CN107086806A - A kind of AuCT and its control method - Google Patents
A kind of AuCT and its control method Download PDFInfo
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- CN107086806A CN107086806A CN201710347772.6A CN201710347772A CN107086806A CN 107086806 A CN107086806 A CN 107086806A CN 201710347772 A CN201710347772 A CN 201710347772A CN 107086806 A CN107086806 A CN 107086806A
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- 238000002955 isolation Methods 0.000 claims abstract description 28
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- 230000005611 electricity Effects 0.000 claims description 25
- 238000012937 correction Methods 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 238000011068 loading method Methods 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 14
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- 230000033228 biological regulation Effects 0.000 description 8
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Classifications
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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
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
- H02M3/3381—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement using a single commutation path
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a kind of AuCT and its control method.The AuCT isolates DC/DC current transformers, three-phase inversion unit, output filter unit and external output control unit with precharge unit, input filter unit, prime boosting unit, intermediate frequency including input switch；The input switch includes two pre-charge resistances with precharge unit, and described two pre-charge resistances are in series or in parallel；Prime boosting unit includes two-way boost boost modules, and the two-way boost boost modules are in series or in parallel；Intermediate frequency isolation DC/DC current transformers are two, the two-way boost boost modules are connected respectively, for carrying out medium frequency inverter to the DC voltage that the two-way boost boost modules are exported respectively, generate the square-wave voltage of intermediate frequency, and be middle dc voltage to rectification after the square-wave voltage progress isolation transformation of intermediate frequency, input the three-phase inversion unit after the middle dc voltage of two intermediate frequencies isolation DC/DC current transformers outputs is in parallel.
Description
Technical field
The present invention relates to rail transportation vehicle-mounted apparatus field, more particularly to a kind of subway AuCT and its controlling party
Method.
Background technology
AuCT is the important mobile unit of rail vehicle, can be the threephase loads such as whole-vehicle air-conditioner, air compressor
AC power is provided with part single-phase load.Using Industrial Frequency Transformer isolation and hard switching intermediate frequency transformation more than traditional AuCT
The mode of device isolation.DC inverter into after three-phase alternating current, three-phase work is converted to by Industrial Frequency Transformer by power frequency isolation method
Frequency power is exported, and because Industrial Frequency Transformer working frequency is relatively low, the usual volume weight of such transformer is larger.
In addition, current subway power supply standard mainly has two kinds of direct current 750V and 1500V, due to power supply mode amplitude
Difference is larger, and existing subway AuCT major loop topology design and parts selection are usually applicable only to a certain power supply system.
It should be noted that the introduction of technical background is intended merely to above it is convenient technical scheme is carried out it is clear,
Complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Can not be merely because these schemes be the present invention's
Background section is set forth and thinks that above-mentioned technical proposal is known to those skilled in the art.
The content of the invention
In order to flexibly tackle power supply mode, the embodiment of the present invention provides a kind of AuCT and its control method.
In order to achieve the above object, the embodiment of the present invention provides a kind of AuCT, including input switch and precharge
Unit, input filter unit, prime boosting unit, intermediate frequency isolation DC/DC current transformers, three-phase inversion unit, output filter unit
And external output control unit；The input switch is connected high voltage dc bus with precharge unit, for DC support
Electric capacity enters line precharge；The input switch includes two pre-charge resistances, described two pre-charge resistances with precharge unit
It is in series or in parallel；The input filter unit, connects the input switch and precharge unit, for filtering out direct current input
Harmonic wave and common mode disturbances；The prime boosting unit connects the input filter unit, for exporting desired DC voltage；Institute
Stating prime boosting unit includes two-way boost boost modules, and the two-way boost boost modules are in series or in parallel；In described
Frequency isolation DC/DC current transformers are two, the two-way boost boost modules are connected respectively, for respectively to the two-way boost
The DC voltage of boost module output carries out medium frequency inverter, generates the square-wave voltage of intermediate frequency, and to the square-wave voltage of the intermediate frequency
It is middle dc voltage to carry out rectification after isolation transformation, and the middle dc voltage of two intermediate frequency isolation DC/DC current transformer outputs is simultaneously
The three-phase inversion unit is inputted after connection；The three-phase inversion unit connects described two intermediate frequency isolation DC/DC current transformers, is used for
It is three-phase main-frequency alternating current by the middle dc voltage inversion after parallel connection；The output filter unit connects the three-phase inversion list
Member, for being filtered to the three-phase main-frequency alternating current；The external output control unit connects the output filter unit,
For controlling and the filtered three-phase main-frequency being exchanged into electricity output to external loading.
Further, in one embodiment, the input switch and precharge unit include main contactor, by-pass switch and
Described two pre-charge resistances；The main contactor is used for the high pressure being switched on or switched off on the high voltage dc bus, described two
Individual pre-charge resistance is used to enter DC support electric capacity line precharge, and the by-pass switch is carried out with described two pre-charge resistances
Parallel connection, for bypassing described two pre-charge resistances after the completion of precharge.
Further, in one embodiment, the input filter unit includes positive and negative dc bus filter inductance, positive and negative mother
RC series arms in parallel between line, and the boost function inductance by being multiplexed in the prime boosting unit, form LCL filtering
Device.
Further, in one embodiment, the prime boosting unit includes the two-way boost boost modules, described
It is made up of per boost boost modules all the way boost function inductance, diode, IGBT and DC capacitor, for maintaining output to expect
DC voltage.
Further, in one embodiment, each intermediate frequency isolation DC/DC current transformers include a LLC medium frequency inverter lists
Member and a uncontrollable rectifier unit；The LLC medium frequency inverters unit includes single-phase inversion unit, resonant capacitor group and intermediate frequency transformation
Device；The single-phase inversion unit is connected with the boost boost modules, for the direct current exported to the boost boost modules
Voltage carries out medium frequency inverter, generates the square-wave voltage of intermediate frequency；The resonant capacitor group and the intermediate-frequency transformer primary side leakage inductance
LLC series resonant tanks are constituted with magnetizing inductance, the intermediate-frequency transformer carries out transformation processing to the square-wave voltage of the intermediate frequency,
And realize electrical isolation；The uncontrollable rectifier unit includes diode rectifier bridge and capacitor bank；The diode rectifier bridge is defeated
Enter and be connected with the intermediate-frequency transformer secondary, output is connected with the three-phase inversion unit, for by the intermediate-frequency transformer pair
The square-wave voltage rectification on side is the middle dc voltage；The capacitor bank and the output-parallel of the diode rectifier bridge,
For eliminating the influence that circuit stray parameter is controlled LLC.
Further, in one embodiment, the three-phase inversion unit includes low-voltage direct Support Capacitor and three-phase inversion
Device；The DC inverter that the three-phase inverter is used to export the uncontrollable rectifier unit is three-phase main-frequency alternating current, output
To the output filter unit；The low-voltage direct Support Capacitor is used for the input voltage for stablizing the three-phase inverter.
Further, in one embodiment, the output filter unit includes three-phase alternating current inductance and three-phase alternating current electric capacity,
For being filtered to the three-phase main-frequency alternating current that the three-phase inverter is exported.
Further, in one embodiment, the external output control unit includes three-phase output contactor and storehouse electricity consumption
Pre-charge circuit；The three-phase output contactor connects the output filter unit, auxiliary for being controlled under accidental conditions
The load of current transformer is helped to be switched on or switched off；The storehouse electricity consumption pre-charge circuit is used in external storehouse electricity consumption operating mode, passes through institute
The anti-paralleled diode for stating three-phase inverter enters to close institute after the completion of line precharge, precharge to the low-voltage direct Support Capacitor
Three-phase output contactor is stated, is that charger is powered.
Further, in one embodiment, when power supply system is 1500V, described two pre-charge resistance series connection, to institute
State DC support electric capacity and enter line precharge；
Two boost boost modules series connection of the prime boosting unit, and every boost boost modules connection one
Intermediate frequency isolates DC/DC current transformers.
Further, in one embodiment, when power supply system is 750V, described two pre-charge resistances are in parallel, to institute
State DC support electric capacity and enter line precharge；
Two boost boost modules of the prime boosting unit are in parallel, and every boost boost modules connection one
Intermediate frequency isolates DC/DC current transformers.
In order to achieve the above object, the embodiment of the present invention also provides a kind of controlling party to AuCT described above
Method, including：Using low-voltage direct busbar voltage as object is stablized, its set-point subtracts the difference of actual value, inputs to the first regulation
Device, the output of adjuster is used as the first prime boosting unit and the set-point of the output voltage sum of the second prime boosting unit；
The set-point of the output voltage sum of the first prime boosting unit and the second prime boosting unit subtracts the difference of actual value
Input to the second adjuster, the output of second adjuster as prime boosting unit input current set-point；Before described
The set-point of level boosting unit input current subtracts the difference of actual value, inputs to the 3rd adjuster, the 3rd adjuster
Export the set-point as the prime boosting unit dutycycle；First prime boosting unit and the second prime boosting unit it is defeated
Go out the difference that average voltage subtracts the output voltage of the first prime boosting unit, the 4th adjuster is inputed to, by amplitude limit
Afterwards, it is output as dutycycle correction value；The set-point of the prime boosting unit dutycycle subtracts the dutycycle amendment and is worth to
The dutycycle of the first prime boosting unit；The set-point of the prime boosting unit dutycycle adds the dutycycle amendment
It is worth to the dutycycle of the second prime boosting unit.
In order to achieve the above object, the embodiment of the present invention also provides a kind of controlling party to AuCT described above
Method, including：Using low-voltage direct busbar voltage as object is stablized, its set-point subtracts the difference of actual value, inputs to the first regulation
Device, is used as prime boosting unit output voltage set-point；The input electricity of first prime boosting unit and the second prime boosting unit
Levelling average subtracts the difference of the first prime boosting unit input current, inputs to the second adjuster, after amplitude limit, output
For prime boosting unit output voltage correction value；The prime boosting unit output voltage set-point boosts single plus the prime
First output voltage correction value, obtains the first prime boosting unit output voltage set-point；The prime boosting unit output
Voltage set-point subtracts the prime boosting unit output voltage correction value, obtains the second prime boosting unit output voltage
Set-point；The first prime boosting unit output voltage set-point subtracts the difference of actual value, inputs to the 3rd adjuster, institute
The output for stating the 3rd adjuster is used as the set-point of the first prime boosting unit input current；The second prime boosting is single
First output voltage set-point subtracts the difference of actual value, inputs to the 4th adjuster, and the output of the 4th adjuster is used as institute
State the set-point of the second prime boosting unit input current；The set-point of the first prime boosting unit input current subtracts reality
The difference of actual value, inputs to the 5th adjuster, and the output of the 5th adjuster is used as the first prime boosting unit dutycycle
Set-point；The set-point of the second prime boosting unit input current subtracts the difference of actual value, inputs to the 6th adjuster,
The output of 6th adjuster as the second prime boosting unit dutycycle set-point.
Having the beneficial effect that produced by the AuCT and its control method of the embodiment of the present invention：The present invention is only by changing
1500V and 750V power supply modes can flexibly be tackled by becoming the series parallel structure of pre-charge resistance and prime boosting unit；It is logical
The cooperation control of prime boosting unit and intermediate frequency DCDC current transformers is crossed, stream during two sets of circuit input parallel connections is realized so that
Two sets of circuits being capable of power-sharing；Controlled by the cooperation of prime boosting unit and intermediate frequency DC/DC current transformers, realize two sets of electricity
Pressure during the input series connection of road so that two sets of circuits are all operated in safe voltage range；By active control, nothing is realized
Many AuCT parallel functions of transformer isolation.
With reference to explanation hereinafter and accompanying drawing, only certain exemplary embodiments of this invention is disclose in detail, the original of the present invention is specified
Reason can be in adopted mode.It should be understood that embodiments of the present invention are not so limited in scope.In appended power
In the range of the spirit and terms that profit is required, embodiments of the present invention include many changes, modifications and equivalent.
The feature for describing and/or showing for a kind of embodiment can be in same or similar mode one or more
Used in individual other embodiment, it is combined with feature in other embodiment, or substitute the feature in other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when being used herein, but simultaneously
It is not excluded for the presence or additional of one or more further features, one integral piece, step or component.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those skilled in the art, without having to pay creative labor, can be with root
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the AuCT of the reply direct current 1500V power supply systems of one embodiment of the invention；
Fig. 2 is the structural representation of the AuCT of the reply direct current 750V power supply systems of one embodiment of the invention；
Fig. 3 is the structural representation of the AuCT of the reply direct current 1500V power supply systems of another embodiment of the present invention；
Fig. 4 is the structural representation of the AuCT of the reply direct current 750V power supply systems of another embodiment of the present invention；
Fig. 5 is the particular circuit configurations of the AuCT of the reply direct current 1500V power supply systems of one embodiment of the invention
Figure；
Fig. 6 is the particular circuit configurations of the AuCT of the reply direct current 750V power supply systems of one embodiment of the invention
Figure；
Fig. 7 is the control algolithm schematic diagram of the reply direct current 1500V power supply systems of the embodiment of the present invention；
Fig. 8 is the control algolithm schematic diagram of the reply direct current 750V power supply systems of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Art technology technical staff knows, embodiments of the present invention can be implemented as a kind of system, device, equipment,
Method or computer program product.Therefore, the disclosure can be implemented as following form, i.e.,：It is complete hardware, complete soft
Part (including firmware, resident software, microcode etc.), or the form that hardware and software is combined.
Below with reference to the principle and spirit of some representative embodiments of the present invention, in detail the explaination present invention.
It is an object of the invention to tied for the not enough of existing AuCT there is provided a kind of using new major loop topology
The AuCT of structure and new control method, to realize small-sized subway AuCT, light weight and efficient purpose, meanwhile,
The AuCT of the present invention can tackle the larger different power supply systems of difference in magnitude, such as existing subway power supply standard is straight
Flow 750V and direct current 1500V.But, the invention is not restricted to both power supply systems, as long as pass through the auxiliary converter of the present invention
The different size for the power supply system that device structure and control method can be reached, within protection scope of the present invention.
Following examples pass through AuCT and controlling party of direct current 750V and the 1500V power supply mode to the present invention
Method is described.
Fig. 1 and Fig. 2 is the structural representation of the AuCT of a variety of power supply systems of adaptation of the embodiment of the present invention.Its
In, Fig. 1 is the structural representation of the AuCT of reply 1500V power supply systems, and Fig. 2 is the auxiliary of reply 720V power supply systems
The structural representation of current transformer.As depicted in figs. 1 and 2, the AuCT of the present embodiment includes：Input switch is single with precharge
Member, input filter unit, prime boosting unit, intermediate frequency isolation DC/DC current transformers, three-phase inversion unit, output filter unit with
And external output control unit.
The input switch is connected high voltage dc bus with precharge unit, for carrying out preliminary filling to DC support electric capacity
Electricity；The input switch includes two pre-charge resistances with precharge unit, and described two pre-charge resistances are in series or in parallel,
When power supply system is 1500V, shown in corresponding diagram 1, two pre-charge resistance series connection, when power supply system is 750V, corresponding diagram 2
It is shown, two pre-charge resistance parallel connections；The input filter unit, connects the input switch and precharge unit, for filtering
The harmonic wave and common mode disturbances inputted except direct current；The prime boosting unit connects the input filter unit, expects for exporting
DC voltage；The prime boosting unit includes two-way boost boost modules, two-way boost boost modules series connection or
Person is in parallel.When power supply system is 1500V, shown in corresponding diagram 1, two-way boost boost modules series connection, when power supply system is 750V
When, shown in corresponding diagram 2, two-way boost boost modules are in parallel；The intermediate frequency isolation DC/DC current transformers are two, and institute is connected respectively
Two-way boost boost modules are stated, it is inverse to carry out intermediate frequency to the DC voltage that the two-way boost boost modules are exported for respectively
Become, generate the square-wave voltage of intermediate frequency, and be middle dc voltage to rectification after the square-wave voltage progress isolation transformation of the intermediate frequency,
The three-phase inversion unit is inputted after the middle dc voltage of two intermediate frequency isolation DC/DC current transformer outputs is in parallel；The three-phase
Inversion unit connects described two intermediate frequency isolation DC/DC current transformers, for being three-phase by the middle dc voltage inversion after parallel connection
Industrial-frequency alternating current；The output filter unit connects the three-phase inversion unit, for being carried out to the three-phase main-frequency alternating current
Filtering；The external output control unit connects the output filter unit, for controlling and by the filtered three-phase work
Frequency exchange electricity output is to external loading.
Each building block of the AuCT of a variety of power supply systems of adaptation of the present embodiment is introduced individually below.
1. input switch and precharge unit, it includes：Main contactor, by-pass switch and two pre-charge resistances, it is described
Main contactor is used to be switched on or switched off high pressure, the pre-charge resistance using series connection and parallel way tackle respectively 1500V and
Enter line precharge under 750V power supply systems to DC support electric capacity, the by-pass switch bypasses precharge electricity after the completion of precharge
Resistance.When power supply system is 1500V, shown in corresponding diagram 1, two pre-charge resistance series connection, when power supply system is 750V, correspondence
Shown in Fig. 2, two pre-charge resistance parallel connections.
2. input filter unit, input is connected with train high voltage dc bus, it is made up of inductance, electric capacity, resistance；Output
End is connected with prime boosting unit, the harmonic component for filtering out contact net side.
3. prime boosting unit, it includes：Function inductance, two-way boost modules, each two sets of DC support electric capacity, two-way
Boost modules tackle 1500V and 750V power supply systems respectively using series connection and parallel way, maintain output to expect DC voltage；
And by adjusting the dutycycle of switching tube in boost modules, realize that the output of two sets of prime boosting units under 1500V standards is equal
Pressure, realizes that the input of two sets of prime boosting units under 750V standards is flowed.
4. intermediate frequency isolate DC/DC current transformers, it include single-phase inversion unit, intermediate-frequency transformer and resonant element, do not control it is whole
Flow each two sets of unit.Two single-phase inversion units are connected with two sets of boost modules respectively, and carry out medium frequency inverter.The intermediate frequency
For power frequency 50Hz, its working frequency, according to the ability of critical piece, can generally may be used in the range of 5kHz~100kHz
It is set in the range of 18kHz~25kHz.
The intermediate-frequency transformer and resonant element, resonant element include resonant capacitor and necessary resonant inductance, resonance
Inductance can be integrated into intermediate-frequency transformer.Resonant capacitor and the intermediate-frequency transformer primary side leakage inductance and magnetizing inductance composition LLC
Series resonant tank, the intermediate-frequency transformer completes former secondary transformation function, and plays electrical isolation effect；
Uncontrollable rectifier unit, including two sets of diode rectifier bridges and a set of capacitor bank, the input of two sets of rectifier bridges respectively with
Transformer secondary is connected, and output-parallel is connected with rear class three-phase inversion unit, and the rectifier bridge is used for transformer secondary square wave
Voltage commutation is the voltage of low-voltage direct bus, and the capacitor bank is used to eliminate the influence that line inductance controls LLC.
4. three-phase inversion unit, including low-voltage direct Support Capacitor group and three-phase inverter, input and uncontrollable rectifier unit
It is connected, output is connected with output filter unit, it is three-phase main-frequency alternating current that the three-phase inversion unit, which is used for DC inverter,
The low-voltage direct Support Capacitor group is used to stablize inverter input voltage；
5. filter unit is exported, including three pole reactor, three phase capacitance and electric capacity discharge resistance, for defeated to three-phase inverter
Go out voltage to be filtered；
6. external output control unit, including three-phase output contactor and storehouse electricity consumption pre-charge circuit, the three-phase output
Contactor is used to be switched on or switched off AuCT load, and the storehouse electricity consumption pre-charge circuit is used in external storehouse electricity consumption operating mode
DC capacitor is charged by three-phase inverter uncontrollable rectifier, the convenient debugging of charger work is available for.
Fig. 3 and Fig. 4 is the structure of a specific embodiment of the AuCT for corresponding to 1500V and 750V power supply systems respectively
Schematic diagram.Fig. 5 and Fig. 6 is the physical circuit figure for the AuCT for corresponding to 1500V and 750V power supply systems respectively.With reference to
Fig. 3, Fig. 4, Fig. 5 and Fig. 6, the AuCT embodiment of the present embodiment are as follows：
1. contact net voltage enters line precharge, pre-charge resistance to DC capacitor by input switch and pre-charge circuit 2
There are two (resistant series and effect in parallel are reached with an ohmmeter in Fig. 3 and Fig. 4), wherein two under 1500V power supply systems
Under individual resistant series, 750V power supply systems, two resistor coupled in parallel；After the completion of precharge, by-pass switch closure, pre-charge process knot
Beam.
2. contact net voltage is entered by input filter unit 1 after input switch and pre-charge circuit 2, has filtered out and connect
A large amount of harmonic waves and common mode disturbances in net-fault.
3. filtered voltage is connected with prime boosting unit 1 and prime boosting unit 2, prime boosting unit includes two sets
Boost modules 3, can be single channel boost circuits per set of modules, can be also made up of two-way boost parallel connections；In 1500V power supply systems
Under, as shown in figure 5, two sets of boost block coupled in series operations, share One function inductance, under 750V power supply systems, such as Fig. 6 institutes
Show, two sets of boost wired in parallel operations, and 180 ° of misphase, respectively use One function inductance；Regardless of pattern, no matter and connect
How net-fault voltage fluctuates, and boost circuits export two-way galvanic current pressure two sets of intermediate frequency DC/DC units of supply.
4.Boost circuit outputs connection full-bridge LLC resonant transformations unit 4, two of which series resonance inductor multiplexing intermediate frequency
The primary side leakage inductance and magnetizing inductance of transformer 5, pass through the cooperation of single-phase inversion module switch frequency and two resonant frequencies so that
Transformer primary side inverter circuit is operated in Zero-voltage soft switch state, and the diode rectifier bridge 6 of transformer secondary is operated in zero electricity
Current soft-switch state, system effectiveness is improved while voltage conversion is completed.
Part before three-phase inverter 8, its control targe is：The voltage of stabilizing low voltage DC support electric capacity 12, and protect
The higher conversion efficiency of card.To realize this target, the thinking that controls taken is：By changing accounting for for the switching tube of boost modules 3
Sky is than realizing the control to target voltage, and LLC parts ensure the high efficiency of conversion using relatively-stationary on-off mode.
In order to tackle 1500V power supply systems, it need to implement voltage-controlled to two sets of prime boosting units and intermediate frequency DC/DC units
System.As shown in figure 5, the control mode used for：
Using the voltage close loop of low-voltage direct Support Capacitor 12 as control outer shroud, it exports the electricity of the voltage capacitance 14 and 15 in
Sum instruction is pressed, the output of medium voltage ring is used for adjusting the electric current of input inductance 16, and current inner loop is exported as at the beginning of switching tube
Walk dutycycle.It is in order to ensure to press, the voltage difference of middle voltage capacitance 14 and 15 is micro- by obtaining dutycycle after adjuster and amplitude limit
Tone pitch, the preliminary dutycycle of switching tube is individually subtracted and plus duty cycle trimmer value, two sets of boost switch orders up and down are used as.
After ensureing that electric capacity 14 and 15 press, it can also tackle that hardware is inconsistent to be brought by a small range adjustment LLC reverse frequencies
Rear class inequality flow problem.Above-mentioned adjuster can be as needed using P regulations, PI regulations or PID regulations.
The control algolithm principle implemented is as shown in Figure 7：
Using low-voltage direct busbar voltage as object is stablized, its set-point subtracts the difference of actual value, inputs to adjuster, adjusts
The output of section device is used as " the output voltage sum of prime boosting unit 1 and prime boosting unit 2 " set-point；
The difference that " the output voltage sum of prime boosting unit 1 and prime boosting unit 2 " set-point subtracts actual value is defeated
Enter to adjuster, the output of adjuster as " prime boosting unit input current " set-point；
The set-point of " prime boosting unit input current " subtracts the difference of actual value, inputs to adjuster, adjuster
Export the set-point as " prime boosting unit dutycycle "；
In order to ensure to press, it is aided with the voltage difference of middle voltage capacitance 14 and 15 to finely tune the dutycycle of two sets of boost circuits：
" prime boosting unit 1 and the output voltage average value of prime boosting unit 2 " subtracts that " prime boosting unit 1 exports electricity
The difference of pressure ", inputs to adjuster, after amplitude limit, is output as " dutycycle correction value "；
" prime boosting unit dutycycle " subtracts " dutycycle correction value " and obtains " dutycycle of prime boosting unit 1 ",
" prime boosting unit dutycycle " adds " dutycycle correction value " and obtained " dutycycle of prime boosting unit 2 ".
After ensureing that prime boosting unit 1 and prime boosting unit 2 are pressed, also LLC inversions can be adjusted by a small range
Frequency tackles the uneven flow problem of the inconsistent rear class brought of hardware.
By above-mentioned control, the stabilization of low-voltage direct busbar voltage had both been ensure that, the equal of two sets of parallel circuits is realized again
Voltage-controlled system.
In order to tackle 750V power supply systems, sharing control need to be implemented to two sets of prime boosting units and intermediate frequency DC/DC units.
As shown in fig. 6, the control mode used for：
Using the voltage close loop of low-voltage direct Support Capacitor 12 as control outer shroud, the middle electricity of straightening stream Support Capacitor 14 and 15 is obtained
The preliminary instruction of pressure.To ensure to flow effect, with the input inductance 16 of booster circuit and the current differential of input inductance 17, pass through
The trim values of the voltage instruction of electric capacity 14 and 15 are obtained after adjuster and amplitude limit, the voltage instruction of final electric capacity 14 and electric capacity 15 is first
Step instruction adds and subtracted trim values.The voltage close loop output of electric capacity 14 and 15 is instructed as input current, then by electric current
Ring finally gives switching tube pulse signal.Above-mentioned adjuster can be as needed using P regulations, PI regulations or PID regulations.
The control algolithm principle implemented is as shown in Figure 8：
Using low-voltage direct busbar voltage as object is stablized, its set-point subtracts the difference of actual value, inputs to adjuster, makees
For " prime boosting unit output voltage set-point "；
" prime boosting unit 1 and the input current average value of prime boosting unit 2 " subtracts that " prime boosting unit 1 inputs electricity
The difference of stream ", inputs to adjuster, after amplitude limit, is output as " prime boosting unit output voltage correction value "；
" prime boosting unit output voltage set-point " adds " prime boosting unit output voltage correction value ", obtains " preceding
Level boosting unit 1 output voltage set-point "；
" prime boosting unit output voltage set-point " subtracts " prime boosting unit output voltage correction value ", obtains " preceding
Level boosting unit 2 output voltage set-point "；
" output voltage of prime boosting unit 1 " set-point subtracts the difference of actual value, inputs to adjuster, adjuster it is defeated
Go out the set-point as " input current of prime boosting unit 1 "；
" output voltage of prime boosting unit 2 " set-point subtracts the difference of actual value, inputs to adjuster, adjuster it is defeated
Go out the set-point as " input current of prime boosting unit 2 "；
" input current of prime boosting unit 1 " set-point subtracts the difference of actual value, inputs to adjuster, adjuster it is defeated
Go out the set-point as " dutycycle of prime boosting unit 1 "；
" input current of prime boosting unit 2 " set-point subtracts the difference of actual value, inputs to adjuster, adjuster it is defeated
Go out the set-point as " dutycycle of prime boosting unit 2 ".
By above-mentioned control, the stabilization of medium-frequency transformation unit output voltage had both been ensure that, two sets of parallel circuits are realized again
Sharing control.
It is three-phase main-frequency alternating current through the inversion of three-phase inverter 8 5. diode rectifier bridge exports DC voltage.Three-phase inversion
Device possesses arcless breaking control function, adjusted according to bearing power in the margin of tolerance three-phase main-frequency alternating current amplitude and
Frequency, it is ensured that permutation Parallel sets power-balance.
6. three-phase inverter output is connected after being filtered through sinusoidal filter 9 with output contactor 10.Output contactor has two
Individual effect：The connecting and disconnecting of load are controlled under accidental conditions；Under external storehouse electricity consumption operating mode, storehouse electricity consumption first passes through output
The pre-charge circuit 11 at end, charges by three-phase inverter anti-paralleled diode to low-voltage direct Support Capacitor 12, charging complete
Afterwards, output contactor 10 is closed, and output end pre-charge contactor 11 disconnects, and storehouse electricity consumption is anti-through output contactor 10 and inverter
Parallel diode is powered to DC link, be can be supplied to charger 13 and is worked, and is easy to debug in Ku Nei or station.
Having the beneficial effect that produced by the AuCT and its control method of the embodiment of the present invention：
1. the present invention only can be tackled flexibly by changing the series parallel structure of pre-charge resistance and prime boosting unit
1500V and 750V power supply modes；
2. the present invention is controlled by the cooperation of prime boosting unit and intermediate frequency DCDC current transformers, two sets of circuit inputs are realized
Stream when in parallel so that two sets of circuits being capable of power-sharing；
3. the present invention is controlled by the cooperation of prime boosting unit and intermediate frequency DC/DC current transformers, two sets of circuits are realized defeated
Enter pressure when connecting so that two sets of circuits are all operated in safe voltage range；
4. the present invention realizes many AuCT parallel functions of transless isolation by active control.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can be using the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the present invention can be used in one or more computers for wherein including computer usable program code
The computer program production that usable storage medium is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Figure and/or block diagram are described.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which is produced, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that in meter
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, thus in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
Apply specific embodiment in the present invention to be set forth the principle and embodiment of the present invention, above example
Explanation be only intended to help to understand the method and its core concept of the present invention；Simultaneously for those of ordinary skill in the art,
According to the thought of the present invention, it will change in specific embodiments and applications, in summary, in this specification
Appearance should not be construed as limiting the invention.
Claims (12)
1. a kind of AuCT, it is characterised in that including input switch and precharge unit, input filter unit, prime liter
Press unit, intermediate frequency isolation DC/DC current transformers, three-phase inversion unit, output filter unit and external output control unit；
The input switch is connected high voltage dc bus with precharge unit, for entering line precharge to DC support electric capacity；Institute
State input switch and include two pre-charge resistances with precharge unit, described two pre-charge resistances are in series or in parallel；
The input filter unit, connects the input switch and precharge unit, for filtering out the harmonic wave of direct current input and being total to
Mould is disturbed；
The prime boosting unit connects the input filter unit, for exporting desired DC voltage；The prime boosting
Unit includes two-way boost boost modules, and the two-way boost boost modules are in series or in parallel；
The intermediate frequency isolation DC/DC current transformers are two, the two-way boost boost modules are connected respectively, for respectively to institute
The DC voltage for stating the output of two-way boost boost modules carries out medium frequency inverter, generates the square-wave voltage of intermediate frequency, and to the intermediate frequency
Square-wave voltage to carry out rectification after isolation transformation be middle dc voltage, the centre of two intermediate frequencies isolation DC/DC current transformer outputs
The three-phase inversion unit is inputted after DC voltage is in parallel；
The three-phase inversion unit connects described two intermediate frequency isolation DC/DC current transformers, for the intermediate dc after parallel connection is electric
Pressure inversion is three-phase main-frequency alternating current；
The output filter unit connects the three-phase inversion unit, for being filtered to the three-phase main-frequency alternating current；
The external output control unit connects the output filter unit, for controlling and by the filtered three-phase main-frequency
Electricity output is exchanged to external loading.
2. AuCT according to claim 1, it is characterised in that the input switch includes master with precharge unit
Contactor, by-pass switch and described two pre-charge resistances；
The main contactor is used for the high pressure being switched on or switched off on the high voltage dc bus, and described two pre-charge resistances are used for
Enter line precharge to DC support electric capacity, the by-pass switch is in parallel with the progress of described two pre-charge resistances, in preliminary filling
Described two pre-charge resistances are bypassed after the completion of electricity.
3. AuCT according to claim 1, it is characterised in that it is female that the input filter unit includes positive and negative direct current
RC series arms in parallel between line filter inductance, positive and negative busbar, and the boost function by being multiplexed in the prime boosting unit
Inductance, forms LCL filter.
4. AuCT according to claim 1, it is characterised in that the prime boosting unit includes the two-way
Boost boost modules, every boost boost modules all the way are by boost function inductance, diode, IGBT and DC capacitor structure
Into for maintaining the desired DC voltage of output.
5. AuCT according to claim 4, it is characterised in that each intermediate frequency isolation DC/DC current transformer bags
Include a LLC medium frequency inverters unit and a uncontrollable rectifier unit；
The LLC medium frequency inverters unit includes single-phase inversion unit, resonant capacitor group and intermediate-frequency transformer；
The single-phase inversion unit is connected with the boost boost modules, for the direct current exported to the boost boost modules
Voltage carries out medium frequency inverter, generates the square-wave voltage of intermediate frequency；
The resonant capacitor group and the intermediate-frequency transformer primary side leakage inductance and magnetizing inductance composition LLC series resonant tanks, institute
State intermediate-frequency transformer and transformation processing is carried out to the square-wave voltage of the intermediate frequency, and realize electrical isolation；
The uncontrollable rectifier unit includes diode rectifier bridge and capacitor bank；
The diode rectifier bridge input is connected with the intermediate-frequency transformer secondary, and output is connected with the three-phase inversion unit,
For being the middle dc voltage by the square-wave voltage rectification of the intermediate-frequency transformer secondary；
The capacitor bank and the output-parallel of the diode rectifier bridge, are controlled LLC for eliminating circuit stray parameter
Influence.
6. AuCT according to claim 1, it is characterised in that the three-phase inversion unit includes low-voltage direct branch
Support electric capacity and three-phase inverter；
The DC inverter that the three-phase inverter is used to export the uncontrollable rectifier unit is three-phase main-frequency alternating current, output
To the output filter unit；
The low-voltage direct Support Capacitor is used for the input voltage for stablizing the three-phase inverter.
7. AuCT according to claim 6, it is characterised in that the output filter unit includes three-phase alternating current
Sense and three-phase alternating current electric capacity, for being filtered to the three-phase main-frequency alternating current that the three-phase inverter is exported.
8. AuCT according to claim 6, it is characterised in that it is defeated that the external output control unit includes three-phase
Go out contactor and storehouse electricity consumption pre-charge circuit；
The three-phase output contactor connects the output filter unit, for controlling AuCT under accidental conditions
Load be switched on or switched off；
The storehouse electricity consumption pre-charge circuit is used in external storehouse electricity consumption operating mode, passes through the pole of inverse parallel two of the three-phase inverter
Pipe enters to the low-voltage direct Support Capacitor closes the three-phase output contactor after the completion of line precharge, precharge, for charging
Machine is powered.
9. the AuCT according to claim any one of 1-8, it is characterised in that when power supply system is 1500V, institute
Two pre-charge resistance series connection are stated, line precharge is entered to the DC support electric capacity；
Two boost boost modules series connection of the prime boosting unit, and every boost boost modules connect an intermediate frequency
Isolate DC/DC current transformers.
10. the AuCT according to claim any one of 1-8, it is characterised in that when power supply system is 750V, institute
Two pre-charge resistance parallel connections are stated, line precharge is entered to the DC support electric capacity；
Two boost boost modules of the prime boosting unit are in parallel, and every boost boost modules connect an intermediate frequency
Isolate DC/DC current transformers.
11. a kind of control method to AuCT as claimed in claim 1, it is characterised in that including：
Using low-voltage direct busbar voltage as object is stablized, its set-point subtracts the difference of actual value, inputs to the first adjuster, institute
The output of the first adjuster is stated as the given of the output voltage sum of the first prime boosting unit and the second prime boosting unit
Value；
The set-point of the output voltage sum of the first prime boosting unit and the second prime boosting unit subtracts actual value
Difference inputs to the second adjuster, the output of second adjuster as prime boosting unit input current set-point；
The set-point of the prime boosting unit input current subtracts the difference of actual value, inputs to the 3rd adjuster, described
The output of three adjusters as the prime boosting unit dutycycle set-point；
It is single that the output voltage average value of first prime boosting unit and the second prime boosting unit subtracts the first prime boosting
The difference of the output voltage of member, inputs to the 4th adjuster, after amplitude limit, is output as dutycycle correction value；
The set-point of the prime boosting unit dutycycle subtracts the dutycycle amendment and is worth to the first prime boosting list
The dutycycle of member；
The set-point of the prime boosting unit dutycycle is worth to second prime plus the dutycycle amendment and boosts single
The dutycycle of member.
12. a kind of control method to AuCT as claimed in claim 1, it is characterised in that including：
Using low-voltage direct busbar voltage as object is stablized, its set-point subtracts the difference of actual value, inputs to the first adjuster, makees
For prime boosting unit output voltage set-point；
It is single that the input current average value of first prime boosting unit and the second prime boosting unit subtracts the first prime boosting
The difference of first input current, inputs to the second adjuster, after amplitude limit, is output as prime boosting unit output voltage correction value；
The prime boosting unit output voltage set-point adds the prime boosting unit output voltage correction value, obtains described
First prime boosting unit output voltage set-point；
The prime boosting unit output voltage set-point subtracts the prime boosting unit output voltage correction value, obtains described
Second prime boosting unit output voltage set-point；
The first prime boosting unit output voltage set-point subtracts the difference of actual value, inputs to the 3rd adjuster, described
The output of 3rd adjuster as the first prime boosting unit input current set-point；
The second prime boosting unit output voltage set-point subtracts the difference of actual value, inputs to the 4th adjuster, described
The output of 4th adjuster as the second prime boosting unit input current set-point；
The set-point of the first prime boosting unit input current subtracts the difference of actual value, inputs to the 5th adjuster, institute
The output for stating the 5th adjuster is used as the set-point of the first prime boosting unit dutycycle；
The set-point of the second prime boosting unit input current subtracts the difference of actual value, inputs to the 6th adjuster, institute
The output for stating the 6th adjuster is used as the set-point of the second prime boosting unit dutycycle.
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