CN110212791A - A kind of electrical energy changer applied to electric vehicle rapid charging - Google Patents

A kind of electrical energy changer applied to electric vehicle rapid charging Download PDF

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Publication number
CN110212791A
CN110212791A CN201910039635.5A CN201910039635A CN110212791A CN 110212791 A CN110212791 A CN 110212791A CN 201910039635 A CN201910039635 A CN 201910039635A CN 110212791 A CN110212791 A CN 110212791A
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China
Prior art keywords
phase
winding
endpoint
connection type
convertor
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CN201910039635.5A
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Chinese (zh)
Inventor
孟凡刚
杜青筱
高蕾
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Harbin Institute of Technology Weihai
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Harbin Institute of Technology Weihai
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Priority to CN201910039635.5A priority Critical patent/CN110212791A/en
Publication of CN110212791A publication Critical patent/CN110212791A/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
    • 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
    • H02M5/10—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 transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • 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
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The present invention provides a kind of electrical energy changers applied to electric vehicle rapid charging, belong to power electronics field.The present invention is made of three groups of cascade connection type direct AC convertors, three groups of LC filters, three three winding isolated form transformers, two groups of three-phase diode rectifier bridges, paralleing reactors.Three-phase main-frequency convert alternating current is three-phase high-frequency alternating current by three groups of cascade connection type direct AC convertors, three groups of LC filters；The input side of three groups of cascade connection type direct AC convertors uses n single-phase diode rectifier bridge cascade connection type, is directly connected to middle pressure AC network, can reduce the occupied area and cost of charging station；Three three winding isolated form transformers, two groups of three-phase diode rectifier bridges, paralleing reactor form 12 Pulses Rectifier of parallel connection type, can export high current, improve the charging rate of battery.

Description

A kind of electrical energy changer applied to electric vehicle rapid charging
Technical field
The present invention relates to a kind of electrical energy changers applied to electric vehicle rapid charging, belong to power electronic technique neck Domain.
Background technique
Electric car can effectively reduce consumption of petroleum and exhaust gas discharge, it has also become the hot spot of current auto industry research. Sound, perfect electrically-charging equipment is the universal key factor of electric car；In large-scale ground charging station, transformation of electrical energy dress Set the occupied area and cost of the charging rate, charging station that largely decide electric car.
The charging modes of electric car mainly include normal charge mode and quick charge mode two major classes.It is filled using conventional When electric mode, the power of electrical energy changer and electric current are all smaller in charging station, and the charging time is longer, can use night electricity consumption It charges when low ebb to electric car, but which is difficult to meet the requirement of electric vehicle rapid charging.Using quickly filling When electric mode, charging current is larger, and the charging time is only 5~120 minutes, and it is insufficient can effectively to solve electric car course continuation mileage Problem.But quick charge mode can reduce the service life of battery, while safety to charging station and technical requirements compared with It is high.The realization of rapid nitriding depends primarily in the maximum current and charging station that battery is able to bear within the unit time The volume and cost of electrical energy changer.
Electrical energy changer in existing charging station mainly includes distribution transformer, filter, uncontrollable rectifier device, high frequency The parts such as DC-DC converter.The preceding termination 10/35kV power grid of distribution transformer, is transformed to 380V alternating current for 10/35kV.? In existing charging station, the volume and cost of power frequency distribution transformer account for a big chunk of charging station total occupied area and cost, The occupied area and cost of charging station will be significantly reduced without using power frequency distribution transformer.
The present invention provides a kind of electrical energy changer applied to electric vehicle rapid charging, when use the device as When electrical energy changer in charging station, power frequency distribution transformer is not used not only, additionally it is possible to provide biggish charging for battery Electric current accelerates charging rate, advantageously reduces the occupied area and cost of charging station.
Summary of the invention
The purpose of the present invention is to solve the above-mentioned problems of the prior art, and then provide a kind of applied to electronic vapour The electrical energy changer of vehicle quick charge.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of electrical energy changer applied to electric vehicle rapid charging, it is described applied to electric vehicle rapid charging Electrical energy changer includes a phase cascade connection type direct AC convertor, b phase cascade connection type direct AC convertor, c phase cascade connection type friendship-alternating flow Device, a phase LC filter, b phase LC filter, c phase LC filter, a phase three winding isolated form transformer, b phase three winding isolated form Transformer, c phase three winding isolated form transformer, first group of three-phase rectification bridge, second group of three-phase rectification bridge and paralleing reactor, a Phase cascade connection type direct AC convertor, b phase cascade connection type direct AC convertor are exchanged with the input of c phase cascade connection type direct AC convertor termination Power grid；The output end of a phase cascade connection type direct AC convertor, b phase cascade connection type direct AC convertor and c phase cascade connection type direct AC convertor It is connected respectively with a phase LC filter, b phase LC filter and c phase LC filter；A phase LC filter, b phase LC filter and c phase LC The output end of filter respectively with a phase three winding isolated form transformer, b phase three winding isolated form transformer and c phase three winding every The primary side winding of release transformer is connected；A is separated by release transformer, b is separated by release transformer and c is separated by release transformer output Two groups there are the high-frequency alternating current of 30 ° of phase differences, two groups of high-frequency alternating currents to be separately input to first group of three-phase rectification bridge and second The anode of group three-phase rectification bridge, first group of three-phase rectification bridge and second group of three-phase rectification bridge is connect with paralleing reactor respectively, the One end of the cathode and load of one group of three-phase rectification bridge and second group of three-phase rectification bridge connects, the other end of load and balance reactance The midpoint of device connects.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, a phase cascade connection type friendship-alternating flow Device, b phase cascade connection type direct AC convertor and c phase cascade connection type direct AC convertor all include n single-phase diode rectifier bridge, n The input side of Boost and n H bridge three parts, n single-phase diode rectifier bridge is connected using cascade system, each The outlet side of single-phase diode rectifier bridge connects a Boost, outlet side and the H bridge of each Boost DC side connection, the outlet side of n H bridge of each phase is using cascade system connection.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, a phase cascade connection type friendship-alternating flow In device, b phase cascade connection type direct AC convertor and c phase cascade connection type direct AC convertor, n Boost uses identical control Mode, Boost is according to the adjustable DC voltage of requirement output amplitude of charging curve；Not according to used switching tube Together, there are two types of control modes for n H bridge, and when using silicon substrate MOSFET or IGBT, n H bridge is using square wave phase shifting control, when making When with broad stopband switching tube, n H bridge is controlled using PWM.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, a phase LC filter, b phase LC Filter and c phase LC filter all include an inductance and a capacitor.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, a are separated by release transformer, b Be separated by release transformer and c to be separated by release transformer all include Nx1、Nx2、Nx3Three windings and x are a, b or c, wherein Nx1For original Side winding, Nx2、Nx3For vice-side winding；Each umber of turn meets Na1=Nb1=Nc1、Na2=Nb2=Nc2、Na3=Nb3=Nc3；Around Group Na2Endpoint a2, winding Nb2Endpoint b2, winding Nc2Endpoint c2It is connected to point o；Winding Na2Endpoint a3With first group three The R of commutating phase bridge1aPoint is connected, winding Nb2Endpoint b3With the R of first group of three-phase rectification bridge1bPoint is connected, winding Nc2Endpoint c3 With the R of first group of three-phase rectification bridge1cPoint is connected；Na3Endpoint a4With winding Nb3Endpoint b5It is connected, Nb3Endpoint b4With winding Nc3Endpoint c5It is connected, Nc3Endpoint c4With winding Na3Endpoint a5It is connected；Winding Na5Endpoint a5With second group of three phase rectifier The R of bridge2aPoint is connected, winding Nb5Endpoint b5With the R of second group of three-phase rectification bridge2bPoint is connected, winding Nc5Endpoint c5With second The R of group three-phase rectification bridge2cPoint is connected.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, first group of three-phase rectification bridge Cathode endpoint R1-, second group of three-phase rectification bridge cathode endpoint R2-, load cathode be connected, endpoint N；First group of three-phase is whole Flow the positive endpoint R of bridge1+It is connected with the endpoint Q of paralleing reactor, the positive endpoint R of second group of three-phase rectification bridge2+With balance electricity The endpoint P of anti-device is connected；Paralleing reactor is connected around class mid point with the anode of load, endpoint M.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, a phase three winding isolated form become Depressor, b phase three winding isolated form transformer and c phase three winding isolated form transformer are high-frequency isolation transformer.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, a phase three winding isolated form become Depressor, b phase three winding isolated form transformer, c phase three winding isolated form transformer, first group of three-phase rectification bridge, second group of three-phase Rectifier bridge and paralleing reactor form 12 Pulses Rectifier of parallel connection type.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, a phase cascade connection type friendship-alternating flow Device, b phase cascade connection type direct AC convertor are identical with the structure of c phase cascade connection type direct AC convertor, a phase LC filter, b phase LC filtering Device is identical with the structure of c phase LC filter, a phase three winding isolated form transformer, b phase three winding isolated form transformer and c phase three The structure of winding isolated form transformer is identical；Cascade connection type direct AC convertor, LC filter, the three winding isolated form of each phase become Depressor constitutes a module, a phase direct AC convertor, b phase direct AC convertor, c phase direct AC convertor, a phase LC filter, b Phase LC filter, c phase LC filter, a is separated by release transformer, b is separated by release transformer and c is separated by the function of release transformer It is realized using three identical modules.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, the input of the electrical energy changer The middle pressure AC network of side connection 10/35kV.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, the input side of electrical energy changer are straight It connects and is connect with 10/35kV power grid, do not use power frequency distribution transformer, can reduce the occupied area and cost of charging station, three Winding isolation transformer works in high frequency state, also can reduce the occupied area of charging station；Cascade connection type friendship-alternation of each phase It is all the same to flow device, LC filter, three winding isolated form transformer device structure, can be realized modularized design.
Detailed description of the invention
Fig. 1 is a kind of topological diagram of the electrical energy changer applied to electric vehicle rapid charging of the present invention.
Appended drawing reference in figure has: 1 is a phase cascade connection type direct AC convertor；2 be b phase cascade connection type direct AC convertor；3 be c Phase cascade connection type direct AC convertor；4 be a phase LC filter；5 be b phase LC filter；6 be c phase LC filter；7 be a phase three winding Isolated form transformer；8 be b phase three winding isolated form transformer；9 be c phase three winding isolated form transformer；10 be first group of three-phase Rectifier bridge；11 be second group of three-phase rectification bridge；12 be paralleing reactor.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in further detail: the present embodiment is being with technical solution of the present invention Under the premise of implemented, give detailed embodiment, but protection scope of the present invention is not limited to following embodiments.
Embodiment one: as shown in Figure 1, a kind of electric energy change applied to electric vehicle rapid charging involved in the present embodiment Changing device, including a phase cascade connection type direct AC convertor, b phase cascade connection type direct AC convertor, c phase cascade connection type direct AC convertor, a phase LC filter, b phase LC filter, c phase LC filter, a phase three winding isolated form transformer, b phase three winding isolated form transformer, C phase three winding isolated form transformer, first group of three-phase rectification bridge, second group of three-phase rectification bridge and paralleing reactor, a phase cascade connection type The input of direct AC convertor, b phase cascade connection type direct AC convertor and c phase cascade connection type direct AC convertor terminates AC network；A phase The output end of cascade connection type direct AC convertor, b phase cascade connection type direct AC convertor and c phase cascade connection type direct AC convertor respectively with a phase LC filter, b phase LC filter are connected with c phase LC filter；A phase LC filter, b phase LC filter and c phase LC filter Output end respectively with a phase three winding isolated form transformer, b phase three winding isolated form transformer and c phase three winding isolated form transformation The primary side winding of device is connected；A is separated by release transformer, b is separated by release transformer and c is separated by release transformer and exports two groups of presence The high-frequency alternating current of 30 ° of phase differences, two groups of high-frequency alternating currents are separately input to first group of three-phase rectification bridge and second group of three-phase is whole Bridge is flowed, first group of three-phase rectification bridge and second group of the positive of three-phase rectification bridge connect with paralleing reactor respectively, first group of three-phase One end of the cathode and load of rectifier bridge and second group of three-phase rectification bridge connects, the other end of load and the midpoint of paralleing reactor Connection.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, a phase cascade connection type friendship-alternating flow Device, b phase cascade connection type direct AC convertor and c phase cascade connection type direct AC convertor all include n single-phase diode rectifier bridge, n The input side of Boost and n H bridge three parts, n single-phase diode rectifier bridge is connected using cascade system, each The outlet side of single-phase diode rectifier bridge connects a Boost, outlet side and the H bridge of each Boost DC side connection, the outlet side of n H bridge of each phase is using cascade system connection.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, a phase LC filter, b phase LC Filter and c phase LC filter all include an inductance and a capacitor.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, a are separated by release transformer, b Be separated by release transformer and c to be separated by release transformer all include Nx1、Nx2、Nx3Three windings and x are a, b or c, wherein Nx1For original Side winding, Nx2、Nx3For vice-side winding；Each umber of turn meets Na1=Nb1=Nc1、Na2=Nb2=Nc2、Na3=Nb3=Nc3；Around Group Na2Endpoint a2, winding Nb2Endpoint b2, winding Nc2Endpoint c2It is connected to point o；Winding Na2Endpoint a3With first group three The R of commutating phase bridge1aPoint is connected, winding Nb2Endpoint b3With the R of first group of three-phase rectification bridge1bPoint is connected, winding Nc2Endpoint c3 With the R of first group of three-phase rectification bridge1cPoint is connected；Na3Endpoint a4With winding Nb3Endpoint b5It is connected, Nb3Endpoint b4With winding Nc3Endpoint c5It is connected, Nc3Endpoint c4With winding Na3Endpoint a5It is connected；Winding Na5Endpoint a5With second group of three phase rectifier The R of bridge2aPoint is connected, winding Nb5Endpoint b5With the R of second group of three-phase rectification bridge2bPoint is connected, winding Nc5Endpoint c5With second The R of group three-phase rectification bridge2cPoint is connected.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, first group of three-phase rectification bridge Cathode endpoint R1-, second group of three-phase rectification bridge cathode endpoint R2-, load cathode be connected, endpoint N；First group of three-phase is whole Flow the positive endpoint R of bridge1+It is connected with the endpoint Q of paralleing reactor, the positive endpoint R of second group of three-phase rectification bridge2+With balance electricity The endpoint P of anti-device is connected；Paralleing reactor is connected around class mid point with the anode of load, endpoint M.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, a phase three winding isolated form become Depressor, b phase three winding isolated form transformer and c phase three winding isolated form transformer are high-frequency isolation transformer.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, a phase three winding isolated form become Depressor, b phase three winding isolated form transformer, c phase three winding isolated form transformer, first group of three-phase rectification bridge, second group of three-phase Rectifier bridge and paralleing reactor form 12 Pulses Rectifier of parallel connection type.
A kind of electrical energy changer applied to electric vehicle rapid charging of the present invention, the input of the electrical energy changer The middle pressure AC network of side connection 10/35kV.
A phase cascade connection type direct AC convertor, a phase LC filter, b phase cascade connection type direct AC convertor, b phase LC filter, c phase Three-phase main-frequency convert alternating current is three-phase high-frequency alternating current, a phase LC filtering by cascade connection type direct AC convertor, c phase LC filter The effect of device, b phase LC filter, c phase LC filter is to filter out higher hamonic wave.
A phase three winding isolated form transformer, b phase three winding isolated form transformer, c phase three winding isolated form transformer are High-frequency isolation transformer, this can reduce the occupied area of charging station；A phase three winding isolated form transformer, the isolation of b phase three winding Type transformer, c phase three winding isolated form transformer, first group of three-phase rectification bridge, second group of three-phase rectification bridge, paralleing reactor group At 12 Pulses Rectifier of parallel connection type, high current can be exported, improves the charging rate of battery.
The input side of electrical energy changer can directly connect 10/35kV power grid, not use power frequency distribution transformer, this can Reduce the cost and occupied area of charging station；On the other hand, three groups of LC filter output voltages are high-frequency alternating current, that is to say, that Three three winding isolated form transformers work in high frequency state, rather than power frequency state, this also can reduce the land occupation of charging station Area.
Embodiment two: as shown in Figure 1, a kind of electric energy change applied to electric vehicle rapid charging involved in the present embodiment The working principle of changing device, a phase cascade connection type direct AC convertor, b phase cascade connection type direct AC convertor, c phase cascade connection type friendship-alternating flow The input of device terminates 10/35kV AC network, input voltage frequency f1=50Hz；In each group of cascade connection type direct AC convertor In, the convert alternating current of 10/35kV is direct current by the n cascade single-phase diode rectifier bridge in exchange side, each single-phase two The pole pipe Boost that is connect of rectification bridge DC side is according to the adjustable DC voltage of requirement output amplitude of charging curve, and n It exchanges the cascade H bridge in side and realizes inversion function, the DC voltage inversion by Boost output is high-frequency alternating current, the height Frequency alternating current includes high frequency fundamental component and high-frequency harmonic ingredient；Three groups of LC filters filter the high-frequency harmonic in high-frequency alternating current It removes, the voltage for inputting three isolated form transformers so only includes high frequency fundamental component；Three three winding isolated form transformers, two Group three-phase rectification bridge, paralleing reactor realize 12 pulse wave rectifiers jointly, charge for battery.
Embodiment three: as shown in Figure 1, a kind of electric energy change applied to electric vehicle rapid charging involved in the present embodiment The control method of changing device, in each group of cascade connection type direct AC convertor, n Boost uses identical control mode, Boost is according to the adjustable DC voltage of requirement output amplitude of charging curve；According to the difference of used switching tube, n There are two types of control modes for a H bridge, and when using silicon substrate MOSFET or IGBT, n H bridge uses square wave phase shifting control, when using wide When forbidden band switching tube (such as silicon carbide-based IGBT or gallium nitride base MOSFET), n H bridge is controlled using PWM (including SPWM and SVPWM) System.
Example IV: as shown in Figure 1, a kind of electric energy change applied to electric vehicle rapid charging involved in the present embodiment The design method of changing device, a phase cascade connection type direct AC convertor, b phase cascade connection type direct AC convertor, c phase cascade connection type friendship-alternating flow The structure of device is identical, and a phase LC filter, b phase LC filter, the structure of c phase LC filter are identical, and a phase three winding isolated form becomes Depressor, b phase three winding isolated form transformer, the structure of c phase three winding isolated form transformer are identical；The cascade connection type friendship-of each phase Alternating flow device, LC filter, three winding isolated form transformer constitute a module, a phase direct AC convertor, b intersection-alternation Stream device, c phase direct AC convertor, a phase LC filter, b phase LC filter, c phase LC filter, a is separated by release transformer, b is separated by The function that release transformer, c are separated by release transformer is realized using three identical modules, is conducive to the mould of electrical energy changer Blockization is realized.
The foregoing is only a preferred embodiment of the present invention, these specific embodiments are all based on the present invention Different implementations under general idea, and scope of protection of the present invention is not limited thereto, it is any to be familiar with the art Technical staff in the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of, should all cover of the invention Within protection scope.Therefore, the scope of protection of the invention shall be subject to the scope of protection specified in the patent claim.

Claims (10)

1. a kind of electrical energy changer applied to electric vehicle rapid charging, which is characterized in that described to be applied to electric car The electrical energy changer of quick charge includes a phase cascade connection type direct AC convertor (1), b phase cascade connection type direct AC convertor (2), c phase Cascade connection type direct AC convertor (3), a phase LC filter (4), b phase LC filter (5), c phase LC filter (6), a phase three winding every Release transformer (7), b phase three winding isolated form transformer (8), c phase three winding isolated form transformer (9), first group of three-phase are whole Stream bridge (10), second group of three-phase rectification bridge (11) and paralleing reactor (12), a phase cascade connection type direct AC convertor (1), b phase cascade The input of type direct AC convertor (2) and c phase cascade connection type direct AC convertor (3) terminates AC network；A phase cascade connection type friendship-alternation The output end for flowing device (1), b phase cascade connection type direct AC convertor (2) and c phase cascade connection type direct AC convertor (3) is filtered with a phase LC respectively Wave device (4), b phase LC filter (5) are connected with c phase LC filter (6)；A phase LC filter (4), b phase LC filter (5) and c phase The output end of LC filter (6) respectively with a phase three winding isolated form transformer (7), b phase three winding isolated form transformer (8) and c The primary side winding of phase three winding isolated form transformer (9) is connected；A is separated by release transformer (7), b is separated by release transformer (8) and C is separated by release transformer (9) and exports two groups there are the high-frequency alternating current of 30o phase difference, and two groups of high-frequency alternating currents are separately input to First group of three-phase rectification bridge (10) and second group of three-phase rectification bridge (11), first group of three-phase rectification bridge (10) and second group of three-phase are whole The anode of stream bridge (11) is connect with paralleing reactor (12) respectively, first group of three-phase rectification bridge (10) and second group of three-phase rectification bridge (11) one end of cathode and load connects, and the other end of load is connect with the midpoint of paralleing reactor (12).
2. a kind of electrical energy changer applied to electric vehicle rapid charging according to claim 1, which is characterized in that The a phase cascade connection type direct AC convertor (1), b phase cascade connection type direct AC convertor (2) and c phase cascade connection type direct AC convertor (3) It all include n single-phase diode rectifier bridge, n Boost and n H bridge three parts, n single-phase diode rectifier bridge Input side is connected using cascade system, and the outlet side of each single-phase diode rectifier bridge connects a Boost, each The outlet side of a Boost is all connect with the DC side of H bridge, and the outlet side of n H bridge of each phase is connected using cascade system It connects.
3. a kind of electrical energy changer applied to electric vehicle rapid charging according to claim 2, which is characterized in that The a phase cascade connection type direct AC convertor (1), b phase cascade connection type direct AC convertor (2) and c phase cascade connection type direct AC convertor (3) In, n Boost uses identical control mode, and Boost is adjustable according to the requirement output amplitude of charging curve DC voltage；According to the difference of used switching tube, there are two types of control modes for n H bridge, as use silicon substrate MOSFET or IGBT When, n H bridge uses square wave phase shifting control, and when using broad stopband switching tube, n H bridge is controlled using PWM.
4. a kind of electrical energy changer applied to electric vehicle rapid charging according to claim 1, which is characterized in that The a phase LC filter (4), b phase LC filter (5) and c phase LC filter (6) all include an inductance and a capacitor.
5. a kind of electrical energy changer applied to electric vehicle rapid charging according to claim 1, which is characterized in that The a is separated by release transformer (7), b is separated by release transformer (8) and c is separated by release transformer (9) comprising Nx1、Nx2、Nx3 Three windings and x are a, b or c, wherein Nx1For primary side winding, Nx2、Nx3For vice-side winding；Each umber of turn meets Na1=Nb1= Nc1、Na2=Nb2=Nc2、Na3=Nb3=Nc3；Winding Na2Endpoint a2, winding Nb2Endpoint b2, winding Nc2Endpoint c2It is connected to Point o；Winding Na2Endpoint a3With the R of first group of three-phase rectification bridge (10)1aPoint is connected, winding Nb2Endpoint b3With first group of three-phase The R of rectifier bridge (10)1bPoint is connected, winding Nc2Endpoint c3With the R of first group of three-phase rectification bridge (10)1cPoint is connected；Na3Endpoint a4With winding Nb3Endpoint b5It is connected, Nb3Endpoint b4With winding Nc3Endpoint c5It is connected, Nc3Endpoint c4With winding Na3End Point a5It is connected；Winding Na5Endpoint a5With the R of second group of three-phase rectification bridge (11)2aPoint is connected, winding Nb5Endpoint b5With second The R of group three-phase rectification bridge (11)2bPoint is connected, winding Nc5Endpoint c5With the R of second group of three-phase rectification bridge (11)2cPoint is connected.
6. one according to claim 1 is applied to the electrical energy changer of electric vehicle rapid charging, which is characterized in that The cathode endpoint R of first group of three-phase rectification bridge (10)1-, second group of three-phase rectification bridge (11) cathode endpoint R2-, load Cathode is connected, endpoint N；The positive endpoint R of first group of three-phase rectification bridge (10)1+It is connected with the endpoint Q of paralleing reactor (12), The positive endpoint R of second group of three-phase rectification bridge (12)2+It is connected with the endpoint P of paralleing reactor (12)；Paralleing reactor (12) It is connected around class mid point with the anode of load, endpoint M.
7. a kind of electrical energy changer applied to electric vehicle rapid charging according to claim 1, which is characterized in that The a phase three winding isolated form transformer (7), b phase three winding isolated form transformer (8) and c phase three winding isolated form transformer It (9) is high-frequency isolation transformer.
8. a kind of electrical energy changer applied to electric vehicle rapid charging according to claim 1, which is characterized in that The a phase three winding isolated form transformer (7), b phase three winding isolated form transformer (8), c phase three winding isolated form transformer (9), first group of three-phase rectification bridge (10), second group of three-phase rectification bridge (11) and paralleing reactor (12) form 12 pulse wave of parallel connection type Rectifier.
9. a kind of electrical energy changer applied to electric vehicle rapid charging according to claim 1, which is characterized in that The a phase cascade connection type direct AC convertor (1), b phase cascade connection type direct AC convertor (2) and c phase cascade connection type direct AC convertor (3) Structure it is identical, a phase LC filter (4), b phase LC filter (5) are identical with the structure of c phase LC filter (6), a phase three winding Isolated form transformer (7), b phase three winding isolated form transformer (8) are identical with the structure of c phase three winding isolated form transformer (9)； Cascade connection type direct AC convertor, LC filter, the three winding isolated form transformer of each phase constitute a module, a intersection-friendship Current transformer (1), b phase direct AC convertor (2), c phase direct AC convertor (3), a phase LC filter (4), b phase LC filter (5), c Phase LC filter (6), a are separated by release transformer (7), b is separated by release transformer (8) and c is separated by the function of release transformer (9) It is realized using three identical modules.
10. a kind of electrical energy changer applied to electric vehicle rapid charging according to claim 1, feature exist In the middle pressure AC network of the input side connection 10/35kV of the electrical energy changer.
CN201910039635.5A 2019-01-16 2019-01-16 A kind of electrical energy changer applied to electric vehicle rapid charging Pending CN110212791A (en)

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Application publication date: 20190906