CN110518679A - A kind of controllable aerating electric load circuit and its control method - Google Patents

A kind of controllable aerating electric load circuit and its control method Download PDF

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Publication number
CN110518679A
CN110518679A CN201910816563.0A CN201910816563A CN110518679A CN 110518679 A CN110518679 A CN 110518679A CN 201910816563 A CN201910816563 A CN 201910816563A CN 110518679 A CN110518679 A CN 110518679A
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CN
China
Prior art keywords
phase
filter
mode
diode
shifted full
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Pending
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CN201910816563.0A
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Chinese (zh)
Inventor
肖勇
李秋硕
王宗义
朱贤文
吴昊文
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CSG Electric Power Research Institute
China Southern Power Grid Co Ltd
Research Institute of Southern Power Grid Co Ltd
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China Southern Power Grid Co Ltd
Research Institute of Southern Power Grid Co Ltd
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Priority to CN201910816563.0A priority Critical patent/CN110518679A/en
Publication of CN110518679A publication Critical patent/CN110518679A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • 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
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
    • 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

Abstract

This application discloses a kind of controllable aerating electric load circuit and its control methods, including the phase-shifted full-bridge converter, three-phase bridge arm and three-phase LC filter being sequentially connected, the input terminal of phase-shifted full-bridge converter connects power supply to be measured, wherein: in the first operation mode, three-phase bridge arm and three-phase LC filter are combined as three-phase crisscross parallel buck exchanger, and the output end of three-phase LC filter connects vehicle mounted dynamic battery packet；In the second operation mode, three-phase bridge arm and three-phase LC filter are combined as three-phase inverter, and the output end of three-phase LC filter connects power grid.Controllable aerating electric load circuit is mainly made of power electronic devices in the application, power density is high, small in size, light-weight, efficiency is higher, 85% or more electric energy can be saved, by selecting corresponding operating mode and control strategy controllable aerating electric load circuit to generate corresponding test environment, the adjustment for testing environment is flexible, can satisfy all kinds of different demands.

Description

A kind of controllable aerating electric load circuit and its control method
Technical field
The present invention relates to field of new energy technologies, in particular to a kind of controllable aerating electric load circuit and its control method.
Background technique
With the large-scale development of China's electric car, charging infrastructure O&M support mission gradually shows, from non-vehicle It carries charger site installation test, check and accept, routine test, maintenance, further arrive accident rush repair Deng Ge section ring into operation Section, has increasing need for special technical support and equipment guarantee, therefore charger mobile test equipment gradually obtains insider Approval.
The test site of non-on-board charger uses resistance box or DC Electronic Loads more at present, and this method causes greatly The energy waste of amount, and need to be equipped with big radiator, cause test equipment own wt volume larger, in some test environment And it is not suitable for.
If selecting electric car as mobile platform, and on-the-spot test is to directly adopt its vehicle-mounted power battery pack conduct Charging load, the rechargeable electrical energy in test process are directly stored in on-vehicle battery, will not be wasted, and test environment specific resistance case Or DC Electronic Loads are more true.But there are many limitations for electric car, first is that on-vehicle battery packet is full of rear nothing in electricity Method is tested again；Second is that operating mode and charge parameter, the working environment of battery management system are more single, it is difficult to meet not Same specification, model non-on-board charger on-the-spot test needs；Third is that extreme parameters are generally not in, it is difficult to test fee vehicle Carry the emergency reaction of charger and the ability of protection.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that current those skilled in the art need to solve Problem.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of controllable aerating electric load circuit and its control methods, so as to energy Enough flexibly adjustment test parameters, meet different testing requirements, while avoiding energy dissipation.
Its concrete scheme is as follows:
A kind of controllable aerating electric load circuit, including phase-shifted full-bridge converter, three-phase bridge arm and three-phase the LC filter being sequentially connected The input terminal of wave device, the phase-shifted full-bridge converter connects power supply to be measured, in which:
In the first operation mode, the three-phase bridge arm and the three-phase LC filter are combined as three-phase crisscross parallel The output end of buck exchanger, the three-phase LC filter connects vehicle mounted dynamic battery packet；
In the second operation mode, the three-phase bridge arm and the three-phase LC filter are combined as three-phase inverter, The output end of the three-phase LC filter connects power grid.
Preferably, the charge mode of the phase-shifted full-bridge converter specifically by double-closed-loop control charge mode.
Preferably, the charge mode of the phase-shifted full-bridge converter specifically:
Constant voltage mode, constant current mode, constant power mode or permanent resistance mode.
Preferably, the phase-shifted full-bridge converter includes first capacitor, the second capacitor, capacitance, cascade capacitor, input Side inductance, resonant inductance, filter inductance, first switch tube, second switch, third switching tube, the 4th switching tube, the one or two pole Pipe, the second diode, third diode, the 4th diode and transformer；
The resonant inductance, the capacitance are connected with the primary side winding of the transformer as isolated location；It is described Positive input terminal of the first end of first capacitor as the phase-shifted full-bridge converter, it is positive, described defeated with the power supply to be measured Enter the first end connection of side inductance；The first end of the second end of the input side inductance and second capacitor, described first open Close first end, the connection of the first end of the third switching tube of pipe；The second end of the first switch tube and the second switch The first end of pipe, the connection of the first end of the isolated location；The second end of the third switching tube and the 4th switching tube First end, the connection of the second end of the isolated location；The second end of the first capacitor is as the phase-shifted full-bridge converter Negative input end, with the cathode of the power supply to be measured, the second end of second capacitor, the second end of the second switch, institute State the second end connection of the 4th switching tube；
The cathode of the first diode is connect with the first end of the cathode of second diode, the filter inductance； The second end of the filter inductance and the first end of the cascade capacitor are connected to the positive output of the phase-shifted full-bridge converter End；The anode of the first diode and the first end of the cathode of the third diode, the secondary side winding of the transformer connect It connects；The anode of second diode is connect with the second end of the cathode of the 4th diode, the secondary side winding；Described The anode of three diodes is connect with the second end of positive, the described cascade capacitor of the 4th diode, complete as the phase shift The negative output terminal of bridging parallel operation.
Preferably, the three-phase crisscross parallel buck exchanger is specially outer voltage control DC bus-bar voltage, electric current The three-phase crisscross parallel buck exchanger of inner loop control switch tube current.
Preferably, the three-phase inverter is specially outer voltage control DC bus-bar voltage, the survey of current inner loop control net The three-phase inverter of electric current.
Correspondingly, being applied to above any the invention also discloses a kind of control method of controllable aerating electric load circuit The item controllable aerating electric load circuit, comprising:
In the first operation mode, the three-phase bridge arm and the three-phase LC filter are combined as parallel three phase buck The output end of exchanger, the three-phase LC filter connects vehicle mounted dynamic battery packet；
In the second operation mode, the three-phase bridge arm and the three-phase LC filter are combined as three-phase inverter, The output end of the three-phase LC filter connects power grid.
Preferably, the control method further include:
Pass through phase-shifted full-bridge converter described in double-closed-loop control.
Preferably, the process by phase-shifted full-bridge converter described in double-closed-loop control, specifically includes:
Determine the phase-shifted full-bridge converter charge mode be specially constant voltage mode, constant current mode, constant power mode or Permanent resistance mode is worked with controlling the phase-shifted full-bridge converter according to the charge mode.
Preferably, the control method further include:
In such a way that outer voltage controls DC bus-bar voltage, current inner loop control switchs tube current, control described three Staggered parallel connection buck exchanger；
In such a way that outer voltage controls DC bus-bar voltage, current inner loop control net surveys electric current, the three-phase is controlled Inverter.
The invention discloses a kind of controllable aerating electric load circuit, including be sequentially connected phase-shifted full-bridge converter, three-phase bridge The input terminal of arm and three-phase LC filter, the phase-shifted full-bridge converter connects power supply to be measured, in which: in the first operating mode Under, the three-phase bridge arm and the three-phase LC filter are combined as three-phase crisscross parallel buck exchanger, the three-phase LC filter The output end of wave device connects vehicle mounted dynamic battery packet；In the second operation mode, the three-phase bridge arm and the three-phase LC are filtered Wave device is combined as three-phase inverter, and the output end of the three-phase LC filter connects power grid.Controllable charging load in the present invention Circuit is mainly made of power electronic devices, and power density is high, small in size, light-weight, and efficiency is higher, can save 85% or more Electric energy, by selecting corresponding operating mode and control strategy, phase-shifted full-bridge converter and three-phase bridge arm that can pass through signal Control generates corresponding test environment, and the adjustment for testing environment is flexible, can satisfy all kinds of different demands.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural topology figure of controllable aerating electric load circuit in the embodiment of the present invention；
Fig. 2 is the control block diagram of three-phase crisscross parallel buck converter in the embodiment of the present invention；
Fig. 3 a is the current inner loop control block diagram of three-phase inverter in the embodiment of the present invention；
Fig. 3 b is the outer voltage control block diagram of three-phase inverter in the embodiment of the present invention；
Fig. 4 is the control block diagram of phase-shifted full-bridge converter in the embodiment of the present invention；
Fig. 5 a is the specific control block diagram of the first operating mode in the embodiment of the present invention；
Fig. 5 b is the specific control block diagram of the second operating mode in the embodiment of the present invention；
Fig. 6 is the specific control block diagram of the constant voltage mode of phase-shifted full-bridge converter in the embodiment of the present invention；
Fig. 7 is the specific control block diagram of the constant power mode of phase-shifted full-bridge converter in the embodiment of the present invention；
Fig. 8 is the specific control block diagram of the permanent resistance mode of phase-shifted full-bridge converter in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
It is shown in Figure 1 the embodiment of the invention discloses a kind of controllable aerating electric load circuit, including the phase shift being sequentially connected The input terminal of full-bridge converter, three-phase bridge arm and three-phase LC filter, the phase-shifted full-bridge converter connects power supply to be measured, In:
In the first operation mode, the three-phase bridge arm and the three-phase LC filter are combined as three-phase crisscross parallel The output end of buck exchanger, the three-phase LC filter connects vehicle mounted dynamic battery packet；
In the second operation mode, the three-phase bridge arm and the three-phase LC filter are combined as three-phase inverter, The output end of the three-phase LC filter connects power grid.
It is understood that three-phase bridge arm is either three-phase half-bridge, is also possible to three phase full bridge.
In the first operating mode, three-phase crisscross parallel buck exchanger, abbreviation buck exchanger is by DC bus-bar voltage The voltage of vehicle mounted dynamic battery packet is dropped to, and controls the output electric current of DC bus-bar voltage and buck converter, while reducing defeated The ripple of electric current prevents the power battery pack service life impaired out, and the output of three-phase LC filter fills a power storage in onboard power In battery pack.Specifically when controlling buck exchanger use Double closed-loop of voltage and current, that is to say, that described three it is staggered simultaneously Connection buck exchanger be specially outer voltage control DC bus-bar voltage, current inner loop control switch tube current three it is staggered simultaneously Join buck exchanger, buck converter control block diagram referring to fig. 2, wherein GvAnd GiRespectively voltage regulator and current regulation The transmission function of device, GidAnd GviRespectively transmission function of the duty ratio to switch tube current and switch tube current to input voltage.
In the second operating mode, the output end of three-phase inverter connects power grid, and three-phase inverter is by rechargeable electrical energy feedback To power grid, three-phase LC filter then guarantees that the high-frequency harmonic in grid-connected current meets grid-connected requirement, when controlling three-phase inverter Equally use Double closed-loop of voltage and current, that is to say, that the three-phase inverter is specially outer voltage control DC bus Voltage, current inner loop control net survey the three-phase inverter of electric current.
Further, referring to outer voltage control block diagram shown in current inner loop control block diagram shown in Fig. 3 a and Fig. 3 b: Fig. 3 a In,For the equivalent transfer function of current sample link, TsFor the current inner loop sampling period,For current inner loop The equivalent transfer function of controller,For the equivalent transfer function of inverter, KPWMIt is inverse for the equivalent gain of bridge PWM Become the inertia time constant of device as the half of current sample time；For the transmission function for filtering link；In Fig. 3 b,For the equivalent transfer function of voltage sample link, τvFor the outer voltage sampling period；For outer voltage The equivalent transfer function of controller pole zero point form；For the equivalent closed loop transfer function, of current inner loop, TsFor electricity Flow the inner ring sampling period；0.75m cos θ be current on line side peak value to DC side electric current transmission function, m be modulation ratio (m≤ 1), θ is switch function fundamental wave starting phase angle；For the transmission function of filter capacitor electric current to DC voltage.
Similar with above buck converter, three-phase inverter, the charge mode of the phase-shifted full-bridge converter is specially By the charge mode of double-closed-loop control, the charge mode of the phase-shifted full-bridge converter specifically: constant voltage mode, constant current mould Formula, constant power mode or permanent resistance mode.
It is understood that the charge mode of phase-shifted full-bridge converter is optional in the present embodiment, use in different modes Similar a set of control logic, control block diagram shown in Figure 4, the outer ring of above-mentioned four kinds of charge modes control input electricity respectively Press U, input current I, input power P or input resistance R, point stream inner loop control filter inductance electric current, in figure X respectively correspond U, I, P or R, GvAnd GiThe respectively transmission function of outer ring adjuster and current regulator, GipAnd GxiRespectively phase shifting angle is electric to inductance The transmission function of stream and inductive current to outer loop control object.
It is understood that the controllable aerating electric load circuit in the present embodiment belongs to power electronic equipment, efficiency generally exists 85% or more, 85% or more electric energy can be saved, and Sofe Switch skill is used by phase-shifted full-bridge converter in this present embodiment Art, efficiency can be promoted further, can achieve 95% or so substantially.
Specifically, as shown in Figure 1, power supply to be measured includes voltage source UchargeWith interior resistance r, the phase-shifted full-bridge converter Including first capacitor C1, the second capacitor C2, capacitance Cb, cascade capacitor C3, input side inductance L1, resonant inductance Lr, filtering Inductance L2, first switch tube S1, second switch S2, third switching tube S3, the 4th switching tube S4, first diode D1, second Diode D2, third diode D3, the 4th diode D4 and transformer T；
The resonant inductance Lr, the capacitance Cb are connected with the primary side winding of the transformer T as isolated location； Positive input terminal of the first end of the first capacitor C1 as the phase-shifted full-bridge converter, with the anode of the power supply to be measured, The first end of the input side inductance L1 connects；The first of the second end of the input side inductance L1 and the second capacitor C2 End, the connection of the first end of the first switch tube S1, the first end of the third switching tube S3；The of the first switch tube S1 Two ends are connect with the first end of the second switch S2, the first end of the isolated location；The of the third switching tube S3 Two ends are connect with the first end of the 4th switching tube S4, the second end of the isolated location；The second of the first capacitor C1 Hold negative input end as the phase-shifted full-bridge converter, with the cathode of the power supply to be measured, the second capacitor C2 second End, the connection of the second end of the second switch S2, the second end of the 4th switching tube S4；
The first end of the cathode of the cathode of the first diode D1 and the second diode D2, the filter inductance L2 Connection；The second end of the filter inductance L2 and the first end of the cascade capacitor C3 are connected to the phase-shifted full-bridge converter Positive output end；The anode of the first diode D1 and the cathode of the third diode D3, the transformer T secondary side around The first end connection of group；The anode of the second diode D2 and the cathode of the 4th diode D4, the secondary side winding Second end connection；The anode of the third diode D3 and the of positive, the described cascade capacitor C3 of the 4th diode D4 The connection of two ends, the negative output terminal as the phase-shifted full-bridge converter.
It is understood that three-phase bridge arm and three-phase LC filter are also shown in FIG. 1, three-phase bridge arm includes the 5th switch Pipe S5, the 6th switching tube S6, the 7th switching tube S7, the 8th switching tube S8, the 9th switching tube S9 and the tenth switching tube S10, accordingly Connection forms three bridge arms；Three-phase LC filter includes the three rear class filtering inductance connected as shown in figure 1: L3, L4, L5 and three A rear class filtering capacitor: C4, C5 and C6.
It is understood that the model of the first switch tube S1 to the tenth switching tube S10 that are mentioned above are unlimited, according to reality Border situation determines, IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar crystal usually may be selected Pipe) pipe, and then above the first end of each switching tube is the drain electrode of IGBT pipe, second end is the source electrode of IGBT pipe.
By taking the constant current mode of phase-shifted full-bridge converter as an example, the control of the controllable aerating electric load circuit in Fig. 1 is made into one Step is described in detail:
Referring under the first operating mode shown in Fig. 5 a, change is obtained from phase-shifted full-bridge converter (abbreviation converter) input side Parallel operation input current signal Iin, with given input side voltage value Iin_refIt makes the difference to form error signal by the first subtracter 1-1 It is sent into current regulator 1-2, obtains the reference value I of filter inductance electric currentL_ref, filter inductance electric current is obtained from converter outlet side Signal IL, reference value I with filter inductance electric currentL_refIt makes the difference to form error signal feeding electric current tune by the second subtracter 1-3 Device 1-4 is saved, modulated signal is obtainedAfter compared with high frequency triangle wave is by first comparator 1-5, pass through PWM (Pulse Width Modulation, pulse width modulation) generator obtains the switching drive signal of driving HF switch, this Signal is fed directly to the grid of switching tube, opens and turns off for controlling it；Buck converter is obtained from the cascade two sides capacitor C3 Input voltage signal Ubus, with given input side voltage value Ubus_refBy third subtracter 1-7, make the difference to form error signal Vw2, it is sent into voltage regulator 1-8, obtains the output signal I of voltage regulatorsw_ref；Third subtracter 1-7 and voltage regulator 1-8 constitutes outer voltage；From switching tube S5Place obtain current signal Isw, output signal with voltage regulator 1-10 Isw_refBy the 4th subtracter 1-7, makes the difference to form error signal feeding current regulator 1-10, obtain the defeated of current regulator After signal is compared with high frequency triangle wave is by the second comparator 1-11 out, driving HF switch is obtained by PWM generator Switching drive signal, this signal are fed directly to the grid of corresponding switching tube, open and turn off for controlling it.
Referring under the second operating mode shown in Fig. 5 b, converter input current signal I is obtained from converter input sidein, With given input side voltage value Iin_refIt makes the difference to form error signal feeding current regulator 1-2 by the first subtracter 1-1, Obtain the reference value I of filter inductance electric currentL_ref, filter inductance current signal I is obtained from converter outlet sideL, with filter inductance The reference value I of electric currentL_refIt makes the difference to form error signal feeding current regulator 1-4 by the second subtracter 1-3, obtains modulation letter NumberAfter compared with high frequency triangle wave is by first comparator 1-5, driving HF switch is obtained by PWM generator Switching drive signal, this signal is fed directly to the grid of IGBT switching tube, opens and turn off for controlling it；It is side-draw from power grid Obtain ua,ub,uc、ia,ib,ic1-17, which is converted, by abc- α β obtains uα,uβ、iα,iβ, by uα,uβIt is sent into phaselocked loop 1-13 and obtains electricity Net phase signal is re-fed into dq- α β transformation 1-14, by iα,iβIt is sent into α β-dq transformation 1-14 and obtains id,iq；From cascade capacitor C3 two It is side-draw to obtain input voltage signal Ubus, with given input side voltage value Ubus_refBy third subtracter 1-7, make the difference to form mistake Difference signal is sent into voltage regulator 1-8, obtains the output signal of voltage regulatorWith idPass through the 4th subtracter 1-9 Error signal is obtained, error signal is obtained by current regulator 1-11Iq_refWith iqIt is obtained by the 5th subtracter 1-10 To error signal, error signal is obtained by current regulator 1-12It will1-15 is converted by dq- α β to obtainThe switching drive signal of driving HF switch is obtained by PWM generator 1-16, this signal is fed directly to IGBT switch The grid of pipe is opened and is turned off for controlling it.
Phase-shifting full-bridge transformation similar with above constant current mode, under constant voltage mode, constant power mode and permanent resistance mode The specific control logic of device is equally double-closed-loop control:
Specific control block diagram shown in Figure 6 for constant voltage mode obtains converter input current from converter input side Signal Uin, with given input side voltage value Uin_refIt makes the difference to form error signal feeding current regulation by the first subtracter 1-1 Device 1-2 obtains the reference value I of filter inductance electric currentL_ref, filter inductance current signal I is obtained from converter outlet sideL, with filter The reference value I of wave inductive currentL_refIt makes the difference to form error signal feeding current regulator 1-4 by the second subtracter 1-3, obtain Modulated signalAfter compared with high frequency triangle wave is by first comparator 1-5, driven by PWM generator The switching drive signal of HF switch, this signal are fed directly to the grid of IGBT switching tube, open and turn off for controlling it.
Specific control block diagram shown in Figure 7 for constant power mode obtains converter input electricity from converter input side Current voltage signal UinAnd Iin, it is sent into multiplier and obtains input power signal Pin, with given input side voltage value Pin_refPass through First subtracter 1-1 makes the difference to form error signal feeding current regulator 1-2, obtains the reference value I of filter inductance electric currentL_ref, Filter inductance current signal I is obtained from converter outlet sideL, reference value I with filter inductance electric currentL_refPass through the second subtracter 1-3 makes the difference to form error signal feeding current regulator 1-4, obtains modulated signalPass through first with high frequency triangle wave After the comparison of comparator 1-5, the switching drive signal of driving HF switch is obtained by PWM generator, this signal is fed directly to The grid of IGBT switching tube is opened and is turned off for controlling it.
Specific control block diagram shown in Figure 8 for permanent resistance mode obtains converter input electricity from converter input side Current voltage signal UinAnd Iin, it is sent into divider and obtains input resistance signal Rin, with given input side voltage value Rin_refPass through First subtracter 1-1 makes the difference to form error signal feeding current regulator 1-2, obtains the reference value I of filter inductance electric currentL_ref, Filter inductance current signal I is obtained from converter outlet sideL, reference value I with filter inductance electric currentL_refPass through the second subtracter 1-3 makes the difference to form error signal feeding current regulator 1-4, obtains modulated signalPass through first with high frequency triangle wave After the comparison of comparator 1-5, the switching drive signal of driving HF switch is obtained by PWM generator, this signal is fed directly to The grid of IGBT switching tube is opened and is turned off for controlling it.
The embodiment of the invention discloses a kind of controllable aerating electric load circuit, including be sequentially connected phase-shifted full-bridge converter, The input terminal of three-phase bridge arm and three-phase LC filter, the phase-shifted full-bridge converter connects power supply to be measured, in which: in the first work Under mode, the three-phase bridge arm and the three-phase LC filter are combined as three-phase crisscross parallel buck exchanger, the three-phase The output end of LC filter connects vehicle mounted dynamic battery packet；In the second operation mode, by the three-phase bridge arm and the three-phase LC filter is combined as three-phase inverter, and the output end of the three-phase LC filter connects power grid.It can in the embodiment of the present invention Control charging load circuit is mainly made of power electronic devices, and power density is high, small in size, light-weight, and efficiency is higher, Neng Goushi The transport that loading should be moved requires and the non-on-board charger on-the-spot test of place limit for height；Because it is by power electronic devices structure At, thus can save 85% or more electric energy, pass through the corresponding operating mode of selection and control strategy, phase-shifted full-bridge converter It can be controlled by signal with three-phase bridge arm and generate corresponding test environment, the adjustment for testing environment is flexible, has in specified model The ability continuously adjusted in enclosing can satisfy all kinds of different demands, realize the autonomous test to non-on-board charger.
Correspondingly, being applied to above any the invention also discloses a kind of control method of controllable aerating electric load circuit The item controllable aerating electric load circuit, comprising:
In the first operation mode, the three-phase bridge arm and the three-phase LC filter are combined as parallel three phase buck The output end of exchanger, the three-phase LC filter connects vehicle mounted dynamic battery packet；
In the second operation mode, the three-phase bridge arm and the three-phase LC filter are combined as three-phase inverter, The output end of the three-phase LC filter connects power grid.
In some specific embodiments, the control method further include:
Pass through phase-shifted full-bridge converter described in double-closed-loop control.
In some specific embodiments, the process by phase-shifted full-bridge converter described in double-closed-loop control, specifically Include:
Determine the phase-shifted full-bridge converter charge mode be specially constant voltage mode, constant current mode, constant power mode or Permanent resistance mode is worked with controlling the phase-shifted full-bridge converter according to the charge mode.
In some specific embodiments, the control method further include:
In such a way that outer voltage controls DC bus-bar voltage, current inner loop control switchs tube current, control described three Staggered parallel connection buck exchanger；
In such a way that outer voltage controls DC bus-bar voltage, current inner loop control net surveys electric current, the three-phase is controlled Inverter.
Controllable aerating electric load circuit is mainly made of power electronic devices in the embodiment of the present invention, power density height, volume Small, light-weight, efficiency is higher, and the transport that can adapt to mobile loading requires and the non-on-board charger scene of place limit for height is surveyed Examination；Because it is made of power electronic devices, 85% or more electric energy can be saved, by selecting corresponding operating mode And control strategy, phase-shifted full-bridge converter and three-phase bridge arm can be controlled by signal and generate corresponding test environment, test wrapper The adjustment in border is flexible, has the ability continuously adjusted in rated range, can satisfy all kinds of different demands, realizes to non-vehicle Carry the autonomous test of charger.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged Except there is also other identical elements in the process, method, article or apparatus that includes the element.
A kind of controllable aerating electric load circuit provided by the present invention and its control method are described in detail above, this Apply that a specific example illustrates the principle and implementation of the invention in text, the explanation of above example is only intended to It facilitates the understanding of the method and its core concept of the invention；At the same time, for those skilled in the art, think of according to the present invention Think, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not be construed as pair Limitation of the invention.

Claims (10)

1. a kind of controllable aerating electric load circuit, which is characterized in that including be sequentially connected phase-shifted full-bridge converter, three-phase bridge arm and The input terminal of three-phase LC filter, the phase-shifted full-bridge converter connects power supply to be measured, in which:
In the first operation mode, the three-phase bridge arm and the three-phase LC filter are combined as three-phase crisscross parallel buck friendship The output end of parallel operation, the three-phase LC filter connects vehicle mounted dynamic battery packet；
In the second operation mode, the three-phase bridge arm and the three-phase LC filter are combined as three-phase inverter, it is described The output end of three-phase LC filter connects power grid.
2. controllable aerating electric load circuit according to claim 1, which is characterized in that the charging mould of the phase-shifted full-bridge converter Formula specifically by double-closed-loop control charge mode.
3. controllable aerating electric load circuit according to claim 2, which is characterized in that the charging mould of the phase-shifted full-bridge converter Formula specifically:
Constant voltage mode, constant current mode, constant power mode or permanent resistance mode.
4. controllable aerating electric load circuit according to claim 3, which is characterized in that the phase-shifted full-bridge converter includes first Capacitor, the second capacitor, capacitance, cascade capacitor, input side inductance, resonant inductance, filter inductance, first switch tube, second Switching tube, third switching tube, the 4th switching tube, first diode, the second diode, third diode, the 4th diode and change Depressor；
The resonant inductance, the capacitance are connected with the primary side winding of the transformer as isolated location；Described first Positive input terminal of the first end of capacitor as the phase-shifted full-bridge converter, positive, the described input side with the power supply to be measured The first end of inductance connects；First end, the first switch tube of the second end of the input side inductance and second capacitor First end, the first end of the third switching tube connection；The second end of the first switch tube and the second switch First end, the connection of the first end of the isolated location；The first of the second end of the third switching tube and the 4th switching tube The second end connection at end, the isolated location；The second end of the first capacitor is defeated as bearing for the phase-shifted full-bridge converter Enter end, with the cathode of the power supply to be measured, the second end of second capacitor, the second end of the second switch, described the The second end of four switching tubes connects；
The cathode of the first diode is connect with the first end of the cathode of second diode, the filter inductance；It is described The second end of filter inductance and the first end of the cascade capacitor are connected to the positive output end of the phase-shifted full-bridge converter；Institute The anode for stating first diode is connect with the first end of the cathode of the third diode, the secondary side winding of the transformer；Institute The anode for stating the second diode is connect with the second end of the cathode of the 4th diode, the secondary side winding；Described 3rd 2 The anode of pole pipe is connect with the second end of positive, the described cascade capacitor of the 4th diode, is become as the phase-shifting full-bridge The negative output terminal of parallel operation.
5. according to claim 1 to any one of 4 controllable aerating electric load circuits, which is characterized in that the three-phase crisscross parallel Buck exchanger is specially the three-phase crisscross parallel of outer voltage control DC bus-bar voltage, current inner loop control switch tube current Buck exchanger.
6. controllable aerating electric load circuit according to claim 5, which is characterized in that the three-phase inverter is specially outside voltage Ring controls DC bus-bar voltage, current inner loop control net surveys the three-phase inverter of electric current.
7. a kind of control method of controllable aerating electric load circuit is applied to any one of claim 1 to 6 controllable charging load Circuit characterized by comprising
In the first operation mode, the three-phase bridge arm and the three-phase LC filter are combined as parallel three phase buck exchange The output end of device, the three-phase LC filter connects vehicle mounted dynamic battery packet；
In the second operation mode, the three-phase bridge arm and the three-phase LC filter are combined as three-phase inverter, it is described The output end of three-phase LC filter connects power grid.
8. control method according to claim 7, which is characterized in that further include:
Pass through phase-shifted full-bridge converter described in double-closed-loop control.
9. control method according to claim 8, which is characterized in that described to be converted by phase-shifting full-bridge described in double-closed-loop control The process of device, specifically includes:
The charge mode for determining the phase-shifted full-bridge converter is specially constant voltage mode, constant current mode, constant power mode or permanent electricity Resistance mode is worked with controlling the phase-shifted full-bridge converter according to the charge mode.
10. according to any one of claim 7 to 9 control method, which is characterized in that further include:
In such a way that outer voltage controls DC bus-bar voltage, current inner loop control switchs tube current, three intersection is controlled Wrong parallel connection buck exchanger；
In such a way that outer voltage controls DC bus-bar voltage, current inner loop control net surveys electric current, the three-phase inversion is controlled Device.
CN201910816563.0A 2019-08-30 2019-08-30 A kind of controllable aerating electric load circuit and its control method Pending CN110518679A (en)

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