CN107379995A - Quick charging system of electric vehicle and method - Google Patents

Quick charging system of electric vehicle and method Download PDF

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Publication number
CN107379995A
CN107379995A CN201710649348.7A CN201710649348A CN107379995A CN 107379995 A CN107379995 A CN 107379995A CN 201710649348 A CN201710649348 A CN 201710649348A CN 107379995 A CN107379995 A CN 107379995A
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China
Prior art keywords
voltage
converter
pulse
synchronous inverter
charging
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CN201710649348.7A
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Chinese (zh)
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CN107379995B (en
Inventor
刘其辉
张怡冰
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North China Electric Power University
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North China Electric Power University
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    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/11—DC charging controlled by the charging station, e.g. mode 4
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • 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
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B60L2210/14—Boost converters
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00711—Regulation of charging or discharging current or voltage with introduction of pulses during the charging process
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention provides quick charging system of electric vehicle and method, including：Stability contorting module, synchronous inverter, pulse control module and DC converter；Synchronous inverter is connected with power network, for being first voltage by the rectification of power network three-phase alternating voltage；DC converter is connected with synchronous inverter, for first voltage to be converted into second voltage；Pulse control module is connected with DC converter, for controlling DC converter to be charged using pulse charging manner to the electrokinetic cell of electric automobile, wherein, provide charging current by second voltage for electrokinetic cell；Stability contorting module is connected with synchronous inverter, for during power battery charging, the first voltage of control synchronous inverter output to keep constant.The present invention is controlled by stability contorting module to synchronous inverter, so as to stabilize instantaneous power fluctuation problem during pulse charge, mitigates the adverse effect to the power network quality of power supply significantly.

Description

Quick charging system of electric vehicle and method
Technical field
The present invention relates to charging electric vehicle technical field, more particularly, to quick charging system of electric vehicle and method.
Background technology
The charging modes of existing electric automobile are broadly divided into two classes, and one kind is normal charge mode, including constant-current charge, Constant-voltage charge and charge stage by stage；Another kind of is quick charge mode, including pulse charge, intermittent charge, power transformation current charge etc. Mode.With the continuous development of electric automobile, rapid nitriding more disclosure satisfy that people for normal charge mode Trip requirements, it is convenient for people to use.
In actual applications, the pulse charging manner in quick charge is most widely used.It can effectively shorten electronic In the automobile charging interval, it can produce very big instantaneous power fluctuation in a charge cycle, although the duration is short, but its Influence to power network can not be ignored, and according to traditional quick charging system, power network current can be caused drastically to change, to electric energy matter Amount has a negative impact.
The content of the invention
In view of this, it is an object of the invention to provide quick charging system of electric vehicle and method, stability contorting is passed through Module is controlled to synchronous inverter, so as to stabilize instantaneous power fluctuation problem during pulse charge, is significantly reduced pair The adverse effect of the power network quality of power supply.
In a first aspect, the embodiments of the invention provide quick charging system of electric vehicle, including：It is stability contorting module, same Walk inverter, pulse control module and DC converter；
The synchronous inverter, is connected with power network, for being first voltage by the rectification of power network three-phase alternating voltage, and will The first voltage is exported to the DC converter；
The DC converter, it is connected with the synchronous inverter, for the first voltage to be converted into the second electricity Pressure, wherein, the second voltage is less than the first voltage；
The pulse control module, it is connected with the DC converter, for controlling the DC converter to use arteries and veins Charging modes are rushed to charge to the electrokinetic cell of the electric automobile, wherein, it is the power electric by the second voltage Pond provides charging current；
The stability contorting module, is connected with the synchronous inverter, for during the power battery charging, The virtual voltage of the synchronous inverter output is measured, and according to the virtual voltage and the mathematic interpolation of the first voltage The drive signal of the synchronous inverter is obtained, controls the synchronous inverter to export first electricity by the drive signal Pressure.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the first of first aspect, wherein, institute Pulse control module is stated to be additionally operable to set charging current reference value；
When the current reference value is more than 0, the pulse control module controls the DC converter to the power Battery carries out positive pulse charging；
When the current reference value is less than 0, the pulse control module controls the DC converter to the power Battery carries out negative pulse charging；
When the current reference value is equal to 0, the pulse control module controls the DC converter to stop to described Electrokinetic cell is charged.
With reference to the first possible embodiment of first aspect, the embodiments of the invention provide second of first aspect Possible embodiment, wherein, the pulse control module is additionally operable to measure the actual current of the DC converter, by described in Actual current and the current reference value are compared to obtain pulse drive signal, by described in pulse drive signal driving DC converter.
With reference to the first possible embodiment of first aspect, the embodiments of the invention provide the third of first aspect Possible embodiment, wherein, the pulse control module is additionally operable to set charge cycle, the positive negative pulse stuffing of the electrokinetic cell The proportioning of charging current amplitude and positive negative pulse stuffing.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the 4th of first aspect kind, wherein, institute State stability contorting module to be additionally operable to be calculated according to the difference of the virtual voltage and the first voltage, obtain described same The virtual angle of inverter is walked, the virtual video gesture of the virtual angle and the synchronous inverter is controlled by PWM To the drive signal.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the 5th of first aspect kind, wherein, also Including stabilizing circuit, it is connected respectively with the synchronous inverter and the DC converter, for exporting described in stabilization First voltage gives the DC converter.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the 6th of first aspect kind, wherein, institute Stating stability contorting module includes inertia control unit, the inertia control unit be used for for the synchronous inverter provide inertia with Damping.
Second aspect, the embodiment of the present invention also provide electric vehicle rapid charging method, including：
By the rectification of power network three-phase alternating voltage it is first voltage by synchronous inverter；
The first voltage is converted into by second voltage by DC converter, wherein, the second voltage is less than described First voltage；
The DC converter is controlled to be charged using pulse charging manner to the electrokinetic cell, wherein, pass through institute State second voltage and provide charging current for the electrokinetic cell；
During the power battery charging, the virtual voltage of the synchronous inverter output is measured, and passes through and compares The virtual voltage and the first voltage obtain the drive signal of the synchronous inverter；
The synchronous inverter is controlled to export the first voltage by the drive signal.
With reference to second aspect, the embodiments of the invention provide the possible embodiment of the first of second aspect, wherein, also Including：
Set charging current reference value；
When the current reference value is more than 0, controls the DC converter to carry out positive pulse to the electrokinetic cell and fill Electricity；
When the current reference value is less than 0, controls the DC converter to carry out negative pulse to the electrokinetic cell and fill Electricity；
When the current reference value is equal to 0, module controls the DC converter to stop carrying out the electrokinetic cell Charging.
With reference to the first possible embodiment of second aspect, the embodiments of the invention provide second of second aspect Possible embodiment, wherein, in addition to：
The actual current of the DC converter is measured, the actual current and the current reference value are compared To pulse drive signal；
The DC converter is driven by the pulse drive signal.
The embodiments of the invention provide quick charging system of electric vehicle and method, the system includes：Stability contorting module, Synchronous inverter, pulse control module and DC converter；Synchronous inverter is connected with power network, for power network three to be intersected Stream voltage commutation is first voltage；DC converter is connected with synchronous inverter, for first voltage to be converted into the second electricity Pressure；Pulse control module is connected with DC converter, for controlling DC converter using pulse charging manner to electronic vapour The electrokinetic cell of car is charged, wherein, provide charging current by second voltage for electrokinetic cell；Stability contorting module with it is same Step inverter is connected, for during power battery charging, the first voltage of control synchronous inverter output to keep constant. Synchronous inverter is controlled by stability contorting module, so as to stabilize instantaneous power fluctuation problem during pulse charge, Mitigate the adverse effect to the power network quality of power supply significantly.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages are in specification, claims And specifically noted structure is realized and obtained in accompanying drawing.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate Appended accompanying drawing, is described in detail below.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram for the quick charging system of electric vehicle that the embodiment of the present invention one provides；
Fig. 2 is another schematic diagram for the quick charging system of electric vehicle that the embodiment of the present invention one provides；
Fig. 3 is the circuit controling drawing for the quick charging system of electric vehicle that the embodiment of the present invention one provides；
Fig. 4 is the electric vehicle rapid charging method flow diagram that the embodiment of the present invention two provides.
Icon：
10- synchronous inverters；20- DC converters；30- stability contorting modules；40- pulse control modules；The stable electricity of 50- Road.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing to the present invention Technical scheme be clearly and completely described, it is clear that described embodiment is part of the embodiment of the present invention, rather than Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise Lower obtained every other embodiment, belongs to the scope of protection of the invention.
At present in actual applications, when the pulse charging manner in quick charge can effectively shorten charging electric vehicle Between, it can produce very big instantaneous power fluctuation in a charge cycle, although the duration is short, but its shadow to power network Sound can not be ignored, and according to traditional quick charging system, power network current can be caused drastically to change, and it is unfavorable that the quality of power supply is produced Influence.Based on this, quick charging system of electric vehicle provided in an embodiment of the present invention and method, by stability contorting module to same Step inverter is controlled, and so as to stabilize instantaneous power fluctuation problem during pulse charge, is significantly reduced to power network electric energy The adverse effect of quality.
For ease of understanding the present embodiment, first to the electric vehicle rapid charging system disclosed in the embodiment of the present invention System describes in detail.
Embodiment one：
Fig. 1 is the schematic diagram for the quick charging system of electric vehicle that the embodiment of the present invention one provides.
Reference picture 1, quick charging system of electric vehicle, including：Stability contorting module 30, synchronous inverter 10, pulse control Molding block 40 and DC converter 20；
Synchronous inverter 10, is connected with power network, for being first voltage by the rectification of power network three-phase alternating voltage, and by One voltage output is to DC converter 20；
DC converter 20, it is connected with synchronous inverter 10, for first voltage to be converted into second voltage, wherein, Second voltage is less than first voltage；
Specifically, synchronous inverter 10 includes the rectification circuit hand over-directly converted, and DC converter 20 includes straight-straight conversion Current reversibility type buck translation circuit.Wherein, synchronous inverter 10 is connected with power network, can be by power network three-phase alternating voltage Rectification is 600V DC voltages；600V DC voltages are converted into 50V DC voltages by DC converter 20, and electric automobile is dynamic Power battery is joined directly together.
Pulse control module 40, it is connected with DC converter 20, for controlling DC converter 20 to use pulse charge Mode charges to the electrokinetic cell of electric automobile, wherein, provide charging current by second voltage for electrokinetic cell；
Here by pulse charging manner, i.e. positive negative pulse stuffing quick charge mode, including charging and short time electric discharge and Stop the process of filling, the two-way flow of energy is realized by discharge process；And short time electric discharge and stop the process of filling and can eliminate electricity Polarization phenomena inside pond, reduce gassing rate, break through the less and less limitation of battery current limit in charging process, improve electricity The extreme value of pond charging current, be advantageous to the realization of electric vehicle rapid charging target, improve charge efficiency.
Stability contorting module 30, it is connected with synchronous inverter 10, for during power battery charging, measurement to be synchronous The virtual voltage that inverter 10 exports, and synchronous inverter 10 is obtained according to the mathematic interpolation of virtual voltage and first voltage Drive signal, synchronous inverter 10 is controlled to export first voltage by drive signal.
As shown in figure 3, VT1~VT6Form synchronous inverter 10, VT7And VT8Form DC converter 20, synchronous inverter 10 stability contorting module 30 includes computing module, real power control module, inertia control module and idle control module four Point, it is to ensure DC-side Voltage Stabilization the purpose of the control of real power control module；The main purpose of inertia control module is for system Inertia and damping are provided, suppress power swing, improves the grid-connected stationarity for exchanging power；The purpose of idle control module is to ensure Commutation system grid entry point voltage it is constant.
Computing module can calculate reactive power, electromagnetic power and virtual video gesture.Specific formula for calculation such as (1), (2), (3) and (4)：
Wherein, MfifFor hypothetical rotor magnetic linkage, igFor power network current, angle, θ can be integrated to obtain by virtual angular frequency, empty Intending angular frequency can be obtained by inertia control module.Q is actual reactive power, and e is virtual video gesture.
The purpose of real power control module is to ensure that DC voltage is constant, and the module can obtain having for synchronous inverter 10 Work(power instruction Pm。VrefFor the reference DC voltage value of commutation system, V is the measured value of the DC voltage of commutation system, KpFor Proportionality coefficient.When error be present in DC voltage amplitude and its reference value, i.e. Δ V=VrefDuring-V, P is calculatedm=Δ V*Kp, obtain P is instructed to actual active powerm。
Inertia control module simulation synchronous generator rotor adjusts process, its mathematical modeling such as formula (5)：
Wherein, electromagnetic torque TeWith machine torque TmIt can be obtained by below equation (6)：
Pe=Kpsinδ
Tm=Pm/ω0
Te=Pe/ω0 (6)
In above-mentioned model, ω0For electrical network angular frequency, ω is 10 virtual angular frequency of synchronous inverter, and δ is operation generator rotor angle；J For virtual inertia time constant, the size of inertia is contained in sign system；TeFor electromagnetic torque, as synchronous inverter 10 with Load the torque corresponding to the power exchanged；TmFor machine torque, i.e., corresponding to the power that synchronous inverter 10 exchanges with power network Torque；Torque can be by power divided by ω0Obtain.KdFor damped coefficient, KpIt can be exchanged with power network for synchronous inverter 10 quiet State power limit.
Inertia control module instructs P in control process, by actual active powermWith electromagnetic power PeMake the difference, divided by power network Angular frequency0, obtain torque difference.According to formulaAbove-mentioned torque difference is done with damping torque Difference, divided by inertia time constant J, and virtual angular frequency is obtained by integral element.Virtual angular frequency by integral element, Angle, θ can be obtained, it is specific as shown in Figure 3.
In idle control module, as shown in figure 3, QrefFor given idle reference value, Q is actual reactive power, VmFor Reference output voltage, emFor virtual synchronous machine system output voltage, KqFor idle-voltage regulation coefficient, parameter K controls with voltage The response speed of loop is relevant, and K is smaller, and response speed is faster.Reference output voltage VmWith virtual synchronous machine system output voltage em It is poor to make, and is multiplied by Kq, for the adjustment of field excitation process of grid-connection control system.After adjustment of field excitation and integral element, virtually turned Sub- magnetic linkage Mfif.Virtual video gesture e can be obtained by above-mentioned computing module again.
Further, pulse control module 40 is additionally operable to set charging current reference value；
When current reference value is more than 0, pulse control module 40 controls DC converter 20 to carry out positive arteries and veins to electrokinetic cell Punching charging；
When current reference value is less than 0, pulse control module 40 controls DC converter 20 to carry out negative arteries and veins to electrokinetic cell Punching charging；
When current reference value is equal to 0, pulse control module 40 controls DC converter 20 to stop carrying out electrokinetic cell Charging.
Further, pulse control module 40 is additionally operable to measure the actual current of DC converter 20, by actual current and Current reference value is compared to obtain pulse drive signal, and DC converter 20 is driven by pulse drive signal.
Further, pulse control module 40 is additionally operable to set charge cycle, the positive negative pulse stuffing charging current of electrokinetic cell The proportioning of amplitude and positive negative pulse stuffing.
Specifically, the control process of DC converter 20 is as follows：
Step 1, as shown in figure 1, according to actual electrokinetic cell demand, setting charging electric vehicle cycle, positive negative pulse stuffing fill The proportioning of electric current amplitude and positive negative pulse stuffing.
Step 2, setting are completed, and electric automobile starts to charge up.When charging starts, pulse control module 40 provides charging electricity Flow reference value I*.Work as I*>When 0, charged for positive pulse, electrokinetic cell is charged；Work as I*When=0, to stop filling link, to dynamic Power battery neither charges nor discharged；Work as I*<When 0, it is negative pulse charging, electrokinetic cell is discharged.As shown in figure 3, from Electric current I is measured in DC converter 20, with current reference value I*Make it is poor, by difference input PI controllers in, then with triangular carrier Make ratio, 0 or 1 pulse drive signal is then obtained in input comparator, then the pulse drive signal is sent to VT7And VT8 In, control the operation of DC converter 20.
Further, stability contorting module 30 is additionally operable to be calculated according to the difference of virtual voltage and first voltage, The virtual angle of synchronous inverter 10 is obtained, the virtual video gesture of virtual angle and synchronous inverter 10 is controlled by PWM Obtain drive signal.
Specifically, the control process of synchronous inverter 10 is as follows：
Step 1, VrefFor the reference DC voltage value (i.e. above-mentioned first voltage) of synchronous inverter 10, V is synchronous inversion The measured value of the DC voltage of device 10, KpFor proportionality coefficient.When error be present in DC voltage amplitude and its reference value, i.e. Δ V=VrefDuring-V, pass through Pm=Δ V*KpCalculate, obtain actual active-power Pm。
Step 2, by actual active-power PmThe electromagnetic power P obtained with computing moduleeMake the difference, divided by electrical network angular frequency ω0, obtain torque difference.According to formulaAbove-mentioned torque difference is made the difference with damping torque, removed With inertia time constant J, and virtual angular frequency is obtained by integral element.By integral element, angle, θ can be obtained.
Step 3, reference output voltage VmWith virtual synchronous machine system output voltage emIt is poor to make, and is multiplied by Kq, it is virtual synchronous The adjustment of field excitation process of machine system.Idle Q is referred to by givenrefIt is poor that the actual reactive power Q obtained with computing module is made, warp Overexcitation is adjusted with after integral element, obtains hypothetical rotor magnetic linkage Mfif.Virtual video gesture e can be obtained by computing module again.
Step 4, angle, θ and virtual video gesture e are delivered to PWM controlling units, obtain VT1~VT6Driving pulse, control The operation of synchronous inverter 10 processed.
Further, as shown in Fig. 2 also including stabilizing circuit 50, respectively with synchronous inverter 10 and DC converter 20 are connected, for exporting stable first voltage to DC converter 20.Such as the electric capacity C in Fig. 31, it acts on i.e. stable The output voltage of synchronous inverter 10.
Further, stability contorting module 30 includes inertia control unit, and it is synchronous inverter that inertia control unit, which is used for, 10 provide inertia and damping.
In the positive negative pulse stuffing charge and discharge process that synchronous inverter 10 is applied in the embodiment of the present invention, in the negative pulse stage, electricity Current on line side does not change, and is held essentially constant.This is due to during battery negative pulse charging, although power produces Momentary fluctuation, but pass through synchronous inverter 10, its fluctuation of inertia damping link to power generates inhibitory action, effectively disappeared The fluctuation of instantaneous power is received, so as to effectively suppress impact of the negative pulse charging process to power network, it is fast to reduce electric automobile Fill adverse effect of the process to the power network quality of power supply.
Embodiment two：
Fig. 4 is the electric vehicle rapid charging method flow diagram that the embodiment of the present invention two provides.
Reference picture 4, electric vehicle rapid charging method, including：
Step S101, by the rectification of power network three-phase alternating voltage it is first voltage by synchronous inverter；
Step S102, first voltage is converted into by second voltage by DC converter, wherein, second voltage is less than first Voltage；
Step S103, control DC converter are charged using pulse charging manner to electrokinetic cell, wherein, by the Two voltages provide charging current for electrokinetic cell；
Step S104, during power battery charging, the virtual voltage of measurement synchronous inverter output, and pass through and compare Virtual voltage and first voltage obtain the drive signal of synchronous inverter；
Step S105, synchronous inverter is controlled to export first voltage by drive signal.
Further, in addition to：
Set charging current reference value；
When current reference value is more than 0, control DC converter carries out positive pulse charging to electrokinetic cell；
When current reference value is less than 0, control DC converter carries out negative pulse charging to electrokinetic cell；
When current reference value is equal to 0, module control DC converter stops charging to electrokinetic cell.
Further, in addition to：
The actual current of DC converter is measured, actual current and current reference value are compared to obtain pulsed drive letter Number；
DC converter is driven by pulse drive signal.
Electric vehicle rapid charging method provided in an embodiment of the present invention, the electric automobile provided with above-described embodiment are quick Charging system has identical technical characteristic, so can also solve identical technical problem, reaches identical technique effect.
The embodiments of the invention provide quick charging system of electric vehicle and method, the system includes：Stability contorting module, Synchronous inverter, pulse control module and DC converter；Synchronous inverter is connected with power network, for power network three to be intersected Stream voltage commutation is first voltage；DC converter is connected with synchronous inverter, for first voltage to be converted into the second electricity Pressure；Pulse control module is connected with DC converter, for controlling DC converter using pulse charging manner to electronic vapour The electrokinetic cell of car is charged, wherein, provide charging current by second voltage for electrokinetic cell；Stability contorting module with it is same Step inverter is connected, for during power battery charging, the first voltage of control synchronous inverter output to keep constant. Synchronous inverter is controlled by stability contorting module, so as to stabilize instantaneous power fluctuation problem during pulse charge, Mitigate the adverse effect to the power network quality of power supply significantly.
In addition, in the description of the embodiment of the present invention, unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this Concrete meaning in invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ", The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to Be easy to the description present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation, With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ", " the 3rd " is only used for describing purpose, and it is not intended that instruction or hint relative importance.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit, the corresponding process in preceding method embodiment is may be referred to, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, can be with Realize by another way.Device embodiment described above is only schematical, for example, the division of the unit, Only a kind of division of logic function, can there is other dividing mode when actually realizing, in another example, multiple units or component can To combine or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, it is shown or beg for The mutual coupling of opinion or direct-coupling or communication connection can be by some communication interfaces, device or unit it is indirect Coupling or communication connection, can be electrical, mechanical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs 's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also That unit is individually physically present, can also two or more units it is integrated in a unit.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with It is stored in the executable non-volatile computer read/write memory medium of a processor.Based on such understanding, the present invention The part that is substantially contributed in other words to prior art of technical scheme or the part of the technical scheme can be with software The form of product is embodied, and the computer software product is stored in a storage medium, including some instructions are causing One computer equipment (can be personal computer, server, or network equipment etc.) performs each embodiment institute of the present invention State all or part of step of method.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read- Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with The medium of store program codes.
Finally it should be noted that：Embodiment described above, it is only the embodiment of the present invention, to illustrate the present invention Technical scheme, rather than its limitations, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair It is bright to be described in detail, it will be understood by those within the art that：Any one skilled in the art The invention discloses technical scope in, it can still modify to the technical scheme described in previous embodiment or can be light Change is readily conceivable that, or equivalent substitution is carried out to which part technical characteristic；And these modifications, change or replacement, do not make The essence of appropriate technical solution departs from the spirit and scope of technical scheme of the embodiment of the present invention, should all cover the protection in the present invention Within the scope of.Therefore, protection scope of the present invention described should be defined by scope of the claims.

Claims (10)

  1. A kind of 1. quick charging system of electric vehicle, it is characterised in that including：Stability contorting module, synchronous inverter, pulse control Molding block and DC converter, wherein, the stability contorting module includes inertia control unit；
    The synchronous inverter, is connected with power network, for being first voltage by the rectification of power network three-phase alternating voltage, and by described in First voltage is exported to the DC converter；
    The DC converter, it is connected with the synchronous inverter, for the first voltage to be converted into second voltage, its In, the second voltage is less than the first voltage；
    The pulse control module, it is connected with the DC converter, for controlling the DC converter to be filled using pulse Electrically the electrokinetic cell of the electric automobile is charged, wherein, it is that the electrokinetic cell carries by the second voltage For charging current；
    The stability contorting module, is connected with the synchronous inverter, for during the power battery charging, measuring The virtual voltage of the synchronous inverter output, and obtained according to the mathematic interpolation of the virtual voltage and the first voltage The drive signal of the synchronous inverter, the synchronous inverter is controlled to export the first voltage by the drive signal.
  2. 2. quick charging system of electric vehicle according to claim 1, it is characterised in that the pulse control module is also used In setting charging current reference value；
    When the current reference value is more than 0, the pulse control module controls the DC converter to the electrokinetic cell Carry out positive pulse charging；
    When the current reference value is less than 0, the pulse control module controls the DC converter to the electrokinetic cell Carry out negative pulse charging；
    When the current reference value is equal to 0, the pulse control module controls the DC converter to stop to the power Battery is charged.
  3. 3. quick charging system of electric vehicle according to claim 2, it is characterised in that the pulse control module is also used In the actual current for measuring the DC converter, the actual current and the current reference value are compared to obtain pulse Drive signal, the DC converter is driven by the pulse drive signal.
  4. 4. quick charging system of electric vehicle according to claim 2, it is characterised in that the pulse control module is also used In the proportioning of the charge cycle of the setting electrokinetic cell, positive negative pulse stuffing charging current amplitude and positive negative pulse stuffing.
  5. 5. quick charging system of electric vehicle according to claim 1, it is characterised in that the stability contorting module is also used Calculated according to the difference of the virtual voltage and the first voltage, obtain the virtual angle of the synchronous inverter Degree, the virtual angle and the virtual video gesture of the synchronous inverter are controlled by PWM to obtain the drive signal.
  6. 6. quick charging system of electric vehicle according to claim 1, it is characterised in that also including stabilizing circuit, difference It is connected with the synchronous inverter and the DC converter, for exporting the stable first voltage to the direct current Converter.
  7. 7. quick charging system of electric vehicle according to claim 1, it is characterised in that the stability contorting module includes Inertia control unit, the inertia control unit are used to provide inertia and damping for the synchronous inverter.
  8. A kind of 8. electric vehicle rapid charging method, it is characterised in that including：
    By the rectification of power network three-phase alternating voltage it is first voltage by synchronous inverter；
    The first voltage is converted into by second voltage by DC converter, wherein, the second voltage is less than described first Voltage；
    The DC converter is controlled to be charged using pulse charging manner to electrokinetic cell, wherein, pass through the described second electricity Press and provide charging current for the electrokinetic cell；
    During the power battery charging, the virtual voltage of the synchronous inverter output is measured, and by described in comparison Virtual voltage and the first voltage obtain the drive signal of the synchronous inverter；
    The synchronous inverter is controlled to export the first voltage by the drive signal.
  9. 9. electric vehicle rapid charging method according to claim 8, it is characterised in that also include：
    Set charging current reference value；
    When the current reference value is more than 0, the DC converter is controlled to carry out positive pulse charging to the electrokinetic cell；
    When the current reference value is less than 0, the DC converter is controlled to carry out negative pulse charging to the electrokinetic cell；
    When the current reference value is equal to 0, module controls the DC converter to stop charging to the electrokinetic cell.
  10. 10. electric vehicle rapid charging method according to claim 9, it is characterised in that also include：
    The actual current of the DC converter is measured, the actual current and the current reference value are compared to obtain arteries and veins Rush drive signal；
    The DC converter is driven by the pulse drive signal.
CN201710649348.7A 2017-08-01 2017-08-01 Electric automobile quick charging system and method Expired - Fee Related CN107379995B (en)

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CN103427702A (en) * 2013-08-30 2013-12-04 华南理工大学 Digitization power system capable of achieving positive and negative pulse combination quick-acting charging of electric car
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JPH07322524A (en) * 1994-05-18 1995-12-08 Toyota Autom Loom Works Ltd Power-supply circuit
CN2535961Y (en) * 2002-04-04 2003-02-12 合肥阳光电源有限公司 Storage battery sine-wave net-merging charging/discharging device
CN101145697A (en) * 2007-09-21 2008-03-19 北京交通大学 Accumulator multi-unit synchronous charging/discharging device and its method
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