CN109639160A - Novel unidirectional three-phase tri-level rectifier based on soft switch technique - Google Patents
Novel unidirectional three-phase tri-level rectifier based on soft switch technique Download PDFInfo
- Publication number
- CN109639160A CN109639160A CN201811482810.XA CN201811482810A CN109639160A CN 109639160 A CN109639160 A CN 109639160A CN 201811482810 A CN201811482810 A CN 201811482810A CN 109639160 A CN109639160 A CN 109639160A
- Authority
- CN
- China
- Prior art keywords
- switch
- voltage
- diode
- main switch
- capacitor
- 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.)
- Granted
Links
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
- H02M7/2173—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 biphase or polyphase circuit arrangement
-
- 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
- H02M1/42—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
-
- 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
- H02M1/4241—Arrangements for improving power factor of AC input using a resonant converter
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0012—Control circuits using digital or numerical techniques
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
-
- 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
Novel unidirectional three-phase tri-level rectifier based on soft switch technique, including unidirectional three level rectifying circuit, resonance circuit, buffer loop, voltage sampling circuit, current sampling circuit, Zero-cross comparator circuit, DSP control module, PWM drive circuit.Wherein unidirectional three-phase tri-level commutating circuit forms three rectifying bridge arms by 6 power switch tubes, effectively reduces number of elements, simplifies structure, reduces costs.Resonant tank is made of resonant inductance, clamp capacitor, auxiliary switch etc., and main switch can be made to realize that no-voltage is open-minded, effectively reduce switching loss and switching noise.Buffer loop is made of 6 capacitors in parallel with main switch, and the turn off process of main switch can be made softer.Using the above structure, utilize double circle controling mode, current inner loop and outer voltage are all made of PI and control the control method combined with SVPWM, to effectively inhibit harmonic wave, realize the stable output and net side unity power factor control of ac-side current sine, voltage.
Description
Technical field
The present invention relates to three-phase rectifier technical field, specifically a kind of novel unidirectional three-phase three based on soft switch technique
Level rectifier.
Background technique
With the rapid development of power electronic technique, power electronic equipment increasingly increases in daily life and work production
It is more, it is the electric railways equipment such as the applied power supply of various high-quality, electrically-driven car, frequency conversion speed-adjusting system, all kinds of new
Energy power generation etc..Multilevel technology is as improving system performance and improving the important technology of system working efficiency, in new energy
The high-power fields such as source inventer is grid-connected, distributed DC power generation, transmission system obtain more and more from academia and industry
The favor on boundary.Since the demand of the characteristics such as the high pressure resistant of power electronic equipment, high frequency, high voltage, large capacity is increasingly strong, pass
Uniting, there is many bottlenecks for being difficult to break through in large-power occasions utilization for two level converters.With two conventional level rectifiers
It compares, the main circuit structure of three-level rectifier is although more complicated, but because it is inhibiting harmonic wave, increase power factor, is subtracting
It the advantages of small voltage stress etc., is just concerned by people more and more.
Furthermore with the fast development of power electronic technique, switch power technology is constantly improved and is innovated, however
With Switching Power Supply lightweight, high frequency, the development trend of high-voltage power, pass is opened brought by the raising of switching frequency
A series of problems, such as breakdown consumption and switching noise, can not be ignored.For these problems, soft switch technique is just suggested, that is, is being switched
Resonance link is introduced before and after process, so that switching tube voltage before opening first is down to zero, current value is first down to zero before shutdown.This
In device during turning on and off, the overlapping of voltage and current is eliminated sample, substantially reduces switching loss.Meanwhile drawing
The resonance link entered limits the change rate of voltage and current in switching process, so that switching noise is also obviously reduced,
Soft switch technique ensure that further increasing for working frequency.
Summary of the invention
It is an object of the invention to propose a kind of novel unidirectional three-phase tri-level rectifier based on soft switch technique, effectively
Switching loss and switching noise caused by traditional hard switching are solved, number of elements is reduced, reduces and simplifies structure, reduce cost.
The technical scheme adopted by the invention is as follows:
Novel unidirectional three-phase tri-level rectifier based on soft switch technique, including commutating circuit, resonance circuit, buffer back
Road, sample circuit, zero cross detection circuit, DSP control module, PWM drive circuit；
The commutating circuit is made of 3 rectifying bridge arms, and each rectifying bridge arm is by 2 power switch tube Ssx1、Sx2, 2 points
The clamp diode not being in parallel with power switch tube and 2 fast recovery diode Dx1、Dx2Composition；
Rectifying bridge arm 1:Sa1Collector and its anti-paralleled diode cathode, fast recovery diode Da1Anode and buffering electricity
Hold one end to be connected；Sa2Collector and its anti-paralleled diode cathode, fast recovery diode Da1Anode and buffering capacitor one end phase
Even；Sa1Emitter and its anti-paralleled diode anode, fast recovery diode Da2Cathode and buffering capacitor one end are connected；Sa2Hair
Emitter-base bandgap grading and its anti-paralleled diode anode, buffering capacitor one end and resonant inductance LrOne end is connected.
Rectifying bridge arm 2:Sb1Collector and its anti-paralleled diode cathode, fast recovery diode Db1Anode and buffering electricity
Hold one end to be connected；Sb2Collector and its anti-paralleled diode cathode, fast recovery diode Db1Anode and buffering capacitor one end phase
Even；Sb1Emitter and its anti-paralleled diode anode, fast recovery diode Db2Cathode and buffering capacitor one end are connected；Sb2Hair
Emitter-base bandgap grading and its anti-paralleled diode anode, buffering capacitor one end and resonant inductance LrOne end is connected.
Rectifying bridge arm 3:Sc1Collector and its anti-paralleled diode cathode, fast recovery diode Dc1Anode and buffering electricity
Hold one end to be connected；Sc2Collector and its anti-paralleled diode cathode, fast recovery diode Db1Anode and buffering capacitor one end phase
Even；Sc1Emitter and its anti-paralleled diode anode, fast recovery diode Db2Cathode and buffering capacitor one end are connected；Sc2Hair
Emitter-base bandgap grading and its anti-paralleled diode anode, buffering capacitor one end and resonant inductance LrOne end is connected.
The resonance circuit is by resonant inductance Lr, auxiliary switch S3, shunt capacitance C3And clamp capacitor CcComposition.S3Collector
With resonant inductance LrOne end, anti-parallel diodes anode and shunt capacitance C3One end is connected；S3Emitter and two pole of reverse parallel connection
Tube cathode, shunt capacitance C3The other end and clamp capacitor CcOne end is connected.Capacitor CcThe other end and resonant inductance LrThe other end and in
Site n is connected.Using the above structure, by introduce auxiliary switch come control circuit resonance at the beginning of, make resonant inductance and
Only before main switch is opened resonance occurs for resonant capacitance, so that generating resonance current is that shunt capacitance carries out charge and discharge, based on open
Close the condition that no-voltage is opened of creating.
The buffer loop capacitor in parallel by 6 power devices and therewith forms.So that its both ends after switch OFF
Voltage cannot be mutated, and turn off process is softer, reduce switching loss.
The sample circuit include Hall voltage current sensor constitute, for realizing DC side with exchange side voltage, electricity
The detection of stream samples.Sample circuit uses high-precision dedicated sampling A/D chip AD7606, carries filter function in piece.Furthermore it adopts
Power network current or DC side electric current are become into low current with the LA58-P Hall sensor of LEM company.Line voltage sample circuit
Using the TV16E voltage transformer of the Dechang Yao Hua company, specified input current is 2.5mA.DC voltage sample circuit uses
LEM company LV28 type voltage hall sensor measures DC voltage, and former secondary no-load voltage ratio parameter is 2500:1000, specified input electricity
Stream is 10mA, and voltage rating range is up to 500V, minimum 10V.
The zero cross detection circuit, for detecting the voltage zero-crossing point of power grid moment, using DSP control module to network voltage
Zero crossing captured, realize the locking phase of mains frequency.
The DSP control module, for acquiring data, realization control strategy, controlling main circuit switch device.
DSP control module may be selected TI company C2000 series DSP, C2000 series DSP be TI company aim at real-time control apply and
Design.In view of requirement, arithmetic speed and the soft-switch PWM rectifier to memory of switching frequency, program of PWM rectifier
A process resonance circuit more than common PWM rectifier, more auxiliary switches, the F28335 of final choice C2000 series
As control chip.
The PWM drive circuit, for driving the unidirectional three-phase tri-level rectifier switch pipe.PWM drive circuit uses
The ePWM module of F28335, it is contemplated that the present invention needs altogether 7 tunnel PWM waves and an e PWM submodule can issue two-way PWM
Wave, therefore 4 ePWM submodules are needed to configure altogether.
A kind of novel unidirectional three-phase tri-level rectifier based on soft switch technique of the present invention, has the following beneficial effects:
1, the rectifier only needs 6 main switches, effectively reduces number of elements, therefore the loss generated is smaller, simplifies
Structure reduces costs, and can effectively inhibit harmonic wave, realizes net side unity power factor control.
2, the present invention uses soft switch technique, resonant tank is increased on the basis of former rectifier, in switch conduction leading
Enter resonance link, so that switching tube voltage before opening first is down to zero, in device during turning on and off, voltage and current
Overlapping be eliminated.The noise generated in switching process is also reduced while being reduced to switching loss close to zero to improve
The reliability of switching device.
3, the present invention uses double circle controling mode, and current inner loop and outer voltage are all made of PI control, has and inhibits note
Enter the harmonic wave of power grid, realizes ac-side current sine and unity power factor, improves current tracking ability, system control stabilization
The advantages that.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples:
Fig. 1 is a kind of novel unidirectional main topology diagram of three-phase tri-level rectifier based on soft switch technique of the present invention；
Fig. 2 is a kind of novel unidirectional three-phase tri-level rectifier switch timing diagram based on soft switch technique of the present invention；
Fig. 3 is a kind of novel unidirectional three-phase tri-level rectifier working condition one based on soft switch technique of the present invention；
Fig. 4 is a kind of novel unidirectional three-phase tri-level rectifier working condition two based on soft switch technique of the present invention；
Fig. 5 is a kind of novel unidirectional three-phase tri-level rectifier working condition three based on soft switch technique of the present invention；
Fig. 6 is a kind of novel unidirectional three-phase tri-level rectifier working condition four based on soft switch technique of the present invention
Fig. 7 is a kind of novel unidirectional three-phase tri-level rectifier working condition five based on soft switch technique of the present invention；
Fig. 8 is a kind of novel unidirectional three-phase tri-level rectifier control block diagram based on soft switch technique of the present invention；
Fig. 9 is a kind of novel unidirectional three-phase tri-level input side rectifier Current Voltage based on soft switch technique of the present invention
Waveform diagram；
Figure 10 is a kind of novel unidirectional three-phase tri-level rectifier main switch S based on soft switch technique of the present inventionc2The change of current
U in the processCEAnd UGEWaveform diagram；
Figure 11 is a kind of novel unidirectional three-phase tri-level rectifier main switch S based on soft switch technique of the present inventionc2The change of current
U in the processCEAnd UGEWaveform diagram after amplification.
Specific embodiment
Fig. 1 show a kind of novel unidirectional main topology of three-phase tri-level rectifier based on soft switch technique of the present invention, Va
(t)、Vb(t)、VcIt (t) is respectively three-phase power grid voltage, ia、ib、icFor net side input current, L is net side filter inductance, three-phase filter
Wave inductance L is equal in magnitude, C1、C2For capacitor above and below DC side, Sa1、Sa2、Sb1、Sb2、Sc1、Sc2To constitute the rectifier rectification bridge
6 IGBT switching tubes, Da1、Da2、Db1、Db2、Dc1、Dc2For 6 fast recovery diodes for constituting the rectifier rectification bridge.
The present invention is based on the novel unidirectional three-phase tri-level rectifier of soft switch technique, there are three types of rectification states: state 1 is
Pass through switch SX1With diode DX1Conduction obtain；State 2 is as switch SX1And SX2It is obtained when simultaneously turning on；State 3 is
By switch SX2With diode DX2Conduction obtain.It, can be by 6 main switches in circuit point according to position in circuit
It is 3 pairs: Sa、Sb、Sc.Each bridge arm has 3 effective switch states (1,0, -1), and meets
Neutral point n is enabled to keep dynamic electric voltage balance, andUanThere are 3 kinds of level respectively
UabThere are five types of levelThe rectifier known to formula (1-1) shares 27 kinds of working conditions, with
(011), the realization of Sofe Switch is illustrated for (010), (110) three kinds of operating modes, as shown in fig. 3 to 7:
One (t of stage0-t1): the corresponding work vector of the stage rectifier is (011), main switch Sa1、Sa2、Sb1、Sc1And
Auxiliary switch S3Conducting, electric current iaThrough main switch Sa1、Sa2Site n in arrival, electric current ibFlow through main switch Sb1And diode Db1Afterwards
Reach n point, electric current icThrough main switch Sc1And diode Dc1Reach n point.At this time
Two (t of stage1-t2): t1Moment, auxiliary switch S3Shutdown, resonant inductance LrWith main switch Sc2Shunt capacitance also
Auxiliary switch S3Shunt capacitance C3Carry out resonance, LrTo main switch Sc2Shunt capacitance discharge, to C3It charges.It arrives
t2Moment, main switch Sc2The voltage at shunt capacitance both ends is reduced to zero, and resonance stops, and opens S at this timec2, then switch Sc2It is in zero electricity
It is opened under the conditions of pressure.
Three (t of stage2-t3): the corresponding work vector of the stage rectifier is (010), main switch Sa1、Sa2、Sb1、Sc1And
Sc2Conducting, electric current iaThrough main switch Sa1、Sa2Site n in arrival, electric current ibFlow through main switch Sb1And diode Db1After reach n
Point, electric current icThrough main switch Sc1、Sc2Site n in arrival.At this timeResonant inductance LrWith main switch
Sb2Shunt capacitance and capacitor C3Carry out resonance, LrTo Sb2Shunt capacitance charges, to C3It discharges.To t3Moment C3
The voltage at both ends is reduced to zero, and resonance stops, and opens S at this time3, then S3It is open-minded under zero voltage condition.
Four (t of stage3-t4): t3From moment, main switch Sa1、Sa2、Sb1、Sc1、Sc2And auxiliary switch S3Conducting,
By resonant inductance Lr, auxiliary switch S3With clamping capacitance CcL in the resonant tank of compositionrTo CcCharging.
Five (t of stage4-t5): arrive t4Moment, main switch Sa2Shutdown.The corresponding work vector of rectifier is (110) at this time, main
Switch Sa1、Sb1、Sc1、Sc2And S is connected in auxiliary switch3.Electric current iaFlow through main switch Sa1And diode Da1Site n in reaching afterwards；Electricity
Flow ibFlow through main switch Sb1And diode Db1N point is reached afterwards；Electric current icThrough main switch Sc1、Sc2N point is reached afterwards.At this time
The rectifier mathematical model is as follows:
Van、VbnThe respectively voltage of rectifier bridge input point a, b site n into DC side, VnoFor DC side n point to O point
Voltage.
Fig. 2 show the major-minor switch matching timing figure of the rectifier, as can be seen from Figure 2 main switch Sc2Before opening
Need auxiliary switch S3Movement carries out resonance, to generate resonance current, resonance current is to main switch Sc2Shunt capacitance carry out
Electric discharge is Sc2No-voltage open and create conditions.Sa2It is opened when shutdown by the buffer function reduction of switching tube both ends shunt capacitance
Close the turn-off power loss of pipe.
Fig. 8 show the rectifier control block diagram, and using double circle controling mode, current inner loop is all made of with outer voltage
PI control.
Route design parameter is as follows:
Input voltage virtual value is 110V, frequency 50Hz, DC side output voltage 350V, switching frequency 10kHz, filtered electrical
Feel L=5mH, DC bus capacitor C1=C2=4400 μ F, resonant inductance L in resonance circuitr=50 μ H, paralleled power switches capacitor Ca1
=Ca2=Cb1=Cb2=Cc1=Cc2=33nF, clamping capacitance Cc=45nF, auxiliary switch shunt capacitance C3=5.04nF.
Specific control process is as follows:
(1) by sample circuit to network voltage Ua(t)、Ub(t)、Uc(t), ac-side current ia(t)、ib(t)、ic(t)
And the upper and lower capacitance voltage U of DC sidedc1、Udc2It is sampled.
(2) U for obtaining measurementdc1、Udc2Addition obtains DC voltage Udc, by UdcWith given reference value UdcrefIt carries out
Compare, obtain its error, using this error as the input value of outer voltage pi regulator, the output valve of outer voltage pi regulator
Given value as current inner loop d shaft current.Sample obtained power network current ia、ib、icThrough the transformed d shaft current of dq and its
Error adds voltage feed-forward control e after decouplingd, finally obtain the d axis component U of reference voltage vectord *.Same q axis class
Seemingly, in order to realize unity power factor, therefore q axis is 0 to constant current.
(3) the reference voltage vector U that will be obtainedq *、Ud *By the derotation of two-phase rotating coordinate system to two-phase stationary coordinate system
Turn coordinate transform to get u is arrivedrα, urβ, the SVPWM modulation of three level is carried out immediately, so that driving signal is generated, control switch pipe
Movement.
(4) U for obtaining measurementdc1、Udc2Subtract each other to obtain the potential difference △ U of upper and lower capacitordc, pass through a simple PI ring
Section control △ Udc, to obtain the value of midpoint potential pondage factor f, the action time for distributing positive and negative small redundant vectors is calculated, it is real
The charge and discharge time to upper and lower capacitor is distributed in matter, to solve the problems, such as that three-level rectifier midpoint potential is unbalanced.
Fig. 9 is the input side rectifier voltage and current waveform, as can be seen from Figure 9 the overall sineization degree of electric current compared with
It is good, and voltage and current realizes same-phase, realizes unity power factor.
Figure 11 is rectifier main switch Sc2U in commutation courseCEAnd UGEWaveform diagram after amplification, as can be seen from Figure 11
In Sc2Before conducting, the voltage between collector and emitter has been reduced to zero, and Sofe Switch is achieved.
Claims (3)
1. the novel unidirectional three-phase tri-level rectifier based on soft switch technique, including commutating circuit, resonance circuit, buffer back
Road, sample circuit, zero cross detection circuit, DSP control module, PWM drive circuit；It is characterized by:
The commutating circuit is made of 3 rectifying bridge arms, and each rectifying bridge arm is opened with power respectively by 2 power switch tubes, 2
Close the clamp diode and 2 fast recovery diode compositions that pipe is in parallel；
Rectifying bridge arm 1:Sa1Collector and its anti-paralleled diode cathode, fast recovery diode Da1Anode and buffering capacitor one end
It is connected；Sa2Collector and its anti-paralleled diode cathode, fast recovery diode Da1Anode and buffering capacitor one end are connected；Sa1
Emitter and its anti-paralleled diode anode, fast recovery diode Da2Cathode and buffering capacitor one end are connected；Sa2Emitter with
Its anti-paralleled diode anode, buffering capacitor one end and resonant inductance LrOne end is connected；
Rectifying bridge arm 2:Sb1Collector and its anti-paralleled diode cathode, fast recovery diode Db1Anode and buffering capacitor one end
It is connected；Sb2Collector and its anti-paralleled diode cathode, fast recovery diode Db1Anode and buffering capacitor one end are connected；Sb1
Emitter and its anti-paralleled diode anode, fast recovery diode Db2Cathode and buffering capacitor one end are connected；Sb2Emitter with
Its anti-paralleled diode anode, buffering capacitor one end and resonant inductance LrOne end is connected；
Rectifying bridge arm 3:Sc1Collector and its anti-paralleled diode cathode, fast recovery diode Dc1Anode and buffering capacitor one end
It is connected；Sc2Collector and its anti-paralleled diode cathode, fast recovery diode Db1Anode and buffering capacitor one end are connected；Sc1
Emitter and its anti-paralleled diode anode, fast recovery diode Db2Cathode and buffering capacitor one end are connected；Sc2Emitter with
Its anti-paralleled diode anode, buffering capacitor one end and resonant inductance LrOne end is connected；
The resonance circuit is by resonant inductance Lr, auxiliary switch S3, shunt capacitance C3And clamp capacitor CcComposition；S3Collector with it is humorous
Shake inductance LrOne end, anti-parallel diodes anode and shunt capacitance C3One end is connected；S3Emitter and anti-parallel diodes yin
Pole, shunt capacitance C3The other end and clamp capacitor CcOne end is connected；Capacitor CcThe other end and resonant inductance LrThe other end and middle site
N is connected；
The buffer loop capacitor in parallel by 6 power devices and therewith forms；
The sample circuit includes Hall voltage current sensor, for realizing DC side and the detection for exchanging side voltage, electric current
Sampling；
The zero cross detection circuit, for detecting the voltage zero-crossing point of power grid moment, using DSP control module to the mistake of network voltage
Zero point is captured, and realizes the locking phase of mains frequency；
The DSP control module, for acquiring data, realization control strategy, controlling main circuit switch device；
The PWM drive circuit, for driving the unidirectional three-phase tri-level rectifier switch pipe.
2. the novel unidirectional three-phase tri-level rectifier based on soft switch technique according to claim 1, it is characterised in that:
There are three types of rectification states for the novel unidirectional three-phase tri-level rectifier:
State 1 is by switch SX1With diode DX1Conduction obtain；
State 2 is as switch SX1And SX2Acquisition when simultaneously turning on；
State 3 is by switch SX2With diode DX2Conduction obtain；
According to position in circuit, 6 main switches in circuit can be divided into 3 pairs: Sa、Sb、Sc；Each bridge arm has 3
Effective switch state (1,0, -1), and meet:
Neutral point n is enabled to keep dynamic electric voltage balance, andUanThere are 3 kinds of level respectivelyUabHave
Five kinds of level27 kinds of working conditions are shared by the rectifier known to formula (1-1), with (011),
(010), the realization of Sofe Switch is illustrated for (110) three kinds of operating modes
One (t of stage0-t1): the corresponding work vector of the stage rectifier is (011), main switch Sa1、Sa2、Sb1、Sc1And auxiliary is opened
Close S3Conducting, electric current iaThrough main switch Sa1、Sa2Site n in arrival, electric current ibFlow through main switch Sb1And diode Db1After reach n
Point, electric current icThrough main switch Sc1And diode Dc1Reach n point；At this time
Two (t of stage1-t2): t1Moment, auxiliary switch S3Shutdown, resonant inductance LrWith main switch Sc2Shunt capacitance there are also assist
Switch S3Shunt capacitance C3Carry out resonance, LrTo main switch Sc2Shunt capacitance discharge, to C3It charges；To t2When
It carves, main switch Sc2The voltage at shunt capacitance both ends is reduced to zero, and resonance stops, and opens S at this timec2, then switch Sc2It is in no-voltage item
It is opened under part；
Three (t of stage2-t3): the corresponding work vector of the stage rectifier is (010), main switch Sa1、Sa2、Sb1、Sc1And Sc2It leads
It is logical, electric current iaThrough main switch Sa1、Sa2Site n in arrival, electric current ibFlow through main switch Sb1And diode Db1N point, electricity are reached afterwards
Flow icThrough main switch Sc1、Sc2Site n in arrival；At this timeResonant inductance LrWith main switch Sb2And
Join capacitor and capacitor C3Carry out resonance, LrTo Sb2Shunt capacitance charges, to C3It discharges；To t3Moment C3Both ends
Voltage is reduced to zero, and resonance stops, and opens S at this time3, then S3It is open-minded under zero voltage condition；
Four (t of stage3-t4): t3From moment, main switch Sa1、Sa2、Sb1、Sc1、Sc2And auxiliary switch S3Conducting, by resonant inductance Lr、
Auxiliary switch S3With clamping capacitance CcL in the resonant tank of compositionrTo CcCharging；
Five (t of stage4-t5): arrive t4Moment, main switch Sa2Shutdown；The corresponding work vector of rectifier is (110), main switch at this time
Sa1、Sb1、Sc1、Sc2And S is connected in auxiliary switch3；Electric current iaFlow through main switch Sa1And diode Da1Site n in reaching afterwards；Electric current ib
Flow through main switch Sb1And diode Db1N point is reached afterwards；Electric current icThrough main switch Sc1、Sc2N point is reached afterwards；At this time
3. the novel unidirectional three-phase tri-level rectifier based on soft switch technique according to claim 1, it is characterised in that:
The novel unidirectional three-phase tri-level rectifier, using double circle controling mode, current inner loop and outer voltage are all made of PI
The control method combined with SVPWM is controlled, specific control process is as follows:
(1): by sample circuit to network voltage Ua(t)、Ub(t)、Uc(t), ac-side current ia(t)、ib(t)、ic(t) and
The upper and lower capacitance voltage U of DC sidedc1、Udc2It is sampled；
(2): the U that measurement is obtaineddc1、Udc2Addition obtains DC voltage Udc, by UdcWith given reference value UdcrefCompared
Compared with obtaining its error, using this error as the input value of outer voltage pi regulator, the output valve of outer voltage pi regulator is made
For the given value of current inner loop d shaft current；Sample obtained power network current ia、ib、icIt is missed through the transformed d shaft current of dq with it
Difference adds voltage feed-forward control e after decouplingd, finally obtain the d axis component U of reference voltage vectord *；Same q axis is similar,
In order to realize unity power factor, therefore q axis is 0 to constant current；
(3): the reference voltage vector U that will be obtainedq *、Ud *Reverse rotation by two-phase rotating coordinate system to two-phase stationary coordinate system is sat
Mark converts to arrive urα, urβ, the SVPWM modulation of three level is carried out immediately, to generate driving signal, control switch pipe is dynamic
Make；
(4): the U that measurement is obtaineddc1、Udc2Subtract each other to obtain the potential difference △ U of upper and lower capacitordc, pass through a simple PI link
Control △ Udc, to obtain the value of midpoint potential pondage factor f, calculate the action time for distributing positive and negative small redundant vectors, essence
The upper charge and discharge time distributed to upper and lower capacitor, to solve the problems, such as that three-level rectifier midpoint potential is unbalanced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811482810.XA CN109639160B (en) | 2018-12-05 | 2018-12-05 | Novel unidirectional three-phase three-level rectifier based on soft switching technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811482810.XA CN109639160B (en) | 2018-12-05 | 2018-12-05 | Novel unidirectional three-phase three-level rectifier based on soft switching technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109639160A true CN109639160A (en) | 2019-04-16 |
| CN109639160B CN109639160B (en) | 2021-09-07 |
Family
ID=66071355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811482810.XA Active CN109639160B (en) | 2018-12-05 | 2018-12-05 | Novel unidirectional three-phase three-level rectifier based on soft switching technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109639160B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138243A (en) * | 2019-05-30 | 2019-08-16 | 中南民族大学 | Rectified three-phase circuit and its control method suitable for unbalanced power grid |
| CN113206600A (en) * | 2021-04-12 | 2021-08-03 | 三峡大学 | Direct current charger based on single-phase three-level pseudo-totem pole |
| CN113258797A (en) * | 2021-04-21 | 2021-08-13 | 三峡大学 | Back-to-back type three-level rectifier of heterogeneous switching tube bridge arm |
| CN113271023A (en) * | 2021-04-21 | 2021-08-17 | 三峡大学 | Back-to-back type three-level rectifier of heterogeneous hybrid bridge arm |
| CN116742986A (en) * | 2023-07-18 | 2023-09-12 | 西安图为电气技术有限公司 | Voltage conversion circuit, power supply device, voltage conversion method, device and equipment |
| CN116846234A (en) * | 2023-08-31 | 2023-10-03 | 深圳市恒运昌真空技术有限公司 | Two-stage converter powered by radio frequency power supply and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5038267A (en) * | 1990-05-03 | 1991-08-06 | General Electric Company | Soft-switching power converter for operation in discrete pulse modulation and pulse width modulation modes |
| US9325247B1 (en) * | 2015-10-02 | 2016-04-26 | Vlt, Inc. | Clamped capacitor resonant power converter |
| CN107332244A (en) * | 2017-08-25 | 2017-11-07 | 上海电力学院 | The level SAPF of three-phase four-wire system NPC types three nonlinear control method |
| CN107342698A (en) * | 2017-08-24 | 2017-11-10 | 浙江大学 | A kind of the three-phase and four-line ZVT rectifier circuit and its modulator approach of band balance bridge arm |
| CN107968580A (en) * | 2017-12-25 | 2018-04-27 | 三峡大学 | A kind of unidirectional mixed type three-phase tri-level rectifier |
| CN108418415A (en) * | 2018-03-08 | 2018-08-17 | 浙江大学 | A kind of three-phase four-wire system zero voltage switch back-to-back converter circuit and its modulator approach |
-
2018
- 2018-12-05 CN CN201811482810.XA patent/CN109639160B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5038267A (en) * | 1990-05-03 | 1991-08-06 | General Electric Company | Soft-switching power converter for operation in discrete pulse modulation and pulse width modulation modes |
| US9325247B1 (en) * | 2015-10-02 | 2016-04-26 | Vlt, Inc. | Clamped capacitor resonant power converter |
| CN107342698A (en) * | 2017-08-24 | 2017-11-10 | 浙江大学 | A kind of the three-phase and four-line ZVT rectifier circuit and its modulator approach of band balance bridge arm |
| CN107332244A (en) * | 2017-08-25 | 2017-11-07 | 上海电力学院 | The level SAPF of three-phase four-wire system NPC types three nonlinear control method |
| CN107968580A (en) * | 2017-12-25 | 2018-04-27 | 三峡大学 | A kind of unidirectional mixed type three-phase tri-level rectifier |
| CN108418415A (en) * | 2018-03-08 | 2018-08-17 | 浙江大学 | A kind of three-phase four-wire system zero voltage switch back-to-back converter circuit and its modulator approach |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138243A (en) * | 2019-05-30 | 2019-08-16 | 中南民族大学 | Rectified three-phase circuit and its control method suitable for unbalanced power grid |
| CN110138243B (en) * | 2019-05-30 | 2020-06-09 | 中南民族大学 | Three-phase rectification circuit suitable for unbalanced power grid and control method thereof |
| CN113206600A (en) * | 2021-04-12 | 2021-08-03 | 三峡大学 | Direct current charger based on single-phase three-level pseudo-totem pole |
| CN113206600B (en) * | 2021-04-12 | 2023-12-19 | 三峡大学 | Single-phase three-level pseudo totem pole type direct current charger |
| CN113258797A (en) * | 2021-04-21 | 2021-08-13 | 三峡大学 | Back-to-back type three-level rectifier of heterogeneous switching tube bridge arm |
| CN113271023A (en) * | 2021-04-21 | 2021-08-17 | 三峡大学 | Back-to-back type three-level rectifier of heterogeneous hybrid bridge arm |
| CN113258797B (en) * | 2021-04-21 | 2022-06-14 | 三峡大学 | Back-to-back type three-level rectifier of heterogeneous switching tube bridge arm |
| CN113271023B (en) * | 2021-04-21 | 2022-06-14 | 三峡大学 | Back-to-back type three-level rectifier of heterogeneous hybrid bridge arm |
| CN116742986A (en) * | 2023-07-18 | 2023-09-12 | 西安图为电气技术有限公司 | Voltage conversion circuit, power supply device, voltage conversion method, device and equipment |
| CN116846234A (en) * | 2023-08-31 | 2023-10-03 | 深圳市恒运昌真空技术有限公司 | Two-stage converter powered by radio frequency power supply and control method thereof |
| CN116846234B (en) * | 2023-08-31 | 2023-11-10 | 深圳市恒运昌真空技术有限公司 | Control method of secondary converter powered by radio frequency power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109639160B (en) | 2021-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109639160A (en) | Novel unidirectional three-phase tri-level rectifier based on soft switch technique | |
| CN105610336B (en) | MMC type multiport electric power electric transformer based on double capacitance modules | |
| WO2017128499A1 (en) | Four-port power electronic transformer based on hybrid modular multilevel converter | |
| CN101316074B (en) | Back-to-back three-power level midpoint clamping current transformer of wind power generation system | |
| CN107204626A (en) | A kind of LCC MMC interlock hybrid bypolar DC transmission system | |
| CN107070287A (en) | Electric energy router and electric energy router submodule | |
| CN106208737B (en) | Model prediction current control method based on third-harmonic zero-sequence voltage matrix converter | |
| CN110943469B (en) | Single-stage energy storage converter and control method thereof | |
| CN112910244A (en) | Single-phase three-level power factor correction circuit of hybrid bridge arm | |
| CN107888096A (en) | A kind of bridge arm tri-level mixed-rectification device of three-phase two | |
| Samanbakhsh et al. | A new asymmetric cascaded multilevel converter topology with reduced voltage stress and number of switches | |
| CN115296554A (en) | High-modulation-ratio hybrid MMC and control method thereof | |
| CN109347335B (en) | Modular multilevel converter bridge arm topology suitable for current source control | |
| CN104796019B (en) | A kind of Z sources three-level PWM rectifier and its control method | |
| CN109713929A (en) | A kind of three switch of three-phase, two level rectifier based on Zero-voltage soft switch | |
| CN106787892B (en) | A kind of method for generation of single-phase three-level inverter circuit and its pwm signal | |
| CN109510487A (en) | The two-way AC/DC converter of current mode single-stage isolated three-phase and its modulation strategy | |
| CN109450267A (en) | A kind of boost control method based on the active third-harmonic zero-sequence voltage converter of mixing | |
| CN204481711U (en) | A kind of Z source three-level PWM rectifier | |
| CN111130364A (en) | Three-phase rectifier | |
| CN109038677A (en) | A kind of efficient six switch singles grid-connected converter | |
| CN113437855B (en) | Generalized Clarke coordinate transformation and three-phase control circuit | |
| CN109921663A (en) | A kind of two bridge arm tri-level rectifier of three-phase based on soft switch technique | |
| CN111900886B (en) | Flexible direct current transmission converter | |
| CN110867864A (en) | Off-grid operation control method for active third harmonic injection matrix converter |
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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211117 Address after: 430014 c-01-1, daijiashan science and technology entrepreneurship City, No. 888, Hanhuang Road, Jiang'an District, Wuhan City, Hubei Province Patentee after: Wuhan Xinyuan Automatic Control Engineering Co.,Ltd. Address before: 443002 No. 8, University Road, Xiling District, Yichang, Hubei Patentee before: CHINA THREE GORGES University |
|
| TR01 | Transfer of patent right |