CN208077752U - A kind of tractive transformer - Google Patents
A kind of tractive transformer Download PDFInfo
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- CN208077752U CN208077752U CN201820613908.3U CN201820613908U CN208077752U CN 208077752 U CN208077752 U CN 208077752U CN 201820613908 U CN201820613908 U CN 201820613908U CN 208077752 U CN208077752 U CN 208077752U
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Abstract
The utility model provides a kind of tractive transformer, belongs to attached wires of AC electrified railway power supply technique field.Including intermediate iron core Y, both sides iron core X1 and iron core X2 and two phase windings, two phase windings are arranged on the iron core X1 and iron core X2 of both sides, tri-phase iron core is located at the effective sectional area that intermediate iron core column Y effective sectional areas are more than both sides iron core column X1 and iron core X2, and specific ratio is determined according to magnetic flux in the distribution of the different magnetic circuits of tri-phase iron core and overlaying relation；Two phase windings are arranged on the iron core of intermediate iron core both sides, four terminals of two phase windings are mutual indepedent inside tractive transformer, two phase winding primary sides access the same line voltage of three-phase electrical power system, tractive transformer is operated in the parallel single-phase mode of connection, the voltage magnitude of two traction ports of its secondary side, phase all same at this time, respectively the traction load power supply of arm a independently-powered to two and supply arm b.
Description
Technical field
The utility model belongs to attached wires of AC electrified railway power supply technique field.
Background technology
As the development of railway operation needs to carry out existing line certain transformation to adapt to the operation demand of variation
And upgrading.In transformation process, inevitably it is related to the replacement to traction substation related facility and adjustment, this also becomes shadow
Ring one of the factor of tractive power supply system operating status.While being transformed to existing traction substation, how to ensure both
The normal operation for having circuit reduces retrofit work amount on the basis of making full use of original equipment, for improving traction power supply
The economy of system operation has great importance.
As the major part for undertaking transformation of electrical energy in tractive power supply system, the state of tractive transformer directly affects traction
The operation of power supply system.The Vv Connection Traction Transformers being widely used at present, when transformer manufacturing, three iron core column sectional area phases
Together.In practical applications, the not line voltage of Vv Connection Traction Transformers primary side access electric system, i.e. three of primary side extraction
Binding post is connected with A, B, C of electric system tri- respectively, and two ports of secondary side export two different line voltages, respectively to two
Mutually independent traction load power supply.
When circuit freight volume increases, and needs to carry out extending capacity reformation to transformer, generally use replaces more capacity transformer
Methods, but economy and non-optimal.It is preferred plan that can carry out extending capacity reformation using existing transformer.As can Vv is connect
Two single-phase winding parallels of line transformer are connected to single-phase transformer use and transformer capacity utilization rate can be improved, and have preferable
Economy.But tri-phase iron core does not consider this working condition, iron core when due to existing Vv Connection Traction Transformers design at present
Magnetic flux may be saturated, transformer cisco unity malfunction, thus existing Vv Connection Traction Transformers do not support it is single-phase by two
Winding parallel connection operation.
Utility model content
The purpose of this utility model is to provide a kind of tractive transformer, it can efficiently solve tractive transformer in specified appearance
Measure it is constant under the premise of, improve system power supply ability the problem of.
The utility model solves above-mentioned technical problem, and used technical solution is：One
A kind of tractive transformer：Including intermediate iron core Y, both sides iron core X1 and iron core X2 and two phase windings, two phase windings
It is arranged on the iron core X1 and iron core X2 of both sides, tri-phase iron core is located at intermediate iron core column Y effective sectional areas and is more than both sides
Four terminals of the effective sectional area of iron core column X1 and iron core X2, two phase windings are mutual indepedent in inside transformer, two phase windings
Primary side accesses the same line voltage of three-phase electrical power system, and tractive transformer is operated in the parallel single-phase mode of connection, at this point, traction becomes
The voltage magnitude of the traction of depressor secondary side two port, phase all same, respectively supply arm a independent to two and supply arm b
Traction load is powered.
The specific ratio of the iron core column Y effective sectional areas of the centre according to magnetic flux tri-phase iron core different magnetic circuits point
With being determined with overlaying relation.The operation principle of the utility model is：
When two phase winding of tractive transformer primary side accesses the identical line voltage of electric system, tractive transformer is operated in simultaneously
Receipts or other documents in duplicate phase operating status, tractive transformer core field distribution at this time is different from Vv Connection Traction Transformer operating statuses, mainly
It is embodied in the size different from of the magnetic flux flowed through in iron core column.Due to the superposition of magnetic flux, interphase iron core column passes through
Magnetic flux when being more than Vv Connection Traction Transformer operating statuses by the magnetic flux of interphase iron core column, it is existing that iron core is likely to occur saturation
As leading to transformer cisco unity malfunction.
Therefore when can be operated in parallel single-phase operating status according to tractive transformer, magnetic flux is in the different magnetic circuits in tri-phase iron core
The relations of distribution and stack result, determine the effective sectional area of interphase iron core column, provided for increased magnetic flux enough logical
Road avoids iron core from magnetic saturation phenomenon occur.The effective sectional area that a phase iron core column need to only be increased simultaneously, for the iron independently manufactured
Stem influences less, compared with the tri-phase iron core of selection effective sectional area bigger, has good economic.
Compared with prior art, the utility model has the beneficial effects that：
One, the utility model can be operated in two states, Vv wiring and parallel single-phase wiring, can both meet railway routine
Demand improves system under the premise of keeping transformer rated capacity constant when also can need extending capacity reformation under freight volume growth pattern
Power supply capacity ensures the normal operation of electric railway circuit.
Two, equipment can be made full use of when the utility model needs extending capacity reformation under freight volume growth pattern, completed both
It is functional while not generating extra-pay, good economy performance.
Three, the utility model can carry out in existing technical foundation, will not improve technologic difficulty.
Four, the utility model is applied in new line construction, can be provided for follow-up power supply system extending capacity reformation a kind of feasible
Solution.
Description of the drawings
Fig. 1 is magnetic flux distribution schematic diagram in the utility model iron core.
Fig. 2 is the utility model core section schematic diagram.
Fig. 3 is external cabling schematic diagram of the utility model works in parallel single-phase operating status.
Specific implementation mode
The utility model will be further described with reference to the accompanying drawings and detailed description for embodiment.
Fig. 1 shows that a kind of specific implementation mode of the utility model is：A kind of electric railway traction transformer, including
Intermediate iron core, both sides iron core X1 and iron core X2 and two phase windings, tri-phase iron core are located at intermediate iron core column Y effective sectional areas
More than the effective sectional area of both sides iron core column X1 and iron core X2, specific ratio according to magnetic flux tri-phase iron core different magnetic circuits point
With being determined with overlaying relation；Two phase windings are arranged on the iron core of intermediate iron core both sides, and four terminals of two phase windings exist
Inside transformer is mutual indepedent.Two phase winding primary sides access the same line voltage of three-phase electrical power system, and tractive transformer is operated in
The parallel single-phase mode of connection, at this point, the voltage magnitude of two traction ports of tractive transformer secondary side, phase all same, right respectively
The traction load power supply of two independently-powered arm a and supply arm b.
Fig. 2 is tri-phase iron core schematic cross-section.The in-between iron core column effective sectional area of tri-phase iron core is more than both sides iron core
The effective sectional area of column.
Fig. 3 is the tractive transformer working condition of the utility model embodiment.Two phase winding of tractive transformer primary side accesses
The same line voltage of electric system, at this time tractive transformer be operated in parallel single-phase operating status, as shown in Figure 3.A, B, C in figure
The three-phase inlet wire of the electric system of traction substation access is respectively represented, a and b are respectively two supply arms, tractive transformer two
A traction port meets supply arm a and supply arm b respectively, is the independent traction load power supply of two-way.
Claims (2)
1. a kind of tractive transformer：Including intermediate iron core Y, both sides iron core X1 and iron core X2 and two phase windings, two phase windings point
It is not arranged on the iron core X1 and iron core X2 of both sides, it is characterised in that：Tri-phase iron core is located at intermediate iron core column Y effective sectional areas
More than the effective sectional area of both sides iron core column X1 and iron core X2, four terminals of two phase windings are mutual indepedent in inside transformer,
Two phase winding primary sides access the same line voltage of three-phase electrical power system, and tractive transformer is operated in the parallel single-phase mode of connection, this
When, the voltage magnitude of the traction of tractive transformer secondary side two port, phase all same, respectively supply arm a independent to two and
The traction load of supply arm b is powered.
2. a kind of tractive transformer according to claim 1, it is characterised in that:The iron core column Y effective cross-sections of the centre
Long-pending specific ratio is determined according to magnetic flux in the distribution of the different magnetic circuits of tri-phase iron core and overlaying relation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820613908.3U CN208077752U (en) | 2018-04-26 | 2018-04-26 | A kind of tractive transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820613908.3U CN208077752U (en) | 2018-04-26 | 2018-04-26 | A kind of tractive transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208077752U true CN208077752U (en) | 2018-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820613908.3U Active CN208077752U (en) | 2018-04-26 | 2018-04-26 | A kind of tractive transformer |
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| CN (1) | CN208077752U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108682541A (en) * | 2018-04-26 | 2018-10-19 | 西南交通大学 | A kind of tractive transformer |
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2018
- 2018-04-26 CN CN201820613908.3U patent/CN208077752U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108682541A (en) * | 2018-04-26 | 2018-10-19 | 西南交通大学 | A kind of tractive transformer |
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