CN103916029A - Three-phase fully-controlled bridge rectifying circuit with five-stem center point provided with subsequent flow tube - Google Patents
Three-phase fully-controlled bridge rectifying circuit with five-stem center point provided with subsequent flow tube Download PDFInfo
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- CN103916029A CN103916029A CN201410099405.5A CN201410099405A CN103916029A CN 103916029 A CN103916029 A CN 103916029A CN 201410099405 A CN201410099405 A CN 201410099405A CN 103916029 A CN103916029 A CN 103916029A
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Abstract
A three-phase fully-controlled bridge rectifying circuit with the five-stem center point provided with a subsequent flow tube is composed of a five-stem rectifying transformer, a filtering inductor, diodes, thyristors and a trigger circuit, wherein a primary winding and a secondary winding of the rectifying transformer are connected in the shape of a star, and two fly-wheel diodes and six thyristors are connected to the star-connection center point to form the three-phase fully-controlled bridge rectifying circuit as a basic circuit. The technical performance index of a power source manufactured through one five-stem rectifying transformer and a double-parallel-connection three-phase fully-controlled bridge circuits output by two three-bridge fully-controlled bridge circuits in parallel is higher than that of a France CEGELEC company direct-current electric arc furnace power source, wherein the center point of each three-bridge fully-controlled bridge circuit is provided with one subsequent flow tube. The performance of a rectifying power source with balance reactor high-power 12 pulse wave is further higher than the performance of a star-corner-connection three-phase fully-controlled bridge power source, wherein the rectifying power source is composed of one five-stem rectifying transformer, a star-connection three-phase fully-controlled bridge with the center point provided with the subsequent flow tube, and a corner-connection three-phase fully-controlled bridge. The three circuits have very good economical and social benefits in implementation of direct-current electric arc furnace, electrolysis and electroplating power sources and other high-power power sources.
Description
[one] technical field the present invention relates to neutral point the rectification circuit of continued flow tube and five stem stem rectifier transformers.
[two] the existing three-phase fully-controlled bridge rectification circuit of background technology only has five kinds of circuit, the three-phase fully-controlled bridge rectification circuit that the first is made up of 6 thyristors; The second is the three-phase fully-controlled bridge rectification circuit that the rectifier transformer secondary winding neutral point of Ba Bate invention has 1 continued flow tube: the third is the three-phase fully-controlled bridge rectification circuit that rectifier transformer secondary winding neutral point has 2 continued flow tubes, and the 4th kind is the three-phase fully-controlled bridge rectification circuit that has interphase reactor of same inventor's invention.The 5th kind is the compound fully controlled bridge rectification circuit of the three-phase bridge that has interphase reactor of same inventor's invention.First three is planted three-phase fully-controlled bridge rectification circuit and is not with interphase reactor, and rear two kinds of three-phase fully-controlled bridge rectification circuits have interphase reactor.
{ three } summary of the invention the object of the invention is: 1) simplify the structure of above-mentioned the 4th kind and the 5th kind three-phase fully-controlled bridge rectification circuit, cancel interphase reactor, but reach identical effect.2) expand output current, increase substantially power factor, reduce side harmonics electric current.3) expand output current, improve power factor, reduce rectification circuit output harmonic wave voltage.
In order to realize above-mentioned first object, the present invention adopts five stem stem three-phase rectifier transformers of 1 primary and secondary winding Y-connection, and the armature winding triangle in the three-phase fully-controlled bridge rectification circuit that has interphase reactor of alternative same inventor's invention connects, three stem stem three-phase rectifier transformers of secondary Y-connection.The same five stem stem three-phase rectifier transformers that adopt 1 primary and secondary winding Y-connection, the armature winding triangle in the compound fully controlled bridge rectification circuit of the three-phase that has interphase reactor of alternative same inventor's invention connects, three stem stem three-phase rectifier transformers of secondary Y-connection.Just can cancel the interphase reactor in above-mentioned the 4th kind and the 5th kind of circuit and reach same effect, thereby make circuit structure be simplified to the three-phase fully-controlled bridge rectification circuit of 2 continued flow tubes and have the compound fully controlled bridge rectification circuit of three-phase of 2 continued flow tubes.Its principle and the six phase half wave rectifying circuit that adopts five stem stems primary and secondary Y-connection, body generations three stem stem armature winding triangles connect, and secondary Y-connection has effect that interphase reactor six phase half wave rectifying circuit has a same effect mutually roughly the same.In order to realize above-mentioned second object, after the present invention adopts and has realized first object, with five stem stem rectifier transformers, 2 secondary winding stars, neutral point has the output that is in parallel of the three-phase fully-controlled bridge circuit of continued flow tube, and the special control method that adopts two pilot angles to touch improves the power factor of rectification circuit, minimizing grid side harmonic current.In order to realize the 3rd object, after the present invention adopts and has realized first object, obtain the commutating voltage of 12 pulse waves with 2 three-phase fully-controlled bridge circuits of 1 secondary star of a five stem stem rectifier transformer and 1 Angle connection by interphase reactor, wherein have 1 to be the three-phase fully-controlled bridge circuit that central point has continued flow tube.
Five stem stem neutral points of the present invention have the three-phase fully-controlled bridge rectification circuit of continued flow tube, it is by three-phase five stem stem rectifier transformers (B), filter inductance (L1), diode (D1～D2), thyristor (V1～V6) and circuits for triggering composition thereof, it is characterized in that: at the beginning of three-phase five stem stem rectifier transformers (B), secondary winding Y-connection, filter inductance (L1), 2 diodes (D1～D2), 6 thyristors (V1～V6) connect 1 neutral point proportionately the three-phase full-controlled bridge series inductance filter rectifier of 2 continued flow tubes, the output plus terminal (I) of rectification circuit and filter inductance (L1) one end, the other end (III) of filter inductance (L1) and 1 diode (D1) negative electrode, the negative electrode of 3 thyristors (V1～V3) connects, the anodic bonding of the output negative terminal (II) of rectification circuit and another 1 diode (D2) anode and another 3 thyristors (V4～V6), 2 diode (D1, D2) other end is connected with secondary winding central point (O), 6 thyristors (V1～V6) other end respectively with 3 secondary winding, the 3 end (a of Y-connection, b, c) connect into three-phase fully-controlled bridge rectification circuit.
Five stem stem neutral points of the present invention have the two and three-phase full-bridge controlled rectifier of continued flow tube, and it is by five stem stem rectifier transformers (B), 2 filter inductance (L1, L2), 4 diodes (D1～D4), 12 thyristors (V1～V12) and Specific trigger circuit composition thereof, is characterized in that: 3 armature winding (A1 of five stem stem rectifier transformers (B), B1, C1) Y-connection, 6 secondary winding (a, b, c and a ', b ', c ') connect into double star, first level star winding (a, b, c) with filter inductance (L1), 2 diode (D1, D2), 6 thyristors (V1～V6) connect into 1 neutral point the rectification circuit of the three-phase full-controlled bridge series inductance filtering of 2 continued flow tubes, the output plus terminal (I) of rectification circuit is connected with filter inductance (L1) one end, filter inductance (L1) other end (III) and 1 diode (D1) negative electrode, 5 connections of negative electrode of 3 thyristors (V1～V3), the output negative terminal (II) of rectification circuit and another 1 diode (D2) anode, 5 connections of anode of another 3 thyristors (V4～V6), 2 diode (D1, D2) other end is connected with 3 of secondary winding central points (O), and 6 thyristors (V1～V6) other end is held (a with 3 of secondary star windings respectively, b, c) connect into three-phase fully-controlled bridge rectification circuit, second subprime star winding (a ', b ', c ') and filter inductance (L2), 2 diode (D3, D4), it is same as described above that 6 thyristors (V7～V12) connect method of attachment, forming second neutral point has the rectification circuit of the three-phase full-controlled bridge series inductance filtering of 2 continued flow tubes, 2 neutral points have the rectification circuit output in parallel of three bridge fully controlled bridge series filtering inductance of continued flow tube, and forming five stem stem centrality has the two and three-phase fully-controlled bridge rectification circuit of continued flow tube.Trigger Angle (α 2) phase place unequal (α 1 ≠ α 2) of the Trigger Angle (α 1) of 6 thyristors (V1～V3 and V10～V12) and another 6 thyristors (V4～V9), increases substantially power factor by phase difference (α=α 1-α 2) size of selecting two Trigger Angles.
Five stem stem neutral points of the present invention have the star angle three-phase fully-controlled bridge rectification circuit of continued flow tube, it is characterized in that: output has 1 interphase reactor (L), 1 three-phase five stem stem rectification becomes device (B), it is secondary 1 Y-connection (o, a, b, c) winding be connected with 1 line voltage triangle identical with Y-connection (a ', b ', c ') winding, star winding and 2 diode (D1, D2), 6 thyristors (V1～V6) connect into neutral point the three-phase fully-controlled bridge rectification circuit of continued flow tube, delta windings and another 6 thyristors connect into three-phase fully-controlled bridge rectification circuit.2 anodes of output (III, IV) of 2 three-phase fully-controlled bridge rectification circuits are connected with 2 terminations of interphase reactor (L), the centre cap of interphase reactor is connected with output voltage anode (I), and output voltage negative terminal (II) is connected with the negative terminal of 2 three-phase full-controlled bridge rectifiers.The five stem stem neutral points of just exporting 12 pulse wave rectifier voltages at 2 DC output ends (I, II) have the star angle three-phase fully-controlled bridge rectification circuit of continued flow tube.
[four] appended drawings 1 is the three-phase full-bridge controlled rectifier schematic diagram that five stem stem neutral points have continued flow tube.
Accompanying drawing 2 is two and three-phase fully-controlled bridge rectification circuit schematic diagrams that five stem stem neutral points have continued flow tube.
Accompanying drawing 3 is former leopard cat figure of star angle three-phase fully-controlled bridge rectification circuit electricity that five stem stem neutral points have continued flow tube.Their common trait is to have five stem stem three-phase rectifier transformers, and armature winding is Y-connection, and the star-like connection neutral point of secondary winding is all connected with 2 continued flow tubes.
[five] embodiment accompanying drawing 1 is the three-phase fully-controlled bridge rectification circuit schematic diagram that five stem stem neutral points have continued flow tube.From accompanying drawing 1: three-phase rectifier transformer (B) is the transformer of 1 armature winding Y-connection, 3 secondary winding connect into star, in neutral tap (O), be connected with 2 fly-wheel diodes (D1, D2), 3 terminations (a, b, c) connect 6 thyristor V1～V6 composition three-phase fully-controlled bridge rectification circuit, thyristor V1, V2, V3, rectifier diode D2 form again 1 three-phase half-wave controlled rectifier circuit simultaneously, and thyristor V4, V5, V6, rectifier diode D1 form again another 1 three-phase half-wave controlled rectifier circuit.Because three-phase bridge line voltage commutation voltage and 2 three-phase phase voltage commutating voltages differ 30 degree in phase place, therefore, in the time that the pilot angle of three-phase full-bridge controlled rectifier line circuit is regulated to maximum by minimum value, output two ends (the III of phase control rectifier circuit, the envelope of output voltage instantaneous value II), just only has the instantaneous value of three-phase line voltage bridge rectifier, the instantaneous value of three-phase line voltage bridge rectifier voltage gradually to previous section, aft section is that 2 whole instantaneous voltages of three-phase phase voltage half-wave are excessive, last excessively only have 2 such processes of three-phase phase voltage halfwave rectifier output voltage instantaneous value to output 2 ends.Again five stem stem three-phase rectifier transformers of armature winding Y-connection due to rectifier transformer, it can play the action effect with interphase reactor six phase half wave rectifying circuit to secondary six phase half-wave rectifications, make the angle of flow of winding and device increase to 2 times of six phase half-waves, improve the utilance of winding and device, reduce loss, simplify circuit structure, there is interphase reactor neutral point to have 2 continued flow tube three-phase fully-controlled bridge circuits to want advanced with the 4th kind of same invention, the great basic phase control rectifier circuit invention more having practical value.Why invention claims that it is the invention of great tandem circuit, because, it can be widely used in and manufacture high power three-phase bridge rectification power on the one hand, on the other hand by the circuit of 2 or multicircuit multiple combination, and with the circuit combinational circuits such as traditional triangle shape three-phase fully-controlled, can produce the rectifier power source of tens thousand of amperes to the high-power super high power of hundreds thousand of Ampere currents, for large-sized DC arc furnace, the large industrial site such as large-scale electrolysis, plating.
Accompanying drawing 2 is two and three-phase fully-controlled bridge rectification circuit schematic diagrams that five stem stem neutral points of the present invention have continued flow tube.From accompanying drawing 1: three-phase rectifier transformer (B) is 3 armature windings (A1, B1, C1) Y-connections, 6 secondary winding (a, b, c and a ', b ', c ') connect into double star, above 1 level star winding (a, b, c) and filter inductance (L1), 2 diodes (D1, D2), 6 thyristors (V1～V6) connect into 1 neutral point the rectification circuit of the three-phase full-controlled bridge series inductance filtering of 2 continued flow tubes.1 level star winding (a ', b ', c ') connects into another 1 neutral point with filter inductance (L2), 2 diodes (D3, D4), 6 thyristors (V7～V12) below the rectification circuit of the three-phase fully-controlled sedan-chair series inductance filtering of continued flow tube.2 rectification circuit outputs in parallel, forming five stem stem centrality has the two and three-phase fully-controlled bridge rectification circuit of continued flow tube.
In order to make the power supply that this rectification circuit is manufactured obtain High Power Factor, make the harmonic wave that 2 rectifiers produce can offset a part at five stem stem rectifier transformers, this rectifier adopts special phase-shift trigger circuit: Trigger Angle (α 2) phase place unequal (α 1 ≠ α 2) of scheming Trigger Angle (α 1) Yu another 6 thyristors (V4～V9) of upper 6 thyristors (V1～V3 and V10～V12).The VD of rectifier power source is the function of 2 Trigger Angles (α 1, α 2), in other words there are multiple α 1 and α 2 Trigger Angles to select corresponding to 1 VD, this just creates New Terms for improving power factor, 2 Trigger Angle phase difference α=α 1-α 2, in the time that α changes 20 °, 5 subharmonic move 100 °, and 7 subharmonic move 140 °, concerning every subharmonic, always there are a α 1 and α 2 to be worth, certain subharmonic is offseted, and the method selected phase that just can select to offset harmonic current is poor, improves power factor.Therefore, this rectification circuit is except adopting traditional VD control method, more than a control method of selecting to improve power factor.Make the power supply of this rectified current circuit reach single neutral point to have the three-phase fully-controlled bridge circuit of the continued flow tube object that is beyond one's reach, make the power supply of rectification circuit obtain optimum performance.
China introduces 700 volts of 100KA direct current electric arc furnace DC power supply of French CE GELEC company, just adopt this special new type of control method to obtain High Power Factor and the few DC power supply of grid side harmonic current, it can be cancelled high pressure tune switch, dynamic power factor compensator, can reduce the advantages such as rectifier transformer capacity approximately 20%.The source circuit of manufacturing by circuit design of the present invention and the difference of the said firm's power circuit: five stem stem three-phase rectifier transformers of armature winding Y-connection for the present invention, the three stem stem rectifier transformers that body connects for French CE GELEC company armature winding triangle, consequently improve the angle of flow of secondary winding and rectifying device, improve the utilance of rectifier transformer secondary winding utilance and rectifying device.Therefore, have than the similar rectifier power source of French CE GELEC company development and have larger economic benefit and social benefit.
Accompanying drawing 3 is star angle three-phase fully-controlled bridge rectification circuit schematic diagrams that the present invention's five stem stem neutral points have continued flow tube.As seen from the figure: five stem stem rectifier transformers (B) are 3 armature windings (A1, B1, C1) Y-connections, 3 secondary winding (a, b, c) Y-connections, another 3 secondary winding (a ', b ', c ') Y-connection, 3 secondary Y-connections (o, a, b, the c) rectification circuit of winding, 2 diodes (D1, D2), 6 thyristors (V1～V6) composition, 6 pulse waves, export 6 pulse wave electric voltages at III, II two ends, there is the feature of accompanying drawing 1.Another 3 secondary triangles connect (o ', a ', b ', c ') winding, another 6 thyristors (V7～V12) composition three-phase full-controlled bridge rectification 6 pulse wave rectifier voltages, because 2 bridge rectifier output voltage phase differences 30 are spent, therefore, 2 rectifiers are exported 2 ends (III, IV) and are connected to 2 terminations of interphase reactor (L), just can export the commutating voltage of 12 pulse waves at interphase reactor (L) centre cap.On it and textbook, the difference of 12 Pulses Rectifier circuit is: rectifier transformer (B) adopts the neutral point in five stem stem transformers and star fully controlled bridge rectification circuit to have 2 continued flow tubes.Be exactly these 2 ON time and the utilances that improved secondary star winding and device.In this circuit diagram, drawings attached 1 property point has 1 three-phase fully-controlled bridge circuit of continued flow tube, therefore, also belongs to scope of the present invention.
The present invention can be widely used in the applicable occasion of three-phase full-bridge controlled rectifier, as power supplys such as direct current electric arc furnace power supply, electrolysis, plating, electrifications, has larger economic benefit and society's effect.
Claims (4)
1. a stem stem central point has the three-phase fully-controlled bridge rectification circuit of continued flow tube, it is by five stem stem rectifier transformers (B), filter inductance (L1), diode (D1～D2), thyristor (V1～V6) and circuits for triggering composition thereof, it is characterized in that: at the beginning of five stem stem rectifier transformers (B), secondary winding Y-connection, filter inductance (L1), 2 diodes (D1～D2), 6 thyristors (V1～V6) connect proportionately 1 central point with the rectification circuit of the three-phase full-controlled bridge series filtering inductance of 2 continued flow tubes, rectification circuit output plus terminal (I) and filter inductance (L1) one end, the other end (III) of filter inductance and 1 diode (D1) negative electrode, 5 connections of negative electrode of 3 thyristors (V1～V3), rectification circuit output negative terminal (II) is connected with 5, the anode of another 1 diode (D2) anode and another 3 thyristors (V4～V6), 2 diode (D1, D2) other end is connected with secondary winding star neutral point (O), 6 thyristors (V1～V6) other end respectively with 3 secondary winding end (a of Y-connection, b, c) head connects and composes three-phase fully-controlled bridge rectification circuit.
2. five stem stem neutral points have a two and three-phase fully-controlled bridge rectification circuit for continued flow tube, and it is by five stem stem rectifier transformers (B), 2 filter inductance (L1, L2), 4 diodes (D1～D4), 12 thyristors (V1～V12) and circuits for triggering composition thereof, is characterized in that: 3 armature winding (A1 of five stem stem rectifier transformers (B), B1, C1) Y-connection, 6 secondary winding (a, b, c and a ', b ', c ') connect into double star, first level star winding (a, b, c) with filter inductance (L1), 2 diode (D1, D2), 6 thyristors (V1～V6) connect into 1 neutral point the rectifier of the three-phase full-controlled bridge series inductance filtering of 2 continued flow tubes, rectifier output plus terminal (I) is connected with filter inductance (L1) one end, the other end (III) of filter inductance and 1 diode (D1) negative electrode, 5 connections of negative electrode of 3 thyristors (V1～V3), rectifier power source output negative terminal (II) and another 1 diode (D2) anode, 5 connections of anode of another 3 thyristors (V4～V6), 2 diode (D1, D2) other end is connected with 3 of secondary winding central points (O), and 6 thyristors (V1～V6) other end is held (a with 3 of secondary star windings respectively, b, c) connect three-phase bridge rectification, second subprime star winding (a ', b ', c ') and filter inductance (L2), 2 diode (D3, D4), it is same as described above that 6 thyristors (V7～V12) connect method of attachment, forming second neutral point has the rectification circuit of the three-phase full-controlled bridge series filtering inductance of 2 continued flow tubes, 2 neutral points have the rectification circuit of the rectification circuit output in parallel of three bridge fully controlled bridge series filtering inductance of continued flow tube, and the high-power five stem stem central points that form 1 requirement 1 feature of having the right have the two and three-phase full-controlled bridge rectified current circuit of continued flow tube.
3. five stem stem neutral points claimed in claim 2 have the two and three-phase fully-controlled bridge rectification circuit of continued flow tube, it is characterized in that: 12 thyristors have the signal of 2 dephased Trigger Angles Trigger Angle (α 2) phase place unequal (α 1 ≠ α 2) of the Trigger Angle (α 1) of 6 thyristors (V1～V3 and V10～V12) and another 6 thyristors (V4～V9).
4. five stem stem neutral points have a star angle three-phase fully-controlled bridge rectification circuit for continued flow tube, it by it by five stem stem rectifier transformers (B), 1 balance inductance device (L), 2 diode (D1, D2), 12 thyristors (V1～V12) and circuits for triggering composition thereof, is characterized in that: output has 1 interphase reactor (L), five stem stem rectifications become devices (B), and it is secondary 1 Y-connection (o, a, b, c) winding be connected with 1 line voltage triangle identical with Y-connection (a ', b ', c ') winding, star winding and 2 diode (D1, D2), 6 thyristors (V1～V6) connect into neutral point the three-phase fully-controlled bridge rectification circuit of continued flow tube, delta windings and another 6 thyristors (V7～V9) connect into three-phase fully-controlled bridge rectification circuit, 2 anode (III of output of 2 three-phase fully-controlled bridge rectification circuits, IV) be connected with 2 terminations of interphase reactor (L), the centre cap of interphase reactor is connected with output voltage anode (I), and output voltage negative terminal (II) is connected with the negative terminal of 2 three-phase fully-controlled bridge rectification circuits.At 2 DC output ends (I, II) output, the 12 pulse wave rectifier voltages of 2 rectification circuits, forming the secondary star of 1 requirement 1 feature of having the right and the high-power 5 stem stem centrality points of Angle connection has the star angle three-phase fully-controlled bridge rectification circuit of continued flow tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410099405.5A CN103916029A (en) | 2014-03-11 | 2014-03-11 | Three-phase fully-controlled bridge rectifying circuit with five-stem center point provided with subsequent flow tube |
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| CN201410099405.5A CN103916029A (en) | 2014-03-11 | 2014-03-11 | Three-phase fully-controlled bridge rectifying circuit with five-stem center point provided with subsequent flow tube |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106452135A (en) * | 2016-11-10 | 2017-02-22 | 上海泓语电气技术有限公司 | Power distribution transformer rectifier |
| CN106533221A (en) * | 2016-12-08 | 2017-03-22 | 株洲中车时代装备技术有限公司 | High-power universal PWM rectifier and control method thereof |
| CN109347086A (en) * | 2018-10-17 | 2019-02-15 | 南方电网科学研究院有限责任公司 | A kind of open-loop control method inhibiting double 12 pulsation, 24 resonance in midpoint |
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| CN109347086A (en) * | 2018-10-17 | 2019-02-15 | 南方电网科学研究院有限责任公司 | A kind of open-loop control method inhibiting double 12 pulsation, 24 resonance in midpoint |
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Application publication date: 20140709 |