CN201765932U - Single-phase traction transformer for three-phase VX connection of AT power supply mode - Google Patents
Single-phase traction transformer for three-phase VX connection of AT power supply mode Download PDFInfo
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- CN201765932U CN201765932U CN201020288960XU CN201020288960U CN201765932U CN 201765932 U CN201765932 U CN 201765932U CN 201020288960X U CN201020288960X U CN 201020288960XU CN 201020288960 U CN201020288960 U CN 201020288960U CN 201765932 U CN201765932 U CN 201765932U
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Abstract
The utility model discloses a single-phase traction transformer for the three-phase VX connection of an AT power supply mode. A main body of the single-phase traction transformer for the three-phase VX connection of the AT power supply mode comprises an iron core, a high-voltage winding, a traction winding and a positive feed winding, wherein each winding is respectively sleeved on a main column of the single-phase three-column type iron core; the number of the turns of the traction winding and the number of the turns of the positive feed winding are both the integral multiple of 4, and the traction winding and the positive feed winding are respectively and evenly divided into 4 series branches with the equal number of turns; the two branches of the traction winding and the two branches of the positive feed winding are combined into cylinder type coils which adopt the parallel winding of a plurality of strands of transposed conductors, are separated up and down and are formed by the integrative coiling of two layers; and the high-voltage winding adopts a structure of an incoming line at the middle part. The utility model has reasonable structure and can meet the special requirements of the impedance of a single-phase traction transformer for three-phase VX wiring under a current AT power supply mode that: the impedance is high, Z21 is equal to Z31, and [(3Z21+Z31-Z23-1)/4] is less than 0.45 ohm.
Description
Technical field
The utility model belongs to field transformer, specifically a kind of single-phase traction transformer that is used for high-speed railway AT supply power mode three-phase VX connection.
Background technology
Since 21st century, the high-speed railway cause of China has obtained develop rapidly, and is also fast-developing thereupon as the traction transformer of giving modern electric railway locomotive traction line powering.Traditional AT supply power mode is made up of Scott Connection Traction Transformer and single-phase autotransformer, 55 kilovolts of traction transformer outputs, and the single-phase self-coupling change then is 27.5 kilovolts with 55 kilovolts of step-downs, uses for the traction circuit; The AT supply power mode of current main-stream has been abandoned traditional supply power mode, transfers more succinct, efficient, energy-conservation supply power mode to, promptly realizes three-phase VX wiring fully by two single-phase traction transformer combinations, no longer set a distance installing single-phase autotransformer.The AT supply power mode practical application that two single-phase traction transformer combinations of present this employing realize the VX wiring is proved to be practicable at high speed special railway lines such as Beijing-Shanghai line, military wide lines.
The connection principle of the single-phase traction transformer of three-phase VX wiring as shown in Figure 2 under this AT supply power mode, its main body comprises high pressure winding H, traction winding T and is just presenting winding F, the common rated voltage of high pressure winding H is 220 kilovolts, and have ± 2 * 2.5% non-excitation pressure adjustment tap, traction winding T and the rated voltage of just presenting winding F all are defined as 27.5 kilovolts, drawing winding T and just presenting between the winding F is series relationship, and its junction is drawn with track and linked to each other and ground connection.
The single-phase traction transformer of three-phase VX wiring under this AT supply power mode, according to the characteristics of high-speed railway operation, its operation characteristic and common power transformer have significant difference.Its special character is:
(1) high pressure winding H is to the impedance Z of traction winding T
21Should equal the impedance Z that high pressure winding H aligns feedback winding F
31
(2) be of the influence of the high order harmonic component of limiting transformer, and consider the load impact that locomotive causes at the online frequent start-stop of railway power supply, general exigent short-circuit impedance electrical network; Traction coil volume with single-phase traction transformer is a benchmark, and high pressure winding H is to the impedance voltage percentage Z of traction winding T
21(%) usually more than 10%, this is equivalent to conventional three-phase power transformer and requires impedance greater than 30%, is quite high numerical value;
(3) behind the single-phase autotransformer in the original AT supply power mode of cancellation, the single-phase traction transformer impedance of VX wiring should be satisfied [(3Z under this AT supply power mode
21+ Z
31-Z
23-1)/4]＜the particular design requirement of 0.45 Ω; Z wherein
21Be the impedance ohm value of seeing from traction winding T after the high pressure winding H short circuit, Z
31For after the high pressure winding H short circuit from just presenting the impedance ohm value that winding F sees, Z
23-1 for after the high pressure winding H short circuit from traction winding T with just presenting the impedance ohm value that the series loop two ends of winding F are seen.
Therefore, appropriate design loop construction how, the specific (special) requirements that realizes its impedance at lower cost is single-phase traction transformer design-calculated key problem in technology of three-phase VX wiring under this AT supply power mode to satisfy high-speed railway traction power supply characteristics.
Summary of the invention
The purpose of this utility model is to provide specific (special) requirements that a kind of lower cost realizes its impedance to satisfy the single-phase traction transformer that AT supply power mode three-phase VX connects that is used for of high-speed railway traction power supply characteristics.
The technical solution of the utility model is: a kind of single-phase traction transformer that is used for AT supply power mode three-phase VX connection, its main body comprises iron core, high pressure winding H, draw winding T and just presenting winding F, its improvement is: described traction winding T is divided into the series branch of the numbers of turn such as 4, be followed successively by traction winding first T11 of branch from high to low according to current potential, traction winding second T12 of branch, traction winding the 3rd T21 of branch and traction winding the 4th T22 of branch, describedly just presenting the series branch that winding F is divided into the numbers of turn such as 4, be followed successively by from high to low according to current potential and just presenting winding first F11 of branch, just presenting winding second F12 of branch, just present winding the 3rd F21 of branch and just presenting winding the 4th F22 of branch.
Described traction winding first T11 of branch and traction winding second T12 of branch with described just presenting winding first F11 of branch and just presenting winding the 2nd F12 for adopt the multiply transposed conductor and around and separate up and down, cylindrical layer winding that two-layer one is reeled and made, described traction winding the 3rd T21 of branch and traction winding the 4th T22 of branch with described just presenting winding the 3rd F21 of branch and just presenting winding the 4th F22 of branch for adopt the multiply transposed conductor and around and the cylindrical layer winding made of separation up and down, two-layer one coiling.
Described traction winding T and the equal turn numbers of just presenting winding F, and be 4 integral multiple.
Described high pressure winding H adopts middle part inlet wire structure, is divided into laterally zygomorphic two parts: high pressure top winding H1 and high pressure bottom winding H2.
The described single-phase three pillar type structure that adopts unshakable in one's determination comprises principal post C1 and other post C2, described high pressure winding H, traction winding T and just presenting winding F and all be sleeved on the principal post C1.
From the principal post C1 of iron core, the upper coil that is arranged in order from inside to outside is to draw winding first T11 of branch, draw winding second T12 of branch, just presenting winding the 3rd F21 of branch, just presenting winding the 4th F22 of branch, high pressure top winding H1; From the principal post C1 of iron core, the lower coil that is arranged in order from inside to outside is: just presenting winding second F12 of branch, just presenting winding first F11 of branch, traction winding the 4th T22 of branch, traction winding the 3rd T21 of branch, high pressure bottom winding H2.
The beneficial effects of the utility model are:
(1) the utility model evenly is separated into the top and the bottom symmetrical structure with all coils, and four series branches of traction winding and the staggered in twos separately symmetric arrangement of four series branches of just presenting winding, it is identical to make that the high pressure winding aligns under the feedback winding operational mode the leakage field group shape under the traction winding operational mode and area and high pressure winding, has realized that naturally the high pressure winding equals the high pressure winding to the impedance of drawing winding and aligns the impedance of presenting winding.
(2) the utility model will draw winding and just present winding and be divided into 4 branches on radial, at the high pressure winding traction winding operational mode or high pressure winding are aligned under the feedback winding operational mode, make the high pressure winding to forming the loop construction of height-low-low form between the traction winding (or just presenting winding), changed the shape of leakage field group under these two kinds of operational modes effectively, obviously increase the equivalent leakage field area of leakage field group, helped realizing higher impedance; Simultaneously, also can reduce the device height degree of traction transformer effectively, thereby reduce transportation and assembling height.
(3) the utility model is when the high pressure winding moves drawing winding and just presenting 55 kilovolts of windings that constitute after the series connection of winding, it is approximate that the shape of its leakage field group and high pressure winding align feedback winding operational mode to traction winding operational mode or high pressure winding, the percentage of these three impedances during based on rated capacity is more approaching, and the relation between these three impedance ohm values can satisfy [(3Z
21+ Z
31-Z
23-1)/4]＜the particular design requirement of 0.45 Ω;
(4) the utlity model has good winding process and insulation property; Traction winding and the multiply transposed conductor of just presenting winding and being adopted and around and separate up and down, cylindrical layer winding that two-layer one is reeled and made, after the number of turn of first (the 3rd) branch of intact certain winding of coiling, by the curved nature transition of interlayer " S " directly oppositely coiling be positioned at second (the 4th) branch of outer field same winding; This structure has been widely used in the low pressure winding of superhigh pressure axial split transformer and has been owner's approval.In addition, the traction winding and just presenting winding separately second branch and the connect in series between the 3rd branch not in coil portion finish, finish but externally connect by lead-in wire, thereby the unsteadiness of having avoided carrying out cross-over connection between the top and the bottom of different layers and having brought has improved reliability of insulating properties.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is an elementary diagram of the present utility model;
Fig. 3 for traction winding first T11 of branch in the utility model and just presenting winding second F12 of branch the multiply transposed conductor and around and separate up and down, internal layer expansion exemplary plot that two-layer one is reeled the cylindrical layer winding made;
Fig. 4 for traction winding second T12 of branch in the utility model and just presenting winding first F11 of branch the multiply transposed conductor and around and separate up and down, skin expansion exemplary plot that two-layer one is reeled the cylindrical layer winding made;
Wherein, among Fig. 1: the first and last that " A, X " characterizes the high pressure winding successively brings out head; " * " is end sign of the same name;
" a
1, x
T" first and last that characterizes successively after traction winding first branch and the series connection of second branch brings out head;
" a
T, x
1" first and last that characterizes successively after traction winding the 3rd branch and the series connection of the 4th branch brings out head;
" x
2, a
F" characterize the first and last just presenting after winding first branch and the series connection of second branch successively and bring out head;
" x
F, a
2" characterize the first and last just presenting after winding the 3rd branch and the series connection of the 4th branch successively and bring out head;
" S " refers to the serpentine bending that winding wire is done when layer to layer transition; " L1, L2 " refers to the outside lead-in wire that connects;
Among Fig. 2: " a
1, x
1" first and last that characterizes the traction winding successively brings out head; " x
2, a
2" characterize the first and last just presenting winding successively and bring out head;
Among Fig. 3,4, for ease of by the clear expression of figure, carry out example with " 6 strands of transposed conductors and around, 24 grades of stays, the cylindrical layer winding of separate up and down, two-layer one being reeled and making ".Top and number called after successively: a, b, c, d, e, f around transposed conductor, the bottom and number called after successively around transposed conductor: 1,2,3,4,5,6." P " refers to the hardboard end circle of upper end, and " R " refers to the hardboard end circle of bottom, and its expansion shape is trapezoidal; " Q " refers to that the laminated paper board between the coil of upper and lower part is made, as to pass through stay screens moulding cushion block; " M " refers to the oil clearance stay.
Embodiment
Below contrast accompanying drawing,, the utility model made further specifying by the description of embodiment.
As shown in Figure 1, a kind of single-phase traction transformer that is used for AT supply power mode three-phase VX connection, its main body comprises iron core, high pressure winding H, draw winding T and just presenting winding F, described traction winding T is divided into the series branch of the numbers of turn such as 4, be followed successively by traction winding first T11 of branch from high to low according to current potential, traction winding second T12 of branch, traction winding the 3rd T21 of branch and traction winding the 4th T22 of branch, describedly just presenting the series branch that winding F is divided into the numbers of turn such as 4, be followed successively by from high to low according to current potential and just presenting winding first F11 of branch, just presenting winding second F12 of branch, just present winding the 3rd F21 of branch and just presenting winding the 4th F22 of branch.
Described traction winding first T11 of branch and traction winding second T12 of branch with described just presenting winding first F11 of branch and just presenting winding the 2nd F12 for adopt the multiply transposed conductor and around and separate up and down, cylindrical layer winding that two-layer one is reeled and made, described traction winding the 3rd T21 of branch and traction winding the 4th T22 of branch with described just presenting winding the 3rd F21 of branch and just presenting winding the 4th F22 of branch for adopt the multiply transposed conductor and around and the cylindrical layer winding made of separation up and down, two-layer one coiling.
Described traction winding T and the equal turn numbers of just presenting winding F, and be 4 integral multiple.
Described high pressure winding H adopts middle part inlet wire structure, is divided into laterally zygomorphic two parts: high pressure top winding H1 and high pressure bottom winding H2.
The described single-phase three pillar type structure that adopts unshakable in one's determination comprises principal post C1 and other post C2, described high pressure winding H, traction winding T and just presenting winding F and all be sleeved on the principal post C1.
As shown in Figure 1, from the principal post C1 of iron core, the upper coil that is arranged in order from inside to outside is to draw winding first T11 of branch, draw winding second T12 of branch, just presenting winding the 3rd F21 of branch, just presenting winding the 4th F22 of branch, high pressure top winding H1; From the principal post C1 of iron core, the lower coil that is arranged in order from inside to outside is: just presenting winding second F12 of branch, just presenting winding first F11 of branch, traction winding the 4th T22 of branch, traction winding the 3rd T21 of branch, high pressure bottom winding H2.
Shown in Fig. 3,4, described traction winding first T11 of branch and traction winding second T12 of branch with described just presenting winding first F11 of branch and just presenting winding second F12 of branch for adopt the multiply transposed conductor and around and separate up and down, cylindrical layer winding that two-layer one is reeled and made, described traction winding the 3rd T21 of branch and traction winding the 4th T22 of branch with described just presenting winding the 3rd F21 of branch and just presenting winding the 4th F22 of branch for adopt the multiply transposed conductor and around and the cylindrical layer winding made of separation up and down, two-layer one coiling.The cylindrical layer winding that shown in Fig. 3,4, comes the two-layer one of coiling to reel: the multiply transposed conductor along face of cylinder coiling, is specified among coiling direction such as the figure; Inner coil (traction winding first T11 of branch) is wound on the cardboard cylinder of band oil clearance stay M, bends transition coiling outer coil (traction winding second T12 of branch) by reverse " S " after the number of turn of intact appointment, around the number of turn of intact regulation; Usually establishing oil clearance stay M between two-layer isolates with heat radiation and insulation; Because the traction winding is with just to present winding voltage identical, and in design process according to same Capacity design, so desirable same wire gauge and around the radical and the number of turn, then draw the series branch of winding and constitute laterally zygomorphic structure with the series branch that just presents winding, and the winding method of just presenting winding identical (be behind just feedback winding second F12 of branch of the intact internal layer of coiling oppositely " S " curved transition coiling outer coil just presenting winding first F11 of branch) is separated by moulding cushion block Q between the last inferior division; The upper and lower end portion of every layer line circle integral body installs hardboard end circle P identical with the radial width of coil and hardboard end circle R respectively.The 3rd T21 of branch of described traction winding and the 4th T22 of branch are identical with method shown in the described winding method of just presenting winding strands the 3rd F21 of branch and the 4th F22 of branch and Fig. 3,4.
Shown in Fig. 1,3,4, bend nature by " S " of layer to layer transition between traction winding first T11 of branch and traction winding second T12 of branch and finish and be connected in series; Finish by " S " of layer to layer transition curved nature equally between traction winding the 3rd T21 of branch and traction winding the 4th T22 of branch and be connected in series; Four branches that just presenting winding are as the same.As shown in Figure 1, 2, be connected in series not in coil that portion finishes between traction winding second T12 of branch and traction winding the 3rd T21 of branch, but finish by lead-in wire L1 connection, promptly draw winding second branch's T12 end and lift one's head x in the coil outside
TLift one's head a with the head end of traction winding the 3rd T21 of branch
TFinish series connection by the outside lead connection.In like manner, the end of just presenting winding second F12 of branch is lifted one's head a
FLift one's head x with the head end of just presenting winding the 3rd F21 of branch
FFinish series connection by outside lead L2 connection.
Claims (6)
1. one kind is used for the single-phase traction transformer that AT supply power mode three-phase VX connects, its main body comprises iron core, high pressure winding H, draw winding T and just presenting winding F, it is characterized in that: described traction winding T is divided into the series branch of the numbers of turn such as 4, be followed successively by traction winding first T11 of branch from high to low according to current potential, traction winding second T12 of branch, traction winding the 3rd T21 of branch and traction winding the 4th T22 of branch, describedly just presenting the series branch that winding F is divided into the numbers of turn such as 4, be followed successively by from high to low according to current potential and just presenting winding first F11 of branch, just presenting winding second F12 of branch, just present winding the 3rd F21 of branch and just presenting winding the 4th F22 of branch.
2. the single-phase traction transformer that is used for AT supply power mode three-phase VX connection according to claim 1, it is characterized in that: described traction winding first T11 of branch and traction winding second T12 of branch with described just presenting winding first F11 of branch and just presenting winding the 2nd F12 for adopt the multiply transposed conductor and around and separation up and down, the cylindrical layer winding that two-layer one is reeled and made, described traction winding the 3rd T21 of branch and traction winding the 4th T22 of branch with described just presenting winding the 3rd F21 of branch and just presenting winding the 4th F22 of branch for adopt the multiply transposed conductor and around and separation up and down, the cylindrical layer winding that two-layer one is reeled and made.
3. the single-phase traction transformer that is used for AT supply power mode three-phase VX connection according to claim 1 is characterized in that: described traction winding T and the equal turn numbers of just presenting winding F, and be 4 integral multiple.
4. the single-phase traction transformer that is used for AT supply power mode three-phase VX connection according to claim 1 is characterized in that: described high pressure winding H adopts middle part inlet wire structure, is divided into laterally zygomorphic two parts: high pressure top winding H1 and high pressure bottom winding H2.
5. the single-phase traction transformer that is used for AT supply power mode three-phase VX connection according to claim 4, it is characterized in that: the described single-phase three pillar type structure that adopts unshakable in one's determination, comprise principal post C1 and other post C2, described high pressure winding H, traction winding T and just presenting winding F and all be sleeved on the principal post C1.
6. the single-phase traction transformer that is used for AT supply power mode three-phase VX connection according to claim 5, it is characterized in that: from the principal post C1 of iron core, the upper coil that is arranged in order from inside to outside is to draw winding first T11 of branch, draw winding second T12 of branch, just presenting winding the 3rd F21 of branch, just presenting winding the 4th F22 of branch, high pressure top winding H1; From the principal post C1 of iron core, the lower coil that is arranged in order from inside to outside is: just presenting winding second F12 of branch, just presenting winding first F11 of branch, traction winding the 4th T22 of branch, traction winding the 3rd T21 of branch, high pressure bottom winding H2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020288960XU CN201765932U (en) | 2010-08-03 | 2010-08-03 | Single-phase traction transformer for three-phase VX connection of AT power supply mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020288960XU CN201765932U (en) | 2010-08-03 | 2010-08-03 | Single-phase traction transformer for three-phase VX connection of AT power supply mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201765932U true CN201765932U (en) | 2011-03-16 |
Family
ID=43718541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020288960XU Expired - Fee Related CN201765932U (en) | 2010-08-03 | 2010-08-03 | Single-phase traction transformer for three-phase VX connection of AT power supply mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201765932U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103811159A (en) * | 2012-11-12 | 2014-05-21 | 特变电工股份有限公司 | Four split transformer |
| CN110911129A (en) * | 2019-12-06 | 2020-03-24 | 中车株洲电机有限公司 | Multi-system traction transformer and rail vehicle |
| RU2727157C1 (en) * | 2019-12-26 | 2020-07-21 | Евгений Александрович Клочихин | Transformer for traction substations of alternating current |
-
2010
- 2010-08-03 CN CN201020288960XU patent/CN201765932U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103811159A (en) * | 2012-11-12 | 2014-05-21 | 特变电工股份有限公司 | Four split transformer |
| CN110911129A (en) * | 2019-12-06 | 2020-03-24 | 中车株洲电机有限公司 | Multi-system traction transformer and rail vehicle |
| RU2727157C1 (en) * | 2019-12-26 | 2020-07-21 | Евгений Александрович Клочихин | Transformer for traction substations of alternating current |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 213000 NO. 8, XINFU ROAD, TIANNING DISTRICT, CHANGZHOU CITY, JIANGSU PROVINCE TO: 213021 NO. 8, XINFU ROAD, CHANGZHOU CITY, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110413 Address after: 213021 Jiangsu city in Changzhou Province, the new road No. 8 Patentee after: Jiangsu Sunel Transformer Co., Ltd. Address before: 213000 Jiangsu Province, Changzhou Tianning New Road No. 8 Patentee before: Jiangsu Sunel Transformer Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110316 Termination date: 20170803 |