CN106130379A - Combination type high-current rectifier and active harmonics suppressing method thereof - Google Patents
Combination type high-current rectifier and active harmonics suppressing method thereof Download PDFInfo
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- CN106130379A CN106130379A CN201610261044.9A CN201610261044A CN106130379A CN 106130379 A CN106130379 A CN 106130379A CN 201610261044 A CN201610261044 A CN 201610261044A CN 106130379 A CN106130379 A CN 106130379A
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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
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
Abstract
The present invention proposes a kind of combination type high-current rectifier and active harmonics suppressing method thereof, and it aims to provide a kind of commutator being applied to big current applications, and solves the problem that this commutator Harmonics of Input content is high, current harmonics resultant distortion rate is big.This combination type high-current rectifier is formed by the double reverse-stars type rectifier combination of two groups of band paralleing reactors, these two groups of double reverse-stars type commutators are connected in parallel by paralleing reactor, often group double reverse-stars type commutator is made up of two groups of three-plase half wave rectifier circuits, and three-plase half wave rectifier circuit uses diode as rectifying device；For suppressing the Harmonics of Input of combination type high-current rectifier, single-phase full bridge inverter circuit is connected with the secondary of paralleing reactor, by controlling the output electric current of single-phase full bridge inverter circuit, the output electric current of three-plase half wave rectifier circuit is modulated, makes the input current of combination type high-current rectifier be approximately sinusoidal wave.The present invention is applicable to big electric current rectification occasion.
Description
Technical field
The present invention relates to a kind of combination type high-current rectifier and active harmonics suppressing method thereof, belong to electric and electronic technical field.
Background technology
In the application of the aspects such as electrolysis, plating, electrolytic degreasing, submerged arc welding, carbon arc air gouging, need to use the DC source of low-voltage and high-current.Double reverse-stars type commutator with paralleing reactor is the DC source that low-voltage and high-current occasion is conventional.This commutator uses paralleing reactor two groups of three-plase half wave rectifier circuits in parallel, puies forward the ability of High Output Current.Under big inductive load, the input current of this commutator is 6 pulse waves, containing a large amount of harmonic waves in input current.When input current bigger grade, harmonic current can cause the Severe distortion of line voltage, and then causes a series of power quality problem.Therefore, the harmonic wave effectively suppressing this commutator to produce, total harmonic distortion factor is controlled in allowed band, improve the AC quality of power supply, become the important topic of Power Electronic Technique research.
Harmonics of Input for the double reverse-stars type commutator of suppression band paralleing reactor, and improve the ability of rectifier current output, the present invention proposes a kind of combination type high-current rectifier, and uses active harmonics suppressing method to suppress Harmonics of Input at DC side.This combination type high-current rectifier uses the double reverse-stars type commutator of two groups of band paralleing reactors as main circuit, these two groups of double reverse-stars type commutators use the phase-shifting transformer of different structure, one group of phase-shifting transformer is /Y/Y connection, another group connects for Y/Y/Y, the difference of phase-shifting transformer bind mode, can make this combination type high-current rectifier form 12 pulse wave rectifiers.For the harmonic wave in suppression combination type high-current rectifier input current, use the paralleing reactor of band secondary, by to the secondary injecting compensating electric current of paralleing reactor, rectifier bridge output electric current is compensated, reaches to suppress commutator Harmonics of Input, improve the purpose of the commutation system AC quality of power supply.
Summary of the invention
In low-voltage and high-current occasion, for improving the harmonic inhibition capability of commutator, the invention provides a kind of combination type high-current rectifier and active harmonics suppressing method thereof.This combination type high-current rectifier uses the double reverse-stars type commutator of two groups of band paralleing reactors as main circuit, these two groups of double reverse-stars type commutators use the phase-shifting transformer of different structure, one group of phase-shifting transformer is /Y/Y connection, another group connects for Y/Y/Y, the difference of phase-shifting transformer bind mode, can make this combination type high-current rectifier form 12 pulse wave rectifiers.For the harmonic wave in suppression combination type high-current rectifier input current, use the paralleing reactor of band secondary, by controlling the turn-on and turn-off of IGBT in single-phase full bridge inverter circuit, to paralleing reactor secondary injection current, carry out current compensation so that the electric current flowing through paralleing reactor meets the purpose of suppression AC Harmonics of Input.
For achieving the above object, the technical solution used in the present invention is: a kind of combination type high-current rectifier and active harmonics suppressing method thereof, including: the double reverse-stars type transformator of/Y/Y connection, the double reverse-stars type transformator of Y/Y/Y connection, first group of three-plase half wave rectifier circuit, second group of three-plase half wave rectifier circuit, the 3rd group of three-plase half wave rectifier circuit, the 4th group of three-plase half wave rectifier circuit, the paralleing reactor 1 of band secondary, paralleing reactor 2, paralleing reactor 3, single-phase full bridge inverter circuit, control circuit and load；The double reverse-stars type transformator of/Y/Y connection is as phase-shifting transformer, and its primary side winding uses triangle junction, and secondary is two groups of separate Y shapes connection windings, and two groups of vice-side winding output voltage phase 180 °；The primary side winding of the double reverse-stars type transformator that Y/Y/Y connects uses star connection, and secondary is two groups of separate Y shapes connection windings, and two groups of vice-side winding output voltage phase 180 °；These two groups of double reverse-stars type transformers connected in parallel connect, primary side winding all with three-phase alternating-current supplyu A、u B、u CIt is connected, four independent vice-side winding are connected with first group of three-plase half wave rectifier circuit, second group of three-plase half wave rectifier circuit, the 3rd group of three-plase half wave rectifier circuit, the 4th group of three-plase half wave rectifier circuit respectively, and four groups of three-plase half wave rectifier circuits are connected in parallel by paralleing reactor；The P1 end of the paralleing reactor 1 with secondary and the outfan anode of first group of three-plase half wave rectifier circuit are connected, the outfan anode of Q1 end and second group of three-plase half wave rectifier circuit is connected, paralleing reactor 1 with secondary is for absorbing the instantaneous difference of output voltage of first group of three-plase half wave rectifier circuit and second group of three-plase half wave rectifier circuit, make first group of three-plase half wave rectifier circuit and the second group of three-plase half wave rectifier circuit can independent parallel operation
The outfan anode of the P2 end of paralleing reactor 2 and the 3rd group of three-plase half wave rectifier circuit is connected, the outfan anode of Q2 end and the 4th group of three-plase half wave rectifier circuit is connected, paralleing reactor 2 is for absorbing the 3rd group of three-plase half wave rectifier circuit and the instantaneous difference of output voltage of the 4th group of three-plase half wave rectifier circuit so that the 3rd group of three-plase half wave rectifier circuit and the 4th group of three-plase half wave rectifier circuit can independent parallel operations；The P3 end of paralleing reactor 3 is connected with the outfan of the paralleing reactor 1 of band secondary, Q3 end is connected with the outfan of paralleing reactor 2, paralleing reactor 3 is used for paralleing reactor 1 and the instantaneous difference of paralleing reactor 2 output voltage of absorption band secondary, make two groups of rectification circuits can independent parallel operation, thus form 12 pulse current；Load one end is connected with the outfan of paralleing reactor 3, and the outfan negative electrode of the other end and first group of three-plase half wave rectifier circuit, the outfan negative electrode of second group of three-plase half wave rectifier circuit, the outfan negative electrode of the 3rd group of three-plase half wave rectifier circuit, the common point of outfan negative electrode of the 4th group of three-plase half wave rectifier circuit are connected；Two outfans of single-phase full bridge inverter circuit are connected with the secondary of the paralleing reactor 1 of band secondary, by controlling the turn-on and turn-off of IGBT in single-phase full bridge inverter circuit, inject to the secondary of the paralleing reactor 1 of band secondary and control electric current, the output electric current of this commutation system is modulated, makes commutator input current waveform tend to sinusoidal wave.
Owing to using above technical scheme, the present invention has the advantages that 1 compared to existing technology) present invention uses combination type double reverse-stars type commutator to be connected in parallel, and can be obviously enhanced the ability of output electric current, be suitably applied the occasion of large current load.2) present invention uses four groups of three-plase half wave rectifier circuits to be connected in parallel composition commutation system, and relative to three-phase bridge rectifier circuit, contained power electronic devices is few, and on-state loss is little, is conducive to improving the effciency of energy transfer of commutator.3) present invention is by controlling conducting and the shutoff of IGBT in single-phase bridge inverter circuit, to the secondary injecting compensating electric current of paralleing reactor, the output electric current of three-plase half wave rectifier circuit is modulated, can effectively suppress AC Harmonics of Input, it is simple to production application.
4) present invention uses three paralleing reactors, absorbs the instantaneous difference of four groups of three-plase half wave rectifier circuit output voltages, can form 12 pulse wave rectifiers, effectively reduces the pulsation of load voltage and electric current.
Accompanying drawing explanation
Fig. 1 is commutator and the harmonic suppressing method schematic diagram thereof of the present invention；Fig. 2 is the double reverse-stars type transformer winding structure figure of of the present invention/Y/Y connection；Fig. 3 is the double reverse-stars type transformer winding structure figure of Y/Y/Y of the present invention connection；Fig. 4 is the active balancing reactor winding construction figure of band secondary；In Fig. 1, Fig. 2, Fig. 3, Fig. 4i A、i B、i CFor three-phase input current,i A1、i B1、i C1For the input current of the double reverse-stars type transformator of/Y/Y connection,i a1、i b1、i c1For the input winding current of the double reverse-stars type transformator of/Y/Y connection,i a2、i b2、i c2Double reverse-stars type transformator for Y/Y/Y connection inputs winding current,i a11、i b11、i c11Withi a12、i b12、i c12For the double reverse-stars type transformator output winding current of/Y/Y connection, namely first group of three-plase half wave rectifier circuit and the input current of second group of three-plase half wave rectifier circuit,i a21、i b21、i c21Withi a22、i b22、i c22For the double reverse-stars type transformator output winding current of Y/Y/Y connection, namely the 3rd group of three-plase half wave rectifier circuit and the input current of the 4th group of three-plase half wave rectifier circuit, i d1、i d2、i d3、i d4It is respectively the output electric current of four groups of three-plase half wave rectifier circuits,i p1For the output electric current of the active balancing reactor 1 of band secondary,i p2For the output electric current of paralleing reactor 2,i xFor injecting the compensation electric current of active paralleing reactor 1 secondary,i oFor load current,u A、u B、u CFor three-phase mains voltage,v dcFor the voltage in single-phase full bridge inverter circuit, a1, b1, c1 is /the input winding of the double reverse-stars type transformator of Y/Y connection, a11, b11, c11 is /one group of secondary output winding of the double reverse-stars type transformator of Y/Y connection, a12, b12, c12 is /another group secondary output winding of the double reverse-stars type transformator of Y/Y connection, a2, b2, c2 is the input winding of the double reverse-stars type transformator that Y/Y/Y connects, a21, b21, c21 is one group of secondary output winding of the double reverse-stars type transformator that Y/Y/Y connects, a22, b22, c22 is another group secondary output winding of the double reverse-stars type transformator that Y/Y/Y connects,N mFor the primary side winding number of turn of the active balancing reactor 1 of band secondary,N xThe vice-side winding number of turn for the active balancing reactor 1 of band secondary.
Detailed description of the invention
Detailed description of the invention one: the combination type high-current rectifier described in present embodiment and active harmonics suppressing method thereof are described below in conjunction with Fig. 1, it includes/the double reverse-stars type transformator 1 of Y/Y connection, double reverse-stars type transformator 3, second group of three-plase half wave rectifier circuit 4 of 2, first group of three-plase half wave rectifier circuit of Y/Y/Y connection, the 3rd group of three-plase half wave rectifier circuit 5, the 4th group of three-plase half wave rectifier circuit 6, the paralleing reactor 17 of band secondary, paralleing reactor 28, paralleing reactor 39, load 10, single-phase full bridge inverter circuit 11, control circuit 12.
The double reverse-stars type transformator 1 of/Y/Y connection is as phase-shifting transformer, and its primary side winding uses triangle junction, and secondary is two groups of separate Y shapes connection windings, two groups of vice-side winding output voltage phase 180 °；The primary side winding of the double reverse-stars type transformator 2 of Y/Y/Y connection uses star connection, and secondary is two groups of separate Y shapes connection windings, and two groups of vice-side winding output voltage phase 180 °；These two groups of double reverse-stars type transformers connected in parallel connect, primary side winding all with three-phase alternating-current supplyu A、u B、u CBeing connected, four independent vice-side winding are connected with 3, second group of three-plase half wave rectifier circuit 4 of first group of three-plase half wave rectifier circuit, the 3rd group of three-plase half wave rectifier circuit 5, the 4th group of three-plase half wave rectifier circuit 6 respectively；Paralleing reactor 17 P1 end and the outfan anode of first group of three-plase half wave rectifier circuit 3 with secondary are connected, the outfan anode of Q1 end and second group of three-plase half wave rectifier circuit 4 is connected, paralleing reactor 17 with secondary is for absorbing first group of three-plase half wave rectifier circuit 3 and the instantaneous difference of second group of three-plase half wave rectifier circuit 4 output voltage, make first group of three-plase half wave rectifier circuit 3 and 4 liang of group three-plase half wave rectifier circuits of second group of three-plase half wave rectifier circuit can independent parallel operation, increase output electric current
The outfan anode of paralleing reactor 28 P2 end and the 3rd group of three-plase half wave rectifier circuit 5 is connected, the outfan anode of Q2 end and the 4th group of three-plase half wave rectifier circuit 6 is connected, paralleing reactor 28 is for absorbing the 3rd group of three-plase half wave rectifier circuit 5 and the instantaneous difference of the 4th group of three-plase half wave rectifier circuit 6 output voltage, make the 3rd group of three-plase half wave rectifier circuit 5 and 6 liang of group three-plase half wave rectifier circuits of the 4th group of three-plase half wave rectifier circuit can independent parallel operation, increase output electric current；Paralleing reactor 39 P3 end is connected with the outfan of the paralleing reactor 17 of band secondary, Q3 end is connected with the outfan of paralleing reactor 28, second level paralleing reactor 39 is used for paralleing reactor 17 and the instantaneous difference of paralleing reactor 28 output voltage of absorption band secondary, make two groups of rectification circuit systems can independent parallel operation, increase output electric current；Loading 10 one end to be connected with the outfan of paralleing reactor 39, the outfan negative electrode of the other end and first group of three-plase half wave rectifier circuit 3, the outfan negative electrode of second group of three-plase half wave rectifier circuit 4, the outfan negative electrode of the 3rd group of three-plase half wave rectifier circuit 5, the common point of outfan negative electrode of the 4th group of three-plase half wave rectifier circuit 6 are connected；Two outfans of single-phase full bridge inverter circuit 11 are connected with the secondary of the paralleing reactor 17 of band secondary, inject for secondary and control electric current；Control circuit 12 controls the turn-on and turn-off of IGBT in single-phase full bridge inverter circuit 11, inject to the secondary of the paralleing reactor 17 of band secondary and control electric current, the output electric current of first group of three-plase half wave rectifier circuit 3 and second group of three-plase half wave rectifier circuit 4 is modulated, makes commutator input current waveform tend to sinusoidal wave.
Combination type high-current rectifier described in present embodiment and active harmonics suppressing method thereof, use paralleing reactor to be connected in parallel by two groups of double reverse-stars type rectification circuits, reaches to increase the purpose of output electric current.
Detailed description of the invention two: illustrate that present embodiment, present embodiment are the further restrictions to embodiment one below in conjunction with Fig. 1, described combination type high-current rectifier and active harmonics suppressing method thereof, the concrete grammar of its suppression harmonic wave is:
Control circuit 12 gathers three phase mains input voltageu AGenerate synchronizing signal, gather load current and together send into compensating current generator with synchronizing signal, be completely suppressed the expected compensation electric current needed for commutator Harmonics of Input；Expected compensation electric current compares with the actual electric current that compensates, and utilizes the difference obtained to generate pwm signal, is controlled single-phase bridge inverter circuit 11；Single-phase bridge inverter circuit 11 produces and compensates electric current, and directly will compensate the secondary that electric current injects the paralleing reactor 17 of band secondary, the output electric current of first group of three-plase half wave rectifier circuit 3 and second group of three-plase half wave rectifier circuit 4 is modulated, makes commutator AC input currenti A、i B、i CTend to sinusoidal；Paralleing reactor 17 with secondary absorbs first group of three-plase half wave rectifier circuit 3 and the instantaneous difference of second group of three-plase half wave rectifier circuit 4 output voltage, form 6 pulse current, paralleing reactor 28 absorbs the 3rd group of three-plase half wave rectifier circuit and the instantaneous difference of the 4th group of three-plase half wave rectifier circuit output voltage, form 6 pulse current, paralleing reactor 39 absorbs the instantaneous difference of two groups of Output Voltage in Rectified Circuits, and making load voltage is 12 pulse waves.
nullDetailed description of the invention three: below in conjunction with Fig. 1、Fig. 2 and Fig. 3 illustrates present embodiment，Present embodiment is the further restriction to embodiment one，The double reverse-stars type transformator 1 of described/Y/Y connection is by stem stem (1)、Stem stem (2)、Stem stem (3) and winding a1、Winding b1、Winding c1、Winding a11、Winding b11、Winding c11、Winding a12、Winding b12、Winding c12 forms，Three windings are had on each stem stem，One primary side winding and two vice-side winding，Winding a1、Winding b1、Winding c1 is /the input winding of the double reverse-stars type transformator 1 of Y/Y connection，Employing dihedral connects，Loop can be provided for 3 multiplied frequency harmonic，Winding a11、Winding b11、Winding c11 is /one group of output winding of the double reverse-stars type transformator 1 of Y/Y connection，Use star connection，Winding a12、Winding b12、Winding c12 is /another group output winding of the double reverse-stars type transformator 1 of Y/Y connection，Use star connection，Two secondary output windings are separate，Export the three-phase voltage that two groups of phase places differ 180 ° successively；nullThe double reverse-stars type transformator 2 of Y/Y/Y connection is by stem stem (4)、Stem stem (5)、Stem stem (6) and winding a2、Winding b2、Winding c2、Winding a21、Winding b21、Winding c21、Winding a22、Winding b22、Winding c22 forms，Three windings are had on each stem stem，One primary side winding and two vice-side winding，Winding a2、Winding b2、Winding c2 is the input winding of the double reverse-stars type transformator 2 that Y/Y/Y connects，Use star connection，Winding a21、Winding b21、Winding c21 is one group of output winding of the double reverse-stars type transformator 2 that Y/Y/Y connects，Use star connection，Winding a22、Winding b22、Winding c22 is another group output winding of the double reverse-stars type transformator 2 that Y/Y/Y connects，Use star connection，Two secondary output windings are separate，Export the three-phase voltage that two groups of phase places differ 180 ° successively；The double reverse-stars type transformator 2 of double reverse-stars type the transformator 1 and Y/Y/Y connection of/Y/Y connection is two separated transformers being connected in parallel, and its input is commonly connected to three-phase alternating-current supplyu A、u B、u COn, outfan and four groups of three-plase half wave rectifier circuits in parallel are connected, and can increase output electric current.
, owing to there is electrical isolation so that combination type high-current rectifier has higher safety in the double reverse-stars type transformator that present embodiment uses.
Detailed description of the invention four: illustrating that present embodiment, present embodiment are the further restrictions to embodiment one below in conjunction with Fig. 1 and Fig. 4, the paralleing reactor 17 of described band secondary is made up of primary side winding and vice-side winding；The outfan anode of the P1 end of primary side winding and first group of three-plase half wave rectifier circuit 3 is connected, and the outfan anode of Q1 end and second group of three-plase half wave rectifier circuit 4 is connected, for absorbing the instantaneous difference of two groups of three-plase half wave rectifier circuit output voltages；Vice-side winding is connected with the outfan of single-phase full bridge inverter circuit 11, control circuit 12 controls the IGBT conducting of single-phase full bridge inverter circuit 11 and compensates electric current with turning off to produce, the output electric current of first group of three-plase half wave rectifier circuit 3 and second group of three-plase half wave rectifier circuit 4 is modulated so that three-phase input currenti A、i B、i CFor sine wave.
Claims (5)
1. a combination type high-current rectifier and active harmonics suppressing method thereof, it is characterized in that, it includes: the double reverse-stars type transformator (1) of/Y/Y connection, the double reverse-stars type transformator (2) of Y/Y/Y connection, first group of three-plase half wave rectifier circuit (3), second group of three-plase half wave rectifier circuit (4), 3rd group of three-plase half wave rectifier circuit (5), 4th group of three-plase half wave rectifier circuit (6), paralleing reactor 1(7 with secondary), paralleing reactor 2(8), paralleing reactor 3(9), load (10), single-phase full bridge inverter circuit (11), control circuit (12),
The primary side winding of the double reverse-stars type transformator (1) of/Y/Y connection uses triangle junction, and secondary is two groups of separate Y shapes connection windings, and two groups of vice-side winding output voltage phase 180 °；The primary side winding of the double reverse-stars type transformator (2) of Y/Y/Y connection uses star connection, and secondary is two groups of separate Y shapes connection windings, and two groups of vice-side winding output voltage phase 180 °,
These two groups of double reverse-stars type transformers connected in parallel connect, primary side winding all with three-phase alternating-current supplyu A、u B、u CIt is connected, four independent vice-side winding are connected with first group of three-plase half wave rectifier circuit (3), second group of three-plase half wave rectifier circuit (4), the 3rd group of three-plase half wave rectifier circuit (5), the 4th group of three-plase half wave rectifier circuit (6) respectively, four groups of three-plase half wave rectifier circuits form parallel circuit, for increasing output electric current
Paralleing reactor 1(7 with secondary) the outfan anode of P1 end and first group of three-plase half wave rectifier circuit (3) is connected, the outfan anode of Q1 end and second group of three-plase half wave rectifier circuit (4) is connected, paralleing reactor 1(7 with secondary) for absorbing first group of three-plase half wave rectifier circuit (3) and the instantaneous difference of second group of three-plase half wave rectifier circuit (4) output voltage, make first group of three-plase half wave rectifier circuit (3) and (4) two groups of three-plase half wave rectifier circuits of second group of three-plase half wave rectifier circuit can independent parallel operation, increase output electric current；Paralleing reactor 2(8) the outfan anode of P2 end and the 3rd group of three-plase half wave rectifier circuit (5) is connected, the outfan anode of Q2 end and the 4th group of three-plase half wave rectifier circuit (6) is connected, paralleing reactor 2(8) for absorbing the 3rd group of three-plase half wave rectifier circuit (5) and the instantaneous difference of the 4th group of three-plase half wave rectifier circuit (6) output voltage, make the 3rd group of three-plase half wave rectifier circuit (5) and (6) two groups of three-plase half wave rectifier circuits of the 4th group of three-plase half wave rectifier circuit can independent parallel operation, increase output electric current
Paralleing reactor 3(9) the paralleing reactor 1(7 of P3 end and band secondary) outfan be connected, Q3 end and paralleing reactor 2(8) outfan be connected, second level paralleing reactor 3(9) for the paralleing reactor 1(7 of absorption band secondary) and paralleing reactor 2(8) the instantaneous difference of output voltage, make two groups of double reverse-stars type commutators can independent parallel operation, increase output electric current
Load (10) one end and paralleing reactor 3(9) outfan be connected, the other end and the outfan negative electrode of first group of three-plase half wave rectifier circuit (3), the outfan negative electrode of second group of three-plase half wave rectifier circuit (4), the outfan negative electrode of the 3rd group of three-plase half wave rectifier circuit (5), the common point of outfan negative electrode of the 4th group of three-plase half wave rectifier circuit (6) are connected
Two outfans of single-phase full bridge inverter circuit (11) and the paralleing reactor 1(7 of band secondary) secondary be connected, control circuit (12) controls the turn-on and turn-off of IGBT in single-phase full bridge inverter circuit (11), to the paralleing reactor 1(7 of band secondary) secondary inject control electric current, the output electric current of first group of three-plase half wave rectifier circuit (3) and second group of three-plase half wave rectifier circuit (4) is modulated, makes combination type high-current rectifier input current waveform tend to sinusoidal wave.
nullCombination type high-current rectifier the most according to claim 1 and active harmonics suppressing method thereof，It is characterized in that: the double reverse-stars type transformator (1) of/Y/Y connection is by stem stem (1)、Stem stem (2)、Stem stem (3) and winding a1、Winding b1、Winding c1、Winding a11、Winding b11、Winding c11、Winding a12、Winding b12、Winding c12 forms，Three windings are had on each stem stem，One primary side winding and two vice-side winding，Winding a1、Winding b1、Winding c1 is /the input winding of the double reverse-stars type transformator (1) of Y/Y connection，Employing dihedral connects，Loop can be provided for 3 multiplied frequency harmonic，Winding a11、Winding b11、Winding c11 is /one group of output winding of the double reverse-stars type transformator (1) of Y/Y connection，Use star connection，Winding a12、Winding b12、Winding c12 is /another group output winding of the double reverse-stars type transformator (1) of Y/Y connection，Use star connection，Two secondary output windings are separate，Export the three-phase voltage that two groups of phase places differ 180 ° successively，
nullThe double reverse-stars type transformator (2) that Y/Y/Y connects is by stem stem (4)、Stem stem (5)、Stem stem (6) and winding a2、Winding b2、Winding c2、Winding a21、Winding b21、Winding c21、Winding a22、Winding b22、Winding c22 forms，Three windings are had on each stem stem，One primary side winding and two vice-side winding，Winding a2、Winding b2、Winding c2 is the input winding of the double reverse-stars type transformator (2) that Y/Y/Y connects，Use star connection，Winding a21、Winding b21、Winding c21 is one group of output winding of the double reverse-stars type transformator (2) that Y/Y/Y connects，Use star connection，Winding a22、Winding b22、Winding c22 is another group output winding of the double reverse-stars type transformator (2) that Y/Y/Y connects，Use star connection，Two secondary output windings are separate，Export the three-phase voltage that two groups of phase places differ 180 ° successively，
The double reverse-stars type transformator (2) that the double reverse-stars type transformator (1) of/Y/Y connection and Y/Y/Y connect is two separated transformers being connected in parallel, and its input is commonly connected to three-phase alternating-current supplyu A、u B、u COn, these the two groups double reverse-stars type transformators being connected in parallel work alone, and can increase output electric current.
Combination type high-current rectifier the most according to claim 1 and active harmonics suppressing method thereof, it is characterized in that: first group of three-plase half wave rectifier circuit (3), second group of three-plase half wave rectifier circuit (4), the 3rd group of three-plase half wave rectifier circuit (5), the 4th group of three-plase half wave rectifier circuit (6) all use diode as rectifying device, thus simple in construction, to realize difficulty low；Four groups of rectification circuits all use three-phase semiwave circuit, and contained power electronic devices is few, and on-state loss is little so that this circuit has higher effciency of energy transfer；First group of three-plase half wave rectifier circuit (3) and second group of three-plase half wave rectifier circuit (4) the paralleing reactor 1(7 by band secondary) realize in parallel working alone, 3rd group of three-plase half wave rectifier circuit (5) passes through paralleing reactor 2(8 with the 4th group of three-plase half wave rectifier circuit (6)) realize in parallel working alone, the specific subharmonic that every two groups of three-plase half wave rectifier circuits produce can be cancelled out each other, and can play the effect of suppression harmonic wave to a certain extent.
Combination type high-current rectifier the most according to claim 1 and active harmonics suppressing method thereof, it is characterized in that: the paralleing reactor 1(7 of band secondary) it can absorb first group of three-plase half wave rectifier circuit (3) and the instantaneous difference of second group of three-plase half wave rectifier circuit (4) output voltage, guarantee two groups of three-plase half wave rectifier circuits can independent parallel operation, increase output electric current；Paralleing reactor 2(8) absorbable 3rd group of three-plase half wave rectifier circuit (5) and the instantaneous difference of the 4th group of three-plase half wave rectifier circuit (6) output voltage, it is ensured that two groups of three-plase half wave rectifier circuits can independent parallel operation, increase and export electric current；Paralleing reactor 3(9) the paralleing reactor 1(7 of absorbable band secondary) and paralleing reactor 2(8) the instantaneous difference of output voltage so that two groups of double reverse-stars type commutators can independent parallel operation, increase and export electric current.
nullCombination type high-current rectifier the most according to claim 1 and active harmonics suppressing method thereof，It is characterized in that: two outfans of single-phase full bridge inverter circuit (11) and the paralleing reactor 1(7 of band secondary) secondary be connected，Control circuit (12) controls the turn-on and turn-off of IGBT in single-phase full bridge inverter circuit (11)，To the paralleing reactor 1(7 of band secondary) secondary inject control electric current，The output electric current of first group of three-plase half wave rectifier circuit (3) and second group of three-plase half wave rectifier circuit (4) is modulated，Combination type high-current rectifier input current waveform is made to tend to sinusoidal wave，This at single paralleing reactor secondary by compensating by the way of injection current carries out harmonics restraint，Implementation method is simple，Harmonic suppression effect is obvious，Single-phase full bridge inverter circuit (11) equivalent capacity is low，Only account for a minimum part for system output power，Advantageously reduce volume and the cost of system.
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