CN1238872C - Secondary side central-tapped Scott wiring transformer - Google Patents
Secondary side central-tapped Scott wiring transformer Download PDFInfo
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- CN1238872C CN1238872C CN 200310101801 CN200310101801A CN1238872C CN 1238872 C CN1238872 C CN 1238872C CN 200310101801 CN200310101801 CN 200310101801 CN 200310101801 A CN200310101801 A CN 200310101801A CN 1238872 C CN1238872 C CN 1238872C
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Abstract
The present invention relates to a secondary side midpoint pull-out type Scott wire connection transformer which is composed of an oil tank, a radiator and two single-phase transformers in M transform and T transform, a connection type of a primary side is identical to that of the publicly known Scott wire connection transformer, a midpoint f of an M transform secondary side winding bc of the transformer is withdrawn, a midpoint e of a T transform secondary side winding ad is withdrawn, and the midpoints e and f and winding endpoints a, d, b and c are respectively led outside the oil tank of the transformer vt insulated sleeve pipes; the M transform and the T transform adopts a double-post iron core, and a winding BC is divided into four sections which are in interlaced series connection or parallel connection with each other by adopting a core stepped post, the winding bc is divided into four sections which are in interlaced series connection or parallel connection with each other by adopting a core stepped post, an arrangement way of the winding ad is kept to be identical to the winding bc, a winding AD is divided into two sections which are in series connection or parallel connection with each other by adopting a core stepped post, and a midpoint of the winding AD is not withdrawn. A traction substation can simplify connected wires of the traction substation by adopting the transformer, the number of required switching devices is reduced, the occupation area is decreased and the investment is reduced.
Description
Technical field
The invention belongs to the three-phase to two phase balance transformer technical field, specifically, relate to a kind of three-phase to two phase balance transformer that is applied to electric railway autotransformer (AT) supply power mode.
Background technology
The many circuits of China's electric railway adopt autotransformer (AT) supply power mode, and the transformer that traction substation uses is mainly Scott (Scott) wiring balancing transformer.This transformer is to introduce from Japan in 1985, is made up of two single-phase transformers, is called that M becomes and T becomes, and can adopt the singlecore structure, also can adopt two core constructions, during employing pair core construction, and general shared fuel tank and radiator; The number of turn that M becomes first side winding BC is ω
1, the number of turn that T becomes first side winding AD into
Its D end is connected in the mid point of BC.The number of turn that M becomes secondary side winding bc is ω
2, the number of turn that T becomes secondary side winding ad is ω
2Primary side three terminal A, B, C connect three phase network, and secondary side is two electric separate single-phase ports of going up, totally 4 terminal a, d, b, c.As is generally known when Scott wiring transformer secondary side two single-phase load amplitudes and power factor all equated, primary side three-phase current symmetry realized three-phase one or two symmetrical conversion.When the Scott wiring transformer is applied to AT supply power mode tractive power supply system, two single-phase ports of secondary side need could connect the traction net through AT, the single line electric railway is at least 2 AT, the multiple line of electrified railway is generally wanted 4 AT, the about 5～10MVA of the capacity of every AT.The Scott wiring transformer connected by its winding and arrangement limits, and the secondary side mid point is not extracted out, therefore, adopt the traction substation of scott wiring transformer, many AT are set, cause electric substation's wiring complexity in electric substation, required switchgear is many, and floor space is big, and investment is big.
Summary of the invention
The present invention is directed to the technological deficiency of Scott wiring transformer, secondary side mid point pull-out type Scott is provided wiring transformer, when keeping Scott wiring transformer advantage, overcome its shortcoming, connect and arrangement by changing winding, the mid point of two single-phase ports of its secondary side is all extracted out, thus can be easily to the directly power supply of traction net.
Technical scheme of the present invention:
Secondary side mid point pull-out type Scott wiring transformer is become to become with the T allosteric by fuel tank, radiator and two single-phase transformer M, and the number of turn that M becomes first side winding BC is ω
1, the number of turn that T becomes first side winding AD into
Its D end is connected in the mid point of BC, it is characterized in that, the mid point f that M becomes secondary side winding bc extracts out, and the mid point e that T becomes secondary side winding ad extracts out, and mid point e and f and winding end points a, d, b, c all guide to the oil tank of transformer outside by insulating sleeve.
If do not change the winding arrangement of existing Scott wiring transformer, only draw the mid point of secondary side winding simply, its performance is unfavorable, can not satisfy the electrifing railway supply needs.The specification requirement of secondary side mid point pull-out type Scott wiring transformer is: (1) for reducing the backflow impedance that T becomes the primary side load current, and M becomes between the two and half sections BD of first side winding BC and the DC and answers close-coupled, reduces the short-circuit impedance between the two as far as possible; (2) for satisfying the anti-tampering of tractive power supply system and power supply needs, M becomes between the two and half sections bf of secondary side winding bc and the fc and answers close-coupled, reduce the short-circuit impedance between the two as far as possible, T becomes between the two and half sections ae of secondary side winding ad and the ed and answers close-coupled, reduces the short-circuit impedance between the two as far as possible; (3) consider half section on-load of secondary side possibility, the short-circuit impedance that M becomes between secondary side winding bf section (or fc section) and the first side winding BC is unsuitable too high, and the short-circuit impedance that T becomes between secondary side winding ae section (or ed section) and the first side winding AD is unsuitable too high; (4) when primary side A, B, C three short-circuits of terminals, the short-circuit impedance that records from secondary side bc and ad is answered approximately equal respectively.
For satisfying above-mentioned specification requirement, key is the reasonable Arrangement winding.M becomes and T becomes employing queen post iron core, and winding BC is divided into four sections, and employing is striden the connection of stem interleaved series or is connected in parallel; Winding bc is divided into four sections, and employing is striden the connection of stem interleaved series or is connected in parallel; It is consistent with bc that the arrangement of winding ad keeps; The arrangement of winding AD has two kinds: (1) winding AD is divided into two sections, and employing is striden stem and is connected in series or is connected in parallel, and mid point is not extracted out.(2) be similar to winding BC, winding AD is divided into four sections, and employing is striden the connection of stem interleaved series or is connected in parallel, and mid point is not extracted out.
Beneficial effect of the present invention:
When traction substation adopts secondary side mid point pull-out type Scott wiring transformer of the present invention, two single-phase ports of secondary side can directly be powered to the AT Supplied Catenary System easily, wherein the mid point of secondary side winding is connected with rail, in traction substation, do not need to be provided with again AT, thereby under the prerequisite that does not reduce whole electric power system technical performance, simplify the wiring of traction substation, reduce required switchgear number, reduce floor space, reduce investment.
Description of drawings
Fig. 1 is the winding layout plan of secondary side mid point pull-out type Scott wiring transformer
Fig. 2 is that the winding of secondary side mid point pull-out type Scott wiring transformer connects and the layout schematic diagram
Fig. 3 is divided into four sections employing interleaved series connectivity scenario schematic diagrames for M becomes first side winding BC
Fig. 4 is divided into four sections employing crisscross parallel connectivity scenario schematic diagrames for M becomes first side winding BC
Fig. 5 is divided into four sections employing interleaved series connectivity scenario schematic diagrames for M becomes secondary side winding bc (and T becomes secondary side winding ad)
Fig. 6 is divided into four sections employing crisscross parallel connectivity scenario schematic diagrames for M becomes secondary side winding bc (and T becomes secondary side winding ad)
Fig. 7 is divided into two sections employings scheme schematic diagram that is connected in series for T becomes first side winding AD
Fig. 8 is divided into two sections employings scheme schematic diagram that is connected in parallel for T becomes first side winding AD
Fig. 9 is for adopting secondary side mid point pull-out type Scott wiring transformer of the present invention to single line electrifing railway supply schematic diagram.Among Fig. 9, secondary side mid point pull-out type Scott wiring transformer can save two AT (they are installed in the traction substation usually) in Circuit Fault on Secondary Transformer exit directly to the power supply of traction net.Also show among the figure apart from AT that is connected to the traction net at a distance of electric substation and the train that is in traction net diverse location, T, R, the F of the online mark of traction represent contact wire, rail, positive feeder respectively.
Embodiment
Fig. 1 and Fig. 2 adopt the embodiment of two two-legged singlephase transformers according to the secondary side mid point pull-out type Scott wiring transformer of technical solution of the present invention formation, and Fig. 1 is the winding layout plan, and Fig. 2 is that winding connects and the layout schematic diagram.(see figure 2) among this embodiment, winding BC is divided into four sections employings and strides the connection of stem interleaved series, each section is labeled as 1,2,3,4 respectively, winding bc is divided into four sections employings and strides the connection of stem crisscross parallel, each section is labeled as 5,6,7,8 respectively, and winding AD is divided into two sections employings and is connected in series, and each section is labeled as 9,10 respectively, winding ad is divided into four sections employings and strides the connection of stem crisscross parallel, and each section is labeled as 11,12,13,14 respectively.
Among Fig. 1, every section winding adopts cylindrical layer winding.M becomes winding bc and arranges near unshakable in one's determination, arranges two coils on each stem; Wherein, coil 5 and coil 7 are arranged in the C post, and coil 7 is in the inboard; Coil 6 and coil 8 are arranged in the B post, and coil 8 is in the inboard; Stride the stem crisscross parallel by the connectivity scenario of Fig. 2 signal and connect, that is, coil 5 and coil 8 formation half winding fc in parallel, coil 6 and coil 7 formation half winding bf in parallel, two and half winding bf are connected with fc and are constituted winding bc, and mid point f extracts out.The winding BC that M becomes is arranged in the outside, arranges two coils on each stem; Wherein, coil 1 and coil 3 are arranged in the C post, and coil 3 is in the inboard; Coil 2 and coil 4 are arranged in the B post, and coil 2 is in the inboard; Striding the stem interleaved series by the connectivity scenario of Fig. 2 signal connects, that is, coil 1 is connected with coil 2 and is constituted half winding DC, and coil 3 is connected with coil 4 and constituted half winding BD, two and half winding BD connect with DC and constitute winding BC, and mid point D extracts out with the D end of T change winding AD and is connected.
It is similar that the arrangement of T change winding ad and M become winding bc, and mid point e extracts out.T becomes winding AD and is arranged in the outside, arranges a coil on each stem, and wherein, coil 9 is arranged in the D post, and coil 10 is arranged in the A post, and coil 9 and coil 10 are connected in series by the connectivity scenario of Fig. 2 signal.
Require and insulating requirements is determined radial distance (being the radial distance between coil 3 and coil 5 and coil 2 and the coil 6) between BC and the bc according to the short-circuit impedance of transformer, then by adjusting the radial distance (being the radial distance between coil 9 and coil 11 and coil 10 and the coil 12) between AD and the ad, make when A, B, C three short-circuits of terminals, respectively the short-circuit impedance approximately equal that records from bc and ad.If the capacity of bc (or number of ampere turns) is designated as 100, each coil capacity allocation is as follows: four coil capacity of bc are 25; Four coil capacity of ad are 25; The capacity of BC is 115.5, and every coil is 28.88; The capacity of AD is 100, and every coil is 50.M becomes and T becomes shared fuel tank and radiator, fits together, and a of the A of primary side, B, C and secondary side, e, d, b, f, c are guided to the fuel tank outside by insulating sleeve, constitutes secondary side mid point pull-out type Scott wiring transformer.
In the above-described embodiments, winding BC also can adopt the subsection interleaving scheme that is connected in parallel, as shown in Figure 4; Winding bc (ad) also can adopt the subsection interleaving scheme that is connected in series, as shown in Figure 5; Winding AD also can adopt the segmentation scheme that is connected in parallel, as shown in Figure 8.
Claims (2)
1. secondary side mid point pull-out type Scott wiring transformer is become to become with the T allosteric by fuel tank, radiator and two single-phase transformer M, and the number of turn that M becomes first side winding BC is ω
1, the number of turn that T becomes first side winding AD into
Its D end is connected in the mid point of BC, it is characterized in that, the queen post iron core is adopted in M change and T change, and the mid point f of M change secondary side winding bc extracts the mid point e extraction of T change secondary side winding ad out.
2. secondary side mid point pull-out type Scott wiring transformer according to claim 1 is characterized in that, M becomes and T becomes employing queen post iron core, and winding BC is divided into four sections, and employing is striden the connection of stem interleaved series or is connected in parallel; Winding bc is divided into four sections, and employing is striden the connection of stem interleaved series or is connected in parallel; It is consistent with bc that the arrangement of winding ad keeps; Winding AD is divided into two sections or four sections, and employing is striden stem and is connected in series or is connected in parallel, and mid point is not extracted out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310101801 CN1238872C (en) | 2003-10-17 | 2003-10-17 | Secondary side central-tapped Scott wiring transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310101801 CN1238872C (en) | 2003-10-17 | 2003-10-17 | Secondary side central-tapped Scott wiring transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1529331A CN1529331A (en) | 2004-09-15 |
| CN1238872C true CN1238872C (en) | 2006-01-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310101801 Expired - Fee Related CN1238872C (en) | 2003-10-17 | 2003-10-17 | Secondary side central-tapped Scott wiring transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN1238872C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082022B (en) * | 2009-11-30 | 2012-07-25 | 苏州华电电气股份有限公司 | Multi-frequency multi-ratio transformer |
| CN102930965A (en) * | 2012-11-19 | 2013-02-13 | 江苏宏安变压器有限公司 | Novel T-shaped wiring dry-type transformer with two amorphous alloy cores |
| CN103354157A (en) * | 2013-06-27 | 2013-10-16 | 宜兴市兴益特种变压器有限公司 | Multi-tap Scott split-phase voltage-regulating magnetic voltage regulator |
| KR102195785B1 (en) | 2013-12-20 | 2020-12-28 | 토쿠덴 가부시기가이샤 | Power circuit, iron core for scott connected transformer, scott connected transformer and superheated steam generator |
| CN104575999A (en) * | 2015-01-13 | 2015-04-29 | 正泰电气股份有限公司 | Traction transformer for cophase power supply |
| CN108428537A (en) * | 2018-05-22 | 2018-08-21 | 卧龙电气银川变压器有限公司 | A kind of subway multi output Scott Transformer |
| CN108428538A (en) * | 2018-05-22 | 2018-08-21 | 卧龙电气银川变压器有限公司 | A kind of not equal appearance scott drauqht transformer |
-
2003
- 2003-10-17 CN CN 200310101801 patent/CN1238872C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1529331A (en) | 2004-09-15 |
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