CN106100359A - Hand over orthogonal type EMUs AuCT and work process thereof - Google Patents

Hand over orthogonal type EMUs AuCT and work process thereof Download PDF

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Publication number
CN106100359A
CN106100359A CN201610493360.9A CN201610493360A CN106100359A CN 106100359 A CN106100359 A CN 106100359A CN 201610493360 A CN201610493360 A CN 201610493360A CN 106100359 A CN106100359 A CN 106100359A
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China
Prior art keywords
axle
current
voltage
circuit
output
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Pending
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CN201610493360.9A
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Chinese (zh)
Inventor
崔晓光
申磊
徐哲
杨东军
张利军
胡冰
林显琦
邵春伟
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CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd
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CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd
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Priority to CN201610493360.9A priority Critical patent/CN106100359A/en
Publication of CN106100359A publication Critical patent/CN106100359A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/34—Snubber circuits
    • 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
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • 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
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The present invention relates to a kind of friendship orthogonal type EMUs AuCT and work process thereof, this AuCT includes controller and the pre-charge circuit being connected with controller, booster transformer, input filter circuit, rectification circuit, puts dot circuit, inversion module output filter circuit and output contactor, when AuCT starts, pre-charge circuit charges, when charging voltage reaches certain level, pre-charge circuit disconnects, and AuCT non-resistance works；When AuCT normally works, AuCT input three-phase alternating current boosted transformator TR1 boosting；During input voltage zero crossing, starting PWM rectifier, after the unipolarity four-quadrant double-closed-loop control algorithm of PWM rectifier, output voltage reaches stable DC voltage；Obtain exporting specified three-phase alternating voltage after the voltage space vector control mode of inverter；Power through output filter circuit and output contactor back loading.This AuCT and work process thereof can improve AuCT power supply reliability.

Description

AC-DC-AC type EMUs AuCT and work process thereof
Technical field
The present invention relates to converter topology field, specifically, relate to a kind of AC-DC-AC type EMUs AuCT And work process.
Background technology
Domestic EMUs AuCT has multiple series vehicle, and the auxiliary current transformer module of major part vehicle becomes with traction Stream device module shares a DC link, and its AuCT relevant device is installed in traction convertor, without single casing, Cause converter structure complicated, be unfavorable for that the later stage overhauls；Some EMUs AuCTs are divided into single AuCT auxiliary with double Helping two kinds of current transformer, the most double AuCTs need to consider the parallel running of two current transformers, and control method is relative complex；This A little vehicles are all the unsteady flow patterns using direct current to deliver stream, are all by the intermediate dc loop power supply of traction convertor, power supply system Formula is more single, and DC loop once breaks down will affect the properly functioning of AuCT.
Summary of the invention
It is an object of the invention to provide a kind of AC-DC-AC type EMUs AuCT and work process thereof, improve auxiliary Current transformer power supply reliability.
The technical scheme is that a kind of AC-DC-AC type EMUs AuCT, this AuCT includes control Device processed and the pre-charge circuit being connected with controller, booster transformer, input filter circuit, rectification circuit, discharge circuit, inverse Becoming module, output filter circuit and output contactor, pre-charge circuit input electrically connects with single phase ac, and pre-charge circuit is defeated It is connected with input filter circuit after going out to hold boosted transformator TR1；Rectification circuit input end is connected with input filter circuit, input Filter circuit and the PWM rectifier of rectification circuit composition, rectification circuit output end is connected with inversion module through discharge circuit；Inversion Module outfan is connected with load through output filter circuit and output contactor.
Preferably, described pre-charge circuit includes pre-charge resistance RC, pre-charge contactor IVK2 and main contactor IVK1；Pre-charge resistance RC connects with pre-charge contactor IVK2, main contactor IVK1 with connect after pre-charge resistance RC with Pre-charge contactor IVK2 is in parallel.
Preferably, this AuCT arranges voltage sensor and current sensor, voltage sensor and lines in parallel, Current sensor is connected with circuit；Voltage sensor include input voltage sensor, middle rectifier output voltage sensor and AC output voltage sensor, current sensor include commutator input current sensor, inversion module output current sensor and AC exports current sensor；Input voltage sensor is in parallel with booster transformer TR1 input, commutator input current sensor Connect with booster transformer TR1 outfan；Middle rectifier output voltage sensor is in parallel with rectifier output end, inversion module Output current sensor is connected with inversion module outfan；AC output voltage sensor is in parallel with output filter circuit outfan, AC output current sensor is connected with output filter circuit outfan.
Preferably, this AuCT is additionally provided with short-circuit current limiting circuit, and it is defeated that short-circuit current limiting circuit is arranged at inversion module Going out end, short-circuit current limiting circuit is provided with hardware sample circuit, hardware current protection circuit and comparison circuit, and hardware sample circuit inputs End is connected with current sensor, and hardware sample circuit outfan and hardware current protection circuit are connected with comparison circuit input, Comparison circuit outfan connects controller.
Invention additionally discloses the work process of a kind of AuCT, when work process is particularly as follows: AuCT starts, Pre-charge circuit charges, and when charging voltage reaches certain level, pre-charge circuit disconnects, and AuCT non-resistance works； When AuCT normally works, AuCT input single-phase alternating current boosted transformator TR1 boosts；Input voltage zero passage During point, enable PWM rectifier, begin to send out PWM ripple, defeated after the unipolarity four-quadrant double-closed-loop control algorithm of PWM rectifier Go out voltage and reach stable DC voltage；Obtain exporting specified after the voltage space vector control mode of inversion module Three-phase alternating voltage；Power through output filter circuit and output contactor back loading.
Preferably, described unipolarity four-quadrant double-closed-loop control algorithm includes the d of the commutation output value to PWM rectifier Axle regulation and q axle regulate；
D axle is adjusted to: the regulation of d axle includes that the regulation of d axle commutating voltage outer shroud and d axle rectified current internal ring regulate, d shaft voltage The d axle commutating voltage reference value of outer shroudMedium voltage U is exported for rectification targetdcref, the d axle commutating voltage of d shaft voltage outer shroud Value of feedback uzdActual medium voltage U for rectification output enddact, by d axle commutating voltage reference valueAnti-with d axle commutating voltage Feedback value uzdBetween deviation through outer voltage PI parameter regulate, obtain the rectified current reference value of d shaft current internal ringD axle D axle rectified current value of feedback i of current inner loopzdFor the d axle component of the rectified current after coordinate transform, by d axle rectified current Stream reference valueWith d axle rectified current value of feedback izdBetween deviation carry out the regulation of current inner loop PI parameter, obtain that d axle is double to be closed The commutation output value of ring regulation；
Q axle is adjusted to: the regulation of q axle includes that q axle rectified current internal ring regulates, the q axle rectified current reference of q shaft current internal ring ValueIt is 0, q axle rectified current value of feedback i of q shaft current internal ringzqFor the q axle component of rectified current, q axle rectified current reference ValueWith q axle rectified current value of feedback izqDeviation carry out current inner loop PI parameter regulation, obtain q axle closed loop regulation rectification Output valve；
PWM rectifier is obtained by the commutation output value of the commutation output value of d axle two close cycles regulation with the regulation of q axle closed loop Modulation ratio, and then obtain the PWM driving pulse ripple of PWM rectifier
Preferably, described voltage space vector control mode includes the d axle of the inversion output valve to inversion module Regulation and q axle regulate；
D axle is adjusted to: the regulation of d axle includes that the regulation of d axle inverter voltage outer shroud and d axle inverter current internal ring regulate；D shaft voltage The d axle inverter voltage reference value of outer shroudFor target phase voltage peak value Ud max, d axle inverter voltage value of feedback undFor through coordinate Inverter output voltage d axle component after conversion；By d axle inverter voltage reference valueWith d axle inverter voltage value of feedback undBetween Deviation regulates through outer voltage PI parameter, obtains the d axle inverter current reference value of d shaft current internal ringD axle inverter current is anti- Feedback value indFor inverter output current d axle component, by d axle inverter current reference valueWith d axle inverter current value of feedback indBetween Deviation through current inner loop PI parameter regulate, obtain d axle two close cycles regulation inversion output valve；
Q axle is adjusted to: the regulation of q axle includes that the regulation of inverter voltage outer shroud and inverter current internal ring regulate；Q shaft voltage outer shroud Inverter voltage reference valueIt is 0, q axle inverter voltage value of feedback unqDivide for the inverter output voltage q axle after coordinate transform Amount, by q axle inverter voltage reference valueWith q axle inverter voltage value of feedback unqBetween deviation through outer voltage PI parameter regulate, Obtain the inverter current reference value of q shaft current internal ringQ axle inverter current value of feedback i of q shaft current internal ringnqFor through coordinate Inverter output current q axle component after conversion, by q axle inverter current reference valueWith q axle inverter current value of feedback inqBetween Deviation regulates through current inner loop PI parameter, obtains the inversion output valve of q axle two close cycles regulation；
Inversion module is obtained by the inversion output valve of the inversion output valve of d axle two close cycles regulation with the regulation of q axle two close cycles Regulation carrier wave ratio, finally give the PWM driving pulse ripple of inversion module.
Preferably, work process also includes that short circuit current limitation controls process, uses hardware overcurrent protection control to limit with software The mode that flow control combines, hardware or the software either type of the short-circuit current limiting circuit that inversion module outfan is provided with detect When crossing stream, controller first blocks pwm pulse, the most again by software Current limited Control, is transitioned into short circuit current limitation control output constant Electric current.
The present invention having the beneficial effect that compared with prior art
1) in the control method of PWM rectifier, use unipolarity four-quadrant double-closed-loop control method, there is harmonic content Little, it is easy to eliminate, in each primitive period, the pulse number of unipolarity modulation is the twice of bipolar modulation, at identical switch Under frequency, the impulse wave frequency of unipolarity modulation is doubled；After dq converts by closed loop control q shaft current reference value it is Zero, it is achieved commutator unity power factor runs；
2) in PWM rectifier input dash current suppression, pre-charge circuit can make DC bus-bar voltage slowly rise, Thus input current impact is excessive when effectively suppressing uncontrollable rectification, at input voltage zero crossing, enable PWM rectifier, thus When making PWM rectifier soft start, input current impact diminishes；
3) inversion module uses SVPWM control mode, and wherein outer voltage main purpose is given current value and inversion mould The amplitude of block output voltage, and realize unity power factor control；The main purpose of current inner loop is by the output of outer voltage Current-order carries out electric current control, and internal ring current controller realizes the quick tracking of electric current, thus it is humorous effectively to reduce output voltage Ripple content and the utilization rate of raising DC bus-bar voltage；
4) in short circuit current limitation control, the method combined by hardware overcurrent protection and software Current limited Control, make short circuit Output electric current can well be controlled at limit value, and transcient short circuit time hardware overcurrent protection first plays a role, software current limliting afterwards Control to carry out Current limited Control；When excision short circuit enters Isobarically Control state, in order to reach burning voltage faster, inherit short circuit Before modulation ratio, PI parameter, control ring reference value, and then realize the quick control of output voltage.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described.
Embodiment 1
Seeing Fig. 1, the open a kind of AC-DC-AC type EMUs AuCT of the present invention, this AuCT includes controlling Device, pre-charge circuit, booster transformer, input filter circuit, rectification circuit, discharge circuit, inversion module, output filter circuit And output contactor.
Pre-charge circuit guarantees that DC bus-bar voltage slowly rises, input current impact when can effectively suppress uncontrollable rectification Excessive.Pre-charge circuit includes pre-charge resistance RC, pre-charge contactor IVK2 and main contactor IVK1.Pre-charge resistance RC with Pre-charge contactor IVK2 connect, main contactor IVK1 with connect after pre-charge resistance RC and pre-charge contactor IVK2 also Connection.
When AuCT starts, pre-charge contactor IVK2 closes, and medium voltage Support Capacitor FCU is by precharge electricity Resistance RC precharge, when on Support Capacitor FCU, voltage reaches certain level, pre-charge contactor IVK2 disconnects, AuCT Non-resistance works.
This AuCT input AC single-phase voltage is AC400V, and boosted transformator TR1 boosting is AC470V.Boosting Transformator TR1 has electrical isolation effect, and booster transformer TR1 secondary side leakage inductance forms LCL low pass filtered with input filter circuit Ripple device, input filter circuit includes input filter capacitor ACFC and input filter inductance ACL1.Input filter circuit is for defeated Enter electric current to be filtered, filter the high fdrequency component in electric current, the surge voltage on absorption circuit, it is to avoid AuCT is caused Damage.
This AuCT arranges voltage sensor and current sensor, voltage sensor and lines in parallel, current sense Device is connected with circuit.Voltage sensor includes input voltage sensor, middle rectifier output voltage sensor and AC output electricity Pressure sensor, current sensor includes commutator input current sensor, inversion module output current sensor and AC output electricity Flow sensor.
Input voltage sensor is in parallel with booster transformer TR1 outfan, commutator input current sensor and liter buckling Depressor TR1 outfan is connected, for input signal being carried out quality monitoring, in order to avoid AuCT is caused damage by change in electric Wound；Middle rectifier output voltage sensor is in parallel with rectifier output end, inversion module output current sensor and inversion mould Block outfan is connected, and for being monitored inversion module output signal, after preventing inversion, AuCT is caused damage by signal Wound；AC output voltage sensor is in parallel with output filter circuit outfan, and AC output current sensor is defeated with output filter circuit Go out end series connection, AuCT outlet side signal is monitored, it is to avoid signal of telecommunication fluctuation produces impact to late-class circuit.
Rectification circuit includes that 2 IGBT, to pipe, are respectively to pipe CONVU1 with to pipe CONVU2, module CONVU1 and module CONVU2 all includes two switching tubes, and the switching frequency of switching tube is 2.4KHz.IGBT is to pipe input and input filter circuit Connecting, IGBT is connected with Support Capacitor FCU, discharge resistance DCHKR, inversion module after pipe outfan parallel connection.Rectification circuit exists Coordinate with pre-charge circuit at input voltage zero crossing, use soft starting mode, suppression input dash current.Soft starting mode has Body is: after charging complete, it is judged that after rectification circuit input voltage zero crossing, and rectification circuit IGBT pipe is open-minded, carries out rectification work Industry.
Rectification circuit and front end LCL low pass filter collectively form PWM rectifier, and PWM rectifier uses unipolarity four-quadrant Limit double-closed-loop control algorithm, is i.e. adjusted at d axle and q axle the commutation output value of PWM rectifier respectively by dq coordinate system.
The regulation of d axle is particularly as follows: the regulation of d axle includes the regulation of d axle commutating voltage outer shroud and the regulation of d axle rectified current internal ring, d axle The d axle commutating voltage reference value of outer voltageMedium voltage U is exported for rectification targetdcref, in the middle of the target in the present embodiment Voltage UdcrefD axle commutating voltage value of feedback u for 850V, d shaft voltage outer shroudzdActual medium voltage for rectification output end Udact, d axle commutating voltage reference valueWith d axle commutating voltage value of feedback uzdBetween deviation through outer voltage PI parameter adjust Joint, obtains the rectified current reference value of d shaft current internal ringD axle rectified current value of feedback i of d shaft current internal ringzdFor passing through The d axle component of the rectified current after coordinate transform.Wherein, rectified current flow valuve is commutator input current sensor acquisition value, sits Mark conversion include clarke conversion and park convert, will rectified current flow valuve sequentially pass through clarke conversion with park convert obtain The d axle component of the rectified current under dq rotating coordinate system.D axle rectified current reference valueWith d axle rectified current value of feedback izdIt Between deviation carry out current inner loop PI parameter regulation, obtain d axle two close cycles regulation commutation output value.
Q axle regulates particularly as follows: q axle only has q axle rectified current internal ring to regulate, the q axle rectified current reference of q shaft current internal ring ValueIt is 0, q axle rectified current value of feedback i of q shaft current internal ringzqFor the q axle component of rectified current, q axle rectified current reference ValueWith q axle rectified current value of feedback izqDeviation carry out current inner loop PI parameter regulation, obtain q axle closed loop regulation rectification Output valve.
The commutation output value that the commutation output value regulated by d axle two close cycles and q axle closed loop regulate carries out coordinate transform and returns After one change processes, obtain the modulation ratio of PWM rectifier, and then obtain the PWM driving pulse ripple of PWM rectifier.
The PWM rectifier of the present invention uses unipolarity modulation system, due in each primitive period, and the arteries and veins of unipolarity modulation Rushing the twice that number is bipolar modulation, under identical switching frequency, the impulse wave frequency of unipolarity modulation doubles. The PWM rectifier work initial stage enters soft start duty, after rectifier output end voltage is more than DC700V, enters PI parameter Adjustment state, final rectifier output voltage is stable at DC850V.PWM rectifier act as: be unidirectional current by ac voltage rectifier Pressure；Use unipolarity four-quadrant double-closed-loop control algorithm, by output voltage stabilization in DC850V；Control input current waveform, make With input voltage same phase, thus realize PWM rectifier unity power factor run.
PWM rectifier outfan is connected with inversion module, the DC850V DC inversion that PWM rectifier is exported by inversion module For three-phase AC400V alternating current, for load.Inversion module uses three groups of IGBT to pipe, is respectively to pipe INVU1, to pipe INVU2 and to pipe INVU3, often group IGBT includes 2 switching tubes to Guan Jun, and the switching frequency of each switching tube is 2.4KHz, three groups IGBT is in parallel with PWM rectifier outfan to pipe input, and three groups of IGBT connect output filter circuit respectively to pipe outfan.
Inversion module uses voltage space vector control mode, i.e. by the inversion to inversion module of the dq coordinate system Output valve is adjusted respectively at d axle and q axle.
The regulation of d axle is particularly as follows: the regulation of d axle includes that the regulation of d axle inverter voltage outer shroud and d axle inverter current internal ring regulate.D axle The d axle inverter voltage reference value of outer voltageFor target phase voltage peak value Ud max, d axle inverter voltage value of feedback undFor passing through Inverter output voltage d axle component after coordinate transform.Wherein, inverter output voltage value is AC output voltage sensor collection value, Coordinate transform includes that clarke converts and park converts, and inverter output voltage value will sequentially pass through clarke conversion and park change Get the d axle component of inverter output voltage under dq rotating coordinate system in return.D axle inverter voltage reference valueWith d axle inverter voltage Value of feedback undBetween deviation through outer voltage PI parameter regulate, obtain the d axle inverter current reference value of d shaft current internal ring D axle inverter current value of feedback indFor inverter output current d axle component.Wherein, inverter output current value is inversion module output electricity Flow sensor collection value, coordinate transform includes that clarke conversion and park convert, will inverter output current value sequentially pass through Clarke conversion obtains the d axle component of the inverter output current under dq rotating coordinate system with park conversion.D axle inverter current reference ValueWith d axle inverter current value of feedback indBetween deviation through current inner loop PI parameter regulate, obtain d axle two close cycles regulation Inversion output valve.
The regulation of q axle is particularly as follows: the regulation of q axle includes that the regulation of inverter voltage outer shroud and inverter current internal ring regulate.Outside q shaft voltage The inverter voltage reference value of ringIt is 0, q axle inverter voltage value of feedback unqFor the inverter output voltage q axle after coordinate transform Component, wherein, inverter output voltage value is AC output voltage sensor collection value, and coordinate transform includes clarke conversion and park Conversion, inverter output voltage value will sequentially pass through clarke conversion and park to convert the inversion that obtains under dq rotating coordinate system defeated Go out the q axle component of voltage.Q axle inverter voltage reference valueWith q axle inverter voltage value of feedback unqBetween deviation through outer voltage PI parameter regulates, and obtains the q axle inverter current reference value of q shaft current internal ringThe q axle inverter current feedback of q shaft current internal ring Value inqFor the inverter output current q axle component after coordinate transform, wherein, inverter output current value is inversion module output electricity Flow sensor collection value, coordinate transform includes that clarke conversion and park convert, will inverter output current value sequentially pass through Clarke conversion obtains the q axle component of the inverter output current under dq rotating coordinate system with park conversion.Q axle inverter current reference ValueWith q axle inverter current value of feedback inqBetween deviation through current inner loop PI parameter regulate, obtain q axle two close cycles regulation Inversion output valve.
The inversion output valve of inversion output valve and the q axle two close cycles regulation that d axle two close cycles is regulated carry out coordinate transform and After normalized, obtain the regulation carrier wave ratio of inversion module, finally give the PWM driving pulse ripple of inversion module.Inversion mould Block uses above-mentioned voltage space vector control method, obtains the PWM driving pulse ripple of inversion module, so that inversion Module, under Double closed-loop of voltage and current, exports specified sine voltage.Wherein, inverter voltage outer shroud main purpose be to Determine current value and inversion module output voltage amplitude, it is achieved unity power factor control；Inverter current internal ring main purpose be by Output current-order according to inverter voltage outer shroud carries out electric current control, and inverter current internal ring realizes the fast track of inverter current.
Inverter voltage outer shroud and inverter current internal ring all use PI parameter regulative mode, can realize zero steady state error control, utilize Above-mentioned voltage space vector control method, can realize lower harmonic wave and higher DC voltage utilization rate.
Inversion module outfan is provided with short-circuit current limiting circuit, and short-circuit current limiting circuit is provided with hardware sample circuit, hardware current Protection circuit and comparison circuit, hardware sample circuit input exports current sense with inversion module output current sensor and AC Device connects, and hardware sample circuit outfan and hardware current protection circuit are connected with comparison circuit input, and comparison circuit exports End connects controller.Current sensor gathers this AuCT inversion module output electric current and AC exports electric current, hardware current Protection circuit arranges different short circuit current protection values by the resistance of differently configured resistance.When short circuit occurs, i.e. this is auxiliary Help current transformer inversion module output electric current and AC output current acquisition value when exceeding short circuit current protection value, hardware sample circuit and Hardware current protection circuit outfan exports pwm pulse locking signal after comparison circuit, is sent extremely by pwm pulse locking signal The pwm pulse control circuit of controller, forbids exporting pwm pulse.
Short-circuit current limiting circuit uses the mode that hardware overcurrent protection control combines with software Current limited Control, due to software Sampling has the regular hour to postpone, and when a short circuit occurs, first passes through hardware overcurrent protection and carries out overcurrent protection, enter back into afterwards Software Current limited Control.
The concrete control process of short-circuit current limiting circuit is: when short circuit occurs, hardware sample circuit detected stream or software After stream being detected, first block the pwm pulse in 10 switching frequency cycles, the most again by software Current limited Control, be transitioned into short Road Current limited Control output constant current.
Hardware detection crosses the process of stream: hardware current protection circuit passes through resistance configuration current protection value, works as inversion module When the current value of current sensor or AC output current sensor detection exceedes the hardware current protection value of setting, i.e. it is judged as hard Part detected stream；
Software detection crosses the process of stream: the current value of inversion module current sensor or AC output current sensor detection surpasses When crossing the current protection value that short-circuit current limiting circuit controls setting in software, i.e. it is judged as that software detection crosses stream；
Hardware detection crosses stream and software detection is crossed stream and worked simultaneously, as long as there being one to detect stream, the most first blocks 10 The pwm pulse in individual switching frequency cycle, then enters the software Current limited Control stage by software Current limited Control.Stream crossed by hardware afterwards Protection controls inoperative, only exports electric current by software Current limited Control.During excision short circuit, inherit the modulation ratio before short circuit, PI Parameter, current inner loop reference value and outer voltage reference value, it is ensured that consistent with output voltage before short circuit.
The outfan of inversion module is sequentially connected with output filter circuit and output contactor, and output filter circuit is to inversion mould Block output electric current is filtered, and including three-phase output reactance device and three-phase output filter capacitor, sees Fig. 1, three-phase output reactance Device is ACL2, and three-phase output filter capacitor is ACC.Three-phase output reactance device is connected with output filter circuit, three-phase output filtering Electric capacity is in parallel with output filter circuit, and three-phase output reactance device and three-phase output filter capacitor constitute LC filter circuit, filter electricity High fdrequency component in stream, the surge voltage on absorption circuit, prevent from AuCT is caused damage.Output contactor 3phMK Connect with output filter circuit, see Fig. 1, output contactor 3phMK for the outfan of this AuCT is controlled.
Above-mentioned AuCT, controls pre-charge circuit, booster transformer, input filter circuit, rectification by controller Circuit, discharge circuit, inversion module, output filter circuit and output contactor realize the AC-DC-AC of EMUs AuCT Auxiliary converter operation.By the soft starting mode of PWM rectifier so that AC-DC-AC AuCT has input impact electricity Flow little advantage；PWM rectifier uses unipolarity four-quadrant double-closed-loop control algorithm, has that harmonic content is little, easily eliminate advantage； In three-phase inversion module, introduce voltage space vector control mode, effectively reduce AuCT harmonic wave of output voltage Content, improves DC bus-bar voltage utilization rate；By setting up short-circuit current limiting circuit, hardware overcurrent protection control is used to limit with software The mode that flow control combines, when preventing AuCT short circuit operation, AC output electric current is too big, damages power device.
The work process of above-mentioned AuCT is: when AuCT starts, pre-charge circuit passes through pre-charge resistance RC starts to charge up, when Support Capacitor FCU voltage reaches certain level, pre-charge contactor IVK2 close, AuCT without Resistance performance；When this AuCT normally works, AuCT input AC single-phase voltage is AC400V, boosted transformation Device TR1 boosting for AC470V, after the PWM rectifier that input filter circuit and rectification circuit form output voltage stabilization in DC850V, PWM rectifier uses unipolarity four-quadrant double-closed-loop control algorithm, i.e. by whole to PWM rectifier of dq coordinate system Stream output valve is adjusted respectively at d axle and q axle, obtains the PWM drive signal of PWM rectifier, at the beginning of PWM rectifier works Phase, first carry out soft start duty, after PWM rectifier output voltage is more than DC700V, enter PI parameter adjustment state.Warp DC850V inversion is 3AC400V alternating current by inversion module, and inversion module uses voltage space vector control mode, i.e. Being adjusted the inversion output valve of inversion module respectively at d axle and q axle by dq coordinate system, the PWM obtaining inversion module drives Dynamic signal.The alternating current of inversion module output is air compressor, illumination and ARF after output filter circuit and output contactor Even load is powered.In above-mentioned work process, if short circuit occurs in circuit, entered by hardware overcurrent protection or software current-limiting protection Row protection, both are carried out simultaneously, enter back into software Current limited Control afterwards.

Claims (8)

1. an AC-DC-AC type EMUs AuCT, it is characterised in that: this AuCT include controller and with control The pre-charge circuit of device processed connection, booster transformer, input filter circuit, rectification circuit, discharge circuit, inversion module, output Filter circuit and output contactor, pre-charge circuit input electrically connects with single phase ac, and pre-charge circuit outfan is boosted It is connected with input filter circuit after transformator TR1；Rectification circuit input end is connected with input filter circuit, input filter circuit and The PWM rectifier of rectification circuit composition, rectification circuit output end is connected with inversion module through discharge circuit；Inversion module outfan It is connected with load through output filter circuit and output contactor.
AC-DC-AC type EMUs AuCT the most according to claim 1, it is characterised in that: described pre-charge circuit Including pre-charge resistance RC pre-charge contactor IVK2 and main contactor IVK1；Pre-charge resistance RC and pre-charge contactor IVK2 Series connection, main contactor IVK1 with connect after pre-charge resistance RC in parallel with pre-charge contactor IVK2.
AC-DC-AC type EMUs AuCT the most according to claim 1, it is characterised in that: this AuCT sets Putting voltage sensor and current sensor, voltage sensor and lines in parallel, current sensor is connected with circuit；Voltage sensor Including input voltage sensor, middle rectifier output voltage sensor and AC output voltage sensor, current sensor includes Commutator input current sensor, inversion module output current sensor and AC export current sensor；Input voltage sensor In parallel with booster transformer TR1 input, commutator input current sensor is connected with booster transformer TR1 outfan；Middle Rectifier output voltage sensor is in parallel with rectifier output end, inversion module output current sensor and inversion module outfan Series connection；AC output voltage sensor is in parallel with output filter circuit outfan, AC output current sensor and output filter circuit Outfan is connected.
AC-DC-AC type EMUs AuCT the most according to claim 3, it is characterised in that: this AuCT is also Being provided with short-circuit current limiting circuit, short-circuit current limiting circuit is arranged at inversion module outfan, and short-circuit current limiting circuit is provided with hardware sampling electricity Road, hardware current protection circuit and comparison circuit, hardware sample circuit input is connected with current sensor, hardware sample circuit Outfan and hardware current protection circuit are connected with comparison circuit input, and comparison circuit outfan connects controller.
5. the work process of the AuCT described in a claim 1, it is characterised in that include following work process:
When AuCT starts, pre-charge circuit charges, and when charging voltage reaches certain level, pre-charge circuit disconnects, AuCT is switched to no-resistance state work；When AuCT normally works, AuCT input single-phase alternating current Boosted transformator TR1 boosts；During input voltage zero crossing, enable PWM rectifier, through the unipolarity four-quadrant of PWM rectifier After double-closed-loop control algorithm, output voltage reaches stable DC voltage；Voltage space vector controlling party through inversion module Obtain after formula exporting specified three-phase alternating voltage；Power through output filter circuit and output contactor back loading.
The work process of AuCT the most according to claim 5, it is characterised in that: described unipolarity four-quadrant is double to be closed Ring control algolithm includes the regulation of d axle and the regulation of q axle of the commutation output value to PWM rectifier；
D axle is adjusted to: the regulation of d axle includes that the regulation of d axle commutating voltage outer shroud and d axle rectified current internal ring regulate, d shaft voltage outer shroud D axle commutating voltage reference valueMedium voltage U is exported for rectification targetdcref, the d axle commutating voltage feedback of d shaft voltage outer shroud Value uzdActual medium voltage U for rectification output enddact, by d axle commutating voltage reference valueWith d axle commutating voltage value of feedback uzdBetween deviation through outer voltage PI parameter regulate, obtain the rectified current reference value of d shaft current internal ringD shaft current D axle rectified current value of feedback i of internal ringzdFor the d axle component of the rectified current after coordinate transform, d axle rectified current is joined Examine valueWith d axle rectified current value of feedback izdBetween deviation carry out current inner loop PI parameter regulation, obtain d axle two close cycles adjust The commutation output value of joint；
Q axle is adjusted to: the regulation of q axle includes that q axle rectified current internal ring regulates, the q axle rectified current reference value of q shaft current internal ring It is 0, q axle rectified current value of feedback i of q shaft current internal ringzqFor the q axle component of rectified current, q axle rectified current reference value With q axle rectified current value of feedback izqDeviation carry out current inner loop PI parameter regulation, obtain q axle closed loop regulation rectification output Value；
The modulation of PWM rectifier is obtained by the commutation output value of the commutation output value of d axle two close cycles regulation with the regulation of q axle closed loop Ratio, and then obtain the PWM driving pulse ripple of PWM rectifier.
The work process of AuCT the most according to claim 5, it is characterised in that: described space vector of voltage SVPWM control mode includes the regulation of d axle and the regulation of q axle of the inversion output valve to inversion module；
D axle is adjusted to: the regulation of d axle includes that the regulation of d axle inverter voltage outer shroud and d axle inverter current internal ring regulate；D shaft voltage outer shroud D axle inverter voltage reference valueFor AC target phase voltage peak value Ud max, d axle inverter voltage value of feedback undFor becoming through coordinate Inverter output voltage d axle component after changing；By d axle inverter voltage reference valueWith d axle inverter voltage value of feedback undBetween inclined Difference regulates through outer voltage PI parameter, obtains the d axle inverter current reference value of d shaft current internal ringD axle inverter current feeds back Value indFor inverter output current d axle component, by d axle inverter current reference valueWith d axle inverter current value of feedback indBetween inclined Difference regulates through current inner loop PI parameter, obtains the inversion output valve of d axle two close cycles regulation；
Q axle is adjusted to: the regulation of q axle includes that the regulation of inverter voltage outer shroud and inverter current internal ring regulate；The inversion of q shaft voltage outer shroud Voltage reference valueIt is 0, q axle inverter voltage value of feedback unqFor the inverter output voltage q axle component after coordinate transform, by q Axle inverter voltage reference valueWith q axle inverter voltage value of feedback unqBetween deviation through outer voltage PI parameter regulate, obtain q The inverter current reference value of shaft current internal ringQ axle inverter current value of feedback i of q shaft current internal ringnqFor through coordinate transform After inverter output current q axle component, by q axle inverter current reference valueWith q axle inverter current value of feedback inqBetween deviation Regulate through current inner loop PI parameter, obtain the inversion output valve of q axle two close cycles regulation；
The tune of inversion module is obtained by the inversion output valve of the inversion output valve of d axle two close cycles regulation with the regulation of q axle two close cycles Joint carrier wave ratio, finally gives the PWM driving pulse ripple of inversion module.
The work process of AuCT the most according to claim 5, it is characterised in that: work process also includes short circuit limit Flow control process, uses the mode that hardware overcurrent protection control combines, when short circuit occurs, inversion mould with software Current limited Control When the hardware of the short-circuit current limiting circuit that block outfan is provided with or software either type detected stream, controller first blocks PWM arteries and veins Punching, the most again by software Current limited Control, is transitioned into short circuit current limitation and controls output constant current.
CN201610493360.9A 2016-06-28 2016-06-28 Hand over orthogonal type EMUs AuCT and work process thereof Pending CN106100359A (en)

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CN106787851A (en) * 2016-12-30 2017-05-31 广东工业大学 A kind of Single-phase PWM Rectifier control method for suppressing starting current
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