CN106411163A - Control method of three-phase three-switch three-level high power factor rectifier - Google Patents
Control method of three-phase three-switch three-level high power factor rectifier Download PDFInfo
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- CN106411163A CN106411163A CN201611071741.4A CN201611071741A CN106411163A CN 106411163 A CN106411163 A CN 106411163A CN 201611071741 A CN201611071741 A CN 201611071741A CN 106411163 A CN106411163 A CN 106411163A
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- 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
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4233—Arrangements for improving power factor of AC input using a bridge converter comprising active switches
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a control method of a three-phase three-switch three-level high power factor rectifier. In the method, triangular wave comparison control and one-cycle control are combined. Double-closed-loop control is adopted, an outer loop is a direct current voltage loop, an inner loop is an alternating current loop, and finally output of a triangular wave comparator is used to control on and off of a switch. During triangular wave comparison control, when a current is a negative value, an output modulated wave is reversed; and during the one-cycle control, IiaI is introduced and is taken as a feedback amount so that operation is performed. A three-phase software phase-locked loop does not need to detect three-phase power grid phase information so that calculating time is saved. A three-phase power-grid voltage is directly divided by a real-time power grid peak value voltage so as to acquire three-phase power grid synchronization signals va1, vb1 and vc1 which have a same phase with a phase of a three-phase power grid voltage and whose amplitudes are 1.
Description
Technical field：
The invention belongs to field of power electronics, it is related to a kind of high-power factory rectifier, especially a kind of three-phase three switchs
The control method of three multi-level high-power factory rectifiers.
Background technology：
With the development of Power Electronic Technique, the power quality problem of AC power supply system receives more and more attention.
Traditional rectification link widely used diode uncontrollable rectifier or Thyristor Controlled rectification circuit. electrical network is filled with substantial amounts of humorous
Involve idle. cause serious pollution.Improve grid side power factor and reduce Harmonics of Input unit power because
Number commutator becomes study hotspot.
The control method that three-phase three-switch three-level high-power factory rectifier adopts at present mainly has three kinds：
Space vector pulse width modulation：Three-phase three-switch three-level commutator is made up of 3 brachium pontis, and each brachium pontis has 3 to open
Off status, a total of 27 kinds of on off states.But the symmetry due to three-phase current, the polarity of three-phase current can not be simultaneously just or
It is negative, therefore three-phase three-switch three-level commutator does not have 111 and two kinds of on off states of -1-1-1, the sum of therefore on off state is
25.Using SVPWM vector controlled, electric current interval has 6, and the interval on off state of each electric current has 8, therefore space vector
There is 8*6=48, vector state is many, control complicated, calculate the time long.It is difficult to for switching frequency to bring up to more than 10K, therefore need
Want the occasion of high-frequency PWM commutator, vector controlled is more limited.
Hysteresis control：Hysteresis control is a conventional double-closed-loop control, and outer shroud is Voltage loop, and internal ring is electric current loop, outward
The phase signal of three-phase voltage is multiplied by the output of ring pi regulator respectively, just obtains the reference signal of three-phase alternating current.This benchmark
After signal is compared with actual ac current signal, its error amount delivers to hysteresis comparator, carrys out controlling switch by the output of comparator
Break-make.This control method ensure that input current and line voltage homophase, and controls VD.Using stagnant ring control
The PWM rectifier system structure of system is simply it is easy to devices at full hardware is realized, and dynamic performance is excellent, and current-responsive is fast.But it lacks
Point is also apparent from：The switching frequency change of its power tube acutely, is followed the tracks of poor, when frequency is high, switching loss is big when frequency is low.
Cycle Control：It is exactly the dutycycle controlling switching tube in each switch periods, make the stable state of switching variable average
Value is equal to or is directly proportional to reference quantity.
SVPWM Control Method, vector state is many, controls complicated, calculates the time long.It is difficult to switch frequency
Rate brings up to more than 10K it is therefore desirable to the occasion of high-frequency PWM commutator, and vector controlled is more limited.
Using Hysteresis control, the switching frequency change of its power tube acutely, follows the tracks of poor, frequency Gao Shikai when frequency is low
Close loss big.
Cycle Control, directly controls the dutycycle of the switching tube of a cycle, belongs to Average Current Control, to current tracking
Ability, poor anti jamming capability.
Content of the invention：
It is an object of the invention to overcoming the shortcoming of above-mentioned prior art, a kind of three-phase three of energy single-phase flow is provided to open
Close three multi-level high-power factory rectifiers, compared with being traditionally used for powerful three-phase full-bridge rectifier, have certain excellent
Gesture, three level nature make the voltage stress on switching tube only have the half of output voltage, select under powerful application scenario
Switching tube is easier, and output voltage ripple is little, input filter small volume, reduces electric current THD.With three-level rectifier phase
Required switching tube is reduced to 3 by 12 to ratio, and cost reduces, and controls simple.Therefore, three-phase tri-level High Power Factor rectification
Device may replace existing diode rectification or thyristor rectifier, is widely used in industrial system, improves the quality of power supply.
The purpose of the present invention to solve by the following technical programs：
The control method of three-phase three-switch three-level high-power factory rectifier, is to control and single-revolution control triangle wave
System is combined；Using double-closed-loop control, outer shroud is direct current pressure ring, and internal ring is alternating current ring, finally by triangle wave
The output of device carrys out the break-make of controlling switch；When triangle wave controls, when electric current is for negative value, the modulating wave of output is reverse, and
Introduce in Cycle Control | ia| carry out for feedback quantity.
The data volume of collection is three-phase alternating voltage va、vb、vc, three-phase alternating current ia、ib、ic, DC voltage Vdc1、
Vdc2；Using three-phase power grid voltage divided by real-time grid crest voltage, obtaining one with three-phase power grid voltage same phase, amplitude is 1
Three phase network synchronizing signal va1、vb1、vc1；Upper capacitance voltage Vdc1With lower capacitance voltage Vdc2Addition obtains DC voltage Vdc.
Also include a grading ring；
The composition of direct current pressure ring：DC voltage gives VdcrefWith DC voltage VdcDifference send into Voltage loop PI adjust
Device, obtains the output V of Voltage loop pi regulatordcpiout；The purpose of direct current pressure ring is stable DC terminal voltage；
The composition of alternating current ring：The output V of Voltage loop pi regulatordcpioutIt is multiplied by three phase network synchronizing signal respectively
va1、vb1、vc1After obtain signal iaref、ibref、icref, signal iaref、ibref、icrefSignal i after taking absolute valuearef1、ibref1、
icref1The input of electric current loop gives；Three-phase alternating current ia、ib、icTake absolute value and obtain electric current loop input signal ia1、ib1、ic1；
Given value of current iaref1、ibref1、icref1With electric current loop input signal ia1、ib1、ic1Difference send into electric current loop pi regulator, obtain
The output i of electric current loop pi regulatorpiouta、ipioutb、ipioutc；The load condition output acting as according to DC terminal of electric current loop
Watt current；
Upper capacitance voltage Vdc1With lower capacitance voltage Vdc2Difference send into grading ring pi regulator, constitute Pressure and Control
Ring；The acting as of Pressure and Control ring balances upper and lower capacitance voltage, makes upper and lower capacitance voltage equal；
Three phase network synchronizing signal va1、vb1、vc1Signal v is obtained after deducting Pressure and Control ringa2、vb2、vc2, 1 deducts va2、
vb2、vc2Absolute value after be multiplied by proportionality coefficient k obtain three-phase front feedback value A phase feedforward, B phase feedforward, C phase feedforward；
The output i of electric current loop pi regulatorpiouta、ipioutb、ipioutc；Plus the feedforward of three-phase front feedback value A phase, the feedforward of B phase, C
After mutually feedovering, send into triangle wave unit, generate 3 road PWM driving switch pipes.
The beneficial effects of the present invention is：It is to control triangle wave to be combined with Cycle Control.Control and still draw
Enter double-closed-loop control, outer shroud is Voltage loop, internal ring is electric current loop, finally the logical of controlling switch is come by the output of triangle wave device
Disconnected.Because UAN is not only relevant with off state during Hysteresis control, also relevant with the sense of current it is therefore desirable to be negative value in electric current
When will output modulating wave reversely, and in Cycle Control, the dutycycle of commutator and the absolute value of input current are relevant, therefore,
Introduce in control | ia| carrying out for feedback quantity, therefore not needing the modulating wave as exporting when electric current is for negative value in Hysteresis control
Reversely.
Brief description：
Fig. 1 is the three-phase three-switch three-level high-power factory rectifier structural representation of the present invention；
Fig. 2 is the three-phase three-switch three-level high-power factory rectifier control block diagram of the present invention.
Specific embodiment：
Below in conjunction with the accompanying drawings the present invention is described in further detail：
Referring to Fig. 1,2, be by triangle wave control and Cycle Control be combined；Using double-closed-loop control, outer shroud is
Direct current pressure ring, internal ring is alternating current ring, is finally carried out the break-make of controlling switch by the output of triangle wave device；Triangular wave ratio
When relatively controlling, when electric current is for negative value by the modulating wave of output reversely, introduce in Cycle Control | ia| carry out for feedback quantity.
When three-phase mains voltage is symmetrical, have：
It is assumed that VIENNA works in ccm mode, da、db、dcIt is respectively switching tube Sa、Sb、ScThe dutycycle of drive signal,
Have：
Commutator input and output voltage and switching tube drive the relation between dutycycle.
In order to realize unity power factor it should accomplish that each phase input current follows each phase input voltage respectively, i.e. each phase
Input impedance be purely resistive, define ReMutually input equivalent resistance for each.The control targe of therefore VIENNA rectifier is intended to make
Three-phase input voltage, input current meet：
Finally give commutator input and output voltage and switching tube drives the relation between dutycycle.
Therefore, the dutycycle of commutator and the absolute value of input current are relevant, therefore, introduce in the controlling | ia| for feedback
Amount is carried out.
When three-phase mains voltage is symmetrical, have：
It is assumed that VIENNA works in ccm mode, da、db、dcIt is respectively switching tube Sa、Sb、ScThe dutycycle of drive signal,
Have：
Commutator input and output voltage and switching tube drive the relation between dutycycle.
In order to realize unity power factor it should accomplish that each phase input current follows each phase input voltage respectively, i.e. each phase
Input impedance be purely resistive, define ReMutually input equivalent resistance for each.The control targe of therefore VIENNA rectifier is intended to make
Three-phase input voltage, input current meet：
Finally give commutator input and output voltage and switching tube drives the relation between dutycycle.
Therefore, the dutycycle of commutator and the absolute value of input current are relevant, therefore, introduce in the controlling | ia| for feedback
Amount.
The data volume needing collection is three-phase alternating voltage va、vb、vc, three-phase alternating current ia、ib、ic, DC voltage
Vdc1、Vdc2.
Control method as herein described, detects three phase network phase information without three-phase software phase-lock loop, when saving calculating
Between, directly use three-phase power grid voltage divided by real-time grid crest voltage, obtain one and three-phase power grid voltage same phase, amplitude
Three phase network synchronizing signal v for 1a1、vb1、vc1.
Upper capacitance voltage Vdc1With lower capacitance voltage Vdc2Addition obtains DC voltage Vdc.
Control section includes three loops altogether：Direct current pressure ring, alternating current ring, grading ring.
The composition of direct current pressure ring：DC voltage gives VdcrefWith DC voltage VdcDifference send into Voltage loop PI adjust
Device, obtains the output V of Voltage loop pi regulatordcpiout.The purpose of direct current pressure ring is stable DC terminal voltage.
The composition of alternating current ring：The output V of Voltage loop pi regulatordcpioutIt is multiplied by three phase network synchronizing signal respectively
va1、vb1、vc1After obtain signal iaref、ibref、icref, signal iaref、ibref、icrefSignal i after taking absolute valuearef1、ibref1、
icref1The input of electric current loop gives.Three-phase alternating current ia、ib、icTake absolute value and obtain electric current loop input signal ia1、ib1、ic1.
Given value of current iaref1、ibref1、icref1With electric current loop input signal ia1、ib1、ic1Difference send into electric current loop pi regulator, obtain
The output i of electric current loop pi regulatorpiouta、ipioutb、ipioutc.The load condition output acting as according to DC terminal of electric current loop
Watt current.
Upper capacitance voltage Vdc1With lower capacitance voltage Vdc2Difference send into grading ring pi regulator, constitute Pressure and Control
Ring.The acting as of Pressure and Control ring balances upper and lower capacitance voltage, makes upper and lower capacitance voltage equal.
Three phase network synchronizing signal va1、vb1、vc1Signal v is obtained after deducting Pressure and Control ringa2、vb2、vc2, 1 deducts va2、
vb2、vc2Absolute value after be multiplied by proportionality coefficient k obtain three-phase front feedback value A phase feedforward, B phase feedforward, C phase feedforward.
The output i of electric current loop pi regulatorpiouta、ipioutb、ipioutc.Plus the feedforward of three-phase front feedback value A phase, the feedforward of B phase, C
After mutually feedovering, send into triangle wave unit, generate 3 road PWM driving switch pipes.
Above content is to further describe it is impossible to assert with reference to specific preferred implementation is made for the present invention
The specific embodiment of the present invention is only limitted to this, for general technical staff of the technical field of the invention, is not taking off
On the premise of present inventive concept, some simple deduction or replace can also be made, all should be considered as belonging to the present invention by institute
The claims submitted to determine scope of patent protection.
Claims (3)
1. three-phase three-switch three-level high-power factory rectifier control method it is characterised in that：It is by triangle wave control
System and Cycle Control are combined；Using double-closed-loop control, outer shroud is direct current pressure ring, and internal ring is alternating current ring, finally by
The output of triangle wave device carrys out the break-make of controlling switch；When triangle wave controls, when electric current is for negative value by the tune of output
Ripple processed reversely, and introduces in Cycle Control | ia| carry out for feedback quantity.
2. control method as claimed in claim 1 it is characterised in that：The data volume of collection is three-phase alternating voltage va、vb、vc,
Three-phase alternating current ia、ib、ic, DC voltage Vdc1、Vdc2；Using three-phase power grid voltage divided by real-time grid crest voltage, obtain
Three phase network synchronizing signal v that one is 1 with three-phase power grid voltage same phase, amplitudea1、vb1、vc1；Upper capacitance voltage Vdc1With under
Capacitance voltage Vdc2Addition obtains DC voltage Vdc.
3. control method as claimed in claim 1 it is characterised in that：
Also include a grading ring；
The composition of direct current pressure ring：DC voltage gives VdcrefWith DC voltage VdcDifference send into Voltage loop pi regulator, obtain
Output V to Voltage loop pi regulatordcpiout；The purpose of direct current pressure ring is stable DC terminal voltage；
The composition of alternating current ring：The output V of Voltage loop pi regulatordcpioutIt is multiplied by three phase network synchronizing signal v respectivelya1、vb1、
vc1After obtain signal iaref、ibref、icref, signal iaref、ibref、icrefSignal i after taking absolute valuearef1、ibref1、icref1Electricity
The input of stream ring gives；Three-phase alternating current ia、ib、icTake absolute value and obtain electric current loop input signal ia1、ib1、ic1；Electric current is given
Determine iaref1、ibref1、icref1With electric current loop input signal ia1、ib1、ic1Difference send into electric current loop pi regulator, obtain electric current loop
The output i of pi regulatorpiouta、ipioutb、ipioutc；The load condition acting as according to DC terminal of electric current loop exports active electricity
Stream；
Upper capacitance voltage Vdc1With lower capacitance voltage Vdc2Difference send into grading ring pi regulator, constitute Pressure and Control ring；All
Pressure control ring act as balance upper and lower capacitance voltage, make upper and lower capacitance voltage equal；
Three phase network synchronizing signal va1、vb1、vc1Signal v is obtained after deducting Pressure and Control ringa2、vb2、vc2, 1 deducts va2、vb2、vc2
Absolute value after be multiplied by proportionality coefficient k obtain three-phase front feedback value A phase feedforward, B phase feedforward, C phase feedforward；
The output i of electric current loop pi regulatorpiouta、ipioutb、ipioutc；Plus the feedforward of three-phase front feedback value A phase, the feedforward of B phase, C phase front
After feedback, send into triangle wave unit, generate 3 road PWM driving switch pipes.
Priority Applications (1)
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| CN201611071741.4A CN106411163B (en) | 2016-11-29 | 2016-11-29 | The control method of three-phase three-switch three-level high-power factory rectifier |
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|---|---|---|---|
| CN201611071741.4A CN106411163B (en) | 2016-11-29 | 2016-11-29 | The control method of three-phase three-switch three-level high-power factory rectifier |
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| CN106411163B CN106411163B (en) | 2019-03-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713929A (en) * | 2019-01-07 | 2019-05-03 | 三峡大学 | A kind of three switch of three-phase, two level rectifier based on Zero-voltage soft switch |
| CN113794369A (en) * | 2021-09-17 | 2021-12-14 | 北京迪赛奇正科技有限公司 | Three-phase PFC and PWM modulation method based on BUCK circuit |
| CN115954924A (en) * | 2023-03-15 | 2023-04-11 | 广东电网有限责任公司佛山供电局 | Multi-port flexible loop closing switch and control method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713929A (en) * | 2019-01-07 | 2019-05-03 | 三峡大学 | A kind of three switch of three-phase, two level rectifier based on Zero-voltage soft switch |
| CN113794369A (en) * | 2021-09-17 | 2021-12-14 | 北京迪赛奇正科技有限公司 | Three-phase PFC and PWM modulation method based on BUCK circuit |
| CN113794369B (en) * | 2021-09-17 | 2024-06-11 | 北京迪赛奇正科技有限公司 | Three-phase PFC and PWM modulation method based on BUCK circuit |
| CN115954924A (en) * | 2023-03-15 | 2023-04-11 | 广东电网有限责任公司佛山供电局 | Multi-port flexible loop closing switch and control method thereof |
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| CN106411163B (en) | 2019-03-12 |
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