CN106972603B - A kind of V2G charger and its control method using High Frequency Link matrix converter - Google Patents
A kind of V2G charger and its control method using High Frequency Link matrix converter Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
-
- 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
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
- H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
-
- H02J2007/10—
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses a kind of V2G chargers and its control method using High Frequency Link matrix converter, V2G charger includes net side filter, High Frequency Link matrix converter, single-phase bridge full-controlled rectifier device and battery side filter, the High Frequency Link matrix converter includes the single-phase AC/AC matrix converter of three-phase-and high frequency transformer T, and the single-phase AC/AC matrix converter of the net side filter, three-phase-, high frequency transformer T, single-phase bridge full-controlled rectifier device, battery side filter are sequentially connected；V2G charger control method includes the steps that charging and feed, charging and feed are all made of outer ring switching control and generate outer loop control amount, outer loop control amount progress inner ring decoupling control is obtained into pulse signal, and pulse signal control High Frequency Link matrix converter is realized into charging or feed.The present invention has the advantages that structure simplification, high conversion efficiency, volume weight is small, it is good to fill feed control stabilization, battery protection.
Description
Technical field
The present invention relates to V2G chargers, and in particular to a kind of using the V2G charger of High Frequency Link matrix converter and its control
Method processed.
Background technique
V2G (Vehicle to Grid) charger be a kind of charger for electric car, it can be achieved that electric car with
Energy can be fed back to power grid when electric car does not work, can obtained when charging is required from power grid by the connection between power grid
Energy.V2G charger existing structure can be divided into non-isolation type and isolated form: non-isolation type transless is high-efficient, but exists altogether
Security risk caused by mode voltage；Isolated form is divided into Industrial Frequency Transformer type and high frequency transformer type, Industrial Frequency Transformer type volume again
Weight is big, higher cost, and high frequency transformer type volume weight is small, and can play the role of insulation blocking to circuit.High frequency
Needed in transformer type structure using AC-DC, DC-AC, AC-DC tertiary structure, multilevel energy convert so that overall power density and
Energy density is not high, and there are high-capacity direct current energy-storage travelling wave tube on DC bus, volume cost is higher.For the control of the charger
System be mostly for battery charge requirement design constant current, constant pressure switching control strategy, but the strategy be not implemented V2G application in
V2G dispatches the cooperation of system power distribution instruction, and the compatible degree in V2G application is not high.
Summary of the invention
The technical problem to be solved in the present invention: on the one hand, for the disadvantage on current V2G charger construction, one kind is provided
It is single-phase by three-phase-using the topological structure of High Frequency Link matrix converter using the V2G charger of High Frequency Link matrix converter
AC/AC matrix converter is linked with high frequency transformer, avoids security risk caused by common-mode voltage, and tertiary structure is simplified
For two-stage, reduces conversion series and improve transfer efficiency, the use of DC bus energy-storage travelling wave tube (such as bulky capacitor) is omitted, significantly
The volume weight of reduction system.On the other hand, for the disadvantage on current V2G charger control strategy, the present invention provides one kind
Using the control method (charging/feed) of the V2G charger of High Frequency Link matrix converter, switched using outer ring invariable power and constant pressure
The double-loop control strategy combined with inner ring decoupling control is controlled, the New charger is enabled to dispatch system according to V2G
Given power, which stablize, quickly fills feed operation, while outer ring invariable power and the switching PI of constant pressure control, is guaranteeing to fill
Under the premise of electric safety, that realizes the specified power progress fast and stable that V2G charger is distributed according to its scheduling system fills feed
Control can avoid over-charging of battery over-discharge, prolong its service life, inner ring decoupling control can flexibly control net side according to power grid demand
Power factor.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
On the one hand, the present invention provides a kind of control method of V2G charger using High Frequency Link matrix converter, using height
The V2G charger of frequency chain matrix converter include net side filter, High Frequency Link matrix converter, single-phase bridge full-controlled rectifier device with
And battery side filter, the High Frequency Link matrix converter include the single-phase AC/AC matrix converter of three-phase-and high frequency transformer T,
The single-phase AC/AC matrix converter of the net side filter, three-phase-, high frequency transformer T, single-phase bridge full-controlled rectifier device, battery side
Filter is sequentially connected, V2G charger charge the step of include:
A1) by voltage given valueWith the voltage detecting value u for being electrically charged batterydcCompare and calculates difference
A2) judge differenceWhether 0 is greater than, if differenceIt is jumped greater than 0 and executes step A3)；Otherwise,
In differenceIt is jumped when less than or equal to 0 and executes step A4)；
A3) determine that cell voltage is not up to charging upper limit, select and use power limitation control mode, by power given value P*Through
FormulaBattery current given value is calculatedBy battery current given valueIt is obtained by amplitude limit link
By the given value of current value after clippingWith detected value idcDifference after being compared is as the input outer ring PI control of outer loop control amount
Device；It jumps and executes step A5)；
A4) determine that cell voltage reaches charging upper limit, select and use Isobarically Control mode, directly by the differenceMake
Outer ring PI controller is inputted for outer loop control amount；It jumps and executes step A5)；
A5) using the output of outer ring PI controller as current on line side d axis given valueWhen net side unity power factor controls
When by current on line side q axis given valueBe set as 0, when need to provide reactive compensation for power grid if by current on line side q axis given value
It is set as offset；
A6) respectively by current on line side d axis given valueWith the d repacking measured value i of current on line sidesdInner ring is used as after being compared
The input quantity of PI controller is controlled, to obtain the d axis component i of reference current vectord, by current on line side q axis given valueWith the q repacking measured value i of current on line sidesqInput quantity after being compared as inner ring PI controller is controlled, to obtain
The q axis component i of reference current vectorq；
A7) in the d axis component i for obtaining reference current vectord, reference current vector q axis component iqOn the basis of, respectively
The control wave of the single-phase AC/AC matrix converter of three-phase-is generated using preset modulation algorithm；Meanwhile controlling single-phase bridge
Formula full-controlled rectifier device is in rectification state.
Preferably, step A7) in using preset modulation algorithm generate the single-phase AC/AC matrix converter of three-phase-control
The detailed step of pulse signal includes:
A7.1 a, b, c three-phase current i) are directed toa、ib、icIt is maximum with a phase current absolute value, another biphase current polarity is same
It is that rule is classified as 6 sectors from time domain on the contrary, by reference current vector6 sectors in a cycle are indicated multiple
In plane, to be in 6 effective switching vector selectors of counter clockwise direction cycle arrangement For boundary；
A7.2 it) uses Bipolar current Space Vector Modulation Strategy: being directed to reference current vectorLocating sector, preceding
Half period uses SVPWM method, by reference current vectorTwo adjacent effective switching vector selectors of locating sector and null vector
Amount synthesis forward current, voltage is positive at this time；The later half period using two opposite with first half cycle effective switching vector selectors and
Zero vector carries out synthesizing equal in magnitude, contrary electric current, and voltage is negative at this time；
A7.3) according to reference current vectorHalf cycle before locating sector is calculated using one of formula (1-1)~(1-6)
The duty ratio d of phase two effective switching vector selectorsx1And dy1And the corresponding duty ratio d of zero vector01, according to reference current vectorInstitute
The sector at place calculates the duty ratio d of the later half period two effective switching vector selectors using one of formula (2-1)~(2-6)x2And dy2
And the corresponding duty ratio d of zero vector02；In formula (1-1)~(1-6) and formula (2-1)~(2-6), miFor High Frequency Link matrix converter
The index of modulation, θiFor reference current vectorPhase angle, dab、dac、dbc、dba、dca、dcbRespectively indicate corresponding switching vector selectorDuty ratio when conducting；daa、dbb、dccRespectively indicate corresponding zero
VectorDuty ratio when conducting；
Formula (1-1) is first half cycle reference current vectorCalculation expression when positioned at I sector；
Formula (1-2) is first half cycle reference current vectorCalculation expression when positioned at Section II sector；
Formula (1-3) is first half cycle reference current vectorCalculation expression when positioned at Section III sector；
Formula (1-4) is first half cycle reference current vectorCalculation expression when positioned at Section IV sector；
Formula (1-5) is first half cycle reference current vectorCalculation expression when positioned at V sector；
Formula (1-6) is first half cycle reference current vectorCalculation expression when positioned at Section VI sector；
Formula (2-1) is later half period reference current vectorCalculation expression when positioned at I sector；
Formula (2-2) is later half period reference current vectorCalculation expression when positioned at Section II sector；
Formula (2-3) is later half period reference current vectorCalculation expression when positioned at Section III sector；
Formula (2-4) is later half period reference current vectorCalculation expression when positioned at Section IV sector；
Formula (2-5) is later half period reference current vectorCalculation expression when positioned at V sector；
Formula (2-6) is later half period reference current vectorCalculation expression when positioned at Section VI sector；
A7.4 it) is exported respectively according to corresponding duty ratio for controlling each double of the single-phase AC/AC matrix converter of three-phase-
To the control wave of switch.
Preferably, step A7) control single-phase bridge full-controlled rectifier device be in rectification state specifically refer to it is single-phase in three-phase-
The first half cycle of the unit switch periods of AC/AC matrix converter, the corresponding conducting IGBT S of single-phase bridge full-controlled rectifier device1、S4,
Turn off IGBT S2、S3；In the later half period of the unit switch periods of the single-phase AC/AC matrix converter of three-phase-, single-phase bridge is controlled entirely
The corresponding conducting IGBT S of rectifier2、S3, turn off IGBT S1、S4, thus by the output of the single-phase AC/AC matrix converter of three-phase-
Single-phase high frequency alternating current is converted to direct current.
On the other hand, it the present invention also provides a kind of control method of V2G charger using High Frequency Link matrix converter, adopts
It include net side filter, High Frequency Link matrix converter, single-phase bridge full-controlled rectifier with the V2G charger of High Frequency Link matrix converter
Device and battery side filter, the High Frequency Link matrix converter include the single-phase AC/AC matrix converter of three-phase-and high frequency transformation
Device T, the single-phase AC/AC matrix converter of the net side filter, three-phase-, high frequency transformer T, single-phase bridge full-controlled rectifier device, electricity
Pond side filter is sequentially connected, V2G charger feed the step of include:
B1) by voltage given valueWith the voltage detecting value u for being electrically charged batterydcCompare and calculates difference
B2) judge differenceWhether less than 0, if differenceIt is jumped less than 0 and executes step B3)；Otherwise,
In differenceIt is jumped when more than or equal to 0 and executes step B4)；
B3) determine cell voltage not up to electric discharge lower limit, select and use power limitation control mode, by power given value P*Through
FormulaBattery current given value is calculatedBy battery current given valueIt is obtained by amplitude limit link
By the given value of current value after clippingWith detected value idcDifference after being compared is as the input outer ring PI control of outer loop control amount
Device；It jumps and executes step B5)；
B4) determine that battery reaches electric discharge lower limit, select and use Isobarically Control mode, directly by the differenceAs outer
Ring control amount inputs outer ring PI controller；It jumps and executes step B5)；
B5) using the output of outer ring PI controller as current on line side d axis given valueWhen net side unity power factor controls
When by current on line side q axis given valueBe set as 0, when need to provide reactive compensation for power grid if by current on line side q axis given value
It is set as offset；
B6) respectively by current on line side d axis given valueWith the d repacking measured value i of current on line sidesdInner ring is used as after being compared
The input quantity of PI controller is controlled, to obtain the d axis component i of reference current vectord, by current on line side q axis given valueWith the q repacking measured value i of current on line sidesqInput quantity after being compared as inner ring PI controller is controlled, to obtain
The q axis component i of reference current vectorq；
B7) in the d axis component i for obtaining reference current vectord, reference current vector q axis component iqOn the basis of, respectively
The control wave of the single-phase AC/AC matrix converter of three-phase-is generated using preset modulation algorithm；Meanwhile controlling single-phase bridge
Formula full-controlled rectifier device is in inverter mode.
Preferably, step B7) in using preset modulation algorithm generate the single-phase AC/AC matrix converter of three-phase-control
The detailed step of pulse signal includes:
B7.1 a, b, c three-phase current i) are directed toa、ib、icIt is maximum with a phase current absolute value, another biphase current polarity is same
It is that rule is classified as 6 sectors from time domain on the contrary, by reference current vector6 sectors in a cycle are indicated multiple
In plane, to be in 6 effective switching vector selectors of counter clockwise direction cycle arrangement For boundary；
B7.2 it) uses Bipolar current Space Vector Modulation Strategy: being directed to reference current vectorLocating sector, preceding
The input of half period three-phase-single-phase AC/AC matrix converter is that forward voltage is sweared using SVPWM method by reference current
AmountTwo adjacent effective switching vector selectors of locating sector and zero vector synthesize forward current；In later half period three-phase-single-phase AC/
The input of AC matrix converter be negative voltage, using two opposite with first half cycle effective switching vector selectors and zero vector come into
Row synthesizes equal in magnitude, contrary electric current, and negative supports, just synthesis electric current identical with first half cycle；
B7.3) according to reference current vectorHalf cycle before locating sector is calculated using one of formula (1-1)~(1-6)
The duty ratio d of phase two effective switching vector selectorsx1And dy1And the corresponding duty ratio d of zero vector01, according to reference current vectorInstitute
The sector at place calculates the duty ratio d of the later half period two effective switching vector selectors using one of formula (2-1)~(2-6)x2And dy2
And the corresponding duty ratio d of zero vector02；In formula (1-1)~(1-6) and formula (2-1)~(2-6), miFor High Frequency Link matrix converter
The index of modulation, θiFor reference current vectorPhase angle, dab、dac、dbc、dba、dca、dcbRespectively indicate corresponding switching vector selectorDuty ratio when conducting；daa、dbb、dccRespectively indicate corresponding zero
VectorDuty ratio when conducting；
Formula (1-1) is first half cycle reference current vectorCalculation expression when positioned at I sector；
Formula (1-2) is first half cycle reference current vectorCalculation expression when positioned at Section II sector；
Formula (1-3) is first half cycle reference current vectorCalculation expression when positioned at Section III sector；
Formula (1-4) is first half cycle reference current vectorCalculation expression when positioned at Section IV sector；
Formula (1-5) is first half cycle reference current vectorCalculation expression when positioned at V sector；
Formula (1-6) is first half cycle reference current vectorCalculation expression when positioned at Section VI sector；
Formula (2-1) is later half period reference current vectorCalculation expression when positioned at I sector；
Formula (2-2) is later half period reference current vectorCalculation expression when positioned at Section II sector；
Formula (2-3) is later half period reference current vectorCalculation expression when positioned at Section III sector；
Formula (2-4) is later half period reference current vectorCalculation expression when positioned at Section IV sector；
Formula (2-5) is later half period reference current vectorCalculation expression when positioned at V sector；
Formula (2-6) is later half period reference current vectorCalculation expression when positioned at Section VI sector；
B7.4 it) is exported respectively according to corresponding duty ratio for controlling each double of the single-phase AC/AC matrix converter of three-phase-
To the control wave of switch.
Preferably, step B7) control single-phase bridge full-controlled rectifier device be in inverter mode specifically refer to it is single-phase in three-phase-
The first half cycle of the unit switch periods of AC/AC matrix converter, the corresponding conducting IGBT S of single-phase bridge full-controlled rectifier device1、S4,
Turn off IGBT S2、S3；In the later half period of the unit switch periods of the single-phase AC/AC matrix converter of three-phase-, single-phase bridge is controlled entirely
The corresponding conducting IGBT S of rectifier2、S3, turn off IGBT S1、S4, so that the direct current that battery exports is converted to positive and negative alternation
Single-phase alternating current, thus the input voltage as the single-phase AC/AC matrix converter of three-phase-.
The present invention is had an advantage that using the V2G charger of High Frequency Link matrix converter using High Frequency Link matrixing
The V2G charger of device uses the topological structure of High Frequency Link matrix converter, passes through the single-phase AC/AC matrix converter of three-phase-and height
The link of frequency power transformer avoids security risk caused by common-mode voltage, and tertiary structure is reduced to two-stage, reduces conversion series
And transfer efficiency is improved, the use of DC bus energy-storage travelling wave tube (such as bulky capacitor) is omitted, substantially reduces the volume weight of system.
The present invention has an advantage that the present invention adopts using the control method of the V2G charger of High Frequency Link matrix converter
With the control method of the V2G charger of High Frequency Link matrix converter in charging/feed, switched using outer ring invariable power and constant pressure
The double-loop control strategy combined with inner ring decoupling control is controlled, the New charger is enabled to dispatch system according to V2G
Given power, which stablize, quickly fills feed operation, while outer ring invariable power and the switching PI of constant pressure control, is guaranteeing to fill
Under the premise of electric safety, that realizes the specified power progress fast and stable that V2G charger is distributed according to its scheduling system fills feed
Control can avoid over-charging of battery over-discharge, prolong its service life, inner ring decoupling control can flexibly control net side according to power grid demand
Power factor.
Detailed description of the invention
Fig. 1 is the charging principle schematic diagram of the embodiment of the present invention.
Fig. 2 is the feed schematic illustration of the embodiment of the present invention.
Fig. 3 is the bidirectional switch circuit schematic illustration of the embodiment of the present invention.
Fig. 4 is the charge control schematic illustration of the embodiment of the present invention.
Fig. 5 is the time domain schematic diagram that the sector of the embodiment of the present invention divides.
Fig. 6 is the complex plane schematic diagram that the sector of the embodiment of the present invention divides.
Vector modulation figure in unit switch periods when Fig. 7 is in the sector I for the reference current vector of the embodiment of the present invention
Specific embodiment
As depicted in figs. 1 and 2, the present embodiment using High Frequency Link matrix converter V2G charger include net side filter,
High Frequency Link matrix converter, single-phase bridge full-controlled rectifier device and battery side filter, the High Frequency Link matrix converter include
The single-phase AC/AC matrix converter of three-phase-and high frequency transformer T, the single-phase AC/AC matrixing of the net side filter, three-phase-
Device, high frequency transformer T, single-phase bridge full-controlled rectifier device, battery side filter are sequentially connected.High Frequency Link matrix converter and Xiang Qiao
The two-way flow of energy may be implemented in formula full-controlled rectifier device 2 stage converter.When charging to electric vehicle: net side is through High Frequency Link square
Battle array converter converts three phase sine industrial-frequency alternating current to the single phase ac high-frequency electrical of positive and negative alternation, after high frequency transformer boosts
It is converted into direct current by single-phase bridge full-controlled rectifier device, filter reduces the pulsation of battery terminal voltage.Electric vehicle is to power grid
When feed: battery DC electricity controls the single phase ac high-frequency electrical that inverter is converted into positive and negative alternation by single-phase bridge entirely, through high frequency
Three phase sine industrial-frequency alternating current is converted by High Frequency Link matrix converter after transformer pressure-reducing.The present embodiment uses High Frequency Link square
The V2G charger of battle array converter avoids the security risk of common-mode voltage using transformer isolation structure, and high frequency transformer phase
Compared with the volume weight that system is greatly reduced in Industrial Frequency Transformer.Traditional tertiary structure is reduced to two-stage, direct current is omitted
Bus capacitor, improving transfer efficiency reduces the complexity of system, and the excellent of this kind of novel V2G charger is embodied from structure
Gesture.
As depicted in figs. 1 and 2, the single-phase AC/AC matrix converter of the three-phase-is made of 6 two-way switch, and every two is double
To a transformation branch in series is switched, each converts intermediate connection point and net side in branch between two two-way switch
One phase output terminal of filter is connected, and three transformation branches are jointly and the primary side of high frequency transformer T is in parallel.
As shown in figure 3, two-way switch includes the IGBT module Q of reverse parallel connection and common emitter1With IGBT module Q2, and institute
State IGBT module Q1With anti-paralleled diode D1, the IGBT module Q2With anti-paralleled diode D2。
As depicted in figs. 1 and 2, single-phase bridge full-controlled rectifier device is by 4 IGBT S1~S4And its antiparallel two pole of afterflow
Pipe is constituted, IGBT S1And S3A rectification branch in series, IGBT S2And S4Another rectification branch in series, every
The intermediate connection point rectified between two IGBT of branch is connected with a terminal on the secondary side of high frequency transformer T, and two rectifications
It is connected after branch circuit parallel connection with battery side filter.
As shown in figure 4, using the control method of the V2G charger of High Frequency Link matrix converter charging the step of include:
A1) by voltage given valueWith the voltage detecting value u for being electrically charged batterydcCompare and calculates difference
A2) judge differenceWhether 0 is greater than, if differenceIt is jumped greater than 0 and executes step A3)；Otherwise,
In differenceIt is jumped when less than or equal to 0 and executes step A4)；
A3) determine that cell voltage is not up to charging upper limit, select and use power limitation control mode, by power given value P*Through
FormulaBattery current given value is calculatedBy battery current given valueIt is obtained by amplitude limit link
By the given value of current value after clippingWith detected value idcDifference after being compared is as the input outer ring PI control of outer loop control amount
Device；It jumps and executes step A5)；
A4) determine that cell voltage reaches charging upper limit, select and use Isobarically Control mode, directly by the differenceMake
Outer ring PI controller is inputted for outer loop control amount；It jumps and executes step A5)；
A5) using the output of outer ring PI controller as current on line side d axis given valueWhen net side unity power factor controls
When by current on line side q axis given valueBe set as 0, when need to provide reactive compensation for power grid if by current on line side q axis given value
It is set as offset；
A6) respectively by current on line side d axis given valueWith the d repacking measured value i of current on line sidesdInner ring is used as after being compared
The input quantity of PI controller is controlled, to obtain the d axis component i of reference current vectord, by current on line side q axis given valueWith the q repacking measured value i of current on line sidesqInput quantity after being compared as inner ring PI controller is controlled, to obtain
The q axis component i of reference current vectorq；
A7) in the d axis component i for obtaining reference current vectord, reference current vector q axis component iqOn the basis of, respectively
The control wave of the single-phase AC/AC matrix converter of three-phase-is generated using preset modulation algorithm；Meanwhile controlling single-phase bridge
Formula full-controlled rectifier device is in rectification state.
In above-mentioned steps, step A1)~A4) be outer ring switching control, step A5)~A7) it is inner ring decoupling control, electric current
It is the independent control for realizing net side active power and reactive power in interior ring design, three-phase static coordinate system is transformed into two-phase rotation
Turn coordinate system, using decoupling control policy.Through inner ring decoupling control, pulse signal is obtained to realize the control of the charger.
The control for the novel V2G charger that the present embodiment is proposed using the control method of the V2G charger of High Frequency Link matrix converter
System strategy fully considers the application in V2G technology, that is, fills on the basis of conventional batteries charge constant current and constant pressure switching control
The optimal power that electric appliance should be distributed according to V2G system call is charged or is fed.Therefore use outer ring invariable power and constant pressure
Switching control strategy and inner ring decoupling control policy, such as Fig. 4.Power limitation control strategy can make the charger according to system call
Obtained optimal power is quickly charged/is fed；Isobarically Control strategy can avoid the super-charge super-discharge of battery, guarantee system fortune
Capable safety.Inner ring uses decoupling control, controls its active and reactive current respectively, and then according to its function of net side demand control
Rate factor.
In the present embodiment, step A7) the middle use preset modulation algorithm generation single-phase AC/AC matrix converter of three-phase-
The detailed step of control wave includes:
A7.1 a, b, c three-phase current i) are directed toa、ib、icIt is maximum with a phase current absolute value, another biphase current polarity is same
It is that rule is classified as 6 sectors from time domain on the contrary, as shown in Figure 5；By reference current vector6 fans in a cycle
Area indicates on a complex plane, to be in 6 effective switching vector selectors of counter clockwise direction cycle arrangement For boundary, as shown in Figure 6；Two words behind each vector in bracket
It is female successively to indicate that upper bridge arm and company, lower bridge arm institute input that corresponding switch is in the conductive state, and rest switch is turned off.Such as
Switching vector selectorBridge arm a phase switch S in expressionapWith lower bridge arm b phase switch SbnConducting, rest switch are all closed；
A7.2 it) uses Bipolar current Space Vector Modulation Strategy: being directed to reference current vectorLocating sector, preceding
Half period uses SVPWM method, by reference current vectorTwo adjacent effective switching vector selectors of locating sector and null vector
Amount synthesis forward current, voltage is positive at this time；The later half period using two opposite with first half cycle effective switching vector selectors and
Zero vector carries out synthesizing equal in magnitude, contrary electric current, and voltage is negative at this time；
With reference current vectorFor I sector, in first half cycle using conventional SVPWM method, by its institute
Locate two adjacent effective switching vector selectors of sectorWithAnd zero vector synthesizes forward current, voltage is positive at this time.?
The later half period uses the vector opposite with first half cycleWithAnd zero vector is synthesized.Since current reference is sweared
Amount then synthesizes contrary electric current equal in magnitude using opposite Vector modulation still in the Ith sector just, at this time voltage
It is negative；Fig. 7 is reference current vectorVector modulation figure in unit switch periods when in I sector, it is seen then that use the bipolarity
Current space vector modulation strategy can synthesize the high-frequency electrical of positive and negative alternation.A7.3) according to reference current vectorLocating sector meter
Calculate the duty ratio d of first half cycle two effective switching vector selectorsx1And dy1And the corresponding duty ratio d of zero vector01, according to reference current
VectorLocating sector calculates the duty ratio d of the later half period two effective switching vector selectorsx2And dy2And the corresponding duty of zero vector
Compare d02；
In the present embodiment, according to reference current vectorLocating sector calculate first half cycle two effective switching vector selectors and
The corresponding duty ratio of zero vector is as shown in table 1.Wherein vector 1 and vector 2 are effective switching vector selector 1 and effective switching vector selector 2
Referred to as, vector 3 is the abbreviation of first half cycle zero vector, and 1~duty ratio of duty ratio 3 respectively corresponds 1~vector of vector 3.
Table 1: the selection and duty ratio corresponding of each sector first half cycle switching vector selector
In the present embodiment, according to reference current vectorLocating sector calculate the later half period two effective switching vector selectors and
The corresponding duty ratio of zero vector is as shown in table 2.Wherein vector 1 and vector 2 are effective switching vector selector 1 and effective switching vector selector 2
Referred to as, vector 3 is the abbreviation of later half period zero vector, and 1~duty ratio of duty ratio 3 respectively corresponds 1~vector of vector 3.
Table 2: the selection and duty ratio corresponding of each later half period switching vector selector in sector
By taking reference current vector is in I sector as an example, space vector is In first half cycle by switching vector selector And zero vectorSynthesis, can be by opposite vector in the later half periodAnd zero vector
Synthesis；Wherein, m=Iim/Ibat(0 < m < 1) is the index of modulation of high frequency matrix converter, IimFor the amplitude of current on line side, Ibat
For battery side electric current, θ is input current space vectorAzimuth, in sector I, θ ∈ [- π/6, π/6]；
A7.4 it) is exported respectively according to corresponding duty ratio for controlling each double of the single-phase AC/AC matrix converter of three-phase-
To the control wave of switch.For example, select vector 1 forUpper bridge arm a phase switch Sap is then connected, lower bridge arm b phase is opened
Close Sbn, rest switch shutdown.Select vector 2 forUpper bridge arm a phase switch S is then connectedap, lower bridge arm c phase switch Scn,
Remaining switch OFF.Indicate that the switch of corresponding upper bridge arm and lower bridge arm conducting, rest switch are turned off in vector bracket.
In the present embodiment, step A7) control single-phase bridge full-controlled rectifier device be in rectification state specifically refer to it is mono- in three-phase-
The first half cycle of the unit switch periods of phase AC/AC matrix converter, the corresponding conducting IGBT S of single-phase bridge full-controlled rectifier device1、
S4, turn off IGBT S2、S3；In the later half period of the unit switch periods of the single-phase AC/AC matrix converter of three-phase-, single-phase bridge
The corresponding conducting IGBT S of full-controlled rectifier device2、S3, turn off IGBT S1、S4, thus by the defeated of the single-phase AC/AC matrix converter of three-phase-
Single-phase high frequency alternating current out is converted to direct current.
The present embodiment using High Frequency Link matrix converter V2G charger control method feed the step of include:
B1) by voltage given valueWith the voltage detecting value u for being electrically charged batterydcCompare and calculates difference
B2) judge differenceWhether less than 0, if differenceIt is jumped less than 0 and executes step B3)；Otherwise,
In differenceIt is jumped when more than or equal to 0 and executes step B4)；
B3) determine cell voltage not up to electric discharge lower limit, select and use power limitation control mode, by power given value P*Through
FormulaBattery current given value is calculatedBy battery current given valueIt is obtained by amplitude limit link
By the given value of current value after clippingWith detected value idcDifference after being compared is as the input outer ring PI control of outer loop control amount
Device；It jumps and executes step B5)；
B4) determine that battery reaches electric discharge lower limit, select and use Isobarically Control mode, directly by the differenceAs outer
Ring control amount inputs outer ring PI controller；It jumps and executes step B5)；
B5) using the output of outer ring PI controller as current on line side d axis given valueWhen net side unity power factor controls
When by current on line side q axis given valueBe set as 0, when need to provide reactive compensation for power grid if by current on line side q axis given value
It is set as offset；
B6) respectively by current on line side d axis given valueWith the d repacking measured value i of current on line sidesdInner ring is used as after being compared
The input quantity of PI controller is controlled, to obtain the d axis component i of reference current vectord, by current on line side q axis given valueWith the q repacking measured value i of current on line sidesqInput quantity after being compared as inner ring PI controller is controlled, to obtain
The q axis component i of reference current vectorq；
B7) in the d axis component i for obtaining reference current vectord, reference current vector q axis component iqOn the basis of, respectively
The control wave of the single-phase AC/AC matrix converter of three-phase-is generated using preset modulation algorithm；Meanwhile controlling single-phase bridge
Formula full-controlled rectifier device is in inverter mode.
In above-mentioned steps, step B1)~B4) be outer ring switching control, step B5)~B7) it is inner ring decoupling control, electric current
It is the independent control for realizing net side active power and reactive power in interior ring design, three-phase static coordinate system is transformed into two-phase rotation
Turn coordinate system, using decoupling control policy.Through inner ring decoupling control, pulse signal is obtained to realize the control of the charger.
The control for the novel V2G charger that the present embodiment is proposed using the control method of the V2G charger of High Frequency Link matrix converter
System strategy fully considers the application in V2G technology, that is, fills on the basis of conventional batteries charge constant current and constant pressure switching control
The optimal power that electric appliance should be distributed according to V2G system call is charged or is fed.Therefore use outer ring invariable power and constant pressure
Switching control strategy and inner ring decoupling control policy, such as Fig. 4.Power limitation control strategy can make the charger according to system call
Obtained optimal power is quickly charged/is fed；Isobarically Control strategy can avoid the super-charge super-discharge of battery, guarantee system fortune
Capable safety.Inner ring uses decoupling control, controls its active and reactive current respectively, and then according to its function of net side demand control
Rate factor.
In the present embodiment, step B7) the middle use preset modulation algorithm generation single-phase AC/AC matrix converter of three-phase-
The detailed step of control wave includes:
B7.1 a, b, c three-phase current i) are directed toa、ib、icIt is maximum with a phase current absolute value, another biphase current polarity is same
It is that rule is classified as 6 sectors from time domain on the contrary, by reference current vector6 sectors in a cycle are indicated multiple
In plane, to be in 6 effective switching vector selectors of counter clockwise direction cycle arrangement For boundary；
B7.2 it) uses Bipolar current Space Vector Modulation Strategy: being directed to reference current vectorLocating sector, preceding
The input of half period three-phase-single-phase AC/AC matrix converter is that forward voltage is sweared using SVPWM method by reference current
AmountTwo adjacent effective switching vector selectors of locating sector and zero vector synthesize forward current；In later half period three-phase-single-phase AC/
The input of AC matrix converter be negative voltage, using two opposite with first half cycle effective switching vector selectors and zero vector come into
Row synthesizes equal in magnitude, contrary electric current, and negative supports, just synthesis electric current identical with first half cycle；
B7.3) according to reference current vectorLocating sector calculates first half cycle two effective switching vector selectors and zero vector
Corresponding duty ratio, according to reference current vectorLocating sector calculates the later half period two effective switching vector selectors and zero vector
Corresponding duty ratio；Referring to step A7.3, table 1,2)；
B7.4 it) is exported respectively according to corresponding duty ratio for controlling each double of the single-phase AC/AC matrix converter of three-phase-
To the control wave of switch.For example, select vector 1 forUpper bridge arm a phase switch Sap is then connected, lower bridge arm b phase is opened
Close Sbn, rest switch shutdown.Indicate that the switch of corresponding upper bridge arm and lower bridge arm conducting, rest switch are turned off in vector bracket.
In the present embodiment, step B7) control single-phase bridge full-controlled rectifier device be in inverter mode specifically refer to it is mono- in three-phase-
The first half cycle of the unit switch periods of phase AC/AC matrix converter, the corresponding conducting IGBT S of single-phase bridge full-controlled rectifier device1、
S4, turn off IGBT S2、S3；In the later half period of the unit switch periods of the single-phase AC/AC matrix converter of three-phase-, single-phase bridge
The corresponding conducting IGBT S of full-controlled rectifier device2、S3, turn off IGBT S1、S4, so that the direct current that battery exports is converted to positive and negative friendship
The single-phase alternating current of change, thus the input voltage as the single-phase AC/AC matrix converter of three-phase-.In feed direction, single-phase bridge
Full control circuit runs on inverter mode, and switch-turn-ON states are identical as charging direction.
In the present embodiment, charging/feed process is to automatically control, and power network dispatching system can be according to grid side information and negative
Situation is carried, specific charging/fed power of each participation V2G operation electric car is determined using related algorithms such as intelligent optimizations,
Namely corresponding charger fills/fed power.The present embodiment is not illustrated for power network dispatching system, only considers power grid
Scheduling system is given to fill/fed power after, charger can fast and accurately follow given performance number to carry out stability contorting.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of control method of the V2G charger using High Frequency Link matrix converter, the V2G charger is filtered comprising net side
Device, High Frequency Link matrix converter, single-phase bridge full-controlled rectifier device and battery side filter, the High Frequency Link matrix converter packet
Include the single-phase AC/AC matrix converter of three-phase-and high frequency transformer T, the single-phase AC/AC matrixing of the net side filter, three-phase-
Device, high frequency transformer T, single-phase bridge full-controlled rectifier device, battery side filter are sequentially connected, which is characterized in that the V2G charging
The step of charging of device includes:
A1) by voltage given valueWith the voltage detecting value u for being electrically charged batterydcCompare and calculates difference
A2) judge differenceWhether 0 is greater than, if differenceIt is jumped greater than 0 and executes step A3)；Otherwise, in difference
ValueIt is jumped when less than or equal to 0 and executes step A4)；
A3) determine that cell voltage is not up to charging upper limit, select and use power limitation control mode, by power given value P*Through formulaBattery current given value is calculatedBy battery current given valueIt is obtained by amplitude limit linkIt will limit
Given value of current value after widthWith detected value idcDifference after being compared inputs outer ring PI controller as outer loop control amount；It jumps
Turn to execute step A5)；
A4) determine that cell voltage reaches charging upper limit, select and use Isobarically Control mode, directly by the differenceAs outer
Ring control amount inputs outer ring PI controller；It jumps and executes step A5)；
A5) using the output of outer ring PI controller as current on line side d axis given valueIt will when net side unity power factor control
Current on line side q axis given valueBe set as 0, when need to provide reactive compensation for power grid if by current on line side q axis given valueSetting
For offset；
A6) respectively by current on line side d axis given valueWith the d repacking measured value i of current on line sidesdIt is controlled after being compared as inner ring PI
The input quantity of device processed is controlled, to obtain the d axis component i of reference current vectord, by current on line side q axis given valueAnd net
The q repacking measured value i of side electric currentsqInput quantity after being compared as inner ring PI controller is controlled, to obtain with reference to electricity
The q axis component i of flow vectorq；
A7) in the d axis component i for obtaining reference current vectord, reference current vector q axis component iqOn the basis of, it is respectively adopted
Preset modulation algorithm generates the control wave of the single-phase AC/AC matrix converter of three-phase-；Meanwhile it is complete to control single-phase bridge
Control rectifier is in rectification state.
2. according to claim 1 using the control method of the V2G charger of High Frequency Link matrix converter, which is characterized in that
Step A7) in using preset modulation algorithm generate the single-phase AC/AC matrix converter of three-phase-control wave detailed step
Suddenly include:
A7.1 a, b, c three-phase current i) are directed toa、ib、icIt is maximum with a phase current absolute value, another biphase current polarity is the same as its phase
It is anti-that 6 sectors are classified as from time domain for rule, by reference current vector6 sectors in a cycle are indicated in complex plane
On, to be in 6 effective switching vector selectors of counter clockwise direction cycle arrangement For boundary；
A7.2 it) uses Bipolar current Space Vector Modulation Strategy: being directed to reference current vectorLocating sector, in preceding half cycle
Phase uses SVPWM method, by reference current vectorTwo adjacent effective switching vector selectors of locating sector and zero vector close
At forward current, voltage is positive at this time；Two opposite with first half cycle effective switching vector selectors and null vector are used in the later half period
Amount is to carry out synthesizing equal in magnitude, contrary electric current, and voltage is negative at this time；
A7.3) according to reference current vectorLocating sector calculates first half cycle two using one of formula (1-1)~(1-6)
The duty ratio d of a effective switching vector selectorx1And dy1And the corresponding duty ratio d of zero vector01, according to reference current vectorLocating
Sector calculates the duty ratio d of the later half period two effective switching vector selectors using one of formula (2-1)~(2-6)x2And dy2And zero
The corresponding duty ratio d of vector02；In formula (1-1)~(1-6) and formula (2-1)~(2-6), miFor the tune of High Frequency Link matrix converter
Coefficient processed, θiFor reference current vectorPhase angle, dab、dac、dbc、dba、dca、dcbRespectively indicate corresponding switching vector selectorDuty ratio when conducting；daa、dbb、dccRespectively indicate corresponding zero
VectorDuty ratio when conducting；
Formula (1-1) is first half cycle reference current vectorCalculation expression when positioned at I sector；
Formula (1-2) is first half cycle reference current vectorCalculation expression when positioned at Section II sector；
Formula (1-3) is first half cycle reference current vectorCalculation expression when positioned at Section III sector；
Formula (1-4) is first half cycle reference current vectorCalculation expression when positioned at Section IV sector；
Formula (1-5) is first half cycle reference current vectorCalculation expression when positioned at V sector；
Formula (1-6) is first half cycle reference current vectorCalculation expression when positioned at Section VI sector；
Formula (2-1) is later half period reference current vectorCalculation expression when positioned at I sector；
Formula (2-2) is later half period reference current vectorCalculation expression when positioned at Section II sector；
Formula (2-3) is later half period reference current vectorCalculation expression when positioned at Section III sector；
Formula (2-4) is later half period reference current vectorCalculation expression when positioned at Section IV sector；
Formula (2-5) is later half period reference current vectorCalculation expression when positioned at V sector；
Formula (2-6) is later half period reference current vectorCalculation expression when positioned at Section VI sector；
A7.4 each two-way opened for controlling the single-phase AC/AC matrix converter of three-phase -) is exported respectively according to corresponding duty ratio
The control wave of pass.
3. according to claim 1 using the control method of the V2G charger of High Frequency Link matrix converter, which is characterized in that
Step A7) control single-phase bridge full-controlled rectifier device is in rectification state and specifically refers in the single-phase AC/AC matrix converter of three-phase-
The first half cycle of unit switch periods, the corresponding conducting IGBT S of single-phase bridge full-controlled rectifier device1、S4, turn off IGBT S2、S3；?
The later half period of the unit switch periods of the single-phase AC/AC matrix converter of three-phase-, the corresponding conducting of single-phase bridge full-controlled rectifier device
IGBT S2、S3, turn off IGBT S1、S4, thus by the single-phase high frequency alternating current of the output of the single-phase AC/AC matrix converter of three-phase-
Be converted to direct current.
4. a kind of control method of the V2G charger using High Frequency Link matrix converter, the V2G charger is filtered comprising net side
Device, High Frequency Link matrix converter, single-phase bridge full-controlled rectifier device and battery side filter, the High Frequency Link matrix converter packet
Include the single-phase AC/AC matrix converter of three-phase-and high frequency transformer T, the single-phase AC/AC matrixing of the net side filter, three-phase-
Device, high frequency transformer T, single-phase bridge full-controlled rectifier device, battery side filter are sequentially connected, which is characterized in that the V2G charging
Device feed the step of include:
B1) by voltage given valueWith the voltage detecting value u for being electrically charged batterydcCompare and calculates difference
B2) judge differenceWhether less than 0, if differenceIt is jumped less than 0 and executes step B3)；Otherwise, in difference
ValueIt is jumped when more than or equal to 0 and executes step B4)；
B3) determine cell voltage not up to electric discharge lower limit, select and use power limitation control mode, by power given value P*Through formulaBattery current given value is calculatedBy battery current given valueIt is obtained by amplitude limit linkIt will limit
Given value of current value after widthWith detected value idcDifference after being compared inputs outer ring PI controller as outer loop control amount；It jumps
Turn to execute step B5)；
B4) determine that battery reaches electric discharge lower limit, select and use Isobarically Control mode, directly by the differenceAs outer ring control
Amount processed inputs outer ring PI controller；It jumps and executes step B5)；
B5) using the output of outer ring PI controller as current on line side d axis given valueIt will when net side unity power factor control
Current on line side q axis given valueBe set as 0, when need to provide reactive compensation for power grid if by current on line side q axis given valueSetting
For offset；
B6) respectively by current on line side d axis given valueWith the d repacking measured value i of current on line sidesdIt is controlled after being compared as inner ring PI
The input quantity of device processed is controlled, to obtain the d axis component i of reference current vectord, by current on line side q axis given valueWith
The q repacking measured value i of current on line sidesqInput quantity after being compared as inner ring PI controller is controlled, to be referred to
The q axis component i of current phasorq；
B7) in the d axis component i for obtaining reference current vectord, reference current vector q axis component iqOn the basis of, it is respectively adopted
Preset modulation algorithm generates the control wave of the single-phase AC/AC matrix converter of three-phase-；Meanwhile it is complete to control single-phase bridge
Control rectifier is in inverter mode.
5. according to claim 4 using the control method of the V2G charger of High Frequency Link matrix converter, which is characterized in that
Step B7) in using preset modulation algorithm generate the single-phase AC/AC matrix converter of three-phase-control wave detailed step
Suddenly include:
B7.1 a, b, c three-phase current i) are directed toa、ib、icIt is maximum with a phase current absolute value, another biphase current polarity is the same as its phase
It is anti-that 6 sectors are classified as from time domain for rule, by reference current vector6 sectors in a cycle are indicated in complex plane
On, to be in 6 effective switching vector selectors of counter clockwise direction cycle arrangement For boundary；
B7.2 it) uses Bipolar current Space Vector Modulation Strategy: being directed to reference current vectorLocating sector, in preceding half cycle
The input of phase three-phase-single-phase AC/AC matrix converter is forward voltage, using SVPWM method, by reference current vector ii
Two adjacent effective switching vector selectors of locating sector and zero vector synthesize forward current；In later half period three-phase-single-phase AC/AC square
The input of battle array converter is negative voltage, is closed using two opposite with first half cycle effective switching vector selectors and zero vector
At equal in magnitude, contrary electric current, negative is supported, just synthesis electric current identical with first half cycle；
B7.3) according to reference current vectorLocating sector calculates first half cycle two using one of formula (1-1)~(1-6)
The duty ratio d of a effective switching vector selectorx1And dy1And the corresponding duty ratio d of zero vector01, according to reference current vectorLocating
Sector calculates the duty ratio d of the later half period two effective switching vector selectors using one of formula (2-1)~(2-6)x2And dy2And zero
The corresponding duty ratio d of vector02；In formula (1-1)~(1-6) and formula (2-1)~(2-6), miFor the tune of High Frequency Link matrix converter
Coefficient processed, θiFor reference current vector iiPhase angle, dab、dac、dbc、dba、dca、dcbRespectively indicate corresponding switching vector selectorDuty ratio when conducting；daa、dbb、dccRespectively indicate corresponding zero
VectorDuty ratio when conducting；
Formula (1-1) is first half cycle reference current vectorCalculation expression when positioned at I sector；
Formula (1-2) is first half cycle reference current vectorCalculation expression when positioned at Section II sector；
Formula (1-3) is first half cycle reference current vectorCalculation expression when positioned at Section III sector；
Formula (1-4) is first half cycle reference current vectorCalculation expression when positioned at Section IV sector；
Formula (1-5) is first half cycle reference current vectorCalculation expression when positioned at V sector；
Formula (1-6) is first half cycle reference current vectorCalculation expression when positioned at Section VI sector；
Formula (2-1) is later half period reference current vectorCalculation expression when positioned at I sector；
Formula (2-2) is later half period reference current vectorCalculation expression when positioned at Section II sector；
Formula (2-3) is later half period reference current vectorCalculation expression when positioned at Section III sector；
Formula (2-4) is later half period reference current vectorCalculation expression when positioned at Section IV sector；
Formula (2-5) is later half period reference current vectorCalculation expression when positioned at V sector；
Formula (2-6) is later half period reference current vectorCalculation expression when positioned at Section VI sector；
B7.4 each two-way opened for controlling the single-phase AC/AC matrix converter of three-phase -) is exported respectively according to corresponding duty ratio
The control wave of pass.
6. according to claim 4 using the control method of the V2G charger of High Frequency Link matrix converter, which is characterized in that
Step B7) control single-phase bridge full-controlled rectifier device is in inverter mode and specifically refers in the single-phase AC/AC matrix converter of three-phase-
The first half cycle of unit switch periods, the corresponding conducting IGBT S of single-phase bridge full-controlled rectifier device1、S4, turn off IGBT S2、S3；?
The later half period of the unit switch periods of the single-phase AC/AC matrix converter of three-phase-, the corresponding conducting of single-phase bridge full-controlled rectifier device
IGBT S2、S3, turn off IGBT S1、S4, so that the direct current that battery exports is converted to the single-phase alternating current of positive and negative alternation, from
And the input voltage as the single-phase AC/AC matrix converter of three-phase-.
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| CN108155779A (en) * | 2018-01-09 | 2018-06-12 | 青岛大学 | Single-stage current type converter with cascading multiple stages switch L.C. network |
| CN110406406A (en) * | 2018-04-26 | 2019-11-05 | 比亚迪股份有限公司 | Vehicular charger and electric vehicle |
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