CN107465353A - A kind of rectifier and its control method - Google Patents
A kind of rectifier and its control method Download PDFInfo
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- CN107465353A CN107465353A CN201710630160.8A CN201710630160A CN107465353A CN 107465353 A CN107465353 A CN 107465353A CN 201710630160 A CN201710630160 A CN 201710630160A CN 107465353 A CN107465353 A CN 107465353A
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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
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
-
- 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
-
- 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
- H02M1/4216—Arrangements for improving power factor of AC input operating from a three-phase input voltage
-
- 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
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost 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
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention discloses a kind of rectifier and its control method, belongs to High Power Factor commutation technique field.The rectifier includes：Three-phase voltage source circuit（1）, three-phase uncontrollable rectifier circuit（2）, two symmetrical boost circuits（3）, third harmonic voltage generative circuit（4）With H bridge boost pfc circuits（5）.Double half-wave boost PFC are in a cycle respectively in 30 ° 150 °, the steamed bun ripple phase current waveform of 210 ° of 330 ° of generations, two opposite directions, when there is vacancy in certain phase current, waveform equalization circuit can switch in corresponding phase, compensate the phase current waveform that corresponding phase lacks, input current is set to be changed into standard sine wave, converter is operated in unit power factor rectification state.The present invention can be used for having PFC（PFC）The three-phase AC/DC translation circuits of function, the topological structure is simple, easy to control, it is easy to accomplish.
Description
Technical field
The present invention relates to a kind of rectifier and its control method, belongs to High Power Factor commutation technique field.
Background technology
Power factor correction technology (Power Factor Correction Technique) is power electronics educational circles and work
One basic technology in industry field, for suppressing harmonic pollution, power network and each electrical equipment are made with reducing high order current harmonics
Into harm.With the increase of electrical equipment, high efficiency, high power density and High Power Factor are it is also proposed to electrical energy transformer
Requirement, therefore, various new PFC transformation topologies also arise at the historic moment.
Power factor correction technology is divided into two kinds of PPFC and APFC.Passive Power because
Number correction uses passive device, such as LC filtering, although circuit structure is simple, efficiency high, power factor is by inductance value
Influence, 0.95 only up to be reached, and output voltage is uncontrollable, so not being used in most cases.Three-phase PFC can be divided into
Two classes, one kind are single switch structures, and one kind is Multi- Switch structure.Triphase single-switch Boost type pfc circuit, in order to realize three-phase
Between solution lotus root, three inductance are placed on AC, and work in discontinuous conduct mode, are characterized in that current control is simple, still
The input of the circuit, output current ripple are larger, require higher to filtered circuit, output voltage is too high, and this gives the choosing of power tube
Take and bring certain difficulty, the circuit is generally used for power output less than 10kw and to electric current THD（(total
Harmonic distortion, total harmonic distortion)）It is required that not strict occasion.Although three-phase Multi- Switch can be with higher precision
Control input electric current, excellent performance is obtained, but required switching tube quantity is more, driving and control strategy are complicated, and cost is higher,
It is suitable for the occasion of relatively high power.statcom（Static synchronous compensating device）And APF（Active Power Filter-APF）What is absorbed is flat
Equal power is zero.
The content of the invention
In view of the above-mentioned problems, the present invention proposes a kind of rectifier and its control method, available for power factor school
Just（PFC）The three-phase AC/DC translation circuits of function, the topological structure is simple, easy to control, it is easy to accomplish.
The present invention adopts the following technical scheme that to solve its technical problem：
A kind of rectifier, including：Three-phase voltage source circuit（1）, three-phase uncontrollable rectifier circuit（2）, two symmetrical boost circuits
（3）, third harmonic voltage generative circuit（4）With H bridge boost pfc circuits（5）, wherein, three-phase voltage source circuit（1）By ua,
Ub, uc tri- is in 120 ° of three sinusoidal voltage sources composition, and ua, ub, uc three-phase voltage source one end, which connect together, connects center line, separately
One end respectively with three-phase uncontrollable rectifier circuit（2）It is connected；
The three-phase uncontrollable rectifier circuit（2）Including the first diode D1, the second diode D2, the 3rd diode D3, the four or two
Pole pipe D4, the 5th diode D5 and the 6th diode D6, wherein, the first diode D1 anode and the second diode D2 negative electrode
It is connected and forms first series circuit, the 3rd diode D3 anode and the connected composition Article 2 string of the 4th diode D4 negative electrode
Join circuit, the 5th diode D5 anode and the 6th diode D6 negative electrode, which are connected, forms Article 3 series circuit, the above three
Series circuit negative electrode is mutually common with negative electrode, and anode mutually forms three-phase uncontrollable rectifier circuit altogether with anode（2）；Wherein, ua voltage sources
The other end is connected with the midpoint of first series circuit, and the other end of ub voltage sources is connected with the midpoint of Article 2 series circuit,
The other end of uc voltage sources is connected with the midpoint of Article 3 series circuit, and the center line of ua, ub, uc three-phase and two are symmetrical
Boost circuits（3）It is connected；
Described two symmetrical boost circuits（3）Including two input inductance, two power switch pipes, two diodes and two
Individual electric capacity, wherein, the first boost circuits include the first input inductance L1, the first power switch pipe Q1, the 7th diode D7
With the first output capacitance C1, wherein the first input inductance L1 one end is connected with the 5th diode D5 negative electrode, the first input is electric
The anode for feeling the L1 other end with the first power switch pipe Q1 drain electrode and the 7th diode D7 is connected, the 7th diode D7 negative electrodes
Connect the negative pole and three-phase electricity of the first output capacitance C1 positive pole, the first power switch pipe Q1 source electrode and the first output capacitance C1
The center line of potential source is connected；The 2nd boost circuits include the second input inductance L2, the second power switch pipe Q2, the eight or two pole
Pipe D8 and the second output capacitance C2, wherein the second input inductance L2 one end is connected with the 6th diode D6 anode, the other end
It is connected with the second power switch pipe Q2 source electrodes and the 8th diode D8 negative electrodes, the second power switch pipe Q2 drain electrode and the second output
Electric capacity C2 positive pole is connected with the center line of three-phase voltage source, and the 8th diode D8 anodes are connected with the second output capacitance C2 negative poles；
The third harmonic voltage generative circuit（4）Including the 3rd power switch pipe Q3, the 4th power switch pipe Q4 and the 5th work(
Rate switching tube Q5, wherein the 3rd power switch pipe Q3 power leads end one terminates ua, the 4th power switch pipe Q4 power leads end
One termination ub, the 5th power switch pipe Q5 power leads end one termination uc, the 3rd power switch pipe Q3 power leads end it is another
The other end at end, the other end at the 4th power switch pipe Q4 power leads end and the 5th power switch pipe Q5 power leads end is connected
The 9th diode D9 anodes are connected afterwards；
The H bridges boostPFC rectifications（5）Including the 9th diode D9, the tenth diode D10, the 11st diode D11, the tenth
Two diode D12, the 3rd inductance L3, the 6th power switch pipe Q6, the 13rd diode D13 and the 3rd electric capacity C3, wherein the 9th
Diode D9 anodes are connected with the tenth diode D10 negative electrodes, the 11st diode D11 anodes and the 12nd diode D12 negative electrodes
It is connected, the 3rd inductance L3 one end, the 3rd inductance L3 is connected after the 9th diode D9, the connection of the 11st diode D11 common cathodes
The other end connects the 13rd diode D13 anode and the 6th power switch pipe Q6 drains, and the 13rd diode D13 negative electrode connects
The 3rd electric capacity C3 positive pole is connect, the 6th power switch is connected after the 12nd diode D12, the connection of the tenth diode D10 common-anodes
The negative pole of pipe Q6 source electrode and the 3rd electric capacity C3, the 12nd diode D12 negative electrodes and the second power switch pipe Q2 drain electrodes are connected.
The 3rd power switch pipe Q3, the 4th power switch pipe Q4With the 5th power switch pipe Q5For two-way gate-controlled switch.
The first power switch pipe Q1, the second power switch pipe Q2With the 6th power switch pipe Q6It is MOSFET or IGBT.
A kind of control method of rectifier, comprises the following steps：
（1）First output capacitance C1 value of feedback and set-point relatively and through PI regulations determines the width of the first input inductance L1 electric currents
Value, this amplitude are multiplied by the sampling of the 5th diode D5 negative electrodes voltage-to-ground and are worth to the first input inductance L1 current inner loops and give, the
One input inductance L1 current inner loops are given and the first input inductance L1 current feedback values relatively and after PI is adjusted control the first work(
Rate switching tube Q1, that is, control the first inductance L1 diode D5 negative electrode voltage-to-ground envelopes of current tracking the 5th；
（2）The given amplitude using the first input inductance L1 electric currents of amplitude of second input inductance L2 electric currents is given, and amplitude is multiplied by
The sampling of 6th diode D6 anodes voltage-to-ground is worth to the second input inductance L2 current inner loops and given, the second input inductance L2 electricity
Stream inner ring is given and the second input inductance L2 current feedback values relatively and after PI is adjusted control the second power switch pipe Q2, that is, controls
The input inductance of the system second L2 diode D6 anode voltage-to-ground envelopes of current tracking the 6th, now, three-phase phase current removed
- 30 ° to 30 ° of zero point, 150 ° to 210 ° outer, all keeps phase consistent with phase voltage；
（3）When a certain phase voltage is in the centre of three-phase voltage, mutually no electric current flows through three-phase uncontrollable rectifier diode D1-
D6, now, the two-way switch conducting of the corresponding phase of waveform equalization circuit, compensate the scarce part of corresponding phase current waveform institute；3rd input
Inductance L3 given value of current amplitude is the half of phase current magnitude, and it is multiplied by diode H-bridge D9-D12 commutating voltage sampled value conducts
3rd input inductance L3 electric current loops give, and the 3rd input inductance L3 electric current loops are given and the 3rd input inductance L3 current feedback values are done
The 6th power switch pipe Q6 is controlled after difference and PI regulations, that is, controls the 3rd input inductance L3 current tracking diode H-bridge D9-
D12 commutating voltage envelope, -30 ° to 30 °, the part of centre 2/4 of 150 ° to 210 ° i.e. phase current waveforms is compensated, and is mended
The part that neat waveform lacks, phase current is complete sine wave, and with input voltage same-phase, power factor 1.
Beneficial effects of the present invention are as follows：
（1）Power factor is higher than three-phase LC filtering passive power factor correcting circuits, improves 5%, reaches unity power factor.
（2）Circuit is operated in continuous mode, and current ripples are lower than triphase single-switch power factor correcting circuit.
（3）With three-phase PWM（Pulse width modulation）Rectification is compared with Vienna rectifications, can realize that unity power factor is defeated
Enter the control of sine-wave current, but the circuit elementary cell proposed is boost circuits, control is simple, work it is more reliable with it is steady
It is fixed.
（4）Compared with three monophasic combination formula three-phase pfc circuits, it is relatively low to flow through total virtual value of switching tube, capacitance voltage two
Frequency multiplication pulsation is smaller.
（5）The topological circuit is simple in construction, and PFC is realized using Average Current Control strategy.
Brief description of the drawings
Fig. 1 is the topology of the present invention, wherein：1st, three-phase voltage source；2nd, three-phase uncontrollable rectifier circuit；3rd, two it is symmetrical
Boost circuits；4th, third harmonic voltage generative circuit；5th, H bridges boostPFC circuits, wherein：u a -u c --- three-phase voltage source；D 1 -D 6 --- three-phase uncontrollable rectifier diode；L 1 -L 3 --- boost boost inductances；Q 1 、Q 2、 Q 6 --- boost power switch pipes；Q 3 、Q 4、 Q 5 --- two-way controlled power switching tube；D 7 、D 8 、D 13 --- boost diodes；D 9 、D 10 、D 11 、D 12 --- the pole of rectification two
Pipe；C 1 - C 3 --- output filter capacitor； i a -i c --- phase current before compensation；i a2 -i c2 --- phase current after compensation；V 1 ——
Three phase rectifier common cathode-center line line voltage；V 2 --- three phase rectifier common-anode-center line line voltage；i L1 --- inductanceL 1 Input electricity
Stream；i L2 --- inductanceL 2 Input current；i L3 --- inductanceL 3 Input current.
Fig. 2 is the double half-wave boost PFC control loop block diagrams of three-phase, wherein：u 0 --- output voltage samples；u 0 * ——
Given for output voltage； i L1 --- inductanceL 1 Input current；i L2 --- inductanceL 2 Input current,u v --- outer shroud output valve,i L1 *--- inductanceL 1 Current instruction value, i L2 *--- inductanceL 2 Current instruction value,v 1 --- three phase rectifier common cathode-neutral voltage
Sampled value,v 2 --- three phase rectifier common-anode-neutral voltage sampled value.
Fig. 3 is the phase current waveform compensation circuit control loop block diagram of the present invention, wherein：u a -u c --- three-phase voltage source
Sampled voltage；u v --- inner ring current amplitude signal；u t --- triple-frequency harmonics extracts circuit output signal；i L3 --- inductanceL 3 It is defeated
Enter electric current, R1--- 20000 ohm of amplifying circuit resistance, R2--- 10000 ohm of amplifying circuit resistance.
Fig. 4（a）It is three-phase semiwave diode common cathode rectifier output voltage waveform, Fig. 4（b）It is that three-phase semiwave diode is total to
Negative electrode rectified output current waveform.
Fig. 5（a）It is a phase currents, Fig. 5 before current waveform does not compensate（b）It is b phase currents, Fig. 5 before current waveform does not compensate
（c）It is c phase currents before current waveform does not compensate.
Fig. 6（a）It is that A phases do not compensate current waveform, Fig. 6（b）It is the current waveform that A phases need to compensate, Fig. 6（c）It is that A phases are mended
Current waveform after repaying.
Fig. 7（a）Be current waveform compensation after a phase currents, Fig. 7（b）Be current waveform compensation after b phase currents, Fig. 7（c）It is
C phase currents after current waveform compensation.
A phase voltages and current waveform after Fig. 8 compensation（Amplitude is larger for voltage, and less is electric current）.
Fig. 9 is the part input voltages of Fig. 1 the 5th and current waveform（Amplitude is larger for voltage, and less is electric current）.
Embodiment
The invention is described in further details below in conjunction with the accompanying drawings.
The double half-wave boost PFC power factor corrections of three-phase of the present invention are opened using three phase half wave rectification with reference to two boost
Guan Guan, circuit work in inductor current continuous mode, and waveform equalization circuit is then rectified to the double half-wave boost PFC power factors of three-phase
2/4 part among positive circuit input current（- 30 ° to 30 °, 150 ° to 210 °）Compensate, it is complete to make phase input current
Sine wave, realize complete power factor correction purpose.
As shown in Fig. 2 output voltage sampled valueu 0 And set-pointu 0 * Adjusted after making the difference by PI, form inner ring current amplitude
Signalu v , it is multiplied by unit half wave rectified voltage signal and obtains the Setting signal of inner ringi L1 * / i L2 * , it is with inductance L1/ L2's
Current feedback values make the difference and after PI regulations, control the first power switch pipe and the second power switch pipe, that is, control inductance L1's
The envelope of the positive half cycle of current tracking three-phase input voltage, inductance L1 current waveform is input three-phase electricity positive pressure half cycle steamed bun ripple
Envelope, the envelope of control inductance L2 current tracking three-phase input voltage negative half period, inductance L2 current waveform is input
Three-phase voltage negative half period steamed bun wave envelope.
When a certain phase voltage is in the centre of three-phase voltage, mutually no electric current flows through three-phase uncontrollable rectifier two in Fig. 1
Pole pipe D1-D6, in a cycle, under three-phase input voltage symmetric case, when certain phase voltage is from -0.5Vp（Voltage peak）
Rise to 0.5Vp, or from 0.5Vp drop to -0.5Vp when, the two-way switch conducting of the corresponding phase of waveform equalization circuit, compensation is corresponding
The scarce part of phase current institute.Waveform equalization circuit three-phase selecting switch Q3-Q5 turn-on condition is：Whenu b <u a <u c Oru c <u a <u b ,A
Phase selecting switch Q3 is turned on.Whenu a <u b <u c Oru c <u b <u a , B phase selecting switch Q4 conductings.Whenu b <u c <u a Oru a <u c <u b , C
Phase selecting switch Q5 is turned on, whereinu a ForaPhase voltage,u b ForbPhase voltage,u c ForcPhase voltage.
The output voltage waveforms of waveform selection circuit (Fig. 1 the 4th part) are three-phase input phase voltage waveform at each
The waveform that phase phase voltage where moment voltage is in middle is formed（Similar to triangular wave, frequency is three times of input voltage）,
Third harmonic voltage is named as herein.Diode H-bridge boost PFC (Fig. 1 the 5th part) working method is control input
Current tracking input voltage, that is, control inductance L3 current tracking diode H-bridge（D9-D12）Commutating voltage, so control,
Diode H-bridge boostPFC（The parts of Fig. 1 the 5th）Input voltage is as input current waveform shape.
The half that the amplitude for controlling inductive current L3 is inductive current L1.
The explanation of waveform shape：Third harmonic voltage definition herein：
In Fig. 1, the output voltage of the 4th part and the current in middle wire before not compensating are this waveform, the 5th part two in control figure 1
Pole pipe H bridges boostPFC input current is this waveform, and amplitude is 0.5 times of inductance L1 electric currents.
Fig. 3 is diode H-bridge boost PFC（Fig. 1 Part V）Control block diagram.Controlled using single electric current ring, feedback
It is triple-frequency harmonics to measure as inductance L3 electric current, specified rateu t Absolute value.The amplitude and phase of triple-frequency harmonics can use as follows
Several schemes:1st, in the case of if center line, current in middle wire is sampled, as given (such a method needs after signed magnitude arithmetic(al)
Power supply belt center line), 2, the 4th part using triple-frequency harmonics generative circuit such as Fig. 3, given amplitude is the one of inductance L1 electric currents
Half.0 ° -30 °, 150 ° -210 °, 330 ° -360 ° of phase current waveform by after compensation, phase current is complete sine wave.
Waveform equalization circuit is to phase current（- 30 ° to 30 °, 150 ° to 210 °）That is mended the part of centre 2/4 of waveform
Repay, the part that polishing waveform lacks.So, phase current is complete sine wave, and is with input voltage same-phase, power factor
1。
Fig. 4（a）It is three-phase semiwave diode common cathode rectifier output voltage waveform, Fig. 4（b）It is that three-phase semiwave diode is total to
Negative electrode rectified output current waveform, it can be seen that its input terminal voltage waveform of inductive current waveform tracking.
Fig. 5（a）It is a phase currents, Fig. 5 before current waveform does not compensate（b）It is b phase currents, Fig. 5 before current waveform does not compensate
（c）It is c phase currents before current waveform does not compensate, it can be seen that in the case of uncompensated, -30 ° of phase current waveform arrives
30 °, 150 ° to 210 ° lack a part.
Fig. 6（a）It is that A phases do not compensate current waveform, Fig. 6（b）It is the current waveform that A phases need to compensate, Fig. 6（c）It is A
Current waveform after mutually compensating, it can be seen that the electric current for needing to compensate is part lacking in standard sine wave.
Fig. 7（a）Be current waveform compensation after a phase currents, Fig. 7（b）Be current waveform compensation after b phase currents, Fig. 7（c）
It is c phase currents after current waveform compensates, it can be seen that three-phase input current is standard sine wave ripple after overcompensation
Shape, and phase differs 120 °.
A phase voltages and current waveform after Fig. 8 compensation（Amplitude is larger for voltage, and less is electric current）, can be with from figure
Find out, input voltage and input current phase difference is zero.
Fig. 9 is the part input voltages of Fig. 1 the 5th and current waveform（Amplitude is larger for voltage, and less is electric current）, electricity
Floating voltage envelope is flowed, the size of current amplitude is 0.5 times of three-phase input current phase current magnitude.
Claims (4)
- A kind of 1. rectifier, it is characterised in that including：Three-phase voltage source circuit（1）, three-phase uncontrollable rectifier circuit（2）, two it is right The boost circuits of title（3）, third harmonic voltage generative circuit（4）With H bridge boost pfc circuits（5）, wherein, three-phase voltage source Circuit（1）Byu a 、u b 、u c Three are in 120 ° of three sinusoidal voltage sources composition,u a 、u b 、u c Three-phase voltage source one end is connected in one Rise and connect center line, the other end respectively with three-phase uncontrollable rectifier circuit（2）It is connected；The three-phase uncontrollable rectifier circuit（2）Including the first diode D1, the second diode D2, the 3rd diode D3, the four or two pole Pipe D4, the 5th diode D5With the 6th diode D6, wherein, the first diode D1Anode and the second diode D2Negative electrode be connected Form first series circuit, the 3rd diode D3Anode and the 4th diode D4Negative electrode be connected form Article 2 series electrical Road, the 5th diode D5Anode and the 6th diode D6Negative electrode be connected form Article 3 series circuit, three series electricals of the above Road negative electrode is mutually common with negative electrode, and anode mutually forms three-phase uncontrollable rectifier circuit altogether with anode（2）；Wherein,u a The other end of voltage source It is connected with the midpoint of first series circuit,u b The other end of voltage source is connected with the midpoint of Article 2 series circuit,u c Voltage source The other end be connected with the midpoint of Article 3 series circuit,u a 、u b 、u c The center line of three-phase and two symmetrical boost circuits（3） It is connected；Described two symmetrical boost circuits（3）Including two input inductance, two power switch pipes, two diodes and two Individual electric capacity, wherein, the first boost circuits include the first input inductance L1, the first power switch pipe Q1, the 7th diode D7 With the first output capacitance C1, wherein the first input inductance L1One end and the 5th diode D5Negative electrode be connected, first input inductance L1The other end and the first power switch pipe Q1Drain electrode and the 7th diode D7Anode be connected, the 7th diode D7Negative electrode connects First output capacitance C1Positive pole, the first power switch pipe Q1Source electrode and the first output capacitance C1Negative pole and three-phase voltage The center line in source is connected；The 2nd boost circuits include the second input inductance L2, the second power switch pipe Q2, the 8th diode D8 With the second output capacitance C2, wherein the second input inductance L2One end and the 6th diode D6Anode be connected, the other end and second Power switch pipe Q2Source electrode and the 8th diode D8Negative electrode is connected, the second power switch pipe Q2Drain electrode and the second output capacitance C2 Positive pole be connected with the center line of three-phase voltage source, the 8th diode D8Anode and the second output capacitance C2Negative pole connects；The third harmonic voltage generative circuit（4）Including the 3rd power switch pipe Q3, the 4th power switch pipe Q4With the 5th power Switching tube Q5, wherein the 3rd power switch pipe Q3Power lead end one terminatesu a , the 4th power switch pipe Q4Power lead end one end Connectu b , the 5th power switch pipe Q5Power lead end one terminatesu c , the 3rd power switch pipe Q3The other end at power lead end, Four power switch pipe Q4The other end at power lead end and the 5th power switch pipe Q5The other end at power lead end connects after being connected 9th diode D9Anode；The H bridges boostPFC rectifications（5）Including the 9th diode D9, the tenth diode D10, the 11st diode D11, the 12nd Diode D12, the 3rd inductance L3, the 6th power switch pipe Q6, the 13rd diode D13With the 3rd electric capacity C3, wherein the 9th 2 pole Pipe D9Anode and the tenth diode D10Negative electrode is connected, the 11st diode D11Anode and the 12nd diode D12Negative electrode is connected, the Nine diode D9, the 11st diode D11The 3rd inductance L is connected after common cathode connection3One end, the 3rd inductance L3The other end connects 13rd diode D13Anode and the 6th power switch pipe Q6Drain electrode, the 13rd diode D13Negative electrode connect the 3rd electric capacity C3 Positive pole, the 12nd diode D12, the tenth diode D10The 6th power switch pipe Q is connected after common-anode connection6Source electrode and Three electric capacity C3Negative pole, the 12nd diode D12Negative electrode and the second power switch pipe Q2Drain electrode is connected.
- A kind of 2. rectifier according to claim 1, it is characterised in that the 3rd power switch pipe Q3, the 4th power opens Close pipe Q4With the 5th power switch pipe Q5For two-way gate-controlled switch.
- A kind of 3. rectifier according to claim 1, it is characterised in that the first power switch pipe Q1, the second power opens Close pipe Q2With the 6th power switch pipe Q6It is MOSFET or IGBT.
- 4. the control method of a kind of rectifier according to claim 1, it is characterised in that comprise the following steps：（1）First output capacitance C1Value of feedback and set-point relatively and determine the first input inductance L through PI regulations1The width of electric current Value, this amplitude are multiplied by the 5th diode D5The sampling of negative electrode voltage-to-ground is worth to the first input inductance L1Current inner loop gives, and first Input inductance L1Current inner loop is given and first inputs inductance L1Current feedback values relatively and control the first power to open after PI is adjusted Close pipe Q1, that is, control the first inductance L1The diode D of current tracking the 5th5Negative electrode voltage-to-ground envelope；（2）Second input inductance L2The amplitude of electric current is given using the first input inductance L1The amplitude of electric current gives, and amplitude is multiplied by Six diode D6The sampling of anode voltage-to-ground is worth to the second input inductance L2Current inner loop gives, the second input inductance L2Electric current Inner ring is given and second inputs inductance L2Current feedback values relatively and after PI is adjusted control the second power switch pipe Q2, that is, control Second input inductance L2The diode D of current tracking the 6th6Anode voltage-to-ground envelope, now, three-phase phase current remove zero passage - 30 ° to 30 ° of point, 150 ° to 210 ° outer, all keeps phase consistent with phase voltage；（3）When a certain phase voltage is in the centre of three-phase voltage, mutually no electric current flows through three-phase uncontrollable rectifier diode D1- D6, now, the two-way switch conducting of the corresponding phase of waveform equalization circuit, compensate the scarce part of corresponding phase current waveform institute；3rd input Inductance L3Given value of current amplitude is the half of phase current magnitude, and it is multiplied by diode H-bridge D9-D12Commutating voltage sampled value is as Three input inductance L3Electric current loop gives, the 3rd input inductance L3Electric current loop is given and the 3rd inputs inductance L3Current feedback values make the difference And control the 6th power switch pipe Q after PI regulations6, that is, control the 3rd current tracking diode H-bridge D for inputting inductance L39-D12's Commutating voltage envelope, -30 ° to 30 °, the part of centre 2/4 of 150 ° to 210 ° i.e. phase current waveforms is compensated, polishing ripple The part that shape lacks, phase current are complete sine wave, and with input voltage same-phase, power factor 1.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113131764A (en) * | 2021-04-19 | 2021-07-16 | 湘潭大学 | Terminal sliding mode back-thrust current control method of 12-pulse hybrid Vienna rectifier |
| CN114402536A (en) * | 2019-07-15 | 2022-04-26 | 原子能和替代能源委员会 | Ultra-low-consumption reconfigurable waveform compact UWB transmitter |
| WO2022192167A1 (en) * | 2021-03-10 | 2022-09-15 | Enphase Energy, Inc. | Partial-resonant converters for pv applications |
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| CN114402536B (en) * | 2019-07-15 | 2023-09-05 | 原子能和替代能源委员会 | Ultra low consumption reconfigurable waveform compact UWB transmitter |
| WO2022192167A1 (en) * | 2021-03-10 | 2022-09-15 | Enphase Energy, Inc. | Partial-resonant converters for pv applications |
| CN113131764A (en) * | 2021-04-19 | 2021-07-16 | 湘潭大学 | Terminal sliding mode back-thrust current control method of 12-pulse hybrid Vienna rectifier |
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| CN107465353B (en) | 2020-07-28 |
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