CN113141123B - Control method of electric automobile quick charging power converter - Google Patents

Control method of electric automobile quick charging power converter Download PDF

Info

Publication number
CN113141123B
CN113141123B CN202110373723.6A CN202110373723A CN113141123B CN 113141123 B CN113141123 B CN 113141123B CN 202110373723 A CN202110373723 A CN 202110373723A CN 113141123 B CN113141123 B CN 113141123B
Authority
CN
China
Prior art keywords
switching device
diode
proportional
input filter
regulator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110373723.6A
Other languages
Chinese (zh)
Other versions
CN113141123A (en
Inventor
郭小强
吴卓群
王宝诚
卢志刚
华长春
马瑞斯·马利诺夫斯基
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yanshan University
Original Assignee
Yanshan University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yanshan University filed Critical Yanshan University
Priority to CN202110373723.6A priority Critical patent/CN113141123B/en
Publication of CN113141123A publication Critical patent/CN113141123A/en
Application granted granted Critical
Publication of CN113141123B publication Critical patent/CN113141123B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
    • 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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in 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
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H02M1/15—Arrangements for reducing ripples from dc input or output using active 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters

Abstract

The invention discloses a control method of a quick charge power converter of an electric automobile, which belongs to the technical field of control of converters and comprises a three-phase PFC converter provided with a front stage rectification circuit and a rear stage boost circuit, wherein a switch device in the front stage rectification circuit is coupled with a switch device in the rear stage boost circuit, and the switch device in the front stage rectification circuit and the switch device in the rear stage boost circuit are jointly controlled, so that direct current inductive current ripples in the quick charge power converter of the electric automobile are reduced. The invention can effectively reduce the current ripple of the direct current side inductor and reduce the inductor loss, the electromagnetic interference and the current distortion degree of the power grid side under the conditions of not increasing the direct current inductor and not increasing the switching frequency, has simple control method and has practical engineering application value.

Description

Control method of electric automobile quick charging power converter
Technical Field
The invention relates to the technical field of control of converters, in particular to a control method of a quick-charging power converter of an electric vehicle.
Background
With the rapid development of the power electronics industry, PFC converters are widely used, such as electric vehicle chargers, renewable energy sources, smart grids, and the like. The PFC converter can realize the improvement of the power factor of the network side. Therefore, such PFC converters have been widely studied in recent years. However, the conventional control method of the PFC converter may cause large ripple of the inductor current in the converter, which may result in large inductor loss, large electromagnetic interference, and large distortion of the network-side current. Aiming at the problem, a novel Modulation method for reducing the inductive Current Ripple in the Current Source type rectifier is provided in an article, namely, an Optimal Space Vector Modulation of Current Source Converter for DC-Link Current Ripple Reduction, published in 2018 International journal IEEE Transaction on Industrial Electronics, and the novel Modulation method effectively reduces the loss on an inductor and the electromagnetic interference and the distortion degree of an alternating Current side by using three active vectors in each sector instead of using a zero Vector. The ripple prediction-based ripple reduction method is provided in a paper Variable switching frequency PWM for three-phase converters based on current prediction, which is published by IEEE Transaction on Industrial Electronics at Huazhong university of science and technology, and inhibits an inductive current ripple in a mode of changing a switching frequency, so that a good effect is obtained, but the problems of complex control algorithm, increased switching loss, difficult design of an output filter and the like caused by the change of the switching frequency are solved. On the premise of not avoiding the use of a zero vector and not changing the switching frequency, the improvement and innovation of the control method are carried out, and the reduction of the ripple of the inductive current in the converter can also be realized.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a control method of a fast charging power converter of an electric vehicle, which couples the on and off of front and rear stage switching devices to realize combined control on the premise of not avoiding using a zero vector and increasing the switching frequency, reduces the ripple on a direct current inductor, further reduces the inductance loss, reduces the switching loss, reduces electromagnetic interference, reduces the current distortion degree of a power grid side, and realizes the reduction of the ripple of the inductive current in the converter.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a control method of a fast charging power converter of an electric automobile comprises a three-phase PFC converter provided with a front-stage rectification circuit and a rear-stage boost circuit; the switching device in the preceding stage rectification circuit is coupled with the switching device in the later stage boosting circuit, and the switching device in the preceding stage rectification circuit acts according to a space vector modulation algorithm on the basis of the control of the proportional-integral regulator I and the proportional resonant regulator; the action of the switching device in the rear-stage boost circuit depends on the combined action of the first proportional-integral regulator, the proportional resonant regulator and a second proportional-integral regulator for controlling the rear-stage boost circuit, and the switching device in the front-stage rectifying circuit and the switching device in the rear-stage boost circuit are jointly controlled, so that the direct current inductance current ripple in the quick charging power converter of the electric automobile is reduced.
The technical scheme of the invention is further improved as follows:
the pre-stage rectifying circuit comprises a first alternating current power supply vaA second AC power supply vbA third AC power supply vcA first AC input filter capacitor C1A second AC input filter capacitor C2A third AC input filter capacitor C3First AC input filter inductor L1A second AC input filter inductor L2And a third AC input filter inductor L3A first switching device S1A second switching device S2A third switching device S3And a fourth switching device S4A fifth switching device S5And a sixth switching device S6A first diode D1A second diode D2A third diode D3A fourth diode D4A fifth diode D5A sixth diode D6；
The latter step-up circuit includes a seventh switching device S7The seventh diode D7D.C. inductor LpAn output voltage stabilizing capacitor C4And a resistive load RL；
The first AC power supply vaIs simultaneously connected with the second alternating current power supply vbSaid third AC power supply vcAre connected with each other, and the connection point is n'; the first AC power supply vaA head end in communication with the first ACInput filter inductance L1The tail ends are connected; said second AC power supply vbAnd the second AC input filter inductor L2The tail ends are connected; said third AC power supply vcA head end and the third AC input filter inductor L3The tail ends are connected;
the first AC input filter inductor L1A first end of the first AC input filter capacitor C1Head end, said first switching device S1Collector electrode, the fourth switching device S4The emitting electrodes are connected; the second AC input filter inductor L2A head end of the second AC input filter capacitor C2Head end, the third switching device S3Collector electrode, the sixth switching device S6The emitting electrodes are connected; the third AC input filter inductor L3A head end of the third AC input filter capacitor C3The head end of said fifth switching device S5Collector, the second switching device S2The emitting electrodes are connected; the first AC input filter capacitor C1The tail end of the second AC input filter capacitor C is connected with the first AC input filter capacitor C2A tail end, the third AC input filter capacitor C3The tail ends are connected, and the connection point is N;
the first switching device emitter S1And the first diode D1The conducting ends are connected; the fourth switching device S4Collector and the fourth diode D4The cut-off ends are connected; the third switching device S3An emitter and the third diode D3The conducting ends are connected; the sixth switching device S6Collector and the sixth diode D6The cut-off ends are connected; the fifth switching device S5Emitter and the fifth diode D5The conducting ends are connected; the second switching device S2Collector and the second diode D2The cut-off ends are connected;
the first diode D1A cut-off terminal is simultaneously connected with the third diode D2Cut-off terminal, the fifth diode D5Cut-off end, said straightFlow inductance LpThe tail ends are connected;
the fourth diode D4The conducting end is connected with the sixth diode D6A conducting terminal, the second diode D2Conducting terminal, seventh switching device S7Emitter and output voltage stabilizing capacitor C4Tail end, the resistive load RLThe tail ends are connected;
the direct current inductance LpHead end simultaneously with said seventh switching device S7Collector electrode, the seventh diode D7The conducting ends are connected; the seventh diode D7The cut-off end is simultaneously connected with the output voltage-stabilizing capacitor C4Head end, the resistive load RLThe head ends are connected.
The technical scheme of the invention is further improved as follows: the combined control specifically comprises the following steps:
first switching device S of preceding stage rectification circuit1A second switching device S2A third switching device S3And a fourth switching device S4A fifth switching device S5And a sixth switching device S6Based on the control of the proportional integral regulator I and the proportional resonant regulator, performing action according to a space vector modulation algorithm; seventh switching device S of the latter step-up circuit7The action depends on the combined action of the first proportional-integral regulator, the second proportional-integral regulator which controls the post-stage boosting circuit and the proportional-integral regulator;
the preceding stage rectification circuit outputs the bridge arm output voltage udcThe feedback quantity of the output voltage of the bridge arm enters a proportional integral regulator I as a feedback quantity, the feedback quantity is subjected to series operation with a power grid voltage angle theta obtained by a phase-locked loop PLL to obtain a reference current, finally, a modulation degree m is obtained through operation of a proportional resonant regulator, and according to the modulation degree m, a space vector modulation algorithm sends a pulse with corresponding duration to a first switching device S of a preceding stage rectification circuit1A second switching device S2A third switching device S3And a fourth switching device S4A fifth switching device S5And a sixth switching device S6So that the bridge arm outputs a voltage udcAverage value being set referenceA value; meanwhile, if the front stage rectification circuit is in a zero vector state, the first proportional-integral regulator and the first proportional resonant regulator are used for the seventh switching device S in the rear stage boosting circuit7Sending an action signal I, if the pre-stage rectifying circuit is in an active vector state, the proportional integral regulator I and the proportional resonant regulator do not align the switching device S7Sending out an action signal;
the later-stage boosting circuit loads the resistance load voltage u0As a feedback quantity, the feedback quantity enters a second proportional-integral regulator, and after being compared with a carrier wave, a seventh switching device S in a post-stage boosting circuit is subjected to comparison7Sending out a second action signal, entering a logic operation link by the first action signal and the second action signal, carrying out OR logic operation, and finally carrying out an operation on a seventh switching device S of a post-stage booster circuit7Sending out a pulse signal;
when the front-stage rectification circuit is in three zero vector states, signals are sent out through the first proportional-integral regulator, the second proportional-integral regulator and the proportional resonant regulator to enter a logic operation link, and finally a conducting signal is sent out to a seventh switching device S in the rear-stage boosting circuit7So that the seventh switching device S in the subsequent boost circuit7Is always in a conducting state, so that the DC inductance L in the post-stage booster circuitpThe voltage across the terminals being zero, i.e. the direct current inductance LpThe current ripple on the capacitor is zero;
when the front-stage rectification circuit is in six active vector states, the first proportional-integral regulator and the first proportional resonant regulator do not align to the switching device S7Sending out a signal, and sending out an action signal to a seventh switching device S of a post-stage boosting circuit by the second proportional-integral regulator7And conducting and switching off to meet the requirement of the output voltage.
The technical scheme of the invention is further improved as follows: one end of the component is a head end, and the other end of the component is a tail end.
The technical scheme of the invention is further improved as follows: the first switching device S1The second switching device S2The third switching device S3The fourth switching device S4The fifth switching device S5The sixth switching device S6The seventh switching device S7Are all switch tubes.
The technical scheme of the invention is further improved as follows:
the first AC input filter capacitor C1The second AC input filter capacitor C2The third AC input filter capacitor C3Are all thin film capacitors;
the output voltage-stabilizing capacitor C4Is an electrolytic capacitor;
the first AC input filter inductor L1The second AC input filter inductor L2The third AC input filter inductor L3Are all filter inductors;
the inductance LpIs a direct current inductance;
the first diode D1A second diode D2A third diode D3A fourth diode D4A fifth diode D5A sixth diode D6The seventh diode D7Are all power diodes.
The technical scheme of the invention is further improved as follows: output voltage udcThe feedback is obtained by the voltage hall.
The technical scheme of the invention is further improved as follows: the first proportional-integral regulator is a first PI regulator; the proportional resonance regulator is a PR regulator; and the second proportional-integral regulator is a PI regulator II.
Due to the adoption of the technical scheme, the invention has the technical progress that:
1. the invention couples the front-stage and rear-stage switching devices by improving the traditional control method that the front-stage and rear-stage switching devices are not coupled, and performs combined control on the front-stage and rear-stage switches, thereby effectively reducing the current ripple of the direct current inductor in the electric vehicle quick charging power converter, reducing the switching frequency, reducing the electromagnetic interference, reducing the inductor loss, reducing the current distortion degree of the power grid side, and effectively improving the working efficiency of the converter without increasing the direct current inductance value and the switching frequency.
2. The invention adopts the front stage of the electric vehicle quick charging power converter to generate a driving signal in a space vector modulation mode and send the driving signal to a front stage switching device; the on and off of a rear-stage switch device of the electric automobile quick charge power converter and the on and off of a front-stage switch of the electric automobile quick charge power converter are coupled, so that the reduction of inductive current ripples is realized under the conditions of not increasing direct current inductance and not increasing switching frequency.
3. The invention realizes the frequency conversion and duty ratio control of the post-stage booster circuit, reduces the switching times of the switching tube of the post-stage circuit, and reduces the ripple wave on the direct current inductor by the control method of coupling the switching tubes of the front-stage circuit and the rear-stage circuit.
4. The method is simple in implementation process and has practical engineering application value.
Drawings
FIG. 1 is a schematic diagram of an electric vehicle fast charging power converter circuit and a control method according to the present invention;
FIG. 2 is a circuit diagram of a fast charging power converter of an electric vehicle according to the present invention;
FIG. 3 is a diagram of the ripple of the DC inductor current and the pulse signal of the switching tube in the conventional control method according to the present invention;
FIG. 4 is a diagram of the ripple of the DC inductor current and the pulse signal of the switching tube in the novel control method of the present invention;
fig. 5 is a control flow diagram of the present invention.
Detailed Description
The invention relates to a control method for reducing inductive current ripples in a fast charging power converter of an electric automobile, which can reduce the inductive current ripples, weaken electromagnetic interference and reduce the distortion degree of network side current without increasing switching frequency and inductance value.
The invention is described in further detail below with reference to the following figures and examples:
as shown in fig. 1 and 2, a control method for a fast charging power converter of an electric vehicle includes a three-phase PFC converter provided with a front stage rectification circuit and a rear stage boost circuit, and is characterized in that: in the preceding stage rectification circuitSwitching device (S)1、S2、S3、S4、S5、S6) A switching device (S) in the preceding stage rectification circuit coupled to the switching device in the succeeding boost circuit1、S2、S3、S4、S5、S6) Performing action according to a current mode space vector modulation algorithm (C-SVM) based on the control of a PI regulator I and a PR regulator; switching device (S) in the subsequent boost circuit7) The action depends on the combined action of the PI regulator I and the PR regulator of the front-stage rectification circuit and the PI regulator II of the rear-stage boost circuit, the switch device in the front-stage rectification circuit and the switch device in the rear-stage boost circuit are jointly controlled, and therefore direct current inductive current ripples in the quick charging power converter of the electric automobile are reduced.
As shown in FIG. 2, the pre-stage rectification circuit includes a first AC power supply vaA second AC power supply vbA third AC power supply vcA first AC input filter capacitor C1A second AC input filter capacitor C2A third AC input filter capacitor C3First AC input filter inductor L1A second AC input filter inductor L2And a third AC input filter inductor L3A first switching device S1A second switching device S2A third switching device S3And a fourth switching device S4A fifth switching device S5And a sixth switching device S6A first diode D1A second diode D2A third diode D3A fourth diode D4A fifth diode D5A sixth diode D6；
The latter step-up circuit includes a seventh switching device S7The seventh diode D7D.C. inductor LpAn output voltage stabilizing capacitor C4And a resistive load RL；
The first switching device S1The second switching device S2The third switching device S3The fourth switching device S4The fifth switching device S5The sixth switching device S6The seventh switching device S7Are all switch tubes;
the first AC input filter capacitor C1The second AC input filter capacitor C2The third AC input filter capacitor C3Are all thin film capacitors;
the output voltage-stabilizing capacitor C4Is an electrolytic capacitor;
the first AC input filter inductor L1The second AC input filter inductor L2The third AC input filter inductor L3Are all filter inductors, said inductor LpIs a direct current inductance;
the first diode D1A second diode D2A third diode D3A fourth diode D4A fifth diode D5A sixth diode D6The seventh diode D7Are all power diodes.
For convenience, one end of each of the components is set as a head end, and the other end is set as a tail end.
The first AC power supply vaIs simultaneously connected with the second alternating current power supply vbSaid third AC power supply vcAre connected with each other, and the connection point is n'; the first AC power supply vaA head end and the first AC input filter inductor L1The tail ends are connected; said second AC power supply vbAnd the second AC input filter inductor L2The tail ends are connected; said third AC power supply vcA head end and the third AC input filter inductor L3The tail ends are connected;
the first AC input filter inductor L1A first end of the first AC input filter capacitor C1Head end, said first switching device S1Collector electrode, the fourth switching device S4The emitting electrodes are connected; the second AC input filter inductor L2A head end of the second AC input filter capacitor C2Head end, the third switching device S3Collector electrodeThe sixth switching device S6The emitting electrodes are connected; the third AC input filter inductor L3A head end of the third AC input filter capacitor C3The head end of said fifth switching device S5Collector, the second switching device S2The emitting electrodes are connected; the first AC input filter capacitor C1The tail end of the second AC input filter capacitor C is connected with the first AC input filter capacitor C2A tail end, the third AC input filter capacitor C3The tail ends are connected, and the connection point is N;
the first switching device emitter S1And the first diode D1The conducting ends are connected; the fourth switching device S4Collector and the fourth diode D4The cut-off ends are connected; the third switching device S3An emitter and the third diode D3The conducting ends are connected; the sixth switching device S6Collector and the sixth diode D6The cut-off ends are connected; the fifth switching device S5Emitter and the fifth diode D5The conducting ends are connected; the second switching device S2Collector and the second diode D2The cut-off ends are connected;
the first diode D1A cut-off terminal is simultaneously connected with the third diode D2Cut-off terminal, the fifth diode D5Cut-off terminal, the direct current inductance LpThe tail ends are connected;
the fourth diode D4The conducting end is connected with the sixth diode D6A conducting terminal, the second diode D2Conducting terminal, seventh switching device S7Emitter and output voltage stabilizing capacitor C4Tail end, the resistive load RLThe tail ends are connected;
the direct current inductance LpHead end simultaneously with said seventh switching device S7Collector electrode, the seventh diode D7The conducting ends are connected; the seventh diode D7The cut-off end is simultaneously connected with the output voltage-stabilizing capacitor C4Head end, the resistive load RLThe head ends are connected.
The combined control specifically comprises the following steps:
first switching device S of preceding stage rectification circuit1A second switching device S2A third switching device S3And a fourth switching device S4A fifth switching device S5And a sixth switching device S6Performing action according to a space vector modulation algorithm based on the control of the PI regulator I and the PR regulator; seventh switching device S of the latter step-up circuit7The action depends on the combined action of the PI regulator I, the PR regulator and a PI regulator II for controlling a later-stage boosting circuit;
the preceding stage rectification circuit outputs the bridge arm output voltage udcAs a feedback quantity (output voltage u)dcFeedback is obtained by a voltage Hall), bridge arm output voltage feedback quantity enters a PI (proportional integral) regulator I, a reference current is obtained after serial operation is carried out on the bridge arm output voltage feedback quantity and a power grid voltage angle theta obtained by a phase-locked loop PLL (phase locked loop), finally, a modulation degree m is obtained through the operation of a PR (pulse-forward) regulator, and according to the modulation degree m, a space vector modulation algorithm sends pulses with corresponding duration to a first switching device S of a preceding stage rectification circuit1A second switching device S2A third switching device S3And a fourth switching device S4A fifth switching device S5And a sixth switching device S6So that the bridge arm outputs a voltage udcThe average value is a set reference value, if the pre-stage rectification circuit is in a zero vector state, the PI regulator I and the PR regulator simultaneously carry out the regulation on a seventh switching device S in the post-stage boosting circuit7Sending an action signal I, if the front stage rectification circuit is in an active vector state, the PI regulator I and the PR regulator do not carry out control on a seventh switching device S in the rear stage boosting circuit7Sending out an action signal;
the later-stage boosting circuit loads the resistance load voltage u0As a feedback quantity, the feedback quantity enters a second PI regulator, and after being compared with a carrier wave, the feedback quantity is used for a seventh switching device S in a post-stage boosting circuit7Sending out a second action signal, entering a logic operation link by the first action signal and the second action signal, carrying out OR logic operation, and finally carrying out an operation on a seventh switching device S of a post-stage booster circuit7Send outA pulse signal;
when the front-stage rectification circuit is in three zero vector states, signals are sent out through the first PI regulator, the second PR regulator and the third PI regulator to enter a logic operation link, and finally a conducting signal is sent out to a seventh switching device S in the rear-stage boosting circuit7So that the seventh switching device S in the subsequent boost circuit7Is always in a conducting state, so that the DC inductance L in the post-stage booster circuitpThe voltage across the terminals being zero, i.e. the direct current inductance LpThe current ripple on the capacitor is zero;
when the front-stage rectification circuit is in six active vector states, signals are sent out through the PI regulator I, the PR regulator and the PI regulator II to enter a logic operation link, and finally an action signal is sent out to a seventh switching device S of a rear-stage boosting circuit7And conducting and switching off to meet the requirement of the output voltage.
Specifically, the method comprises the following steps: as shown in fig. 1, the control method is directed to an electric vehicle fast charging power converter topology; switching device S in pre-stage rectification circuit1、S2、S3、S4、S5、S6The proportional integral controller I and the space vector modulation algorithm are used for acting, so that the bridge arm output voltage udcThe average value of (1) is a set reference voltage value; when the preceding stage rectification circuit is in three zero vector states, namely the preceding stage rectification circuit is in three straight-through states: s1And S4，S3And S6，S5And S2When the first proportional-integral regulator of the front-stage rectification circuit, the second proportional-integral regulator of the proportional resonant regulator and the second proportional-integral controller of the rear-stage boost circuit are respectively conducted, signals are sent to a logic operation link, and finally the signals are sent to a seventh switching device S7Sends out a signal so that S7Is always in a conducting state, so that the direct current inductance LpVoltage u acrossLpIs zero, i.e. direct current inductance LpCurrent ripple i ondcIs zero; when the front stage rectification circuit is in six active vector states, namely the front stage rectification circuit is in a non-straight-through state: s1And S2，S1And S6，S3And S4，S3And S2，S5And S4，S5And S6When the first proportional integral regulator and the proportional resonant regulator are respectively conducted, the first proportional integral regulator and the proportional resonant regulator do not supply S7Sending out a signal, and giving S by the proportional-integral controller7Sending an action signal to S7Self-acting to meet the output voltage requirement.
As shown in fig. 4, it is a diagram of the pulse signal and the dc inductor current ripple of the switching tube in the control method of the present invention; obviously different from the pulse signal and the dc inductor current ripple diagram of the switching tube in the conventional control method as shown in fig. 3,
the working mode of the circuit under the control method of the invention is shown in table 1.
TABLE 1
Figure BDA0003010368010000131
In summary, the pre-stage rectification circuit of the electric vehicle fast charging power converter generates the driving signal in the space vector modulation manner and sends the driving signal to the switching device in the pre-stage rectification circuit; the on and off of the switch device in the post-stage boost circuit of the electric vehicle quick charge power converter and the on and off of the switch device of the pre-stage rectification circuit of the electric vehicle quick charge power converter are coupled, and on and off of the post-stage switch device and the switch device of the pre-stage rectification circuit of the electric vehicle quick charge power converter are coupled to realize combined control on the premise of not using zero vectors and not increasing switching frequency, so that ripples on direct current inductance are reduced, further inductance loss is reduced, switching loss is reduced, electromagnetic interference is reduced, the current distortion degree of a power grid side is reduced, and the ripples of inductive current in the converter are reduced.

Claims (7)

1. A control method of a fast charging power converter of an electric automobile comprises a three-phase PFC converter provided with a front stage rectification circuit and a rear stage boost circuit, and is characterized in that: the switching device in the preceding stage rectification circuit is coupled with the switching device in the later stage boosting circuit, and the switching device in the preceding stage rectification circuit acts according to a space vector modulation algorithm on the basis of the control of the proportional-integral regulator I and the proportional resonant regulator; the action of a switching device in the rear-stage boost circuit depends on the combined action of the first proportional-integral regulator, the proportional resonant regulator and a second proportional-integral regulator for controlling the rear-stage boost circuit, and the switching device in the front-stage rectifying circuit and the switching device in the rear-stage boost circuit are jointly controlled, so that the direct current inductance current ripple in the quick charging power converter of the electric automobile is reduced;
the combined control specifically comprises the following steps:
first switching device S of preceding stage rectification circuit1A second switching device S2A third switching device S3And a fourth switching device S4A fifth switching device S5And a sixth switching device S6Based on the control of the proportional integral regulator I and the proportional resonant regulator, performing action according to a space vector modulation algorithm; seventh switching device S of the latter step-up circuit7The action depends on the combined action of the first proportional-integral regulator, the second proportional-integral regulator which controls the post-stage boosting circuit and the proportional-integral regulator;
the preceding stage rectification circuit outputs the bridge arm output voltage udcThe feedback quantity of the output voltage of the bridge arm enters a proportional integral regulator I as a feedback quantity, the feedback quantity is subjected to series operation with a power grid voltage angle theta obtained by a phase-locked loop PLL to obtain a reference current, finally, a modulation degree m is obtained through operation of a proportional resonant regulator, and according to the modulation degree m, a space vector modulation algorithm sends a pulse with corresponding duration to a first switching device S of a preceding stage rectification circuit1A second switching device S2A third switching device S3And a fourth switching device S4A fifth switching device S5And a sixth switching device S6So that the bridge arm outputs a voltage udcThe average value is a set reference value; meanwhile, if the front stage rectification circuit is in a zero vector state, the first proportional-integral regulator and the first proportional resonant regulator are used for the seventh switching device S in the rear stage boosting circuit7Sending an action signal I, if the pre-stage rectification circuit is in an active vector state, the proportional integral regulator I and the proportional resonant regulator are not in a state ofTo the switching device S7Sending out an action signal;
the later-stage boosting circuit loads the resistance load voltage u0As a feedback quantity, the feedback quantity enters a second proportional-integral regulator, and after being compared with a carrier wave, a seventh switching device S in a post-stage boosting circuit is subjected to comparison7Sending out a second action signal, entering a logic operation link by the first action signal and the second action signal, carrying out OR logic operation, and finally carrying out an operation on a seventh switching device S of a post-stage booster circuit7Sending out a pulse signal;
when the front-stage rectification circuit is in three zero vector states, signals are sent out through the first proportional-integral regulator, the second proportional-integral regulator and the proportional resonant regulator to enter a logic operation link, and finally a conducting signal is sent out to a seventh switching device S in the rear-stage boosting circuit7So that the seventh switching device S in the subsequent boost circuit7Is always in a conducting state, so that the DC inductance L in the post-stage booster circuitpThe voltage across the terminals being zero, i.e. the direct current inductance LpThe current ripple on the capacitor is zero;
when the front-stage rectification circuit is in six active vector states, the first proportional-integral regulator and the first proportional resonant regulator do not align to the switching device S7Sending out a signal, and sending out an action signal to a seventh switching device S of a post-stage boosting circuit by the second proportional-integral regulator7And conducting and switching off to meet the requirement of the output voltage.
2. The control method of the electric vehicle quick charging power converter according to claim 1, characterized in that:
the pre-stage rectifying circuit comprises a first alternating current power supply vaA second AC power supply vbA third AC power supply vcA first AC input filter capacitor C1A second AC input filter capacitor C2A third AC input filter capacitor C3First AC input filter inductor L1A second AC input filter inductor L2And a third AC input filter inductor L3A first switching device S1The first stepTwo switching devices S2A third switching device S3And a fourth switching device S4A fifth switching device S5And a sixth switching device S6A first diode D1A second diode D2A third diode D3A fourth diode D4A fifth diode D5A sixth diode D6；
The latter step-up circuit includes a seventh switching device S7The seventh diode D7D.C. inductor LpAn output voltage stabilizing capacitor C4And a resistive load RL；
The first AC power supply vaIs simultaneously connected with the second alternating current power supply vbSaid third AC power supply vcAre connected with each other, and the connection point is n'; the first AC power supply vaA head end and the first AC input filter inductor L1The tail ends are connected; said second AC power supply vbAnd the second AC input filter inductor L2The tail ends are connected; said third AC power supply vcA head end and the third AC input filter inductor L3The tail ends are connected;
the first AC input filter inductor L1A first end of the first AC input filter capacitor C1Head end, said first switching device S1Collector electrode, the fourth switching device S4The emitting electrodes are connected; the second AC input filter inductor L2A head end of the second AC input filter capacitor C2Head end, the third switching device S3Collector electrode, the sixth switching device S6The emitting electrodes are connected; the third AC input filter inductor L3A head end of the third AC input filter capacitor C3The head end of said fifth switching device S5Collector, the second switching device S2The emitting electrodes are connected; the first AC input filter capacitor C1The tail end of the second AC input filter capacitor C is connected with the first AC input filter capacitor C2A tail end, the third AC input filter capacitor C3The tail ends are connected, and the connection point is N;
the first switching device S1Emitter and the first diode D1The conducting ends are connected; the fourth switching device S4Collector and the fourth diode D4The cut-off ends are connected; the third switching device S3An emitter and the third diode D3The conducting ends are connected; the sixth switching device S6Collector and the sixth diode D6The cut-off ends are connected; the fifth switching device S5Emitter and the fifth diode D5The conducting ends are connected; the second switching device S2Collector and the second diode D2The cut-off ends are connected;
the first diode D1A cut-off terminal is simultaneously connected with the third diode D3Cut-off terminal, the fifth diode D5Cut-off terminal, the direct current inductance LpThe tail ends are connected;
the fourth diode D4The conducting end is connected with the sixth diode D6A conducting terminal, the second diode D2Conducting terminal, seventh switching device S7Emitter and output voltage stabilizing capacitor C4Tail end, the resistive load RLThe tail ends are connected;
the direct current inductance LpHead end simultaneously with said seventh switching device S7Collector electrode, the seventh diode D7The conducting ends are connected; the seventh diode D7The cut-off end is simultaneously connected with the output voltage-stabilizing capacitor C4Head end, the resistive load RLThe head ends are connected.
3. The control method of the electric vehicle quick charging power converter according to claim 2, characterized in that: one end of the component is a head end, and the other end of the component is a tail end.
4. The control method of the electric vehicle quick charging power converter according to claim 2, characterized in that:
the first switching device S1Station, stationThe second switching device S2The third switching device S3The fourth switching device S4The fifth switching device S5The sixth switching device S6The seventh switching device S7Are all switch tubes.
5. The control method of the electric vehicle quick charging power converter according to claim 2, characterized in that:
the first AC input filter capacitor C1The second AC input filter capacitor C2The third AC input filter capacitor C3Are all thin film capacitors;
the output voltage-stabilizing capacitor C4Is an electrolytic capacitor;
the first AC input filter inductor L1The second AC input filter inductor L2The third AC input filter inductor L3Are all filter inductors, said inductor LpIs a direct current inductance;
the first diode D1A second diode D2A third diode D3A fourth diode D4A fifth diode D5A sixth diode D6The seventh diode D7Are all power diodes.
6. The control method of the electric vehicle quick charging power converter according to claim 1, characterized in that: output voltage udcThe feedback is obtained by the voltage hall.
7. The control method of the electric vehicle quick charging power converter according to claim 1, characterized in that: the first proportional-integral regulator is a first PI regulator; the proportional resonance regulator is a PR regulator; and the second proportional-integral regulator is a PI regulator II.
CN202110373723.6A 2021-04-07 2021-04-07 Control method of electric automobile quick charging power converter Active CN113141123B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110373723.6A CN113141123B (en) 2021-04-07 2021-04-07 Control method of electric automobile quick charging power converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110373723.6A CN113141123B (en) 2021-04-07 2021-04-07 Control method of electric automobile quick charging power converter

Publications (2)

Publication Number Publication Date
CN113141123A CN113141123A (en) 2021-07-20
CN113141123B true CN113141123B (en) 2021-09-10

Family

ID=76810587

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110373723.6A Active CN113141123B (en) 2021-04-07 2021-04-07 Control method of electric automobile quick charging power converter

Country Status (1)

Country Link
CN (1) CN113141123B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105897099A (en) * 2016-05-27 2016-08-24 同济大学 Control method for bidirectional quasi-Z-source inversion type motor driving system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106330039B (en) * 2016-10-24 2018-08-14 东南大学 A kind of permanent magnet synchronous motor control algolithm of low capacity thin-film capacitor frequency convertor system
CN106972750B (en) * 2017-03-16 2018-08-10 合肥工业大学 Tricyclic fixed-frequency control method based on BUCK-LLC two-stage DC/DC converters
CN107681929B (en) * 2017-10-30 2023-11-28 广东美的制冷设备有限公司 Motor control system and variable frequency air conditioner
CN111416514B (en) * 2020-04-17 2021-01-26 河北汇能欣源电子技术有限公司 Parallel current-sharing control method for three-phase voltage-reduction PFC circuit
CN112152489B (en) * 2020-09-23 2021-08-03 南京信息工程大学 High-low voltage direct current dual-output integrated three-phase PWM rectifier converter and control method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105897099A (en) * 2016-05-27 2016-08-24 同济大学 Control method for bidirectional quasi-Z-source inversion type motor driving system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"A Composite Control Strategy for Suppression the Current Harmonic at the Grid Side of V2G Charger";Xin Gao,等;《2018 2nd IEEE Advanced Information Management,Communicates,Electronic and Automation Control Conference(IMCEC)》;20180924;全文 *
"Simple Direct Power Control of Three-Phase PWM Rectifier Using Space-Vector Modulation(DPC-SVM)";Mariusz Malinowski,等;《IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS》;20040430;第51卷(第2期);全文 *

Also Published As

Publication number Publication date
CN113141123A (en) 2021-07-20

Similar Documents

Publication Publication Date Title
US10523112B2 (en) Power converter and method of controlling the same
CN108512431A (en) Double rectification alternating expression full-bridge single stage power factor correction power circuits and control method
CN110920422B (en) High-power electric vehicle charging device based on current source and control method
CN113135109B (en) Topological structure of high-power charging device of electric automobile
Pandey et al. Canonical switching cell (CSC) converter-based power factor-corrected battery charger for e-rickshaw
CN113489309A (en) Bridgeless buck power factor correction converter with wide output voltage and control method
CN114257097B (en) Wide-output direct-current converter with multi-mode switching and switching control thereof
CN109842182B (en) Power supply system
CN113765358A (en) Single-stage interleaved parallel AC-DC resonant conversion circuit and control method thereof
CN113141123B (en) Control method of electric automobile quick charging power converter
CN208638340U (en) Change-over switch transformation and control circuit
WO2023193914A1 (en) Charger for wide input/output voltage regulation
CN113890406A (en) Bridgeless single-stage isolation AC-DC converter and control method thereof
Zhang et al. A hybrid Si/SiC CCM interleaved totem-pole bridgeless PFC converter with coupled-inductor and hybrid-frequency interleaving operation
CN203691227U (en) Big-power three-phase active power correction circuit
CN111193406A (en) Direct-current converter, conversion method with wide output voltage range and vehicle charger
Luo et al. A primary shunt inductor compensated inductive power transfer system with natural ZVS for battery charging application
CN217545873U (en) Power factor correction circuit and electronic equipment
CN214591155U (en) Leading adjustable boost circuit of pulse power supply for electrostatic precipitator
Chand et al. Power Quality Enhanced EV Charger Using Cuk Converter
CN211183825U (en) High-power-factor AC/DC converter of symmetrical charge pump
CN219225041U (en) Feedback type high-frequency induction heating power supply aging circuit
CN210578299U (en) Photovoltaic inverter based on gallium nitride device
Chaurasiya et al. A High-Power Density Portable Charger for E-Mopeds and E-Rickshaw
CN114204799A (en) Digital low-carbon power supply

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant