CN203920466U - A kind of electrified railway coaxial cable power supply system - Google Patents
A kind of electrified railway coaxial cable power supply system Download PDFInfo
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- CN203920466U CN203920466U CN201420324552.3U CN201420324552U CN203920466U CN 203920466 U CN203920466 U CN 203920466U CN 201420324552 U CN201420324552 U CN 201420324552U CN 203920466 U CN203920466 U CN 203920466U
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- coaxial cable
- contact system
- power supply
- traction transformer
- traction
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- 239000004020 conductor Substances 0.000 claims abstract description 15
- 238000004804 winding Methods 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 5
- 230000011218 segmentation Effects 0.000 claims description 5
- 238000009422 external insulation Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 abstract description 2
- 230000013011 mating Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 7
- 230000007935 neutral effect Effects 0.000 description 7
- 238000000819 phase cycle Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
An electrified railway coaxial cable power supply system, consists of center traction substation, coaxial cable, traction transformer and contact system, rail, circuit breaker etc.; Center traction substation connecting coaxial cable; Coaxial cable is parallel with contact system to be set up; Traction transformer is that single-phase wiring also distributes along coaxial cable and contact system at regular intervals, and its former limit winding is connected between the inner wire and outer conductor of coaxial cable, and secondly limit winding is connected between contact system and rail; By adjacent traction transformer, inner conductor is in parallel with contact system, coaxial cable outer conductor is in parallel with rail; Power supply capacity and the voltage levvl of the utility model system mainly determine by coaxial cable, is suitable for mating of coaxial cable and the various voltage classs of contact system, is conducive to the light-duty suspension of contact system and the raising of overall quality; Coaxial cable sets up along railway or subway tunnel, does not additionally take corridor, can reduce railway and utility network interface, saves external power supply investment, is convenient to management.
Description
Technical field
The utility model relates to a kind of electrified railway coaxial cable power supply system, particularly the single-phase traction power supply of the power frequency field of main line railway transportation and urban track traffic.
Background technology
That monophase system has is simple in structure, construction cost is low, utilization and the advantage such as easy to maintenance, and having determined generally to adopt in electrified railway the power frequency single phase alternating current of taking from utility network is train (tracted load) power supply.For making single-phase tracted load mean allocation as far as possible in three-phase utility network, electrified railway adopts the scheme of rotation phase sequence, phase-splitting switched-mode power supply.Between the adjacent service area at phase-splitting subregion place, with neutral section insulator, cut apart, form electric phase-splitting, also claim phase-splitting.But these phase-splittings are restricting the good performance of electrified railway preceence, because phase-splitting will cause power supply breakpoint, affect the lasting performance of train traction power, be again weakness mechanically, affect system reliability.
It is of living in that phase-splitting is located at junction and the subregion between two traction substations of two feeding sections of traction substation outlet conventionally, in other words, generally in average each traction substation administrative area, has two phase-splittings.For preventing that electric locomotive is charged, by phase-splitting, occur to burn out overhead contact line parts because of arcing, even cause the accidents such as phase fault, continuous rising along with train speed, driver, cannot manually move back level, close auxiliary unit, sub-main break road device, by train inertia cross neutral section, again co-host break road device, close auxiliary unit, enter level restoration tractive output and completed phase-splitting in the situation that, people have developed automatic passing over of neutral section technology.It is several that automatic passing over of neutral section technology mainly contains the ground switch automatic passing over of neutral section etc. that automatically switched on phase-splitting, vehicle-mounted automatic passing over of neutral section and post, but still there is the electric process of transient state that in switching over, train leads to phase splitting, easily produce larger switching surge or excess current, cause the accidents such as traction net and mobile unit scaling loss, even cause automatic passing over of neutral section operation failure, affect power supply reliability and safe train operation.Therefore, phase-splitting remains the weakest link in whole tractive power supply system, is the bottleneck of high speed railway and even the power supply of whole electric railway traction.
Obviously, eliminating the dysgenic basic behave of phase-splitting is to cancel phase-splitting.Research shows, adopts cophase supply technology can cancel the phase-splitting in substation exit, adopts novel two way feeding technology can cancel the residing phase-splitting of subregion.Also it is also noted that simultaneously, traction substation is implemented when phase-splitting is cancelled in cophase supply to administer negative phase-sequence, the degree of administering is as the criterion with GB, and the key of section post enforcement two way feeding is to reduce consequent euqalizing current, but being reduced to which kind of degree there is no at present standard and can follow, that is to say, can implement two way feeding also to be studied.Therefore, in the situation that a length of line is given, how extending to greatest extent feeding section length, as the feeding section of tens kilometers of electrified railways is at present extended to more than 200 kilometers, is also effective behave of avoiding or reducing phase-splitting.In other words, traction substation is implemented cophase supply and has been cancelled the phase-splitting in its exit, if the length of two feeding sections in left and right is greater than length of line, phase-splitting is just no longer set on circuit; If the length of two feeding sections in left and right is less than length of line after traction substation enforcement cophase supply, a phase-splitting also to be set on circuit.Another factor is provincial power network, if do not allow railway electricity consumption transprovincially, place, railway span provincial boundaries must arrange phase-splitting.
Extend to greatest extent feeding section length and also help the railway electrification that realizes short of electricity or areas without electricity, as Qinghai-Tibet Platean.
The utility model proposes a kind of electrified railway coaxial cable power supply system, exactly in order to extend to greatest extent feeding section length, avoid or reduce phase-splitting, make communications and transportation more smooth and easy.
Along with the progress of material and manufacturing technology, coaxial cable cost significantly declines, and this has established economic base for the enforcement of this patent.
Utility model content
The purpose of this utility model is to provide a kind of electrified railway coaxial cable power supply system, be mainly used in the single-phase traction power supply of the power frequency field of main line railway transportation and urban track traffic, extend to greatest extent feeding section length, avoid or reduce phase-splitting, make communications and transportation more smooth and easy.
The utility model solves its technical matters, the technical scheme adopting is: a kind of electrified railway coaxial cable power supply system, by center traction substation, coaxial cable, traction transformer and contact system, rail, circuit breaker etc., formed, wherein, coaxial cable is comprised of inner wire, interior insulation, outer conductor, external insulation etc., and traction transformer is single-phase wiring; Center traction substation connecting coaxial cable; Coaxial cable is parallel with contact system to be set up; The former limit of traction transformer winding is connected between the inner wire and outer conductor of coaxial cable, and traction transformer time limit winding is connected between contact system and rail, and wherein, one end of connecting coaxial cable inner wire is Same Name of Ends with the one end that is connected contact system; Traction transformer distributes along coaxial cable and contact system at regular intervals; By adjacent traction transformer, inner conductor is in parallel with contact system, coaxial cable outer conductor is in parallel with rail; Electric train is subject to electricity between contact system and rail.
Center traction substation SS returns administration of power networks above, and center traction substation SS and coaxial cable power supply system thereof are returned railway administration.
Principle of work of the present utility model is: the electric power of the electric train moving between contact system and rail is mainly supplied with by its nearest traction transformer; Traction transformer is by coaxial cable power supply; Coaxial cable is obtained electric power by center traction substation from utility network; The voltage class of coaxial cable is higher than the voltage class of contact system, and power supply capacity is stronger, and power supply distance is longer.
Compared with prior art, the beneficial effects of the utility model are:
One, power supply capacity of the present utility model and voltage levvl are mainly determined by coaxial cable, therefore, are suitable for the matching way of coaxial cable and the various voltage classs of contact system.As electrified railway can be selected 110kV coaxial cable and 27.5kV contact system; The urban track traffic such as subway, light rail can be selected 35kV coaxial cable and 1.1～3.5kV contact system etc.
Two, the utility model standard coaxial cable is undertaken main power supply task, each section of contact system is mainly responsible for the power supply of this section of train, the average current-carrying capacity of contact system reduces greatly, can select thinner contact wire, is conducive to the light-duty suspension of contact system and the raising of overall quality; Meanwhile, coaxial cable power supply can effectively reduce track potential, reduces external electromagnetic interference.
Three, the utility model coaxial cable used can set up along railway or subway tunnel, and unlike air wire, the extra corridor that takies, easy to implement; And, to compare with air wire, coaxial cable power supply ability is stronger, and power supply distance is longer, can reduce railway and utility network interface, saves external power supply investment, is convenient to management.
Four, the utility model technology is reliable, is convenient to implement.
Below in conjunction with the drawings and specific embodiments, the utility model will be further described.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
The specific embodiment
Embodiment
Fig. 1 illustrates, a kind of specific embodiment of the present utility model is: a kind of electrified railway coaxial cable power supply system, by center traction substation SS, coaxial cable, traction transformer TT and contact system T, rail R, circuit breaker etc., formed, wherein, coaxial cable is comprised of inner wire IC, interior insulation, outer conductor OC, external insulation etc., and traction transformer is single-phase wiring; Center traction substation SS passes through circuit breaker G through circuit breaker G
1the coaxial cable that connects left feeding section, through circuit breaker G
2the coaxial cable that connects right feeding section; Coaxial cable is parallel with contact system to be set up; Traction transformer TT
iformer limit winding is connected between the inner wire IC and outer conductor OC of coaxial cable, establishes circuit breaker W
i, traction transformer time limit winding is connected between contact system T and rail R, and wherein, one end of connecting coaxial cable inner wire is Same Name of Ends with the one end that is connected contact system, uses * mark, for ease of traction transformer TT
iwith contact system failure removal and maintenance, electric segmentation S is set
iwith circuit breaker K
iand left circuit breaker K
i1, right circuit breaker K
i2, left circuit breaker K
i1with right circuit breaker K
i2be connected across electric segmentation S
iupper, train can not power-off by electric segmentation S
i; Traction transformer TT
ialong coaxial cable and contact system, distribute at regular intervals, by adjacent traction transformer, inner conductor is in parallel with contact system, coaxial cable outer conductor is in parallel with rail; Electric train LC is subject to electricity between contact system T and rail R.Traction transformer TT
ispacing is generally more than 20km.As traction transformer TT
iwhen spacing is larger, can also during section post P is set
i, to draw little subregion, be more convenient for failure removal and maintenance; I=1,2 ..., n, n is the number of traction transformer on a feeding section.
Center traction substation SS returns administration of power networks above, and center traction substation SS and coaxial cable power supply system thereof are returned railway administration.
Principle of work of the present utility model is: the electric power of the electric train LC moving between contact system T and rail R is mainly supplied with by its nearest traction transformer; Traction transformer is by coaxial cable power supply; Coaxial cable is obtained electric power by center traction substation from utility network ABC.
For electrified railway, the inlet wire ABC of center traction substation SS can choose 220kV utility network as external power supply, selects 110kV coaxial cable and 27.5kV contact system to match simultaneously; For urban track traffics such as subway, light rails, the inlet wire ABC of center traction substation SS can choose 110kV or 220kV utility network as external power supply, selects 35kV coaxial cable and 1.1～3.5kV contact system to match simultaneously.In order to strengthen power supply reliability, can consider coaxial cable 100% standby mode, or two-way coaxial cable parallel running, only when maintenance or fault, exit a road, the part in Huo Yi road.
Claims (4)
1. an electrified railway coaxial cable power supply system, by center traction substation, coaxial cable, traction transformer and contact system, rail, circuit breaker etc., formed, wherein, coaxial cable is comprised of inner wire, interior insulation, outer conductor, external insulation etc., traction transformer is single-phase wiring, it is characterized in that: center traction substation connecting coaxial cable; Coaxial cable is parallel with contact system to be set up; The former limit of traction transformer winding is connected between the inner wire and outer conductor of coaxial cable, and traction transformer time limit winding is connected between contact system and rail, and wherein, one end of connecting coaxial cable inner wire is Same Name of Ends with the one end that is connected contact system; Traction transformer distributes along coaxial cable and contact system at regular intervals; By adjacent traction transformer, inner conductor is in parallel with contact system, coaxial cable outer conductor is in parallel with rail; Electric train is subject to electricity between contact system and rail.
2. a kind of electrified railway coaxial cable power supply system according to claim 1, is characterized in that: the voltage class of coaxial cable is higher than the voltage class of contact system.
3. a kind of electrified railway coaxial cable power supply system according to claim 1, is characterized in that, contact system T arranges electric segmentation S
iwith circuit breaker K
iand left circuit breaker K
i1, right circuit breaker K
i2, left circuit breaker K
i1with right circuit breaker K
i2be connected across electric segmentation S
ion.
4. according to a kind of electrified railway coaxial cable power supply system claimed in claim 1, it is characterized in that: traction transformer TT
ispacing is generally more than 20km; As traction transformer TT
iwhen spacing is larger, can during section post P is set
i, to draw little subregion, be more convenient for failure removal and maintenance; I=1,2 ..., n, n is the number of traction transformer on a feeding section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420324552.3U CN203920466U (en) | 2014-06-17 | 2014-06-17 | A kind of electrified railway coaxial cable power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420324552.3U CN203920466U (en) | 2014-06-17 | 2014-06-17 | A kind of electrified railway coaxial cable power supply system |
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| Publication Number | Publication Date |
|---|---|
| CN203920466U true CN203920466U (en) | 2014-11-05 |
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| CN201420324552.3U Expired - Lifetime CN203920466U (en) | 2014-06-17 | 2014-06-17 | A kind of electrified railway coaxial cable power supply system |
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| CN (1) | CN203920466U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057842A (en) * | 2014-06-17 | 2014-09-24 | 西南交通大学 | Coaxial cable power supply system of electrified railway |
| CN107176063A (en) * | 2017-06-06 | 2017-09-19 | 西南交通大学 | A kind of electric railway external electrical network powered construction |
| CN107962982A (en) * | 2017-12-05 | 2018-04-27 | 西南交通大学 | A kind of three-phase traction electric power system |
-
2014
- 2014-06-17 CN CN201420324552.3U patent/CN203920466U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057842A (en) * | 2014-06-17 | 2014-09-24 | 西南交通大学 | Coaxial cable power supply system of electrified railway |
| WO2015192645A1 (en) * | 2014-06-17 | 2015-12-23 | 西南交通大学 | Electric railway coaxial cable power supply system |
| CN104057842B (en) * | 2014-06-17 | 2017-01-11 | 西南交通大学 | Coaxial cable power supply system of electrified railway |
| CN107176063A (en) * | 2017-06-06 | 2017-09-19 | 西南交通大学 | A kind of electric railway external electrical network powered construction |
| CN107176063B (en) * | 2017-06-06 | 2023-03-24 | 西南交通大学 | Power supply structure of external power grid of electrified railway |
| CN107962982A (en) * | 2017-12-05 | 2018-04-27 | 西南交通大学 | A kind of three-phase traction electric power system |
| CN107962982B (en) * | 2017-12-05 | 2023-10-13 | 西南交通大学 | Three-phase traction power supply system and vehicle-mounted power supply system |
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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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160622 Address after: 610031 Chengdu City, Sichuan Province, No. two North Ring Road, Southwest Jiao Tong University, Patentee after: Southwest Jiaotong University Patentee after: Li Qunzhan Address before: 610031 Chengdu City, Sichuan Province, No. two North Ring Road, Southwest Jiao Tong University, Patentee before: Southwest Jiaotong University |