CN105897005B - A kind of dual-level matrix frequency converter and its fault tolerant control method with fault tolerance - Google Patents

A kind of dual-level matrix frequency converter and its fault tolerant control method with fault tolerance Download PDF

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CN105897005B
CN105897005B CN201610356428.9A CN201610356428A CN105897005B CN 105897005 B CN105897005 B CN 105897005B CN 201610356428 A CN201610356428 A CN 201610356428A CN 105897005 B CN105897005 B CN 105897005B
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fault
way switch
rectification stage
circuit
stage circuit
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CN105897005A (en
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石宝平
周波
秦显慧
韩娜
李业
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/1216—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for AC-AC converters
    • 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
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

The present invention provides a kind of dual-level matrix frequency converter and its fault tolerant control method with fault tolerance.The present invention introduces a fault tolerable circuit on the basis of general dual-level matrix frequency converter topological structure, the fault tolerable circuit is the bridge arm being made of two two-way switch pipes drawn in three-phase input AC power neutral point, which is connected respectively with the positive and negative both ends of rectification stage circuit direct bus bar side.By being respectively controlled to two two-way switch in fault tolerable circuit, the present invention can make dual-level matrix frequency converter in rectification stage circuit some two-way switch pipe drive signal lose or open circuit breakage fault condition under, still high quality electric energy can be provided to load, realize fault-tolerant operation.

Description

A kind of dual-level matrix frequency converter and its fault tolerant control method with fault tolerance
Technical field
The invention belongs to power electronics fields, are related to dual-level matrix frequency converter, particularly a kind of to have fault-tolerant work( The dual-level matrix frequency converter and its fault tolerant control method of energy.
Background technology
It is fault-tolerant, it is exactly the abbreviation of fault tolerant.With the development of science and technology, to the Stability and dependability of power-supply system It is it is required that higher and higher.In some application scenarios, such as the high leading-edge field of aerospace is, it is necessary to which power inverter can possess in event The ability of fault-tolerant operation is realized under barrier state.Power device works as power device as the basic device for forming various power inverters When part damages, power inverter will be caused to lose service ability or even trigger catastrophic consequence, therefore to power inverter Faults-tolerant control research be necessary.
Dual-level matrix frequency converter (TSMC) is a kind of new frequency converter, it not only has classical matrix converter (MC) The advantages that energy capable of bidirectional flowing, stability are good, input-output wave shape is sinusoidal, and also overcome the classical matrix converter change of current The shortcomings of strategy and complicated clamp circuit, large capacity storage capacitor is abandoned, there is development potentiality and application prospect, be to learn in recent years The hot spot of art circle research.Although domestic and foreign scholars to the modulation strategy, topological structure, input current of dual-level matrix frequency converter with Output voltage closed-loop control etc. conducts in-depth research, and achieves significant achievement, but on stage type matrixing The faults-tolerant control of device but rarely has pertinent literature.Inverse cascade and traditional three-phase inverter in view of dual-level matrix frequency converter are simultaneously Indifference, some external scholars have carried out research and analysis to the failure tolerant control of dual-level matrix frequency converter inverse cascade, but It is less on the relevant research of TSMC rectification stage faults-tolerant controls.Document [1] input filter capacitance neutral point draw by The bridge arm of single-way switch composition, the introducing of the bridge arm allow TSMC dc bus side to provide a variety of current potentials to inverse cascade.This article It offers and controls additional bridge arm as an entirety with inverse cascade, propose a kind of more level dual-level matrix frequency converters, not It is related to TSMC faults-tolerant controls.The patent of Publication No. 105356764A《Z sources stage type matrixing with Fault-Tolerant Topology structure Device and its control method》In the bridge arm that the extraction of input power neutral point is made of single-way switch, pass through the bridge arm and faults-tolerant control Strategy realizes fault-tolerant operation, but is only applicable to Z sources dual-level matrix frequency converter.
Dual-level matrix frequency converter can be divided into rectification stage and inverse cascade by topological structure, rectification stage to three-phase input voltage into Row chop control is powered to rear class inverse cascade, in TSMC practical applications, if rectification stage two-way switch pipe occurs damaging or drive The failures such as dynamic dropout, certainly will produce serious influence to inverse cascade output voltage quality, and then cause entire TSMC systems Hydraulic performance decline is even out of control, therefore it is essential to carry out on TSMC rectification stage Fault-Tolerance Technology Research.
Bibliography：
[1] P.C.Loh, R.J.Rong, F.Blaabjerg, L.Shan, and P.Wang.Carrier-Based Modulation Schemes for Various Three-Level Matrix Converters
The content of the invention
Goal of the invention：In order to solve the above technical problems, the present invention proposes a kind of stage type matrix with fault tolerance Converter and its fault tolerant control method.For some two-way switch pipe in TSMC rectification stage circuits occur drive signal lose or The fault conditions such as open circuit breakage realize that TSMC nonserviceables lower fault-tolerant operation, tool by the faults-tolerant control strategy of simple possible There are researching value and application prospect.
Technical solution：The technical scheme is that：
A kind of dual-level matrix frequency converter with fault tolerance, including：Three-phase alternating current input power, rectification stage circuit, Inverter circuit and fault tolerable circuit；The fault tolerable circuit includes the two-way switch S of two series connection1、S2, S1、S2Tie point and three-phase The neutral point of alternating current input power supplying is connected；S1The other end be connected with the anode (P) of rectification stage circuit direct bus bar side, S2It is another One end is connected with the negative terminal (N) of rectification stage circuit direct bus bar side；The rectification stage circuit is by 6 two-way switch pipe Sap、 Sbp、Scp、San、Sbn、ScnThe rectified three-phase circuit of composition；Wherein, SapAnd San、SbpAnd Sbn、ScpAnd ScaSeries connection forms three respectively A bridge arm, Sap、Sbp、ScpRespectively correspond to the upper tube of bridge arm, San、Sbn、ScnRespectively correspond to the down tube of bridge arm, three bridge arms Upper, lower tube is connected respectively with the anode of rectification stage circuit direct bus bar side (P) and negative terminal (N)；SapAnd San、SbpAnd Sbn、ScpWith ScnTie point be connected respectively with three output terminals of three-phase alternating current input power.
Further, the two-way switch S1、S2It is connected by two IGBT device common emitters with anti-paralleled diode Composition.
Further, the inverter circuit is the three-phase bridge electricity being made of 6 IGBT devices with anti-paralleled diode Road.
The present invention also proposes a kind of fault tolerant control method of the dual-level matrix frequency converter with fault tolerance, including step Suddenly：
(1) the above-mentioned dual-level matrix frequency converter with fault tolerance is built；
(2) by two two-way switch S in fault tolerable circuit1、S2It is respectively controlled, can realize stage type matrix Fault-tolerant operation under nonserviceabling, concretely comprises the following steps：
When each two-way switch pipe normal work in rectification stage circuit, the space vector modulation of input current is taken based on Strategy；
When drive signal loss occurs in some two-way switch pipe of anode (P) connection with rectification stage circuit direct bus bar side Or during open circuit breakage failure, the drive signal of the two-way switch pipe to break down is switched to S immediately1；It is two-way when failure When the input phase voltage that switching tube is connect is that entire space vector sector is positive maximum, to the sector, modulated signal does following place Reason：S1Permanent open-minded, two down tubes not broken down in rectification stage circuit are open-minded in the following way：In the space vector sector The front half section time, the two-way switch being connected with the input phase absolute value of voltage larger one is first open-minded, another two-way switch Guan Ze It is open-minded in the latter half of the space vector sector；The tune of modulated signal and inverse cascade to other sectors of rectification stage circuit Signal processed does not process；
When drive signal loss occurs in some two-way switch pipe of negative terminal (N) connection with rectification stage circuit direct bus bar side Or during open circuit breakage failure, the drive signal of the two-way switch pipe to break down is switched to S immediately2；When the switch of failure Connected input phase voltage is managed when being entire space vector sector negative sense maximum, modulated signal does following processing to the sector：S2 Permanent open-minded, two upper tubes not broken down in rectification stage circuit are open-minded in the following way：In the space vector sector first half The section time, the two-way switch being connected with the input phase absolute value of voltage larger one is first open-minded, another two-way switch Guan Ze is at this The latter half of space vector sector is open-minded；The modulation letter of modulated signal and inverse cascade to other sectors of rectification stage circuit It number does not process.
Advantageous effect：Compared with prior art, the present invention has the following advantages：
1) on the basis of existing dual-level matrix frequency converter topological structure, one is drawn in three-phase input AC power neutral point It is flexible when a bridge arm being made of two two-way switch, the introducing of the bridge arm substantially increase TSMC rectification stage faults-tolerant controls Degree.
2) faults-tolerant control strategy is simple and reliable, it is only necessary to the used Space Vector Modulation Strategy base when TSMC is worked normally Some simple processing are done on plinth to the modulated signal of rectification stage, faults-tolerant control strategy is easily understood and realizes.
3) lost or during open circuit breakage fault condition when drive signal occurs in TSMC rectification stages some two-way switch pipes, according to Can so load be given to provide high quality electric energy, realize fault-tolerant operation, improve the Stability and dependability of TSMC.
Description of the drawings
Fig. 1 is the topology diagram of the dual-level matrix frequency converter in the embodiment of the present invention with fault tolerance；
Fig. 2 is current phasor distribution map；
Fig. 3 is rectification stage circuit input voltage interval division figure in embodiment；
Fig. 4 is the S in normal work of the dual-level matrix frequency converter with fault tolerance described in embodimentap、SbpWith Scn's Drive signal simulation waveform；
Fig. 5 is in embodiment, works as ScnIt damages, S under fault-tolerant operation stateap、SbpAnd S2Drive signal simulation waveform；
Fig. 6 is in embodiment, works as ScnDamage, rectification stage circuit direct busbar and output electricity when not taking faults-tolerant control strategy Press simulation waveform；
Fig. 7 is in embodiment, works as ScnDamage, rectification stage circuit direct busbar and output voltage when taking faults-tolerant control strategy Simulation waveform；
Fig. 8 is the S in normal work of the dual-level matrix frequency converter with fault tolerance described in embodimentan、ScnAnd Sbp's Drive signal simulation waveform；
Fig. 9 is in embodiment, works as SbpIt damages, S under fault-tolerant operation statean、ScnWith S1Drive signal simulation waveform；
Figure 10 is in embodiment, works as SbpDamage, rectification stage circuit direct busbar and output when not taking faults-tolerant control strategy Voltage simulation waveform；
Figure 11 is in embodiment, works as SbpDamage, rectification stage circuit direct busbar and output electricity when taking faults-tolerant control strategy Press simulation waveform.
Specific embodiment
The present invention is further described below in conjunction with the accompanying drawings.
The dual-level matrix frequency converter topological structure with fault tolerance in the present embodiment is as shown in Figure 1, the twin-stage Formula matrix converter includes：Three-phase alternating current input power, rectification stage circuit and inverse cascade circuit；The present embodiment is in the stage type On the basis of matrix converter topological structure, one is drawn by two two-way switch S in three-phase input AC power neutral point1、S2Structure Into bridge arm, which is connected with rectification stage circuit direct bus bar side both ends.
The dual-level matrix frequency converter with fault tolerance takes Double Space Vector Modulation strategy in normal work, S1With S2Perseverance shut-off.Fig. 2 is input current vector distribution map, the current matrix I in figureI~IVIThe first row represent Sap、Sbp、Scp The logical state of pipe, the second row represent San、Sbn、ScnThe on off operating mode of pipe, wherein 1 represents open-minded, 0 represents shut-off.Fig. 3 is basis The corresponding interval division figure that Fig. 2 makes three-phase input voltage.
When drive signal loss or open circuit breakage failure feelings occurs in some two-way switch pipe in TSMC rectification stage circuits During condition, specific faults-tolerant control strategy is as follows：
(1) rectification stage two-way switch pipe San、SbnOr ScnIn some two-way switch pipe occur drive signal lose or During open circuit breakage failure, the drive signal of the two-way switch pipe to break down is switched to S immediately2.As breakdown switch Guan Suolian Input phase voltage when being entire sector negative sense maximum, to the sector, modulated signal does following processing：S2It is permanent open-minded, rectification stage electricity Two upper tubes that Lu Zhongwei breaks down are open-minded in the following way：In the space vector sector front half section time, with the input phase The two-way switch that absolute value of voltage larger one is connected is first open-minded, another two-way switch Guan Ze is after the space vector sector Half time is open-minded；Build DC bus-bar voltage using phase voltage is inputted, to the modulated signals of other sectors of rectification stage with And the modulated signal of inverse cascade does not process.It, below will be with S in order to without loss of generalitycnExemplified by damage, faults-tolerant control is told about in detail Concrete methods of realizing.
When detecting two-way switch pipe ScnDuring damage, immediately by ScnDrive signal be switched to S2.From the figure 3, it may be seen that it is fanning Area II, ScnConnected input phase voltage is that entire sector negative sense is maximum.When TSMC is worked normally, reference input current phasor is located at During the II of sector, in any one modulation period, ScnOpen-minded, the S of perseveranceapWith SbpIt is each according to the obtained duty cycle of PWM Algorithm It opens a period of time, as shown in Figure 4 (note：Black portions represent that switching tube is frequently opened and shut off in figure).Work as ScnDuring damage, Ensure on the premise of just being born down on DC bus-bar voltage, in order to improve DC bus-bar voltage amplitude, to the modulated signal of sector II Do following processing：To any one modulation period in the sector, S is made2Open-minded, the sector front half section time S of perseveranceapIt is permanent open-minded, fan Area latter half SbpIt is permanent open-minded, it (notes as shown in Figure 5：Black portions represent that switching tube is frequently opened and shut off in figure).Exist Sector II, SapWith SbpIt is not modulated according to PWM Algorithm, at this time DC bus-bar voltage UpnThe period is modulated at first t1For ua, time period t is modulated at second2For ub。
Other five sectors of rectification stage circuit and the modulated signal of inverse cascade, by Space Vector Modulation Strategy during normal work It is modulated, other sectors of rectification stage DC bus-bar voltage U when will analyze TSMC fault-tolerant operations belowpn。
Sector IV, V and VI：Current phasor used in these three sectors need not use ScnIt is modulated, thus it is fault-tolerant Failure operation dc bus Shen is identical when pressing with normal work.
Sector I：Due to ScnDrive signal be switched to S2, therefore in any one modulation period, DC bus-bar voltage UpnRespectively line voltage uabWith phase voltage ua.Under normal operating conditions, in any one modulation period, DC bus-bar voltage difference For line voltage uabWith line voltage uac。
Sector III：Due to ScnDrive signal be switched to S2, therefore in any one modulation period, dc bus electricity Press UpnRespectively line voltage ubaWith phase voltage ub.Under normal operating conditions, in any one modulation period, DC bus-bar voltage point It Wei not line voltage ubaWith line voltage ubc。
Fig. 6 is related simulation waveform to Fig. 7.
(2) rectification stage two-way switch pipe Sap、SbpOr ScpIn some two-way switch pipe occur drive signal lose or Open circuit breakage failure
As rectification stage two-way switch pipe Sap、SbpOr ScpIn some two-way switch pipe occur drive signal lose or During open circuit breakage failure, breakdown switch pipe drive signal is switched to S immediately1.When the input phase voltage that breakdown switch pipe is connect When being that entire sector is positive maximum, to the sector, modulated signal does following processing：S1It is permanent open-minded, event does not occur in rectification stage circuit Two upper tubes of barrier are open-minded in the following way：In the space vector sector front half section time, with the input phase absolute value of voltage compared with Big one two-way switch being connected is first open-minded, another two-way switch Guan Ze is opened in the latter half of the space vector sector It is logical；DC bus-bar voltage is built using phase voltage is inputted, the modulated signal and inverse cascade to other sectors of rectification stage Modulated signal does not process.It, below will be with S in order to without loss of generalitybpExemplified by damage, faults-tolerant control specific implementation side is told about in detail Method.
When detection switch pipe damages SbpWhen, immediately by SbpDrive signal be switched to S1.From the figure 3, it may be seen that in sector III, SbpConnected input phase voltage is that entire sector is positive maximum.When TSMC is worked normally, reference input current phasor is located at sector During III, in any one modulation period, SbpOpen-minded, the S of perseveranceanWith ScnIt is each open-minded according to the obtained duty cycle of PWM Algorithm For a period of time, (note as shown in Figure 8：Black portions represent that switching tube is frequently opened and shut off in figure).Work as SbpDuring damage, ensuring On DC bus-bar voltage it is just lower negative on the premise of, in order to improve DC bus-bar voltage amplitude, the modulated signal of sector III is done as Lower processing：To any one modulation period in the sector, S1Open-minded, the sector front half section time S of perseverancecnPermanent open-minded, sector is later half Section time SanIt is permanent open-minded, it (notes as shown in Figure 9：Black portions represent that switching tube is frequently opened and shut off in figure).I.e. in sector III, ScnWith SanIt is not modulated according to PWM Algorithm, at this time DC bus-bar voltage UpnTime period t is modulated at first3 For-uc, time period t is modulated at second4For-ua。
Other five sectors of rectification stage and the modulated signal of inverse cascade are carried out by Space Vector Modulation Strategy during normal work Modulation, other sectors of rectification stage DC bus-bar voltage U when will analyze TSMC fault-tolerant operations belowpn。
Sector I, V and VI：Current phasor used in these three sectors need not use SbpIt is modulated, therefore fault-tolerant event It is identical when barrier operation DC bus-bar voltage is with normal work.
Sector II：Due to SbpDrive signal be switched to S1, therefore in any one modulation period, DC bus-bar voltage Upn is respectively line voltage uacWith phase voltage-uc.Under normal operating conditions, in any one modulation period, DC bus-bar voltage point It Wei not line voltage uacWith line voltage ubc。
Sector IV：Due to SbpDrive signal be switched to S1, therefore in any one modulation period, DC bus-bar voltage Upn is respectively line voltage ucaWith phase voltage-ua.Under normal operating conditions, in any one modulation period, DC bus-bar voltage point It Wei not line voltage ucaWith line voltage uba。
Figure 10 is related simulation waveform to Figure 11.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (3)

1. a kind of fault tolerant control method of the dual-level matrix frequency converter with fault tolerance, which is characterized in that including step：
(1) dual-level matrix frequency converter of the structure with fault tolerance, including：It is three-phase alternating current input power, rectification stage circuit, inverse Become circuit and fault tolerable circuit；The fault tolerable circuit includes the two-way switch S of two series connection1、S2, S1、S2Tie point intersect with three The neutral point of stream input power is connected；S1The other end be connected with the anode P of rectification stage circuit direct bus bar side, S2The other end It is connected with the negative terminal N of rectification stage circuit direct bus bar side；The rectification stage circuit is by 6 two-way switch pipe Sap、Sbp、Scp、 San、Sbn、ScnThe rectified three-phase circuit of composition；Wherein, SapAnd San、SbpAnd Sbn、ScpAnd ScnSeries connection forms three bridge arms respectively, Sap、Sbp、ScpRespectively correspond to the upper tube of bridge arm, San、Sbn、ScnRespectively correspond to the down tube of bridge arm, the upper, lower tube of three bridge arms It is connected respectively with the anode P and negative terminal N of rectification stage circuit direct bus bar side；SapAnd San、SbpAnd Sbn、ScpAnd ScnTie point point It is not connected with three output terminals of three-phase alternating current input power；
(2) by two two-way switch S in fault tolerable circuit1、S2It is respectively controlled, realizes stage type matrix in failure shape Fault-tolerant operation under state, concretely comprises the following steps：
When each two-way switch pipe normal work in rectification stage circuit, the space vector modulation plan of input current is taken based on Slightly；
When drive signal loss occurs in some two-way switch pipe of the anode P connections with rectification stage circuit direct bus bar side or opens During the bad failure of path loss, the drive signal of the two-way switch pipe to break down is switched to S immediately1；When the two-way switch pipe of failure When the input phase voltage connect is that entire space vector sector is positive maximum, to the sector, modulated signal does following processing：S1It is permanent Open-minded, two down tubes of the bridge arm not broken down in rectification stage circuit are open-minded in the following way：In the space vector sector The front half section time, the two-way switch being connected with the input phase absolute value of voltage larger one is first open-minded, another two-way switch Guan Ze It is open-minded in the latter half of the space vector sector；The tune of modulated signal and inverse cascade to other sectors of rectification stage circuit Signal processed does not process；
When drive signal loss occurs in some two-way switch pipe of the negative terminal N connections with rectification stage circuit direct bus bar side or opens During the bad failure of path loss, the drive signal of the two-way switch pipe to break down is switched to S immediately2；When the switching tube of failure connects Input phase voltage when being entire space vector sector negative sense maximum, to the sector, modulated signal does following processing：S2It is permanent open-minded, Two upper tubes of the bridge arm not broken down in rectification stage circuit are open-minded in the following way：In the space vector sector front half section Time, the two-way switch being connected with the input phase absolute value of voltage larger one is first open-minded, another two-way switch Guan Ze is in the sky Between vector sector latter half it is open-minded；The modulated signal of modulated signal and inverse cascade to other sectors of rectification stage circuit It does not process.
2. a kind of fault tolerant control method of dual-level matrix frequency converter with fault tolerance according to claim 1, It is characterized in that, the two-way switch S1、S2It is made of two IGBT device common emitter connections with anti-paralleled diode.
3. a kind of fault tolerant control method of dual-level matrix frequency converter with fault tolerance according to claim 2, It is characterized in that, the inverter circuit is the three-phase bridge circuit being made of 6 IGBT devices with anti-paralleled diode.
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CN103138599A (en) * 2013-02-25 2013-06-05 南京航空航天大学 Operational control method for two-stage matrix converter
CN105356764A (en) * 2015-10-30 2016-02-24 南京航空航天大学 Z-source two-stage matrix converter with fault-tolerant topology and control method thereof

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