefb2、Urefc2：
Wherein, x ∈ (1,2)；
Step 3：Two equivalent reference voltage vector U are judged according to following tableref1And Uref2Place 3 level space vector figure
In sector：
| Sector S | Criterion |
| 1 | Urefax>0&Urefbx<0&Urefcx<0 |
| 2 | Urefax>0&Urefbx>0&Urefcx<0 |
| 3 | Urefax<0&Urefbx>0&Urefcx<0 |
| 4 | Urefax<0&Urefbx>0&Urefcx>0 |
| 5 | Urefax<0&Urefbx<0&Urefcx>0 |
| 6 | Urefax>0&Urefbx<0&Urefcx>0 |
Wherein, x ∈ (1,2)；
Step 4：According to the two equivalent reference voltage vector Uref1And Uref2The center vector U of place sectorbase1With
Ubase2, by the two equivalent reference voltage vector Uref1And Uref2It is modified to decompose and obtains each corresponding center vector
Ubase1、Ubase2With two level resolute U ＇ref1, U ＇ref2, and the center corresponding to different sectors in 3 level space vector figure
The three-phase component value of vector is different, shown in table specific as follows：
| Sector S | Ubaseax | Ubasebx | Ubasecx |
| 1 | Udc/6 | ﹣ Udc/12 | ﹣ Udc/12 |
| 2 | Udc/12 | Udc/12 | ﹣ Udc/6 |
| 3 | ﹣ Udc/12 | Udc/6 | ﹣ Udc/12 |
| 4 | ﹣ Udc/6 | Udc/12 | Udc/12 |
| 5 | ﹣ Udc/12 | Udc/6 | ﹣ Udc/12 |
| 6 | Udc/12 | ﹣ Udc/6 | Udc/12 |
Wherein, x ∈ (1,2), UdcRepresent 2 times of three-level inverter DC voltage；
Step 5：Two level resolute U ＇ are can obtain using following formularef1, U ＇ref2In three-phase static coordinate system abc each
The value U ＇ of corresponding three-phaserefax, U ＇refbx, U ＇refcx：
U′refx=Urefx-Ubasex
Urefx=[Urefax Urefbx Urefcx]T
U′refx=[U 'refax U′refbx U′refcx]T
Ubasex=[Ubaseax Ubasebx Ubasecx]T
U′refax=Urefax-Ubaseax
U′refbx=Urefbx-Ubasebx
U′refcx=Urefcx-Ubasecx
Wherein, x ∈ (1,2)；
Step 6：Using unified fast algorithm, by two two level resolute U ＇ref1, U ＇ref2Three-phase value pass through under
The imagination switch switching instant T of the three-phase bridge arm of two each corresponding level resolutes is can obtain after formula processingas1、Tbs1、Tcs1
And Tas2、Tbs2、Tcs2：
Tmaxq=max (Tasq,Tbsq,Tcsq)
Tminq=min (Tasq,Tbsq,Tcsq)
Teffq=Tmaxq-Tminq
Wherein, p ∈ (a, b, c), q ∈ (1,2), TmaxAnd TminIn the imagination switch switching instant for representing three-phase bridge arm respectively
Maximum and minimum value, TeffFor effective acting time, so-called effective acting time, refer to inverter a switch week
Phase TsThe output level number asynchronous period of interior three-phase bridge arm, because only that when the three-phase bridge arm output level number of inverter
When different, inverter could power output；
Step 7：Two two level resolute U ＇ are can obtain using following formularef1, U ＇ref2Under space voltage vector modulation
The actual switch switching instant T of three-phase bridge armga1、Tgb1、Tgc1And Tga2、Tgb2、Tgc2：
Tgxy=Txsy+Toffsety
T0y=Ts/2-Teffy
Wherein, TxsyRepresent the imagination switch switching instant of inverter three-phase bridge arm, TeffyRepresent the effective time of inverter
Section, TminyRepresent the minimum value of the imagination switch switching instant of inverter three-phase bridge arm, TgxyRepresent the reality of inverter three-phase bridge arm
Border switchs switching instant, ToffsetyRepresent shift time, and x ∈ (a, b, c), y ∈ (1,2)；
Step 8：The on off state of the two two level resolutes obtained by step 7, it only has two kinds of (0,1), if
Two diode-clamped three-level inverter work are driven just to need to being fanned where revised two two level resolutes
The on off state in area carries out uncorrecting, i.e. one group of on off state plus place sector zone center vector；According to step 2 and
The sector partitioning method of step 3, the on off state of center vector is as shown in the table corresponding to 1~6 sector：
| Sector S | Center vector on off state |
| 1 | 100 |
| 2 | 110 |
| 3 | 010 |
| 4 | 011 |
| 5 | 001 |
| 6 | 101 |
Wherein, 0,1,2 three-level inverter is represented respectively per phase n, o, p output level, the different fans listed using upper table
The on off state can of center vector corresponding to area completes uncorrecting to the on off state of two all two level resolutes
Process；
Step 9：The on off state obtained according to step 8, calculate inverter 1 and inverter in dual three-level inverter
The dutycycle of the switching signal of 2 each road power switch pipe；
Step 10：The timer 1 of allocating digital signal processor, for producing the triangle carrier signal of 5kHz high frequencies；
Step 11：The switching signal dutycycle that the three-level inverter Zhong Ge roads power tube obtained according to step 9 switchs
Calculate and update the value of comparand register in digital signal processor, so as to digital signal processor task manager A and
Produce 12 tunnel pulses in task manager B, recycle field programmable gate array to from 12 tunnels that digital signal processor is sent
Pulse is negated, and is obtained 24 tunnel pulsed drive, two diode-clamped three-level inverter work, is completed to dual three-level
The space vector modulation process of inverter, realizes the elimination to dual three-level inverter system residual voltage.
Wherein, be checking algorithm described herein to the eradicating efficacy of dual three-level inverter system residual voltage, especially take
Experimental Hardware platform is built to be studied, and winding asynchronous motor is controlled out using the control mode of constant voltage and frequency ratio (V/F)
Operation.From experimental result, modulation algorithm control dual three-level inverter system operation is decoupled using 60 ° of space voltage vectors
When, when system is operated in high modulation region, the phase voltage of motor is five level, and system is operated in electric during low-key system region
The phase voltage of machine is three level, and output waveform of the electric machine phase current under high and low modulation degree is good, the residual voltage of system
Instantaneous value be essentially 0, therefore, the modulation strategy simply, can be realized effectively to dual three-level inverter system residual voltage
The elimination of instantaneous value.
Claims (1)
1. the space vector modulating method that a kind of dual three-level inverter system residual voltage eliminates, the space vector modulating method
For, reference voltage vector is decomposed into two equal in magnitude, direction 60 ° of equivalent reference voltage vector each other, and the two etc.
The amplitude for imitating reference voltage vector is the amplitude of reference voltage vectorTimes, by two diode clamp bit-type tri-level inversions
Device individually produces, and then utilizes unified fast algorithm by two corresponding level components of the two equivalent reference voltage vectors
It is converted into the imagination switch switching instant of respective three-phase bridge arm and obtains corresponding effective acting time, and then obtains
The actual switch switching instant of three-phase bridge arm of two two level components under space voltage vector modulation, finally to the two two
The on off state of level resolute carries out uncorrecting and obtains the on off state of corresponding two equivalent reference voltage vectors, completes double
The modulation of three-level inverter, realize effective elimination of dual three-level inverter system residual voltage；
It is characterized in that：That realizes concretely comprises the following steps：
Step 1：By reference voltage vector UrefIt is decomposed into that two equal in magnitude, direction 60 ° of equivalent reference voltage vector each other
Uref1And Uref2, and
Step 2：By two equivalent reference voltage vector Uref1And Uref2α axis components Urefα1、Urefα2With beta -axis component Urefβ1、
Urefβ2The three-phase component U in three-phase static coordinate system abc is obtained using the matrixing of following formularefa1、Urefb1、Urefc1With
Urefa2、Urefb2、Urefc2：
<mrow>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>U</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
<mi>a</mi>
<mi>x</mi>
</mrow>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>U</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
<mi>b</mi>
<mi>x</mi>
</mrow>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>U</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
<mi>c</mi>
<mi>x</mi>
</mrow>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>=</mo>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<mn>1</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<mo>-</mo>
<mfrac>
<mn>1</mn>
<mn>2</mn>
</mfrac>
</mrow>
</mtd>
<mtd>
<mfrac>
<msqrt>
<mn>3</mn>
</msqrt>
<mn>2</mn>
</mfrac>
</mtd>
</mtr>
<mtr>
<mtd>
<mfrac>
<mn>1</mn>
<mn>2</mn>
</mfrac>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<mfrac>
<msqrt>
<mn>3</mn>
</msqrt>
<mn>2</mn>
</mfrac>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>U</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
<mi>&alpha;</mi>
<mi>x</mi>
</mrow>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>U</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
<mi>&beta;</mi>
<mi>x</mi>
</mrow>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
</mrow>
Wherein, x ∈ (1,2)；
Step 3：Two equivalent reference voltage vector U are judged according to following tableref1And Uref2In the 3 level space vector figure of place
Sector：
Wherein, x ∈ (1,2)；
Step 4：According to the two equivalent reference voltage vector Uref1And Uref2The center vector U of place sectorbase1And Ubase2,
By the two equivalent reference voltage vector Uref1And Uref2It is modified to decompose and obtains each corresponding center vector Ubase1、
Ubase2With two level resolute U ＇ref1, U ＇ref2, and the center vector corresponding to different sectors in 3 level space vector figure
Three-phase component value be different, shown in table specific as follows：
Wherein, x ∈ (1,2), UdcRepresent 2 times of three-level inverter DC voltage；
Step 5：Two level resolute U ＇ are can obtain using following formularef1, U ＇ref2It is each relative in three-phase static coordinate system abc
The value U ＇ for the three-phase answeredrefax, U ＇refbx, U ＇refcx：
U ＇refx=Urefx-Ubasex
Urefx=[Urefax Urefbx Urefcx]T
U ＇refx=[U ＇refaxU ＇refbxU ＇refcx]T
Ubasex=[Ubaseax Ubasebx Ubasecx]T
U ＇refax=Urefax-Ubaseax
U ＇refbx=Urefbx-Ubasebx
U ＇refcx=Urefcx-Ubasecx
Wherein, x ∈ (1,2)；
Step 6：Using unified fast algorithm, by the two two level resolute U ＇ref1, U ＇ref2The value of three-phase pass through following formula
The imagination switch switching instant T of the three-phase bridge arm of two each corresponding level resolutes is can obtain after processingas1、Tbs1、Tcs1With
Tas2、Tbs2、Tcs2：
<mrow>
<msub>
<mi>T</mi>
<mrow>
<mi>p</mi>
<mi>s</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<mn>2</mn>
<mo>&CenterDot;</mo>
<msubsup>
<mi>U</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
<mi>p</mi>
<mi>q</mi>
</mrow>
<mo>&prime;</mo>
</msubsup>
</mrow>
<msub>
<mi>U</mi>
<mrow>
<mi>d</mi>
<mi>c</mi>
</mrow>
</msub>
</mfrac>
<mo>&CenterDot;</mo>
<msub>
<mi>T</mi>
<mi>s</mi>
</msub>
</mrow>
Tmaxq=max (Tasq,Tbsq,Tcsq)
Tminq=min (Tasq,Tbsq,Tcsq)
Teffq=Tmaxq-Tminq
Wherein, p ∈ (a, b, c), q ∈ (1,2), TmaxAnd TminRepresent respectively in the imagination switch switching instant of three-phase bridge arm most
Big value and minimum value, TeffFor effective acting time, so-called effective acting time, refer to inverter in a switch periods Ts
The output level number asynchronous period of interior three-phase bridge arm, because only that when the three-phase bridge arm output level number of inverter is different
When, inverter could power output；
Step 7：Two two level resolute U ＇ are can obtain using following formularef1, U ＇ref2Three-phase under space voltage vector modulation
The actual switch switching instant T of bridge armga1、Tgb1、Tgc1And Tga2、Tgb2、Tgc2：
Tgxy=Txsy+Toffsety
T0y=Ts/2-Teffy
<mrow>
<msub>
<mi>T</mi>
<mrow>
<mi>o</mi>
<mi>f</mi>
<mi>f</mi>
<mi>s</mi>
<mi>e</mi>
<mi>t</mi>
<mi>y</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<msub>
<mi>T</mi>
<mrow>
<mn>0</mn>
<mi>y</mi>
</mrow>
</msub>
<mn>2</mn>
</mfrac>
<mo>-</mo>
<msub>
<mi>T</mi>
<mrow>
<mi>m</mi>
<mi>i</mi>
<mi>n</mi>
<mi>y</mi>
</mrow>
</msub>
</mrow>
Wherein, TxsyRepresent the imagination switch switching instant of inverter three-phase bridge arm, TeffyThe effective period of time of inverter is represented,
TminyRepresent the minimum value of the imagination switch switching instant of inverter three-phase bridge arm, TgxyRepresent the reality of inverter three-phase bridge arm
Switch switching instant, ToffsetyRepresent shift time, and x ∈ (a, b, c), y ∈ (1,2)；
Step 8：The on off state of the two two level resolutes obtained by step 7, it only has two kinds of (0,1), if to drive
Dynamic two diode-clamped three-level inverters work is just needed to sector where revised two two level resolutes
On off state carries out uncorrecting, i.e. one group of on off state plus place sector zone center vector；According to step 2 and step
Three sector partitioning method, the on off state of center vector is as shown in the table corresponding to 1~6 sector：
Wherein, 0,1,2 three-level inverter is represented respectively per phase n, o, p output level, the different sectors pair listed using upper table
The on off state can for the center vector answered completes uncorrecting process to the on off state of two all two level resolutes；
Step 9：The on off state obtained according to step 8, calculate inverter 1 and inverter 2 in dual three-level inverter
The dutycycle of the switching signal of each road power switch pipe；
Step 10：The timer 1 of allocating digital signal processor, for producing the triangle carrier signal of 5kHz high frequencies；
Step 11：The switching signal dutycycle that the three-level inverter Zhong Ge roads power tube obtained according to step 9 switchs calculates
And the value of comparand register in digital signal processor is updated, so as in the task manager A and event of digital signal processor
12 tunnel pulses are produced in manager B, recycle 12 tunnel pulses of the field programmable gate array to being sent from digital signal processor
Negated, obtain 24 tunnel pulsed drive, two diode-clamped three-level inverter work, complete to dual three-level inversion
The space vector modulation process of device, realizes the elimination to dual three-level inverter system residual voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510390570.0A CN104935196B (en) | 2015-07-06 | 2015-07-06 | The space vector modulating method that dual three-level inverter system residual voltage eliminates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510390570.0A CN104935196B (en) | 2015-07-06 | 2015-07-06 | The space vector modulating method that dual three-level inverter system residual voltage eliminates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104935196A CN104935196A (en) | 2015-09-23 |
| CN104935196B true CN104935196B (en) | 2017-11-14 |
Family
ID=54122207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510390570.0A Expired - Fee Related CN104935196B (en) | 2015-07-06 | 2015-07-06 | The space vector modulating method that dual three-level inverter system residual voltage eliminates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104935196B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914781B (en) * | 2016-04-28 | 2018-10-30 | 北京京东方能源科技有限公司 | Zero sequence circulation inhibition method, device and gird-connected inverter control method for parallel connection system |
| JP7063322B2 (en) * | 2017-03-29 | 2022-05-09 | 日本電産株式会社 | Power converter, motor drive unit and electric power steering device |
| CN108039829B (en) * | 2017-12-20 | 2020-05-19 | 中国人民解放军海军工程大学 | Dual-multilevel synchronous control method for pulse power inverter |
| CN109831108A (en) * | 2019-03-14 | 2019-05-31 | 华南理工大学 | A kind of three-level current transformer SVPWM method based on resolution of vectors |
| CN112653369B (en) * | 2020-10-30 | 2022-04-29 | 北方工业大学 | Multi-mode pulse width modulation switching method |
| CN112701947B (en) * | 2021-01-25 | 2022-02-18 | 南昌工程学院 | Cascade multilevel converter based on zero sequence voltage minimum space vector modulation control |
| CN115313886B (en) * | 2022-10-09 | 2023-01-17 | 武汉新能源接入装备与技术研究院有限公司 | Interleaving parallel five-level converter space vector modulation method and system |
| CN116155067B (en) * | 2023-04-18 | 2023-07-07 | 湖南大学 | Switching frequency optimization control model, method and device based on zero sequence circulation suppression |
| CN116938064B (en) * | 2023-09-16 | 2023-12-05 | 中国人民解放军海军工程大学 | Common direct current bus open winding PMSLM zero sequence current suppression method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618491A (en) * | 2013-11-21 | 2014-03-05 | 中国矿业大学 | SVPWM strategy based on power supply topology of double three-level inverters |
-
2015
- 2015-07-06 CN CN201510390570.0A patent/CN104935196B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618491A (en) * | 2013-11-21 | 2014-03-05 | 中国矿业大学 | SVPWM strategy based on power supply topology of double three-level inverters |
Non-Patent Citations (2)
| Title |
|---|
| A New Simplified Space–Vector PWM Method for Three-Level Inverters;Jae Hyeong Seo 等;《IEEE TRANSACTIONS ON POWER ELECTRONICS》;20010730;第16卷(第4期);第545-550页 * |
| 开绕组电机双端级联式五电平逆变器调制策略研究;吴迪;《中国博士学位论文全文数据库工程科技II辑》;20141225(第12期);第五章第5.1、5.2节及附图2-1、5-3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104935196A (en) | 2015-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104935196B (en) | The space vector modulating method that dual three-level inverter system residual voltage eliminates | |
| Kwasinski et al. | Time domain comparison of pulse-width modulation schemes | |
| CN207135021U (en) | A kind of multi-inverter electric machine controller | |
| CN105680713A (en) | A zero sequence circulating current suppression system and method for SHEPWM-based multiple T-type three-level inverters | |
| JP7169595B2 (en) | Rotating electric machine controller | |
| Peddapelli | Recent advances in pulse width modulation techniques and multilevel inverters | |
| CN110098757B (en) | Mixed carrier phase-shift modulation method of mixed cascade H-bridge multi-level inverter | |
| Jena et al. | Comparative analysis of harmonic reduction of VSI fed induction motor using SVPWM and sinusoidal PWM | |
| WO2021131203A1 (en) | Rotary electric machine control device | |
| CN105634365A (en) | Multiple discontinuous PWMs-based permanent magnet synchronous motor control system and method | |
| Haris et al. | Comparison of SPWM multilevel inverter fed PMSM drive with two level inverter fed drive | |
| Zolfagharian et al. | A new modulation technique for improving the performance of two-phase cascaded H-bridge multilevel inverter | |
| Pradeepa et al. | Adoption of SVPWM Technique to CSI and VSI | |
| KR101200815B1 (en) | A three level space vector pwm overmodulation control apparatus and its method | |
| CN107947619A (en) | There are two level carrier phase-shift PWM modulator approaches of common-mode voltage rejection ability suitable for multiphase system | |
| Yousef | Space vector pulse width modulation technique | |
| Mane et al. | Performance of 5-level NPC inverter with multi-multicarrier multi-modulation technique | |
| Reddy et al. | A novel configuration to eliminate dominant Harmonic frequency (DHF) by using FFT in series active filters | |
| CN104682404A (en) | Cascade SVG based on PAM and PWM hybrid modulation | |
| CN105450075B (en) | A kind of Z-source inverter control method based on space vector pulse width modulation | |
| CN104467593B (en) | Control method for overmodulation of variable frequency motor | |
| Imarazene et al. | Optimized total harmonics distortion PWM and multi-carries PWM: Comparison | |
| Satiawan et al. | Improved Modulation Methods of the Dual-inverter Fed Open-end Winding Three-phase Motor Drives with Equal DC-link Voltage | |
| Prasad et al. | Simulation of five-level inverter fed PMSM based on fast SVPWM | |
| Rao et al. | Crucial voltage identification of a seven level multilevel inverters using AMM for microgrid applications |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171114 Termination date: 20190706 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |