CN207631024U - A kind of three-phase traction power supply system - Google Patents
A kind of three-phase traction power supply system Download PDFInfo
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- CN207631024U CN207631024U CN201721675432.8U CN201721675432U CN207631024U CN 207631024 U CN207631024 U CN 207631024U CN 201721675432 U CN201721675432 U CN 201721675432U CN 207631024 U CN207631024 U CN 207631024U
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Abstract
The utility model provides a kind of three-phase traction power supply system, is related to city rail and main line railway traction power supply field.Main transformer station's secondary side feeds out threephase cable；Threephase cable is parallel with three-phase traction net；Tractive transformer Ti is Y/d wiring, and primary side connects threephase cable, and secondary side connects three-phase traction net；Three-phase traction net is made of the first power rail insulated from each other, the second power rail and rail；Tractive transformer Ti is Y/d wiring, and primary side Y wiring access ABC is identical separate, and three terminals of secondary side d wiring are separately connected the first power rail, the second power rail and rail；Onboard power system is made of vehicle-mounted cable and three-phase AC-DC-AC converter；The first single-core cable of vehicle-mounted cable, the second single-core cable and ground wire respectively through brush and the first power rail, contact by electricity, second single-core cable is through brush and the second power rail and contacts by electricity, ground wire is contacted through brush with rail by electricity, supplies three-phase AC-DC-AC converter and three phase electric machine.
Description
Technical field
The utility model is related to city rails and main line railway traction power supply field.
Background technology
Under power supply capacity (ability) same case, threephase generator, motor, transformer, power transmission line are all more single-phase same
The instantaneous value that material, and simple structure, function admirable, and three phase electric power are more saved in the manufacture and construction of class component is kept
It is invariable, therefore three-phase alternating current industrially has been widely used.
It is appreciated that earliest ideal electric car is an attempt to three phase supply.Early in 18 th century laters, there have been framves in Europe
The trolley line of three overhead lines above electric car has also attempted to be set up in the contact line of two overhead lines power supply above electric car
Road, such as 1771, Siemens and siemens company are between the Li Xite Fields station in Berlin suburbs and military academy
The trolley line of 2 134m one long is built, the same year has been put on display in Paris, FRA International Power exhibition first long again
The trolley line of 400m powered by two aerial condutors.But since three three pole pantographs of overhead lines needs, two make somebody a mere figurehead
The contact structures of line two bipolar pantographs of needs, this overhead line and pantograph are excessively complicated, and reliability, which also becomes, to be difficult to exceed
Obstacle more, the technical barrier of turnout passing, which are used for the practicability of main line railway by serious challenge, therefore gradually in addition
Replaced by low-voltage direct and single-phase ac power supply mode.Unfortunately, the advantage of three-phase alternating current cannot be supplied in rail traction
Due performance is obtained on electricity.
Low-voltage direct and single-phase ac power supply mode have simple in structure, construction cost is low, with and it is easy to maintain etc. excellent
Point, this just determines its advantages for development and does not replace and irreversible status later.
Due to the features such as rate of traffic flow is big, station spacing is short, freight volume is smaller, the city rails such as subway, light rail use always low
Press direct current supply.And main line railway station spacing is long, freight volume is big, since occurring first 27.5kV power frequency single-phase alternating current in the world
Gasify after railway, main line railway just no longer uses low-voltage DC supply mode.
Up to now, the city rails such as subway, light rail still use low-voltage DC supply mode, although direct current supply mode
There is outstanding advantages of no split-phase, power supply is uninterrupted, but the stray electrical current that it is generated can not be ignored really.Stray electrical current pair
The facilities such as bar construction and metal pipe line along the line will all generate electrochemical corrosion in railway roadbed bar construction, tunnel, to influence
The safety and service life of these structures and metallic facility.In this regard, taking drainage protection, the resistance of rail drop, stray electrical current
It collects and pipeline such as applies at the stray current corrosions safeguard procedures outside, have larger fund input, but still cannot be inherently eliminated miscellaneous
Dissipating electric current and its long-term corrosion influences.
In addition, the city rails such as main line railway and subway, light rail are drawn using overhead contact line+rail (rail) form
Net all occupies larger space, needs to increase tunnel cross-section, and then increase difficulty of construction and cost.
Applicant proposed " a kind of rail traffic powered constructions (ZL 201510213833.5) ", and purpose is just to provide one
Kind is laid in compact-sized, the convenient rail traffic powered construction of operation among two rail, can not power off turnout passing, no
Additional occupied space, and it is inherently eliminated stray electrical current and step voltage, the protection person and equipment safety.Before this, applicant
It also proposed " a kind of electric railway coaxial cable power supply system (ZL 201310261240.8) ", it is therefore an objective to which a kind of electricity is provided
Gasify railway coaxial cable power supply system, is mainly used for the single-phase traction power supply of power frequency of main line railway transport and urban track traffic
Field extends power supply arm lengths, avoids or reduces split-phase, keep communications and transportation more smoothly to the maximum extent.It will be clear that this all belongs to
In single-phase ac power supply mode.Single phase electrical power instantaneous value unlike three phase electric power keeps constant constant, but 2 times of power frequencies
Fluctuation.
Applicant also proposed " a kind of rail traffic three-phase alternating-current powered construction (ZL 2,105 2 0275380.0) ", this
Belong to three-phase AC electrical supply system, although can be showed compared with " a kind of rail traffic powered construction (ZL201510213833.5) "
Go out the advantage of three-phase alternating-current powered, but it needs to add Article 3 power rail, and the complexity of contact structures is made to increase, investment also can
Increase.
More than 100 years history and the advantage of three-phase electricity are looked back, dreaming of technical problems to be solved now is：How
Three-phase AC traction power supply is realized in the case where not increasing traction power supply contact structures complexity, makes the advantage of three-phase alternating current
Optimum level is performed in main line railway and city rail, increases power supply capacity (ability) under identical material context,
Material is saved under identical capacity, improves stock utilization；Meanwhile the not additional occupied space of contact structures, passageway can not be powered off
Trouble inhibits stray electrical current well, reduces step voltage.
Total sees, overhead contact line+rail (rail) that the city rails such as existing main line railway and subway, light rail use
Form Traction networks belong to single-phase " one ground of a line " mode, a kind of " electric railway coaxial cable power supply system (ZL
201310261240.8) contact structures " also belong to single-phase " one ground of a line " mode, a kind of " rail traffic powered construction (ZL
201510213833.5) " belong to single-phase " two lines " mode, a kind of " rail traffic three-phase alternating-current powered construction (ZL 2,105 2
0275380.0) " belong to three-phase " three lines " mode, the application will propose that a kind of contact structures belong to the two of three-phase " two lines " mode
Grade (in be pressed onto low pressure) traction power supply scheme.
Utility model content
The purpose of this utility model is to provide a kind of three-phase traction power supply system, it can efficiently solve tractive power supply system
Structural technical problem, can improve power supply capacity or save makes for electric material the advantage of three-phase alternating current be supplied in traction
Optimum level is performed in electricity, and inhibits stray electrical current well, reduces step voltage.
The purpose of this utility model is achieved through the following technical solutions：
A kind of three-phase traction power supply system, including main transformer station, tractive transformer, three-phase traction net and vehicle-mounted power supply system
System, main transformer station's secondary side three-phase bus feed out threephase cable；Threephase cable is arranged in parallel with three-phase traction net；Tractive transformer Ti
Primary side connects threephase cable, and secondary side connects three-phase traction net, i.e. tractive transformer Ti is parallel to threephase cable and three-phase traction net
Between, i=1,2 ... N, N are the number of tractive transformer；Vehicle-mounted power supply system of the way of contact to train is crossed by three-phase traction Netcom
System power supply；
The three-phase traction net is made of the first power rail, the second power rail and rail, the first power rail, the second power rail
It is arranged among rail, below train；
The tractive transformer Ti is Y/d wiring, and three terminals of primary side Y wiring are respectively connected to separate three-phase electricity
Three terminals of cable, secondary side d wiring are separately connected the first power rail, the second power rail and rail.
The onboard power system is made of vehicle-mounted cable and three-phase AC-DC-AC converter；Vehicle-mounted cable is by the first single electricity
Cable and the second single-core cable and ground wire composition；First single-core cable is contacted with the first power rail by electricity through brush, the second single electricity
Cable is contacted with the second power rail through brush by electricity, and ground wire is contacted with rail by electricity through brush；Three-phase AC-DC-AC converter primary side three
A terminal is separately connected the first single-core cable, the second single-core cable and ground wire of vehicle-mounted cable；Three-phase AC-DC-AC converter secondary side
Three terminals are separately connected three terminals of three phase electric machine.
The three-phase AC-DC-AC converter primary side has and can still be run when a phase fault.
The rated voltage of the threephase cable is higher than the rated voltage of three-phase traction net；During the voltage class of threephase cable is
Grade is pressed, the voltage class of three-phase traction net is low pressure grade；Medium pressure level priority selects 27.5k or 35kV or 55kV,
Low pressure level priority selects 3.5kV or 5.5kV or 11kV.
The operation principle of the utility model is：In tractive transformer Ti primary sides, single phase power supply (two cables, corresponding " one kind
Electric railway coaxial cable power supply system, inner wire and outer conductor in ZL 201310261240.8 ") and three phase supply (three
Root cable, the threephase cable of corresponding the application) it compares：If line voltage U is identical, the electric current of every cable of single phase power supply is I1, three
Mutually power every cable electric current be I2If power supply capacity (ability) is identical, i.e.,Then three-phase and
Single phase power supply cable need to the ratio between material beI other words in power supply capacity (ability)
Under same case, three phase supply cable only needs the material of single phase power supply cable 86.6%.In tractive transformer Ti secondary sides, the application
Three-phase traction net is made of the first power rail, the second power rail, rail, and a kind of " rail traffic powered construction
(ZL201510213833.5) " single-phase Traction networks are made of power rail and return current rail, in comparison, present invention take advantage of that rail
Conductive capability, if every conductor material therefor (section) is identical, i.e., electric current is all I, and it is identical also to set line voltage U, then, And power supply capacity=UI of single-phase Traction networks, that is, the power supply capacity ratio of three-phase traction net
It is single-phase big by 73.2%.
The wave impedance of current supply circuit reduces as distribution capacity increases, and increases as distributed reactance increases.Due to electricity
The relative dielectric constant of cable insulating materials is high, and up to 4~5, cable loop arrangement is close, and distribution capacity greatly increases, and cable
Circuit arrangement closely increases also its mutual inductance, or even approach self-induction, and since the size of current in circuit is equal, direction is on the contrary, wait
Effect distribution induction reactance substantially reduces, therefore the wave impedance of cable is much smaller than overhead line, typically about 1/6th of overhead line, and supplies
The natural power of electrical circuit is inversely proportional with its wave impedance, therefore the ability to transmit electricity of cable is approximately equivalent to identical voltage class overhead line
Or six times of contact net.
Define nearest two tractive transformers where train and its between three-phase traction net be short loop, the short loop
The doublet of threephase cable and its three-phase traction net to main transformer station is long circuit.If tractive transformer no-load voltage ratio (threephase cable
With the voltage ratio of three-phase traction net) it is k, the impedance of three-phase traction net reduction to threephase cable side is the k of its famous value2Times, it can
See, other than short loop undertakes the train load, the threephase cable in long circuit will undertake main power supply task, and the three of long circuit
Phase Traction networks only undertake seldom power supply task.For example, threephase cable rated voltage is selected as 35kV, three-phase traction net rated voltage
It is selected as 3.5kV, then k=10, k2=100, then the power supply task that the cable in long circuit is undertaken is about 99%, and the three-phase in long circuit is led
The power supply task for drawing net load is about 1%, meanwhile, although it is ground connection that three-phase traction net, which has a phase (rail), in addition to short loop arranges
Vehicle electric current will produce component (stray electrical current) in certain ground, and outside, component is few in the ground in long circuit, is less than 1%, therefore can be with
Inhibit stray electrical current and step voltage well.
Compared with prior art, the utility model has the beneficial effects that：
One, in tractive transformer Ti primary sides, under power supply capacity (ability) same case, three phase supply cable only needs single-phase
The material of service cable 86.6%, in tractive transformer Ti secondary sides, if every conductor material therefor (section) is identical, three-phase traction
The power supply capacity of net is bigger by 73.2% than single-phase；
Two, the threephase cable in long circuit undertakes main power supply task, and the three-phase traction net in long circuit only undertakes seldom confession
Electric task, while stray electrical current and step voltage can be inhibited well.
Three, main transformer station does not generate negative-sequence current in power grid；
Four, reliability is high, and a phase fault can still be run；
Five, technologically advanced, reliable, operation is convenient.
Description of the drawings
Fig. 1 is the three-phase traction power supply system structural schematic diagram of the utility model embodiment.
Fig. 2 is the onboard power system structural schematic diagram of the utility model embodiment.
Specific implementation mode
The utility model will be further described with reference to the accompanying drawings and detailed description.
Fig. 1 shows that a kind of specific implementation mode of the utility model is：A kind of three-phase traction power supply system, including main transformer
Electric institute, threephase cable, tractive transformer, three-phase traction net, onboard power system etc.；Main transformer station's secondary side three-phase bus 1 is fed out
Threephase cable 2；Threephase cable 2 is parallel with three-phase traction net 3；Tractive transformer Ti primary sides connect threephase cable 2, secondary side connection three
Phase Traction networks 3, i.e. tractive transformer Ti are parallel between threephase cable 2 and three-phase traction net 3, i=1, and 2 ... N, N are traction
The number of transformer；Onboard power system 4 of the three-phase traction net 3 by the way of contact to train is powered.
The three-phase traction net 3 is made of the first power rail 3a, the second power rail 3b and rail 3c；First power rail
3a, the second power rail 3b are mounted between two rail, below train, the first power rail 3a, the second power rail 3b and steel
Rail 3c is insulated from each other, and the first power rail 3a, the second power rail 3b are supported with insulating materials.
The tractive transformer Ti is Y/d wiring, and three terminals of primary side Y wiring are respectively connected to separate three-phase electricity
Three terminals of cable, secondary side d wiring are separately connected the first power rail 3a, the second power rail 3b and rail 3c.
The rated voltage of the threephase cable 2 is higher than the rated voltage of three-phase traction net 3；The voltage class of threephase cable 2
Voltage class for middle pressure grade, three-phase traction net (3) is low pressure grade；Medium pressure level priority selects 27.5k or 35kV
Or 55kV, the 3.5kV or 5.5kV or 11kV that low pressure level priority is selected.
The onboard power system 4 includes vehicle-mounted cable 5 and three-phase AC-DC-AC converter 6.
Fig. 2 is the onboard power system structural schematic diagram of embodiment, and the onboard power system 4 is by vehicle-mounted cable 5 and three
Phase AC-DC-AC converter 6 forms；Vehicle-mounted cable 5 is made of the first single-core cable 5a and the second single-core cable 5b and ground wire 5c；The
One single-core cable 5a is contacted with the first power rail 3a by electricity through brush 7, and the second single-core cable 5b is through brush 7 and the second power rail 3b
By electricity, ground wire 5c is contacted with rail 3c by electricity through brush 7 for contact；Three-phase AC-DC-AC converter 6 primary side, three terminals are separately connected
The first single-core cable 5a, the second single-core cable 5b and the ground wire 5c of vehicle-mounted cable 5；6 secondary side of three-phase AC-DC-AC converter, three ends
Son is separately connected three terminals of three phase electric machine 8.
6 primary side of three-phase AC-DC-AC converter has and can still be run when a phase fault.
Claims (4)
1. a kind of three-phase traction power supply system, including main transformer station, tractive transformer, three-phase traction net and onboard power system,
It is characterized in that:Main transformer station's secondary side three-phase bus (1) feeds out threephase cable (2)；Threephase cable (2) and three-phase traction net (3)
It is arranged in parallel；Tractive transformer Ti primary sides connect threephase cable (2), and secondary side connects three-phase traction net (3), i.e. tractive transformer Ti
It is parallel between threephase cable (2) and three-phase traction net (3), i=1,2 ... N, N are the number of tractive transformer；Three-phase traction
Net (3) is powered by the way of contact to onboard power system (4)；
The three-phase traction net (3) is made of the first power rail (3a), the second power rail (3b) and rail (3c), the first power rail
It is intermediate that (3a), the second power rail (3b) are arranged in rail (3c)；
The tractive transformer Ti is Y/d wiring, and three terminals of primary side Y wiring are respectively connected to separate threephase cable,
Three terminals of its secondary side d wiring are separately connected the first power rail (3a), the second power rail (3b) and rail (3c).
2. a kind of three-phase traction power supply system according to claim 1, it is characterised in that:The onboard power system (4)
It is made of vehicle-mounted cable (5) and three-phase AC-DC-AC converter (6)；Vehicle-mounted cable (5) is single by the first single-core cable (5a) and second
Core cable (5b) and ground wire (5c) composition；First single-core cable (5a) is contacted with the first power rail (3a) by electricity through brush (7), the
Two single-core cables (5b) are contacted with the second power rail (3b) through brush (7) by electricity, and ground wire (5c) connects through brush (7) and rail (3c)
It touches by electricity；Three terminals of three-phase AC-DC-AC converter (6) primary side be separately connected vehicle-mounted cable (5) the first single-core cable (5a),
Second single-core cable (5b) and ground wire (5c)；Three terminals of three-phase AC-DC-AC converter (6) secondary side are separately connected three phase electric machine (8)
Three terminals.
3. a kind of three-phase traction power supply system according to claim 2, it is characterised in that:The three-phase AC-DC-AC converter
(6) primary side has and can still be run when a phase fault.
4. a kind of three-phase traction power supply system according to claim 1, it is characterised in that：The electricity of the threephase cable (2)
Pressure grade is middle pressure grade, and the voltage class of three-phase traction net (3) is low pressure grade；Medium pressure level priority selects 27.5k
Or 35kV or 55kV, low pressure level priority select 3.5kV or 5.5kV or 11kV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721675432.8U CN207631024U (en) | 2017-12-05 | 2017-12-05 | A kind of three-phase traction power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721675432.8U CN207631024U (en) | 2017-12-05 | 2017-12-05 | A kind of three-phase traction power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207631024U true CN207631024U (en) | 2018-07-20 |
Family
ID=62855506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721675432.8U Withdrawn - After Issue CN207631024U (en) | 2017-12-05 | 2017-12-05 | A kind of three-phase traction power supply system |
Country Status (1)
| Country | Link |
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| CN (1) | CN207631024U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107962982A (en) * | 2017-12-05 | 2018-04-27 | 西南交通大学 | A kind of three-phase traction electric power system |
| CN109532569A (en) * | 2019-01-09 | 2019-03-29 | 西南交通大学 | A kind of four rail electric power supply control system of short stator magnetic-levitation train |
| WO2020143188A1 (en) * | 2019-01-09 | 2020-07-16 | 西南交通大学 | Three-rail power supply control system for short-stator train |
| CN113799663A (en) * | 2021-11-19 | 2021-12-17 | 西南交通大学 | Power supply transmission system of bullet train, alternating current, direct current and alternating current traction converter and control method of alternating current, direct current and alternating current traction converter |
-
2017
- 2017-12-05 CN CN201721675432.8U patent/CN207631024U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109532569A (en) * | 2019-01-09 | 2019-03-29 | 西南交通大学 | A kind of four rail electric power supply control system of short stator magnetic-levitation train |
| WO2020143188A1 (en) * | 2019-01-09 | 2020-07-16 | 西南交通大学 | Three-rail power supply control system for short-stator train |
| JP2022517972A (en) * | 2019-01-09 | 2022-03-11 | 西南交通大学 | 4-rail power supply control system for short stator type magnetic levitation trains |
| JP7416806B2 (en) | 2019-01-09 | 2024-01-17 | 西南交通大学 | Four-rail power supply control system for short stator type magnetic levitation railway |
| CN113799663A (en) * | 2021-11-19 | 2021-12-17 | 西南交通大学 | Power supply transmission system of bullet train, alternating current, direct current and alternating current traction converter and control method of alternating current, direct current and alternating current traction converter |
| CN113799663B (en) * | 2021-11-19 | 2022-03-04 | 西南交通大学 | Power supply transmission system of bullet train, alternating current, direct current and alternating current traction converter and control method of alternating current, direct current and alternating current traction converter |
| WO2023088302A1 (en) * | 2021-11-19 | 2023-05-25 | 西南交通大学 | Power car power supply transmission system, ac-dc-ac traction converter, and control methods thereof |
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Granted publication date: 20180720 Effective date of abandoning: 20231013 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180720 Effective date of abandoning: 20231013 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |