CN108900103A - The converter power module and inverter for having DC Line Fault self-cleaning ability - Google Patents
The converter power module and inverter for having DC Line Fault self-cleaning ability Download PDFInfo
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- CN108900103A CN108900103A CN201810969174.7A CN201810969174A CN108900103A CN 108900103 A CN108900103 A CN 108900103A CN 201810969174 A CN201810969174 A CN 201810969174A CN 108900103 A CN108900103 A CN 108900103A
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
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Abstract
The present invention relates to a kind of converter power module for having DC Line Fault self-cleaning ability and inverters,Belong to field of power electronics,The converter power module for having DC Line Fault self-cleaning ability includes first order unit,Second level unit and third level unit,Full-control type module and diode are set in first order unit,Second level unit,Full-control type module is set in third level unit,Diode and capacitor,When power module works normally,The on and off of full-control type module is controlled by control signal,The varying level of needs can be exported,Fail lockout power module,Power module only has the current path to capacitor charging,It applies in inverter,When the positive and negative extreme generation short trouble of inverter,As long as being latched all power modules simultaneously,Because current path can only be to the capacitor charging in power module,Capacitance voltage increases,Direct fault current is blocked to eliminate failure scratch start road to provide inverse electromotive force,Realize the self-cleaning of Converter DC-side failure.
Description
Technical field
The present invention relates to power electronics fields, more particularly to a kind of change of current for having DC Line Fault self-cleaning ability
Device power module and inverter.
Background technique
With the continuous development of power electronic technique, high voltage, large capacity have become the important development of power electronic technique
Direction, high voltage, large capacity power electronics inverter have important application in numerous occasions.
High voltage, large capacity multilevel power electronic inverter have a various topological structures, including be based on valve group string
Two level blocks of connection, the more level blocks of diode clamp, the more level blocks of striding capacitance, combination converter structure, the cascade of H bridge
More level blocks, modular multilevel structure (Modular Multilevel Converter, MMC) etc..Wherein, H bridge grade
Join more level blocks, MMC structure because there is modularized design, lack nothing convenient for dilatation, exchange outlet side exit potential harmonic content
The advantages that needing alternating current filter, has in power grid and is more applied successfully.
Traditional MMC structure mostly uses half-H-bridge or H bridge as power unit module.Using the MMC of half-H-bridge or H bridge structure
Structure does not have direct current self-cleaning ability, need to be after being latched all modules in DC side failure, and jumping AC circuit breaker could incite somebody to action
Fault clearance, process is complicated, and the time is longer.
Summary of the invention
Based on this, it is necessary to not have asking for DC Line Fault self-cleaning ability for traditional modularization multi-level converter
Topic provides a kind of new converter power module and inverter for having DC Line Fault self-cleaning ability.
A kind of converter power module having DC Line Fault self-cleaning ability, including first order unit, second level unit
With third level unit；
First order unit includes the first full-control type module and first diode reversely concatenated；
Second level unit includes the second full-control type module, third full-control type module and first capacitor；Second full-control type module
It is in parallel with first capacitor after being concatenated with third full-control type module forward direction；
Third level unit includes the 4th full-control type module, the 5th full-control type module, the second diode and the second capacitor；4th
, fiveth full-control type module and second diode in parallel with the second capacitor after full-control type module and the 5th full-control type module forward direction concatenation
Reversed concatenation；
First full-control type module and first diode are in parallel with the second capacitor after reversely concatenating, the 5th full-control type module and
Two diodes are in parallel with first capacitor after reversely concatenating；
The tie point of first full-control type module and first diode is as the first tie point, the second full-control type module and third
The tie point of full-control type module is used as the second tie point, the first tie point and the second tie point and has DC Line Fault self-cleaning
The output terminal of the converter power module of ability.
According to the converter power module for having DC Line Fault self-cleaning ability of aforementioned present invention, set in first order unit
Full-control type module and diode are set, full-control type module, diode and capacitor are set in second level unit, third level unit, in function
When rate module works normally, the on and off of full-control type module is controlled by control signal, can export the difference electricity of needs
Flat, fail lockout power module, power module only has the current path to capacitor charging, applies in inverter, when changing
When flowing the positive and negative extreme generation short trouble of device, as long as being latched all power modules simultaneously, because current path can only be to power mould
Capacitor charging in block, capacitance voltage increase, and block direct fault current to eliminate failure scratch start road to provide inverse electromotive force,
Realize the self-cleaning of Converter DC-side failure.
Third level unit is multiple, the 5th full-control type mould in previous third level unit in one of the embodiments,
It is in parallel with the second capacitor in the latter third level unit after block and the second diode reversely concatenate；First full-control type module and
First diode is in parallel with the first capacitor in the third level unit of stem after reversely concatenating, and in the third level unit of tail portion
Five full-control type modules and the second diode are in parallel with first capacitor after reversely concatenating.
Third level unit is two in one of the embodiments,.
Third level unit is three in one of the embodiments,.
First full-control type module, the second full-control type module, third full-control type module, the 4th in one of the embodiments,
Full-control type module, the 5th full-control type module include the wholly-controled device and third diode of reverse parallel connection.
The first full-control type module includes insulated gate bipolar transistor T1 and diode D1 in one of the embodiments,
Second full-control type module includes insulated gate bipolar transistor T2 and diode D2, and third full-control type module includes insulated gate bipolar
Transistor npn npn T3 and diode D3, the 4th full-control type module include insulated gate bipolar transistor T4 and diode D4, and the 5th is complete
Controlling pattern block includes insulated gate bipolar transistor T5 and diode D5；
The emitter of insulated gate bipolar transistor T1 connects with the cathode of the anode of diode D1, first diode respectively
It connects, the collector of insulated gate bipolar transistor T1 is connect with the cathode of diode D1, and the second capacitance connection is diode D1's
Between cathode and the anode of first diode；
The collector of insulated gate bipolar transistor T2 is connect with the cathode of the cathode of diode D2, diode D5 respectively,
The emitter of insulated gate bipolar transistor T2 respectively with the collector of insulated gate bipolar transistor T3, diode D2 just
Pole, diode D3 cathode connection, the emitter of insulated gate bipolar transistor T3 respectively with the anode of diode D3, the two or two
The anode connection of pole pipe, first capacitor are connected to the collector and insulated gate bipolar transistor of insulated gate bipolar transistor T2
Between the emitter of T3；
The collector of insulated gate bipolar transistor T4 is connect with the cathode of the cathode of diode D1, diode D4 respectively,
The emitter of the insulated gate bipolar transistor T4 anode with the collector of insulated gate bipolar transistor T5, diode D4 respectively
Connection, the collector of insulated gate bipolar transistor T5 are also connect with the cathode of diode D5, insulated gate bipolar transistor T5
Emitter connect respectively with the cathode of the anode of diode D5, the anode of first diode, the second diode.
The parameter of each insulated gate bipolar transistor is identical in one of the embodiments, and the parameter of each diode is identical,
The parameter of each capacitor is identical.
A kind of inverter, including first group of change of current bridge arm and second group of change of current bridge arm；
The negative pole end of three-phase change of current bridge arm in first group of change of current bridge arm passes through corresponding bridge arm reactor and AC network
Side connection；The positive terminal of three-phase change of current bridge arm in second group of change of current bridge arm passes through corresponding bridge arm reactor and alternating current net side
Connection；
Any one phase change of current bridge arm in first group of change of current bridge arm and second group of change of current bridge arm includes several of concatenation
The above-mentioned converter power module for having DC Line Fault self-cleaning ability, the second tie point in previous power module is with after
The first tie point in one power module connects, and the first tie point after concatenation in the power module of stem is as change of current bridge arm
Positive terminal, negative pole end of second tie point as change of current bridge arm in the power module of tail portion.
According to the inverter of aforementioned present invention, the above-mentioned converter power module for having DC Line Fault self-cleaning ability is answered
In inverter, when inverter works normally, if when the positive and negative extreme generation short trouble of inverter, as long as being latched simultaneously
Power module, because current path can only be to the capacitor charging in power module, capacitance voltage is increased, to provide inverse electromotive force
It blocks direct fault current to eliminate failure scratch start road, realizes the self-cleaning of Converter DC-side failure.
Inverter further includes bridge arm reactor corresponding with first group of change of current bridge arm in one of the embodiments, and
Bridge arm reactor corresponding with second group of change of current bridge arm.
Inverter further includes three charging resistors and one group of three-phase isolation switch in one of the embodiments,；
Three-phase isolation switch is connected between the bridge arm reactor and alternating current net side of corresponding first group of change of current bridge arm, together
When, three-phase isolation switch is connected between the bridge arm reactor and alternating current net side of corresponding second group of change of current bridge arm；Three are isolated
The three-phase of switch is in parallel with three charging resistor one-to-one correspondence.
Detailed description of the invention
Fig. 1 is the structure diagram of the converter power module for having DC Line Fault self-cleaning ability of one embodiment；
Fig. 2 is the structure diagram of the converter power module for having DC Line Fault self-cleaning ability of another embodiment；
Fig. 3 is the structural schematic diagram of the converter power module for having DC Line Fault self-cleaning ability of one embodiment；
Fig. 4 is the structural schematic diagram of three electrical level power modules of one embodiment；
Fig. 5-a, 5-b are three electrical level power modules of one embodiment in working condition current path schematic diagram for the moment；
Fig. 6-a, 6-b are current path schematic diagram of three electrical level power modules of one embodiment in working condition two；
Fig. 7-a, 7-b are current path schematic diagram of three electrical level power modules of one embodiment in working condition three；
Fig. 8-a, 8-b are current path schematic diagram of three electrical level power modules of one embodiment in working condition four；
Fig. 9 is the structural schematic diagram of four electrical level power modules of one embodiment；
Figure 10 is the structural schematic diagram of five electrical level power modules of one embodiment；
Figure 11-a, 11-b are four electrical level power modules of one embodiment in working condition current path signal for the moment
Figure；
Figure 12-a, 12-b are current path signal of four electrical level power modules of one embodiment in working condition two
Figure；
Figure 13-a, 13-b are current path signal of four electrical level power modules of one embodiment in working condition three
Figure；
Figure 14-a, 14-b are current path signal of four electrical level power modules of one embodiment in working condition four
Figure；
Figure 15-a, 15-b are current path signal of four electrical level power modules of one embodiment in working condition five
Figure；
Figure 16 is the inverter that the application of one embodiment has the converter power module of DC Line Fault self-cleaning ability
Structural schematic diagram.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, with reference to the accompanying drawings and embodiments, to this
Invention is described in further detail.It should be appreciated that the specific embodiments described herein are only used to explain the present invention,
And the scope of protection of the present invention is not limited.It also should be noted that for ease of description, being illustrated only and this hair in attached drawing
Bright relevant part rather than full content.
It should be noted that term involved in the embodiment of the present invention " first second third " be only be that difference is similar
Object, do not represent the particular sorted for object, it is possible to understand that ground, " Yi Er third " can be in the case where permission
Exchange specific sequence or precedence.It should be understood that the object that " first second third " is distinguished in the appropriate case can be mutual
It changes, so that the embodiment of the present invention described herein can be real with the sequence other than those of illustrating or describing herein
It applies.
The converter power module provided by the present application for having DC Line Fault self-cleaning ability and inverter, inverter include
The negative pole end of first group of change of current bridge arm and second group of change of current bridge arm, the three-phase change of current bridge arm in first group of change of current bridge arm passes through correspondence
Bridge arm reactor connect with alternating current net side；The positive terminal of three-phase change of current bridge arm in second group of change of current bridge arm passes through corresponding
Bridge arm reactor is connect with alternating current net side；Each phase bridge arm includes that several concatenated have DC Line Fault self-cleaning ability
Converter power module, the positive terminal of the three-phase change of current bridge arm in first group of change of current bridge arm is as direct current output positive terminal, and second
For the negative pole end of three-phase change of current bridge arm in group change of current bridge arm as direct current output negative pole end, inverter can be defeated by alternating current net side
The alternating current entered is changed into direct current electricity output.
It is shown in Figure 1, it is the converter power mould for having DC Line Fault self-cleaning ability of one embodiment of the invention
The structural schematic diagram of block, the converter power module for having DC Line Fault self-cleaning ability in the embodiment, including including
Primary unit 100, second level unit 200 and third level unit 300；
First order unit 100 includes the first full-control type module 110 and first diode 120 reversely concatenated；
Second level unit 200 includes the second full-control type module 210, third full-control type module 220 and first capacitor 230；The
It is in parallel with first capacitor 230 after two full-control type modules 210 and the positive concatenation of third full-control type module 220；
Third level unit 300 includes the 4th full-control type module 310, the 5th full-control type module 320,330 and of the second diode
Second capacitor 340；It is in parallel with the second capacitor 340 after 4th full-control type module 310 and the positive concatenation of the 5th full-control type module 320,
5th full-control type module 320 is reversely concatenated with the second diode 330；
First full-control type module 110 and first diode 120 are in parallel with the second capacitor 340 after reversely concatenating, the 5th full control
Pattern block 320 and the second diode 330 are in parallel with first capacitor 230 after reversely concatenating；
The tie point of first full-control type module 110 and first diode 120 is as the first tie point, the second full-control type module
210 and third full-control type module 220 tie point as the second tie point, the first tie point and the second tie point are straight as having
Flow the output terminal of the converter power module of failure self-cleaning ability.
According to the converter power module for having DC Line Fault self-cleaning ability of aforementioned present invention, set in first order unit
Full-control type module and diode are set, full-control type module, diode and capacitor are set in second level unit, third level unit, in function
When rate module works normally, the on and off of full-control type module is controlled by control signal, can export the difference electricity of needs
Flat, fail lockout power module, power module only has the current path to capacitor charging, applies in inverter, when changing
When flowing the positive and negative extreme generation short trouble of device, as long as being latched all power modules simultaneously, because current path can only be to power mould
Capacitor charging in block, capacitance voltage increase, and block direct fault current to eliminate failure scratch start road to provide inverse electromotive force,
Realize the self-cleaning of Converter DC-side failure.
Further, first diode 120, the second diode 230 are the diodes of same type；240 He of first capacitor
Second capacitor 330 is also the capacitor of same type, can be, but not limited to be dry type metal oxide film capacitor, this capacitor has miscellaneous
It is low, corrosion-resistant to dissipate inductance, has the characteristics that self-healing ability, is suitble to the use occasion of inverter.
In one embodiment, as shown in Fig. 2, third level unit 300 be it is multiple, the in previous third level unit the 5th
It is in parallel with the second capacitor 340 in the latter third level unit after full-control type module 320 and the second diode 330 reversely concatenate；
After first full-control type module 110 and the reversed concatenation of first diode 120 simultaneously with the first capacitor 230 in the third level unit of stem
Connection, the 5th full-control type module 320 and the second diode 330 in the third level unit of tail portion reversely after concatenation with first capacitor
230 is in parallel.
In the present embodiment, third level unit is multiple, increases the quantity of full-control type module in power module, passes through control
The on and off of full-control type module processed charges and discharges multiple capacitors in power module, can export more not
Same level, to adapt to different level demands.
In one embodiment, third level unit is two.
In the present embodiment, third level unit is two, includes three capacitors in power module, can export four kinds of differences
Level.
In one embodiment, third level unit is three.
In the present embodiment, third level unit is three, includes four capacitors in power module, can export five kinds of differences
Level.
In one embodiment, the first full-control type module 110, the second full-control type module 210, third full-control type module 220,
4th full-control type module 310, the 5th full-control type module 320 include the wholly-controled device and third diode of reverse parallel connection.
In the present embodiment, full-control type module includes the wholly-controled device and third diode of reverse parallel connection, with such company
Relationship is connect, when power module is worked, different current paths can be provided, realize the charging of the capacitor in power module
And discharge process.
It should be noted that the three or two pole when full-control type module is reversely concatenated with other diodes, in full-control type module
Pipe is connect with other diode forwards, i.e., the positive of third diode connect with the cathode of other diodes, herein other two
Pole pipe is independent diode, i.e. the not diode in parallel with wholly-controled device；
Third diode in full-control type module can use external diode, can also be using built in wholly-controled device
Anti-paralleled diode.
In one embodiment, as shown in figure 3, the first full-control type module includes insulated gate bipolar transistor T1 and two poles
Pipe D1, the second full-control type module include insulated gate bipolar transistor T2 and diode D2, and third full-control type module includes insulation
Grid bipolar junction transistor T3 and diode D3, the 4th full-control type module include insulated gate bipolar transistor T4 and diode D4,
5th full-control type module includes insulated gate bipolar transistor T5 and diode D5；
The emitter of insulated gate bipolar transistor T1 connects with the cathode of the anode of diode D1, first diode respectively
It connects, the collector of insulated gate bipolar transistor T1 is connect with the cathode of diode D1, and the second capacitance connection is diode D1's
Between cathode and the anode of first diode；
The collector of insulated gate bipolar transistor T2 is connect with the cathode of the cathode of diode D2, diode D5 respectively,
The emitter of insulated gate bipolar transistor T2 respectively with the collector of insulated gate bipolar transistor T3, diode D2 just
Pole, diode D3 cathode connection, the emitter of insulated gate bipolar transistor T3 respectively with the anode of diode D3, the two or two
The anode connection of pole pipe, first capacitor are connected to the collector and insulated gate bipolar transistor of insulated gate bipolar transistor T2
Between the emitter of T3；
The collector of insulated gate bipolar transistor T4 is connect with the cathode of the cathode of diode D1, diode D4 respectively,
The emitter of the insulated gate bipolar transistor T4 anode with the collector of insulated gate bipolar transistor T5, diode D4 respectively
Connection, the collector of insulated gate bipolar transistor T5 are also connect with the cathode of diode D5, insulated gate bipolar transistor T5
Emitter connect respectively with the cathode of the anode of diode D5, the anode of first diode, the second diode.
In the present embodiment, wholly-controled device can be insulated gate bipolar transistor, double by triggering control insulated gate
The on and off state of bipolar transistor T1, T2, T3, T4, T5 can make power module be in different working conditions, with
Just different level, the U in Fig. 3 are exportedSMFor the output voltage of power module, iSMFor the operating current of power module.
In one embodiment, the parameter of each insulated gate bipolar transistor is identical, and the parameter of each diode is identical, each electricity
The parameter of appearance is identical.
In the present embodiment, the parameter of each insulated gate bipolar transistor is identical, and the parameter of each diode is identical, each capacitor
Parameter it is identical, convenient for Current Voltage of the control power module under different working condition.It should be noted that each diode packet
Include diode D1, D2, D3, D4, D5 and first diode, the second diode.
Specifically, as shown in figure 4, have the converter power module of DC Line Fault self-cleaning ability by first order unit,
Second level unit, third level unit are total to three parts composition, and the end a of first order unit is connected with the end a of third level unit, the first order
The end b of unit is connected with the end b of third level unit, and the end a of second level unit is connected with the end c of third level unit, and the second level is single
The end b of member is connected with the end d of third level unit, and the end c of first order unit and the end c of third level unit are the two of entire submodule
A output port.
(Insulated Gate Bipolar Transistor, insulated gate bipolar are brilliant by an IGBT for first order unit
Body pipe) and two diode compositions, wherein IGBT is T1, and two diodes are respectively D1, D11.By the anode of diode D1, two
The cathode of pole pipe D11, T1 three end of emitter be connected after the end c as first order unit；The cathode of diode D1 and the collection of T1
The end a after electrode is connected as first order unit, b end of the anode of diode D11 as first order unit.
Second level unit is made of two IGBT, two diodes and a capacitor, wherein IGBT be T2, T3, two two
Pole pipe is respectively D2, D3, D12, capacitor C1.As the after the anode of capacitor C1, the collector of T2 are connected with the cathode of D2
The end a of secondary unit is used as second level unit after the emitter of T2, the anode of D2, the collector of T3 are connected with the cathode of D3
The end c, as the end b for second level unit after the cathode of C1, the emitter of T3 are connected with the anode of D3.
Third level unit is made of two IGBT, three diodes and a capacitor, wherein IGBT be T4, T5, three two
Pole pipe is respectively D4, D5, capacitor C2.The third level is used as after the anode of capacitor C2, the collector of T4 are connected with the cathode of D4
The end a of unit, the c after the emitter of T4, the anode of D4, the collector of T5 are connected with the cathode of D5 as third level unit
End, as the end b for third level unit after the cathode of C2, the emitter of T5, the anode of D5 are connected with the cathode of D12, D12's
D end of the anode as third level unit.
The power module exportable three kinds of level, respectively 0, U when working normallyc、2Uc, the touching of IGBT under each working condition
Hair-like state is as shown in table 1：
1 three level submodule IBGT triggering state of table
Power module can make power module by the on and off state of triggering control insulated gate bipolar transistor
In different working conditions, there are three types of working conditions altogether for power module：
Working condition one：T1, T3, T5 conducting, T2, T4 cut-off.
Work as iSMWhen < 0, for current direction as shown in Fig. 5-a, electric current forms access, power list by T3, C1, T5, C2, T1
The voltage of member output is 2Uc, capacitor C1, C2 are in discharge condition.
Work as iSMWhen > 0, for current direction as shown in Fig. 5-b, electric current forms access, power list by D1, C2, D5, C1, D3
The voltage of member output is 2Uc, capacitor C1, C2 are in charged state.
Working condition two：T1, T2, T5 conducting, T3, T4 cut-off.
Work as iSMWhen < 0, for current direction as shown in Fig. 6-a, electric current forms access, power cell by D2, T5, C2, T1
The voltage of output is Uc, capacitor C2 is in discharge condition, and capacitor C1 is in bypass condition.
Work as iSMWhen > 0, for current direction as shown in Fig. 6-b, electric current forms access, power cell by D1, C2, D5, T2
The voltage of output is Uc, capacitor C2 is in charged state, and capacitor C1 is in bypass condition.
Working condition three：T1, T2, T4 conducting, T3, T5 cut-off.
Work as iSMWhen < 0, for current direction as shown in Fig. 7-a, electric current forms access, power cell output by D2, D4, T1
Voltage be 0, capacitor C is in bypass condition.
Work as iSMWhen > 0, for current direction as shown in Fig. 7-b, electric current forms access, power cell output by D1, T4, T2
Voltage 0, capacitor C is in bypass condition.
Working condition four：T1, T2, T3, T4, T5 are turned off.
Work as iSMWhen < 0, as shown in fig 8-a, electric current is formed logical current direction by D2, D4 and C2, C1 and D12, D11
Road, the voltage of power cell output are-Uc, capacitor C1, C2 are in charged state.
Work as iSMWhen > 0, for current direction as shown in Fig. 8-b, electric current forms access, power list by D1, C2, D5, C1, D3
The voltage of member output is 2Uc, capacitor C1, C2 are in charged state.
The converter power module for having DC Line Fault self-cleaning ability can be four level, five level and more with flexible expansion
The modular structure of more level need to only increase third level unit part therein on the basis of current block, four electricity after extension
It is flat, five level submodules are as shown in Figure 9 and Figure 10, four level after extension, under each working condition of five electrical level power modules
The triggering state of IGBT is as shown in table 2, table 3, current path such as Figure 11-of the corresponding five kinds of working conditions of four electrical level power modules
A, shown in 11-b, 12-a, 12-b, 13-a, 13-b, 14-a, 14-b, 15-a, 15-b.
2 four electrical level power module IBGT triggering state of table
3 five electrical level power module IBGT triggering state of table
According to the above-mentioned converter power module for having DC Line Fault self-cleaning ability, the present invention also provides a kind of changes of current
Device, just the embodiment of inverter of the invention is described in detail below.
It is shown in Figure 16, it is the structural schematic diagram of the inverter of one embodiment of the invention, the change of current in the embodiment
Device, including first group of change of current bridge arm and second group of change of current bridge arm；
The negative pole end of three-phase change of current bridge arm 410,420,430 in first group of change of current bridge arm passes through corresponding bridge arm reactor
It is connect with alternating current net side A, B, C；The positive terminal of three-phase change of current bridge arm 510,520,530 in second group of change of current bridge arm by pair
The bridge arm reactor answered is connect with alternating current net side A, B, C；
Any one phase change of current bridge arm in first group of change of current bridge arm and second group of change of current bridge arm includes several of concatenation
The above-mentioned converter power module for having DC Line Fault self-cleaning ability, the second tie point in previous power module is with after
The first tie point in one power module connects, and the first tie point after concatenation in the power module of stem is as change of current bridge arm
Positive terminal, negative pole end of second tie point as change of current bridge arm in the power module of tail portion.
In the present embodiment, by the above-mentioned converter power module application for having DC Line Fault self-cleaning ability in inverter
In, when inverter works normally, if when the positive and negative extreme generation short trouble of inverter, as long as being latched power module simultaneously,
Because current path can only increase the capacitor charging in power module, capacitance voltage, so that providing inverse electromotive force blocks direct current
Fault current eliminates failure scratch start road, realizes the self-cleaning of Converter DC-side failure.
It should be noted that the SM in Figure 16 indicates that the power module in converter bridge arm, m and n indicate serial number.
In one embodiment, as shown in figure 16, inverter further includes three charging resistors R1, R2, R3 and one group of three-phase
Disconnecting switch S1；
Three-phase isolation switch S1 is connected to the bridge arm reactor 412,422,432 and alternating current of corresponding first group of change of current bridge arm
Between net side A, B, C, meanwhile, three-phase isolation switch S1 be connected to corresponding second group of change of current bridge arm bridge arm reactor 512,522,
Between 532 and alternating current net side；The three-phase of three-phase isolation switch S1 is in parallel with three charging resistor R1, R2, R3 one-to-one correspondence.
In the present embodiment, three charging resistors are provided between bridge arm reactor and alternating current net side A, B, C three-phase
R1, R2, R3 and three-phase isolation switch S1.Inverter needs to carry out initialization charging before normal work, is kept apart by three-phase
The disconnection of S1 is closed, alternating current net side can be filled by all change of current bridge arms of three charging resistors R1, R2, R3 to inverter
Electricity.
Further, three charging resistor R1, R2, R3 parameters are identical.
The converter power module for having DC Line Fault self-cleaning ability can be applied in inverter, such as MMC inverter
Deng in specific application, full-control type wholly-controled device can not only use insulated gate bipolar transistor as switching device
IGBT, such as replace other wholly-controled devices (such as IEGT) and can also reach same purpose.Has direct current event using of the invention
The converter power module for hindering self-cleaning ability, can solve half-H-bridge type MMC inverter need to disconnect AC circuit breaker removing direct current
The defect of side failure, IGBT used are fewer than full H bridge type MMC inverter.With CDSM (Clamp Doulbe Sub-modular,
The double power modules of clamp) it compares, for three level submodules as CDSM component, average every level needs 2.5 IGBT (to contain instead simultaneously
Union II pole pipe) and 1 independent diode, but four level, five level and more high level power module are averaged needed for every level
IGBT is less, and economy is more excellent, and the power module of appropriate level can be selected according to actual demands of engineering, reduces power module number
Amount reduces power module voltage sorting time and control complexity.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (9)
1. a kind of converter power module for having DC Line Fault self-cleaning ability, which is characterized in that including first order unit,
Secondary unit and third level unit；
The first order unit includes the first full-control type module and first diode reversely concatenated；
The second level unit includes the second full-control type module, third full-control type module and first capacitor；Second full-control type
It is in parallel with the first capacitor after module and third full-control type module forward direction concatenation；
The third level unit includes the 4th full-control type module, the 5th full-control type module, the second diode and the second capacitor；It is described
, fiveth full-control type in parallel with second capacitor after 4th full-control type module and the 5th full-control type module forward direction concatenation
Module is reversely concatenated with second diode；
The first full-control type module and first diode are in parallel with second capacitor after reversely concatenating, the 5th full-control type
Module and second diode are in parallel with the first capacitor after reversely concatenating；
The tie point of the first full-control type module and the first diode is as the first tie point, the second full-control type mould
Block and the tie point of the third full-control type module are made as the second tie point, first tie point and second tie point
For the output terminal of the converter power module for having DC Line Fault self-cleaning ability.
2. the converter power module according to claim 1 for having DC Line Fault self-cleaning ability, which is characterized in that institute
State third level unit be it is multiple, after the 5th full-control type module and the second diode in previous third level unit reversely concatenate,
It is in parallel with the second capacitor in the latter third level unit；The first full-control type module and first diode reversely concatenate after with
First capacitor in the third level unit of stem is in parallel, the 5th full-control type module and described second in the third level unit of tail portion
Diode is in parallel with the first capacitor after reversely concatenating.
3. the converter power module according to claim 2 for having DC Line Fault self-cleaning ability, which is characterized in that institute
Stating third level unit is two.
4. the converter power module according to claim 2 for having DC Line Fault self-cleaning ability, which is characterized in that institute
Stating third level unit is three.
5. the converter power module as claimed in any of claims 1 to 4 for having DC Line Fault self-cleaning ability,
It is characterized in that, the first full-control type module, the second full-control type module, the third full-control type module, the described 4th
Full-control type module, the 5th full-control type module include the wholly-controled device and third diode of reverse parallel connection.
6. the converter power module according to claim 1 for having DC Line Fault self-cleaning ability, which is characterized in that institute
Stating the first full-control type module includes insulated gate bipolar transistor T1 and diode D1, and the second full-control type module includes insulation
Grid bipolar junction transistor T2 and diode D2, the third full-control type module include insulated gate bipolar transistor T3 and diode
D3, the 4th full-control type module include insulated gate bipolar transistor T4 and diode D4, the 5th full-control type module packet
Include insulated gate bipolar transistor T5 and diode D5；
The emitter of insulated gate bipolar transistor T1 connects with the cathode of positive, the described first diode of diode D1 respectively
It connects, the collector of insulated gate bipolar transistor T1 is connect with the cathode of diode D1, and second capacitance connection is in diode
Between the cathode of D1 and the anode of the first diode；
The collector of insulated gate bipolar transistor T2 is connect with the cathode of the cathode of diode D2, diode D5 respectively, insulation
The emitter of grid bipolar junction transistor T2 respectively with the collector of insulated gate bipolar transistor T3, the anode of diode D2, two
The cathode of pole pipe D3 connects, the emitter of insulated gate bipolar transistor T3 respectively with diode D3 the positive, described 2nd 2
The anode connection of pole pipe, the first capacitor are connected to the collector and insulated gate bipolar crystalline substance of insulated gate bipolar transistor T2
Between the emitter of body pipe T3；
The collector of insulated gate bipolar transistor T4 is connect with the cathode of the cathode of diode D1, diode D4 respectively, insulation
Anode of the emitter of grid bipolar junction transistor T4 respectively with the collector of insulated gate bipolar transistor T5, diode D4 connects
It connects, the collector of insulated gate bipolar transistor T5 is also connect with the cathode of diode D5, insulated gate bipolar transistor T5's
Emitter is connect with the cathode of positive, described second diode of positive, the described first diode of diode D5 respectively.
7. the converter power module according to claim 6 for having DC Line Fault self-cleaning ability, which is characterized in that each
The parameter of insulated gate bipolar transistor is identical, and the parameter of each diode is identical, and the parameter of each capacitor is identical.
8. a kind of inverter, which is characterized in that including first group of change of current bridge arm and second group of change of current bridge arm；
The negative pole end of three-phase change of current bridge arm in first group of change of current bridge arm passes through corresponding bridge arm reactor and AC network
Side connection；The positive terminal of three-phase change of current bridge arm in second group of change of current bridge arm passes through corresponding bridge arm reactor and alternating current
Net side connection；
Any one phase change of current bridge arm in first group of change of current bridge arm and second group of change of current bridge arm includes several of concatenation
The converter power module for having DC Line Fault self-cleaning ability as described in any one of claim 1 to 6, previous function
The second tie point in rate module is connect with the first tie point in the latter power module, after concatenation in the power module of stem
Positive terminal of first tie point as the change of current bridge arm, the second tie point in the power module of tail portion is as the change of current
The negative pole end of bridge arm.
9. inverter according to claim 8, which is characterized in that further include that three charging resistors and one group of three-phase are kept apart
It closes；
The three-phase isolation switch is connected between the bridge arm reactor and alternating current net side of corresponding first group of change of current bridge arm,
Meanwhile the three-phase isolation switch be connected to corresponding second group of change of current bridge arm bridge arm reactor and alternating current net side it
Between；The three-phase of the three-phase isolation switch is in parallel with three charging resistor one-to-one correspondence.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810969174.7A CN108900103A (en) | 2018-08-23 | 2018-08-23 | The converter power module and inverter for having DC Line Fault self-cleaning ability |
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| CN201810969174.7A CN108900103A (en) | 2018-08-23 | 2018-08-23 | The converter power module and inverter for having DC Line Fault self-cleaning ability |
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| CN112350603A (en) * | 2020-10-29 | 2021-02-09 | 四川大学 | Improved capacitive MMC (modular multilevel converter) topological structure with direct-current fault self-clearing capability |
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