CN104980047A - 24 pulse aviation self-coupling transformer rectifier based on star-shaped primary-side winding phase shift - Google Patents
24 pulse aviation self-coupling transformer rectifier based on star-shaped primary-side winding phase shift Download PDFInfo
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Abstract
The present invention discloses a 24 pulse aviation self-coupling transformer rectifier based on star-shaped primary-side winding phase shift. The 24 pulse aviation self-coupling transformer rectifier comprises a star-shaped primary-side winding phase shift self-coupling transformer as well as first, second, third and fourth three-phase rectifiers, wherein the star-shaped primary-side winding phase shift self-coupling transformer comprises a phase A, a phase B and a phase C, and the primary sides of the three phases respectively comprise a pair of long and short windings and are connected with one another to form a star-shaped structure; and the secondary side of each phase comprises four secondary side windings, the turn number of the winding is reasonably designed, and three-phase alternating-circuit output with mutual phase shit of the four groups with 15 degrees is realized by utilizing the sum of phasors of secondary side voltage and primary side voltage. The 24 pulse aviation self-coupling transformer rectifier has a simple structure and is low in content of input harmonic waves, small in amount of transformer windings, small in volume and light in weight.
Description
Technical field
The invention belongs to transformation of electrical energy technical field, particularly based on 24 pulse aviation self coupling vertoroes of star-like former limit winding phase shift.
Background technology
In industrial frequency rectifying field, multiple-pulse commutation technique is a kind of important method reducing current on line side harmonic content.12 traditional pulse transforming rectifiers, the isolating transformer vice-side winding Y type connected mode different with △ type is utilized to make two groups of three-phase voltages produce 30 ° of phase shifts, after uncontrollable rectifier, Parallel opertation, containing the DC power supply of 12 pulse waves, eliminates 5 in input current, 7 order harmonic components.This scenario-frame is simple, has higher reliability and overload capacity, but its transformer equivalent capacity is comparatively large, is 1.03 times of power output.Adopt autotransformer to replace isolation transformation to realize phase shift, as 12 arteries and veins self coupling rectifier transformers of differential △ formula, P type, star winding structure, its equivalent capacity is only about 18% of power output, can effectively reduce the volume and weight of Transformer Rectifier system.
It no matter is isolated or autocoupling type 12 arteries and veins rectifier, its input current total harmonic distortion (THD) reaches 15%, be difficult to meet the Harmonics of Input requirement that day by day improves, the root-mean-square value as the equal regulation AC electric equipment resultant distortion electric current of civil aviaton airworthiness standard RTCA DO-160E and national military standard GJB181A-2003 should not exceed 10% of fundamental current effective value.Increase umber of pulse and can reduce input harmonics content and output ripple coefficient further, on the basis of 12 arteries and veins rectifiers, change auto-transformer configuration, increase by one group of output voltage, 18 arteries and veins Transformer Rectifier systems can be realized, but its input current THD theoretical value is 10.11%, still exceeds the requirement of harmonic standard.Based on 24 pulse transforming commutation systems of differential △ winding construction, input current, containing 24 staircase waveforms, can reduce input current THD further, but transformer every phase winding quantity more (7 groups), connect comparatively complicated.
Summary of the invention
In order to solve the technical problem that above-mentioned background technology proposes, the present invention aims to provide the 24 pulse aviation self coupling vertoroes based on star-like former limit winding phase shift, and its input harmonics content is low, and Transformer Winding, iron core consumption are less, and volume is little, lightweight.
In order to realize above-mentioned technical purpose, technical scheme of the present invention is:
Comprise star-like former limit winding phase-shifting autotransformer and the first ~ four three-phase commutation bridge, described star-like former limit winding phase-shifting autotransformer comprises A, B, C three-phase, described A, B, the former limit of C three-phase all comprises a long winding and a short winding, A, B, the head end correspondence input three-phase alternating current of the short winding of C three-phase, the end of the short winding of each phase connects the head end of this mutually long winding respectively, A, B, the end of the long winding of C three-phase is interconnected and as neutral point, A, B, C three-phase all comprises 4 vice-side winding, these 4 vice-side winding are defined as the first ~ four vice-side winding successively, the head end of the first vice-side winding of A phase connects the B phase input of the first three-phase commutation bridge, the end of the first vice-side winding of A phase connects the head end of the short winding of B phase, the head end of the second vice-side winding of A phase connects the C phase input of the 4th three-phase commutation bridge, the end of the second vice-side winding of A phase connects the head end of the short winding of C phase, the head end of the 3rd vice-side winding of A phase connects the B phase input of the second three-phase commutation bridge, the end connection B phase of the 3rd vice-side winding of A phase is long, the common port of short winding, the head end of the 4th vice-side winding of A phase connects the C phase input of the 3rd three-phase commutation bridge, the end connection C phase of the 4th vice-side winding of A phase is long, the common port of short winding, the head end of the first vice-side winding of B phase connects the A phase input of the 4th three-phase commutation bridge, the end of the first vice-side winding of B phase connects the head end of the short winding of A phase, the head end of the second vice-side winding of B phase connects the C phase input of the first three-phase commutation bridge, the end of the second vice-side winding of B phase connects the head end of the short winding of C phase, the head end of the 3rd vice-side winding of B phase connects the A phase input of the 3rd three-phase commutation bridge, the end connection A phase of the 3rd vice-side winding of B phase is long, the common port of short winding, the head end of the 4th vice-side winding of B phase connects the C phase input of the second three-phase commutation bridge, the end connection C phase of the 4th vice-side winding of B phase is long, the common port of short winding, the head end of the first vice-side winding of C phase connects the A phase input of the first three-phase commutation bridge, the end of the first vice-side winding of C phase connects the head end of the short winding of A phase, the head end of the second vice-side winding of C phase connects the B phase input of the 4th three-phase commutation bridge, the end of the second vice-side winding of C phase connects the head end of the short winding of B phase, the head end of the 3rd vice-side winding of C phase connects the A phase input of the second three-phase commutation bridge, the end connection A phase of the 3rd vice-side winding of C phase is long, the common port of short winding, the head end of the 4th vice-side winding of C phase connects the B phase input of the 3rd three-phase commutation bridge, the end connection B phase of the 4th vice-side winding of C phase is long, the common port of short winding.
Further, the long winding of A phase and the turn ratio of short winding are 1:0.073, the long winding of A phase and the turn ratio of the 3rd vice-side winding are 1:0.141, the long winding of A phase and the turn ratio of the 4th vice-side winding are 1:0.141, the long winding of A phase and the turn ratio of the first vice-side winding are the long winding of 1:0.414, A phase and the turn ratio of the second vice-side winding is 1:0.414.
Further, the long winding of B phase and the turn ratio of short winding are 1:0.073, the long winding of B phase and the turn ratio of the 3rd vice-side winding are 1:0.141, the long winding of B phase and the turn ratio of the 4th vice-side winding are 1:0.141, the long winding of B phase and the turn ratio of the first vice-side winding are the long winding of 1:0.414, B phase and the turn ratio of the second vice-side winding is 1:0.414.
Further, the long winding of C phase and the turn ratio of short winding are 1:0.073, the long winding of C phase and the turn ratio of the 3rd vice-side winding are 1:0.141, the long winding of C phase and the turn ratio of the 4th vice-side winding are 1:0.141, the long winding of C phase and the turn ratio of the first vice-side winding are the long winding of 1:0.414, C phase and the turn ratio of the second vice-side winding is 1:0.414.
Further, rectifier also comprises the first ~ six interphase reactor, the positive output end of described first three-phase commutation bridge is connected through the positive output end of the first interphase reactor with the 3rd three-phase commutation bridge, the negative output terminal that the negative output terminal of the first three-phase commutation bridge is sent out through the 3rd interphase reactor and the 3rd three-phase commutation bridge is connected, the positive output end of the second rectifier bridge is connected through the positive output end of the second interphase reactor with the 4th three-phase commutation bridge, the negative output terminal of the second three-phase commutation bridge is connected through the negative output terminal of the 4th interphase reactor with the 4th three-phase commutation bridge, the two ends of described 5th interphase reactor connect the centre cap of the first interphase reactor and the centre cap of the second interphase reactor respectively, the two ends of described 6th interphase reactor connect the centre cap of the 3rd interphase reactor and the centre cap of the 4th interphase reactor respectively, the centre cap of the 5th interphase reactor is as the positive output end of rectifier, the centre cap of the 6th interphase reactor is as the negative output terminal of rectifier.
Adopt the beneficial effect that technique scheme is brought:
Compared with the 18 pulse transforming rectifiers connected with existing star-like self coupling, the every phase of the present invention only increases by 1 winding just can form 24 pulse transforming commutation systems, and winding connection is simple; Input current is containing 24 staircase waveforms, and total harmonic distortion is less than 8%, meets the requirement of harmonic standard; Output dc voltage is containing 24 pulse waves, and ripple coefficient of voltage is little, saves Large Copacity filter capacitor; Transformer equivalent capacity is only 20% of power output, maintains the advantage of autotransformer small in volume, helps the miniaturization of commutation system.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the voltage synthesis schematic diagram of three-phase windings of the present invention;
Fig. 3 is that the present invention is by the structural representation of interphase reactor by 4 rectifier bridge Parallel opertation;
Fig. 4 is winding current of the present invention synthesis schematic diagram;
Fig. 5 is A phase winding electric current of the present invention and input current theoretical waveforms;
Fig. 6 is A phase input current of the present invention and voltage simulation waveform figure;
Fig. 7 is the spectrum analysis figure of A phase input current of the present invention;
Fig. 8 is the simulation waveform figure of output voltage of the present invention.
Label declaration: the former length of side winding of ap1, bp1, cp1:A, B, C three-phase transformer, ap2, ap2, cp2: the short winding in the former limit of three-phase transformer, as1/bs1/cs1, as2/bs2/cs2, as3/bs3/cs3, as4/bs4/cs4:A, B, C three-phase transformer the first ~ four vice-side winding, Lp1 ~ Lp6: the first ~ six interphase reactor, the head end of the short winding in the former limit of a, b, c:A, B, C three-phase transformer, N: neutral point, ia, ib, ic:A, B, C three-phase input current.
Embodiment
Below with reference to accompanying drawing, technical scheme of the present invention is described in detail.
Structural representation of the present invention as shown in Figure 1, based on 24 pulse aviation self coupling vertoroes of star-like former limit winding phase shift, comprises star-like former limit winding phase-shifting autotransformer and the first ~ four three-phase commutation bridge.Described star-like former limit winding phase-shifting autotransformer comprises A, B, C three-phase, the former limit of each phase includes long winding and short winding, the short winding ends of each phase is connected with long winding head end, its common port forms A, B, C end, short winding head end a, b, c correspondence input three-phase current ia, ib, ic of A, B, C three-phase, the end of the long winding of A, B, C three-phase is interconnected and as neutral point, sees Fig. 1; The secondary of each phase all comprises four groups of vice-side winding, and the connected mode of secondary illustrates for A phase: 4 vice-side winding as
1, as
2, as
3, as
4head end be drawn out to corresponding input b1, c4, b2, c3 of the first ~ four three-phase commutation bridge respectively, see Fig. 1; Wherein the end of 2 windings as1, as2 is held with b, the c on the former limit of A phase and is connected, and the end of other 2 windings as3, as4 is held with aforementioned B, C and connected.Connected mode and the A of B, C phase are similar, as shown in Figure 1 (in order to keep, Fig. 1's is clear, and Fig. 1 eliminates the connecting line between star-like former limit winding phase-shifting autotransformer and the first ~ four three-phase commutation bridge).
The present invention will produce 24 pulses, the three-phase input voltage of the first ~ four rectifier bridge then must be made to produce 15 ° of phase shifts respectively, namely the phase place of a1, a2, a3, a4 differs from 15 ° respectively, and the phase place of b1, b2, b3, b4 differs from 15 ° respectively, and the phase place of c1, c2, c3, c4 differs from 15 ° respectively.The number of turn of the long and short winding in former limit and secondary 4 windings must have fixing no-load voltage ratio, just can reach 4 vice-side winding phase place mutual deviations 15 °.For A phase, its no-load voltage ratio relation is described: former length of side winding ap1 is 1:0.073 with the ratio of the number of turn of short winding ap2; Former length of side winding ap1 is 1:0.141 with the ratio of the number of turn of secondary 2 windings as3, as4; Former length of side winding ap1 is 1:0.414 with the ratio of the number of turn of secondary other 2 windings as1, as2.The ratio of the number of turn of B, C phase winding is consistent with A.
According to above-mentioned connected mode and turn ratio relation, first rectifier bridge input a1, b1, c1 advanced former limit a, b, c holds 22.5 °; A, b, c hold 7.5 ° on a2, b2, c2 advanced former limit; A, b, c hold 7.5 ° on a3, b3, c3 delayed former limit; A, b, c hold 22.5 ° on a4, b4, c4 delayed former limit, and rectifier voltage compositive relation as shown in Figure 2.Thus transformer output phase voltage V
aiwith input phase voltage V
inmeet equation:
In the present embodiment, as shown in Figure 3, rectifier also comprises the first ~ six interphase reactor LP1 ~ LP6, the positive output end of described first three-phase commutation bridge is connected through the positive output end of the first interphase reactor with the 3rd three-phase commutation bridge, the negative output terminal that the negative output terminal of the first three-phase commutation bridge is sent out through the 3rd interphase reactor and the 3rd three-phase commutation bridge is connected, the positive output end of the second rectifier bridge is connected through the positive output end of the second interphase reactor with the 4th three-phase commutation bridge, the negative output terminal of the second three-phase commutation bridge is connected through the negative output terminal of the 4th interphase reactor with the 4th three-phase commutation bridge, the two ends of described 5th interphase reactor connect the centre cap of the first interphase reactor and the centre cap of the second interphase reactor respectively, the two ends of described 6th interphase reactor connect the centre cap of the 3rd interphase reactor and the centre cap of the 4th interphase reactor respectively, the centre cap of the 5th interphase reactor is as the positive output end of rectifier, the centre cap of the 6th interphase reactor is as the negative output terminal of rectifier.
When 4 groups of rectifier bridges are by interphase reactor Parallel opertation, often organizing rectifier bridge can work alone, and exports 6 phases line voltage and natural commutation; Rectifier output vector is 24 phases line voltage, is all 15 ° of angles between every two phases line voltage.Therefore the mean value of output voltage is:
Because rectifier bridge works alone, the equal conducting of each rectifier diode 120 °, the current waveform that output a1, a2, a3, a4 flow out is identical, phase 15 °.According to rectifier current Vector modulation schematic diagram as shown in Figure 4 and magnetic potential balance relation, primary current can be obtained, thus synthesis is containing the input current of 24 staircase waveforms, (abscissa of Fig. 5 is phase place to waveform such as Fig. 5 of winding current and input current, ordinate is followed successively by a1 from top to bottom and holds output current, a2 end output current, a3 end output current, a4 to hold output current, former length of side winding output current, the short winding output current in former limit, A phase input current, and after numerical value, Id represents load current) shown in.
The equivalent capacity of autotransformer is:
wherein V
jfor the voltage effective value at winding two ends, I
jfor flowing through the current effective value of winding.Namely only need consider according to 20% of power output when iron core chosen by transformer, little, the lightweight advantage of autotransformer volume can be kept.
For verifying validity of the present invention, emulation experiment is carried out to the 24 pulse aviation self coupling vertoroes based on star-like former limit winding phase shift of the present invention's design.Input at 115V/400Hz, when the load of 240V 200A purely resistive exports, (abscissa of Fig. 6 is the time to input current voltage waveform such as Fig. 6 of rectifier, ordinate is electric current and voltage) shown in, input current is containing 24 staircase waveforms, and input current and input voltage phase are consistent, and have High Power Factor.The spectrum analysis figure that Fig. 7 (abscissa is frequency, and ordinate is electric current) is A phase input current, visible major harmonic is 23,25 subharmonic, and total harmonic distortion is 5.3%, meets the requirement of harmonic standard completely.Fig. 8 (abscissa is the time, and ordinate is voltage) is VD oscillogram, and voltage ripple is little, voltage pulsating factor is only 0.11%, and output voltage is steady, can save Large Copacity output filter capacitor.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (5)
1. based on 24 pulse aviation self coupling vertoroes of star-like former limit winding phase shift, it is characterized in that: comprise star-like former limit winding phase-shifting autotransformer and the first ~ four three-phase commutation bridge, described star-like former limit winding phase-shifting autotransformer comprises A, B, C three-phase, described A, B, the former limit of C three-phase all comprises a long winding and a short winding, A, B, the head end correspondence input three-phase alternating current of the short winding of C three-phase, the end of the short winding of each phase connects the head end of this mutually long winding respectively, A, B, the end of the long winding of C three-phase is interconnected and as neutral point, A, B, C three-phase all comprises 4 vice-side winding, these 4 vice-side winding are defined as the first ~ four vice-side winding successively, the head end of the first vice-side winding of A phase connects the B phase input of the first three-phase commutation bridge, the end of the first vice-side winding of A phase connects the head end of the short winding of B phase, the head end of the second vice-side winding of A phase connects the C phase input of the 4th three-phase commutation bridge, the end of the second vice-side winding of A phase connects the head end of the short winding of C phase, the head end of the 3rd vice-side winding of A phase connects the B phase input of the second three-phase commutation bridge, the end connection B phase of the 3rd vice-side winding of A phase is long, the common port of short winding, the head end of the 4th vice-side winding of A phase connects the C phase input of the 3rd three-phase commutation bridge, the end connection C phase of the 4th vice-side winding of A phase is long, the common port of short winding, the head end of the first vice-side winding of B phase connects the A phase input of the 4th three-phase commutation bridge, the end of the first vice-side winding of B phase connects the head end of the short winding of A phase, the head end of the second vice-side winding of B phase connects the C phase input of the first three-phase commutation bridge, the end of the second vice-side winding of B phase connects the head end of the short winding of C phase, the head end of the 3rd vice-side winding of B phase connects the A phase input of the 3rd three-phase commutation bridge, the end connection A phase of the 3rd vice-side winding of B phase is long, the common port of short winding, the head end of the 4th vice-side winding of B phase connects the C phase input of the second three-phase commutation bridge, the end connection C phase of the 4th vice-side winding of B phase is long, the common port of short winding, the head end of the first vice-side winding of C phase connects the A phase input of the first three-phase commutation bridge, the end of the first vice-side winding of C phase connects the head end of the short winding of A phase, the head end of the second vice-side winding of C phase connects the B phase input of the 4th three-phase commutation bridge, the end of the second vice-side winding of C phase connects the head end of the short winding of B phase, the head end of the 3rd vice-side winding of C phase connects the A phase input of the second three-phase commutation bridge, the end connection A phase of the 3rd vice-side winding of C phase is long, the common port of short winding, the head end of the 4th vice-side winding of C phase connects the B phase input of the 3rd three-phase commutation bridge, the end connection B phase of the 4th vice-side winding of C phase is long, the common port of short winding.
2. according to claim 1 based on 24 pulse aviation self coupling vertoroes of star-like former limit winding phase shift, it is characterized in that: the long winding of described A phase and the turn ratio of short winding are 1:0.073, the long winding of A phase and the turn ratio of the 3rd vice-side winding are 1:0.141, the long winding of A phase and the turn ratio of the 4th vice-side winding are 1:0.141, A phase
longthe turn ratio of winding and the first vice-side winding is the long winding of 1:0.414, A phase and the turn ratio of the second vice-side winding is 1:0.414.
3. according to claim 1 based on 24 pulse aviation self coupling vertoroes of star-like former limit winding phase shift, it is characterized in that: the long winding of described B phase and the turn ratio of short winding are 1:0.073, the long winding of B phase and the turn ratio of the 3rd vice-side winding are 1:0.141, the long winding of B phase and the turn ratio of the 4th vice-side winding are 1:0.141, B phase
longthe turn ratio of winding and the first vice-side winding is the long winding of 1:0.414, B phase and the turn ratio of the second vice-side winding is 1:0.414.
4. according to claim 1 based on 24 pulse aviation self coupling vertoroes of star-like former limit winding phase shift, it is characterized in that: the long winding of described C phase and the turn ratio of short winding are 1:0.073, the long winding of C phase and the turn ratio of the 3rd vice-side winding are 1:0.141, the long winding of C phase and the turn ratio of the 4th vice-side winding are 1:0.141, C phase
longthe turn ratio of winding and the first vice-side winding is the long winding of 1:0.414, C phase and the turn ratio of the second vice-side winding is 1:0.414.
5. according to claim 1 based on 24 pulse aviation self coupling vertoroes of star-like former limit winding phase shift, it is characterized in that: also comprise the first ~ six interphase reactor, the positive output end of described first three-phase commutation bridge is connected through the positive output end of the first interphase reactor with the 3rd three-phase commutation bridge, the negative output terminal that the negative output terminal of the first three-phase commutation bridge is sent out through the 3rd interphase reactor and the 3rd three-phase commutation bridge is connected, the positive output end of the second rectifier bridge is connected through the positive output end of the second interphase reactor with the 4th three-phase commutation bridge, the negative output terminal of the second three-phase commutation bridge is connected through the negative output terminal of the 4th interphase reactor with the 4th three-phase commutation bridge, the two ends of described 5th interphase reactor connect the centre cap of the first interphase reactor and the centre cap of the second interphase reactor respectively, the two ends of described 6th interphase reactor connect the centre cap of the 3rd interphase reactor and the centre cap of the 4th interphase reactor respectively, the centre cap of the 5th interphase reactor is as the positive output end of rectifier, the centre cap of the 6th interphase reactor is as the negative output terminal of rectifier.
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| CN105391317B (en) * | 2015-12-15 | 2018-01-30 | 南京航空航天大学 | Without the asymmetric 24 arteries and veins self coupling vertoroes of paralleing reactor |
| CN105391317A (en) * | 2015-12-15 | 2016-03-09 | 南京航空航天大学 | Asymmetrical 24-pulsewave auto-transformer rectifier without balancing reactor |
| CN105375792A (en) * | 2015-12-22 | 2016-03-02 | 南京航空航天大学 | Boost/buck type 24-pulse self-coupling transformation rectifier |
| CN105375792B (en) * | 2015-12-22 | 2018-01-30 | 南京航空航天大学 | The arteries and veins self coupling vertoro of step-up/down formula 24 |
| CN105790606A (en) * | 2016-04-01 | 2016-07-20 | 南京航空航天大学 | Hybrid P-type 24-pulse self-coupling transformer rectifier |
| CN105790606B (en) * | 2016-04-01 | 2019-07-09 | 南京航空航天大学 | Hybrid 24 pulse self coupling vertoro of p-type |
| CN105846692A (en) * | 2016-05-14 | 2016-08-10 | 广东朗腾电气有限公司 | 72 pulse wave self-coupled phase shift rectification system |
| CN107425739A (en) * | 2017-07-28 | 2017-12-01 | 南京航空航天大学 | D types 24 arteries and veins self coupling vertoroes of asymmetry |
| CN107425739B (en) * | 2017-07-28 | 2020-01-31 | 南京航空航天大学 | D-type asymmetric 24-pulse autotransformer rectifier |
| CN108074719A (en) * | 2017-11-28 | 2018-05-25 | 合肥华耀电子工业有限公司 | A kind of 18 pulse transformers |
| CN108074719B (en) * | 2017-11-28 | 2023-11-21 | 合肥华耀电子工业有限公司 | 18 pulse transformer |
| CN109067203A (en) * | 2018-08-07 | 2018-12-21 | 中国航空工业集团公司雷华电子技术研究所 | A kind of 30 pulse transforming rectifier of isolated buck-type |
| CN109687734A (en) * | 2018-11-29 | 2019-04-26 | 南京航空航天大学 | The 24 pulse aviation self coupling vertoroes based on star-like primary side winding phase shift |
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