CN105281581B - The inverse cascade fault tolerant control method of full two-way switch type dual stage matrix converter - Google Patents
The inverse cascade fault tolerant control method of full two-way switch type dual stage matrix converter Download PDFInfo
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Abstract
The invention discloses the inverse cascade fault tolerant control method of full two-way switch type dual stage matrix converter, belong to the technical field of power electronic devices faults-tolerant control.The present invention substitutes the single-way switch pipe in former dual stage matrix converter inverse cascade with two-way switch unit, form full two-way switch type dual stage matrix converter, propose the fault tolerant control method opened a way suitable for full two-way switch type dual stage matrix converter inverse cascade single tube short circuit, the short circuit of inverse cascade two-way switch unit open, inverse cascade two-way switch unit, inverse cascade single tube, there is the ability for bearing backward voltage by increasing by 6 switching tube converters in inverse cascade, input and output performance has been taken into account while dual stage matrix converter fault-tolerant strategy is simplified.
Description
Technical field
The invention discloses the inverse cascade fault tolerant control method of full two-way switch type dual stage matrix converter, belongs to electric power electricity
The technical field of sub- device faults-tolerant control.
Background technology
Matrix converter (Matrix Converter, MC) or the dual-level matrix frequency converter (Two developed by it
Stage Matrix Converter, TSMC) because having input and output current sinusoidal, energy in bidirectional flow, input power factor
The features such as adjustable, receive domestic and foreign scholars extensive and lasting concern and research.
Due to obviating the storage capacitor on dc bus, using total silicon power topology, " leaned against compared to tradition
The back of the body " converter, matrix converter service life length, operating temperature limitation is small, compact-sized, and power density is high, suitable for aviation
Space flight etc. requires volume weight occasion high, that working environment is severe.However, these occasions require high to transducer reliability,
Need its can in case of a failure continuous firing to ensure that system is stable.Existing fault-tolerant exhibition of the document to matrix converter
Correlative study is opened, can be divided mainly into two classes.One kind is in the case where keeping original topological structure constant, is opened using residue is available
Closing pipe selection residue can be modulated with output voltage vector, and this method needs detection output current size in real time, and electric current is examined
It is high to survey required precision, and logical algorithm is complex, referring to document 1<Improvement of Matrix Converter
Drive Reliability by Online Fault Detection and a Fault-Tolerant Switching
Strategy>(Khiem Nguyen-Duy,Tian-Hua Liu,Der-Fa Chen,et al.IEEE Trans on
Industrial Electronics,2012,59(1):244-256.)；It is another kind of be added in original transformer configuration it is superfluous
Remaining switching device, when an error occurs, failure output phase complete resection, logical circulation road is provided to zero-sequence current using redundancy device
Footpath.When redundancy is four bridge legs, referring to document 2<Fault-tolerant,matrix converter,permanent
magnet synchronous motor drive for open-circuit failures>(S.Khwan-on,L.De
Lillo,L.Empringham,et al.IET Electric Power Applications,2011,5(8):654-667.),
Above-mentioned fault-tolerant strategy is only capable of exporting two-phase sinusoidal voltage, and with normal operating condition difference, it is fixing still to produce one to system
Ring；If redundancy device is TRIAC, referring to document 3<Fault-Tolerant Structure and
Modulation Strategies With Fault Detection Method for Matrix Converters>
(Sangshin Kwak.IEEE Trans on Power Electronics,2010,25(5):1201-1210.), converter
Though exporting three-phase equilibrium voltage, input current waveform distortion is serious, input power factor control suffering, and structure algorithm is answered
It is miscellaneous, it is not easy to realize.
Dual-level matrix frequency converter has the advantages that the change of current is convenient, clamp circuit is simple compared to direct matrix transform utensil,
With wide application prospect.In above-mentioned fault-tolerant strategy, except increase four bridge legs this method is in dual-level matrix frequency converter
Applied in fault-tolerant, other method is directed to direct matrix transform device mostly.Therefore, a kind of new simple and easy be applicable is found
In the fault-tolerant strategy of dual-level matrix frequency converter, and system input and output side performance is not influenceed, the application to TSMC, have
Significance.
The content of the invention
The technical problems to be solved by the invention are the deficiencies for above-mentioned background technology, there is provided full two-way switch type is double
The inverse cascade fault tolerant control method of level matrix converter, realizes dual stage matrix converter inverse cascade on the premise of bridge arm is not increased
The faults-tolerant control of various faults has simultaneously taken into account input and output performance, solve existing dual stage matrix converter faults-tolerant control it is complicated and
The technical problem of input and output performance can not be taken into account simultaneously.
The present invention adopts the following technical scheme that for achieving the above object：
The inverse cascade fault tolerant control method of full two-way switch type dual stage matrix converter,
In full two-way switch type dual stage matrix converter, so that original single-way switch pipe is copped wave pipe in inverse cascade, each
Copped wave pipe common base or common emitter are connected with normal open pipe, and each copped wave pipe and connected normal open pipe form one of inverse cascade
Two-way switch unit；
There are following two control strategies for the short trouble of inverse cascade difference single tube：
When inverse cascade copped wave tube short circuit failure：The drive signal of two two-way switch units on each bridge arm of rectification stage is exchanged,
At the same time, control the copped wave pipe of another two-way switch unit in the same bridge arm of inverse cascade normal open pipe replacement normal according to converter
Modulation strategy during work carries out switch switching, and opens unspoiled copped wave pipe；
When inverse cascade normal open tube short circuit failure：Keep rectification stage, each switching tube drive signal of inverse cascade constant.
The inverse cascade fault tolerant control method of full two-way switch type dual stage matrix converter,
In full two-way switch type dual stage matrix converter, so that original single-way switch pipe is copped wave pipe in inverse cascade, each
Copped wave pipe common base or common emitter are connected with normal open pipe, and each copped wave pipe and connected normal open pipe form one of inverse cascade
Two-way switch unit；
It is two-way by what is broken down when inverse cascade two-way switch unit open failure or inverse cascade single tube open fault
Switch cuts off from inverse cascade circuit and keeps another two-way switch normal open on failure phase bridge arm, rectification stage two-way switch, inverse
The two-way switch become on level non-faulting phase bridge arm has two kinds of modulation systems within a modulation period：
Mode one：When the two-way switch unit copped wave pipe drive signal to break down is turns off, rectification stage two-way switch
And the drive signal of the switching tube on inverse cascade non-faulting phase bridge arm keeps constant；
Mode two：When the two-way switch unit copped wave pipe drive signal to break down is turns on, each bridge of rectification stage is exchanged
The drive signal of two-way switch unit above and below arm, while it is another two-way to control inverse cascade non-faulting phase normal open pipe to substitute same bridge arm
The copped wave pipe of switch element carries out switch switching according to modulation strategy during converter normal work, and opens inverse cascade non-faulting
Phase copped wave pipe.
The inverse cascade fault tolerant control method of full two-way switch type dual stage matrix converter,
In full two-way switch type dual stage matrix converter, so that original single-way switch pipe is copped wave pipe in inverse cascade, each
Copped wave pipe common base or common emitter are connected with normal open pipe, and each copped wave pipe and connected normal open pipe form one of inverse cascade
Two-way switch unit；
Inverse cascade two-way switch unit short trouble is equivalent to another two-way switch unit on inverse cascade failure phase bridge arm
Open fault, the faults-tolerant control side is used for the open fault of another two-way switch unit on inverse cascade failure phase bridge arm
Method.
As the further optimization side of the inverse cascade fault tolerant control method of the full two-way switch type dual stage matrix converter
Case, switch two kinds of modulation systems only when inverse cascade is in zero vector state, specifically comprise the following steps：
Construct inverse cascade zero vector state：It is double with failure in the moment shut-off inverse cascade non-faulting phase for obtain switching command
Copped wave pipe to switch element homonymy, after above-mentioned copped wave pipe complete switches off, it is all with failure two-way switch list to open inverse cascade
The switching tube of first not homonymy；
Exchange rectification stage two-way switch pipe unit drive signal：After inverse cascade zero vector construction complete, before shut-off switching
The two-way switch unit of opening state is in rectification stage, the two-way switch unit of opening state is in be switched preceding rectification stage
After complete switching off, the normal open pipe with breakdown switch unit homonymy in inverse cascade non-faulting phase is turned off, while opens the non-event of inverse cascade
Hinder the copped wave pipe with breakdown switch unit homonymy, the normal open pipe and copped wave pipe for treating inverse cascade non-faulting phase biswitch unit in phase to cut
After the completion of changing, opening rectification stage according to each modulation system needs the two-way switch unit opened；
Construct the effective vector of inverse cascade：After the completion for the treatment of the switching of rectification stage two-way switch unit, given according to fault tolerant control method
The fixed switching signal construction effective vector of inverse cascade.
Further, the inverse cascade fault tolerant control method of the full two-way switch type dual stage matrix converter, when two kinds
Construction inverse cascade zero vector state step is omitted when inverse cascade is in zero vector state before modulation system switching.
Further, the inverse cascade fault tolerant control method of the full two-way switch type dual stage matrix converter, when two kinds
Construction inverse cascade effective vector state step is omitted when inverse cascade is in zero vector state after modulation system switching.
The present invention uses above-mentioned technical proposal, has the advantages that：
(1) on the premise of dual stage matrix converter basic structure is not changed, with two-way switch alternative transforms device inverse cascade
In single tube, it is proposed that suitable for full two-way switch type dual stage matrix converter inverse cascade single tube short circuit, inverse cascade two-way switch
Unit open, the short circuit of inverse cascade two-way switch unit, the fault tolerant control method of inverse cascade single tube open circuit, by increasing in inverse cascade
6 switching tubes cause converter to have the ability for bearing backward voltage, and the dual stage matrix converter after improvement is not increasing complexity
It is fault-tolerant by the i.e. achievable various faults of the adjustment of modulation strategy on the premise of detecting circuit, simplify faults-tolerant control and entirety
Volume operation need not drop in system, and output voltage and input current waveform are unaffected, and maximum voltage transfer ratio is unaffected；
(2) during inverse cascade driving tube short trouble, DC bus-bar voltage is in negative polarity, is exchanged two on the same bridge arm of rectification stage
The drive signal of two-way switch, the driving tube that inverse cascade normal open pipe is substituted in same bridge arm in another two-way switch carry out switch and cut
Change；Its fault-tolerant strategy is identical with debud mode during normal work during inverse cascade normal open pipe failure, using the faults-tolerant control of the present invention
Converter remains to not drop volume output three phase sine voltage when two kinds of single tube short troubles occurs in inverter after method；
(3) under inverse cascade two-way switch unit open, single tube open fault, switch switching does not occur for failure phase switching tube,
Equivalent switching is realized by the Mode variation of non-faulting phase, exports useful signal, three-phase output voltage and input current waveform are still
For the sine wave of three-phase symmetrical, i.e., failure tolerant strategy of the invention realizes inverse cascade two-way switch unit open, single tube is opened
The faults-tolerant control of road failure, while taken into account input and output performance；
(4) during inverse cascade two-way switch unit short trouble, because itself and same bridge arm do not damage two-way switch tube open circuit failure
Equivalent, the fault tolerant control method using inverse cascade two-way switch open fault is the fault-tolerant control that the short circuit of two-way switch unit can be achieved
System；
(5) in the faults-tolerant control of inverse cascade two-way switch unit open/short trouble, reasonable arrangement switch switch step,
The switching of two kinds of modulation systems is carried out in the case where inverse cascade is in zero vector state, ensure that fault-tolerant operation is safe and reliable.
Brief description of the drawings
Fig. 1 is the main power topological diagram of full two-way switch type dual stage matrix converter.
Fig. 2 (a), Fig. 2 (b) are respectively inverse cascade output voltage three dimensional vector diagram, rectification stage input current three dimensional vector diagram.
Each switching tube drive waveforms figure of rectification stage inverse cascade and system dc under Fig. 3 (a), Fig. 3 (b) normal operating conditions
Busbar voltage, output voltage and input current waveform figure.
Each switching tube drive waveforms figure of rectification stage inverse cascade under Fig. 4 (a), the fault-tolerant state of Fig. 4 (b) inverse cascade copped wave tube short circuits
And system dc busbar voltage, output voltage and input current waveform figure.
Each switching tube driving of rectification stage inverse cascade under Fig. 5 (a), the fault-tolerant state of Fig. 5 (b) inverse cascade two-way switch unit opens
Waveform and system dc busbar voltage, output voltage and input current waveform figure.
Embodiment
Embodiments of the present invention are described below in detail, the embodiment below with reference to accompanying drawing description is exemplary
, it is only used for explaining the present invention, and be not construed as limiting the claims.
It will be understood to those skilled in the art that unless otherwise defined, all terms used herein (including technical term
And scientific terminology) there is the general understanding identical meaning of the ordinary technical staff in the technical field of the invention.Should also
Understand, those terms defined in such as general dictionary, which should be understood that, to be had and the meaning in the context of prior art
The consistent meaning of justice, and unless defined as here, will not be with idealizing or the implication of overly formal be explained.
(1) the topological structure introduction of full two-way switch type dual stage matrix converter
Full two-way switch type dual stage matrix converter topological structure as shown in figure 1, main power topological diagram by rectification stage, direct current
Bus and inverse cascade three parts composition.Wherein, three-phase A is inputted, B, C are represented, export three-phase U, V, W expression, dc bus
Two-stage be designated as P and N respectively.Rectification stage is the three-phase bridge circuit combined by six two-way switch units, and six two-way
Switch element can use SYM(Y=A, B, C；M=p, n) represent, it is intended that connection input Y phases and dc bus M ends；Inverse cascade is from original
Six single-way switch pipes be changed to six two-way switch units, this change makes it have the ability for bearing backward voltage, direct current
Busbar voltage polarity can in some cases reversely, six two-way switch unit SXM(X=U, V, W；M=p, n) represent, it is intended that
Connect outlet side X phases and dc bus M ends.
(2) normal operating condition
The on off operating mode available element of general dual stage matrix converter inverse cascade switching tube is all 0 or 11 × 3 matrix table
Show, totally 8 kinds of Switch State Combination in Power Systems, respectively U0=[0 0 0], U1=[1 0 0], U2=[1 1 0], U3=[0 1 0], U4=
[0 1 1], U5=[0 0 1], U6=[1 0 1], U7=[1 1 1], wherein 0 represents phase down tube conducting, 1 expression upper tube is led
It is logical.In 8 Switch State Combination in Power Systems, U0And U7For zero vector, U1~U6For effective vector.Plane is divided into 6 by six effective vectors
Individual sector, sector number Si(i=I, II~VI) is represented, as shown in Fig. 2 (a).Rectification stage totally 9 kinds of assembled states, wherein 6 have
Vector, 3 zero vectors are imitated, plane is equally divided into six sectors, sector number S by six effective vectorsr(r=I, II~VI)
Represent, as shown in Fig. 2 (b).Rectification stage inverse cascade sector can be combined, and form 36 kinds of assembled states.
For full two-way switch type dual stage matrix converter, S is usedXMj(j=1,2) represents inverse cascade two-way switch list respectively
Two switching tubes in member, corresponding relation are as shown in Figure 1.During normal operation, rectification stage uses the double space-vector without zero vector
Modulation, DC voltage UpnFor just, SXM1Switch switch sequence is determined according to output reference voltage size and residing sector position and led
Logical time length, referred to as copped wave pipe identical with general dual stage matrix converter inverse cascade switching tube running status, SXM2In the beginning
Whole opening state, system operation is not had an impact, referred to as normal open pipe.Sector I is in rectification stage, inverse cascade is in sector I
Exemplified by, under normal operating conditions shown in each switching tube drive waveforms schematic diagram such as Fig. 3 (a) of rectification stage inverse cascade, outlet side U, V, W
Three-phase copped wave pipe switchs time sequencing t of the switching instant according to appearance1~t6Represent, DC bus-bar voltage UpnOutput voltage and
Input shown in unsteady flow oscillogram 3 (b).
From waveform, under normal operating conditions, rectification stage only has two two-way switch units and entered in a modulation period
Row switch switching, each copped wave pipe of inverse cascade carry out switch switching twice, and switch switching, DC bus-bar voltage do not occur for normal open pipe
UpnFor just, in the sectorial wave of classics, input current and output voltage are three-phase sine-wave.
(3) inverse cascade single tube short trouble fault-tolerant strategy
As copped wave pipe SXm1In it is one or several when there is short trouble, failure pipe can not synthesize the phase by switch motion
Hope output voltage.In view of normal open pipe relative to dc bus NP position and copped wave pipe relative to dc bus PN position etc.
Valency, can be by rectification stage switching tube SYp、SYnDrive signal exchanges so that the DC bus-bar voltage pole reversal, UNPFor just, at the same it is former
First normal open pipe SXm2Copped wave is carried out according to modulation algorithm, unspoiled copped wave pipe keeps normal open.Each switch drive under fault-tolerant state
Signal is represented by：
Wherein, drive signal during each switching tube normal operation of Q expressions, Q*Represent drive signal during fault-tolerant operation.Still
With Sr=I, SiExemplified by=I, shown in the drive waveforms such as Fig. 4 (a) of each switching tube of rectification stage inverse cascade within a modulation period,
DC bus-bar voltage Upn, shown in output three-phase voltage and input three-phase current waveform such as Fig. 4 (b).It can be seen that single tube
Under short trouble fault-tolerant mode, the switching tube being modulated is varied from, but system global switch switching times do not increase, directly
Flow busbar voltage UpnIt is changed into negative pressure, but still keeps sectorial wave, output voltage, input current keeps three phase sine, input and output spy
Property is constant.
As normal open pipe SXm2In it is one or several when there is short trouble, due to the normal open state of itself and short circuit therefore
It is consistent to hinder external performance characteristic, failure does not have an impact to system operation, and therefore, each switching tube drive signal can under fault-tolerant state
Keep constant, be embodied as：
Work as Sr=I, SiDuring=I, the drive waveforms such as Fig. 3 (a) of each switching tube of rectification stage inverse cascade within a modulation period
It is shown.
For the short trouble of one or several switching tubes in the same direction of inverse cascade, full two-way switch type dual stage matrix converter increases
6 switching tubes added provide a set of redundancy device for system, and normal mode of operation is identical with fault-tolerant operation mode modulation strategy,
Differ only in DC bus-bar voltage polarity and chopping switching tube may be different, but both of which can export three phase sine voltage.
(4) inverse cascade two-way switch unit open failure tolerant strategy
When two-way switch cell SxmDuring generation open fault, Sxm1、Sxm2It is isolated from circuit, its equivalent drive signal is permanent
It is zero.The drive signal of non-faulting switching tube need to be according to S during normal modulationxm1State choose, can divide in a modulation period
For two mode：
Mode 1：During normal modulation, Sxm1Drive signal QSxm1=0.
Failure two-way switch cell S under the modexmModulation assignment is not undertaken, modulation of the open fault to non-faulting phase does not have
Influence.Failure bridge arm is not damaged to the copped wave pipe of two-way switch unitConducting, non-faulting phase switching tube still press normal modulation
Mode is modulated, and its drive signal is represented by：
Mode 2：During normal modulation, Sxm1Drive signal QSxm1=1.
Failure two-way switch cell S under the modexmCan not normally, to ensure that this does not depart from system mutually, open failure
The unspoiled two-way switch unit of bridge armThe driving letter of the two-way switch unit of each phase upper and lower bridge arm of transrectification level simultaneously
Number, now DC bus-bar voltage is reverse, to prevent because DC bus-bar voltage reversely causes inverse cascade short circuit, by the non-event of inverse cascade
Hinder the switching tube that position is of equal value in phaseWith WithDrive signal exchange.Under the mode, rectification stage inverse cascade is non-
Failure phase switching tube drive signal can be summarized as：
With Sr=I, Si=I, inverse cascade two-way switch cell SUpExemplified by generation open fault, rectification stage inverse cascade respectively switchs
Shown in drive waveforms such as Fig. 5 (a) in Guan Yi modulation period：In 0~t1, t6~TsIn two periods, SUp1It is normal to adjust
Drive signal when processed is 0, and system works in mode 1；In t1~t6In period, SUp1Drive signal during normal modulation is 1,
System works in mode 2；In t1And t6Moment, S during normal modulationUp1Drive signal change, mutually each switching tube of non-faulting
Mode variation occurs for drive signal.Under this kind of fault-tolerant mode, switch switching does not occur for failure phase switching tube, passes through non-faulting phase
Mode variation realizes equivalent switching, exports useful signal, and non-faulting respectively mutually switchs switching times increase.Direct current under fault-tolerant state
Busbar voltage and three-phase output voltage waveform such as Fig. 5 (b) are shown, now because DC bus-bar voltage enters within a modulation period
Row switching positive and negative twice, envelope is no longer classical sector, but positive and negative two waves, but three-phase output voltage and input
Current waveform is still the sine wave of three-phase symmetrical.
The difference of sector and failure two-way switch unit present position according to residing for output reference voltage, mode 1 and mould
The switching instant of state 2 can be different.6 switch switching instants of U, V, W three-phase are obtained according to normal modulation policy calculation, according to
The sequencing of appearance is designated as t respectively1~t6, then when open fault occurs for different two-way switch units, the mode 2 in 6 sectors
The period of operation can be summarized as table 1.Other times are run according to mode 1 in modulation period.
During the different two-way switch unit open failures of table 1, period that 6 sectors are run according to mode 2
| I | II | III | IV | V | VI | |
| SUp | [t1,t6] | [t1,t6] | [t2,t5] | [t3,t4] | [t3,t4] | [t2,t5] |
| SUn | [0,t1]U[t6, Ts] | [0,t1]U[t6, Ts] | [0,t2]U[t5, Ts] | [0,t3]U[t4, Ts] | [0,t3]U[t4, Ts] | [0,t2]U[t5, Ts] |
| SVp | [t3,t4] | [t2,t5] | [t1,t6] | [t1,t6] | [t2,t5] | [t3,t4] |
| SVn | [0,t3]U[t4, Ts] | [0,t2]U[t5, Ts] | [0,t1]U[t6, Ts] | [0,t1]U[t6, Ts] | [0,t2]U[t5, Ts] | [0,t3]U[t4, Ts] |
| SWp | [t2,t5] | [t3,t4] | [t3,t4] | [t2,t5] | [t1,t6] | [t1,t6] |
| SWn | [0,t2]U[t5, Ts] | [0,t3]U[t4, Ts] | [0,t3]U[t4, Ts] | [0,t2]U[t5, Ts] | [0,t1]U[t6, Ts] | [0,t1]U[t6, Ts] |
(5) inverse cascade single tube open fault is fault-tolerant
The open fault of two-way switch unit where inverse cascade single tube open fault can be equivalent to the single tube, therefore can use
The fault-tolerant strategy of inverse cascade two-way switch unit open failure carries out fault-tolerant.
Specifically：Work as Sxp1During generation open fault, failure can not mutually be connected with dc bus P ends, and failure externally shows
With two-way switch cell SxpGeneration open fault is consistent；When failure occurs in Sxp2Or Sxn1, barrier is mutually in switch switching dead band for some reason
Interior that afterflow passage can not be provided for electric current, each switching tube of failure bridge arm can not carry out switch switching, and failure externally shows and SxpWith
SxnGeneration open fault is consistent；When failure occurs in Sxn2, failure bridge arm can not be provided from dc bus N-terminal to output for electric current
The circulation path of side, when outlet side power factor is relatively low, even if QSxn1=1, failure mutually also can not be with DC bus-bar voltage N-terminal
Connection, failure externally shows and SxnOpen circuit is consistent.
(6) inverse cascade two-way switch unit short trouble is fault-tolerant
When inverse cascade two-way switch cell SxmDuring generation short trouble, Sxm1、Sxm2Continue to keep short-circuit conducting state, it is equivalent
Driving function is 1, and non-faulting switching tube driving function is according to Sxm1State choose, in a modulation period can be divided into two
Mode：
Mode 1：During normal modulation, Sxm1Drive signal QSxm1=1.
The mutually unspoiled two-way switch unit copped wave pipe of failure under the modeIt is held off, simultaneously turns off normal open pipeThe mutually each switching tube of non-faulting is still modulated by normal modulation mode, and its drive signal can be summarized as：
Mode 2：During normal modulation, Sxm1Drive signal QSxm1=0.
Failure two-way switch cell S under the modexmCan not normally it disconnect, to prevent that the phase is short-circuit, shut-off failure bridge arm is not
The two-way switch unit of damageThe drive signal of the two-way switch unit of each phase upper and lower bridge arm of transrectification level simultaneously, now
DC bus-bar voltage is reverse, to prevent because DC bus-bar voltage reversely causes inverse cascade short circuit, inverse cascade non-faulting phase middle position
Put the switching tube of equivalenceWith WithDrive signal exchange, can specifically be summarized as:
The fault-tolerant strategy of inverse cascade two-way switch unit open failure and short trouble is contrasted it can be found that except due to failure
Mode alternative condition caused by difference and failure are not damaged beyond two-way switch unit drive signals difference mutually, two kinds of fault-tolerant strategies
It is identical, two-way switch cell SxmOccur short trouble when each switching tube equivalent drive signal withIt is complete during generation open fault
It is complete consistent, it can useOpen fault fault-tolerant strategy carry out it is fault-tolerant.The short trouble of inverse cascade two-way switch unit can be considered down
The two-way switch unit open failure put.When table 2 gives different switching tubes generation short troubles, mode 2 is transported in 6 sectors
The capable period, the other times in modulation period are the run time of mode 1.
During the different two-way switch short troubles of table 2, period that 6 sectors are run according to mode 2
| I | II | III | IV | V | VI | |
| SUp | [0,t1]U[t6, Ts] | [0,t1]U[t6, Ts] | [0,t2]U[t5, Ts] | [0,t3]U[t4, Ts] | [0,t3]U[t4, Ts] | [0,t2]U[t5, Ts] |
| SUn | [t1,t6] | [t1,t6] | [t2,t5] | [t3,t4] | [t3,t4] | [t2,t5] |
| SVp | [0,t3]U[t4, Ts] | [0,t2]U[t5, Ts] | [0,t1]U[t6, Ts] | [0,t1]U[t6, Ts] | [0,t2]U[t5, Ts] | [0,t3]U[t4, Ts] |
| SVn | [t3,t4] | [t2,t5] | [t1,t6] | [t1,t6] | [t2,t5] | [t3,t4] |
| SWp | [0,t2]U[t5, Ts] | [0,t3]U[t4, Ts] | [0,t3]U[t4, Ts] | [0,t2]U[t5, Ts] | [0,t1]U[t6, Ts] | [0,t1]U[t6, Ts] |
| SWn | [t2,t5] | [t3,t4] | [t3,t4] | [t2,t5] | [t1,t6] | [t1,t6] |
(7) mode 1, the handoff procedure of mode 2
Full two-way switch type dual stage matrix converter is carrying out single tube open circuit, two-way switch unit open, two-way switch list
During the fault-tolerant operation of first short trouble, it is necessary to carry out mode 1, mode 2 toggles, safe and reliable handoff procedure is fault-tolerant
The key of operation.Therefore, the present invention proposes a kind of switching mode of mode.
Observation table 1, table 2 can be found, according to the difference of failure two-way switch cell position and sector number, mode 1 and mode 2
Between switching instant be likely located at inverse cascade zero vector moment or effective vector state moment.To ensure modulation system switching
Security, only inverse cascade be zero vector state under carry out rectification stage two-way switch unit switching.If rectification stage is at two
The front and rear two two-way switch units in opening state of Mode-switch are respectively Sfp、SfnAnd Sep、Sen；X is inverse cascade U, V, W
In failure phase,For U, the non-faulting phase in V, W, m is the dc bus end being connected with failure two-way switch unit, is p, n
In one,For another dc bus end, subscripting 1 for the copped wave pipe in two-way switch unit, subscripting 2 is double
Normal open pipe into switch element, then inverse cascade failure two-way switch unit be represented by Sxm, handoff procedure is divided into following 3 big
Step, 6 small steps：
I. zero vector is constructed
(1) moment of switching command is obtained, shut-off is all(it is in the inverse cascade non-faulting phase in claims
With the copped wave pipe of failure two-way switch unit homonymy).
(2) postpone Δ t, waitIt is open-minded after complete switching off(it is to open inverse cascade institute in claims
Have the switching tube with failure two-way switch unit not homonymy),In the switching tube do not opened form zero vector.
II. transrectification level two-way switch unit drive signals
(3) postpone Δ t, after copped wave pipe is opened completely in waiting 2), turn off SfpAnd Sfn。
(4) postpone Δ t, wait SfpAnd SfnAfter complete switching off, shut-off(inverse cascade as in claims owns
With the switching tube of failure two-way switch unit not homonymy), at the same it is open-minded(it is to open inverse cascade institute in claims
There is the switching tube with failure two-way switch unit not homonymy).
(5) postpone Δ t, waitWithAfter the completion of switching, S is openedepAnd Sen。
III. effective vector is constructed
(6) postpone Δ t, wait SepAnd SenAfter opening completely, switching signal construction effectively arrow is given according to fault-tolerant strategy
Amount, detailed process are consistent with general modulation algorithm.
If the switching instant of mode 1 and mode 2 is located at t1Or t4, because inverse cascade is in zero vector state before switching, can save
Slightly step I；If the switching instant of two mode is located at t3Or t6, because inverse cascade is in zero vector state after switching, step can be omitted
III。
As seen through the above description of the embodiments, those skilled in the art can be understood that the present invention can
Realized by the mode of software plus required general hardware platform.Based on such understanding, technical scheme essence
On the part that is contributed in other words to prior art can be embodied in the form of software product, the computer software product
It can be stored in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are causing a computer equipment
(can be personal computer, server, or network equipment etc.) performs some parts of embodiments of the invention or embodiment
Described method.
Claims (6)
1. the inverse cascade fault tolerant control method of full two-way switch type dual stage matrix converter, it is characterised in that
In full two-way switch type dual stage matrix converter, using original single-way switch pipe in inverse cascade as copped wave pipe,
Each copped wave pipe common base or common emitter are connected with normal open pipe, each copped wave pipe and the composition inversion of connected normal open pipe
One two-way switch unit of level；
There are following two control strategies for the short trouble of inverse cascade difference single tube：
When inverse cascade copped wave tube short circuit failure：The drive signal of two two-way switch units on each bridge arm of rectification stage is exchanged, with this
Meanwhile inverse cascade normal open pipe is controlled to substitute the copped wave pipe of another two-way switch unit in same bridge arm according to converter normal work
When modulation strategy carry out switch switching, and open unspoiled copped wave pipe；
When inverse cascade normal open tube short circuit failure：Keep rectification stage, each switching tube drive signal of inverse cascade constant.
2. the inverse cascade fault tolerant control method of full two-way switch type dual stage matrix converter, it is characterised in that
In full two-way switch type dual stage matrix converter, using original single-way switch pipe in inverse cascade as copped wave pipe,
Each copped wave pipe common base or common emitter are connected with normal open pipe, each copped wave pipe and the composition inversion of connected normal open pipe
One two-way switch unit of level；
When inverse cascade two-way switch unit open failure or inverse cascade single tube open fault, the two-way switch that will break down
Cut off from inverse cascade circuit and keep another two-way switch normal open on failure phase bridge arm, rectification stage two-way switch, inverse cascade
Two-way switch on non-faulting phase bridge arm has two kinds of modulation systems within a modulation period：
Mode one：When the two-way switch unit copped wave pipe drive signal to break down for shut-off when, rectification stage two-way switch and
The drive signal of switching tube on inverse cascade non-faulting phase bridge arm keeps constant；
Mode two：When the two-way switch unit copped wave pipe drive signal to break down is turns on, exchange on each bridge arm of rectification stage
The drive signal of lower two-way switch unit, while control inverse cascade non-faulting phase normal open pipe to substitute same another two-way switch of bridge arm
The copped wave pipe of unit carries out switch switching according to modulation strategy during converter normal work, and opens inverse cascade non-faulting and mutually cut
Wave duct.
3. the inverse cascade fault tolerant control method of full two-way switch type dual stage matrix converter, it is characterised in that
In full two-way switch type dual stage matrix converter, using original single-way switch pipe in inverse cascade as copped wave pipe,
Each copped wave pipe common base or common emitter are connected with normal open pipe, each copped wave pipe and the composition inversion of connected normal open pipe
One two-way switch unit of level；
Inverse cascade two-way switch unit short trouble is equivalent to the open circuit of another two-way switch unit on inverse cascade failure phase bridge arm
Failure, fault-tolerant control described in claim 2 is used for the open fault of another two-way switch unit on inverse cascade failure phase bridge arm
Method processed.
4. the inverse cascade fault tolerant control method of the full two-way switch type dual stage matrix converter according to Claims 2 or 3, its
It is characterised by, switches two kinds of modulation systems only when inverse cascade is in zero vector state, specifically comprise the following steps：
Construct inverse cascade zero vector state：Obtain switching command moment shut-off inverse cascade non-faulting phase in failure two-way opened
Close the copped wave pipe of unit homonymy, after above-mentioned copped wave pipe complete switches off, open inverse cascade it is all with failure two-way switch unit not
The switching tube of homonymy；
Exchange rectification stage two-way switch pipe unit drive signal：After inverse cascade zero vector construction complete, rectification before shut-off switching
The two-way switch unit of opening state is in level, the two-way switch unit in opening state is complete in be switched preceding rectification stage
After shut-off, the normal open pipe with breakdown switch unit homonymy in inverse cascade non-faulting phase is turned off, while open inverse cascade non-faulting phase
In copped wave pipe with breakdown switch unit homonymy, the normal open pipe and copped wave pipe for treating inverse cascade non-faulting phase biswitch unit switched
Cheng Hou, opening rectification stage according to each modulation system needs the two-way switch unit opened；
Construct the effective vector of inverse cascade：After the completion for the treatment of the switching of rectification stage two-way switch unit, given according to fault tolerant control method
Switching signal constructs the effective vector of inverse cascade.
5. the inverse cascade fault tolerant control method of full two-way switch type dual stage matrix converter according to claim 4, it is special
Sign is, construction inverse cascade zero vector state step is omitted when inverse cascade is in zero vector state before two kinds of modulation systems switch
Suddenly.
6. the inverse cascade fault tolerant control method of full two-way switch type dual stage matrix converter according to claim 4, it is special
Sign is, the effective vector state step of construction inverse cascade is omitted when inverse cascade is in zero vector state after two kinds of modulation systems switch
Suddenly.
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| CN107064707B (en) * | 2016-12-16 | 2019-05-31 | 南京航空航天大学 | Open-circuit fault detection method of the dual stage matrix converter in reverse power generation state |
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| CN111490685A (en) * | 2020-04-14 | 2020-08-04 | 湖南工业大学 | Decoupling vector modulation method for three-phase high-frequency chain matrix converter |
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