CN105262141A - Electronic traction transformer for cophase power supply of traction power supply system for electrified railway - Google Patents
Electronic traction transformer for cophase power supply of traction power supply system for electrified railway Download PDFInfo
- Publication number
- CN105262141A CN105262141A CN201210091881.3A CN201210091881A CN105262141A CN 105262141 A CN105262141 A CN 105262141A CN 201210091881 A CN201210091881 A CN 201210091881A CN 105262141 A CN105262141 A CN 105262141A
- Authority
- CN
- China
- Prior art keywords
- transformer
- traction
- power
- phase
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Ac-Ac Conversion (AREA)
Abstract
The invention discloses an electronic traction transformer for cophase power supply of a traction power supply system for an electrified railway. Cophase power supply of the traction power supply system is achieved by an electronic traction transformer technology; and the problem of electric energy quality of the electrified railway is thoroughly solved. The electronic traction transformer comprises a primary electronic power transformer (10), a high-frequency traction transformer (20) and a secondary electronic power transformer (30), wherein input three-phase power frequency alternating-current power supply passes through the primary electronic power transformer (10); an output is three-phase high-frequency alternating current; the three-phase high-frequency alternating current generates two-phase low-voltage high-frequency alternating current at a secondary side of the high-frequency traction transformer (20) as a primary side input of the high-frequency traction transformer (20); the two-phase low-voltage high-frequency alternating current passes through the secondary electronic power transformer (30); and the output is a two-phase power frequency alternating-current power supply with equal phases for a traction load.
Description
Technical field
The present invention relates to electric railway traction power supply system, particularly a kind of electric traction transformer for electric railway traction power supply system cophase supply.
Background technology
Electric traction, owing to having high efficiency, low energy consumption, the advantage such as pollution-free, is used widely in the railway of countries in the world, and China's electric railway adopts single phase industrial frequence (50Hz) to exchange 27.5kV power supply system.Traction networks adopts single phase power supply mode, causes electric power system three-phase load unbalance, produces and affect the negative phase-sequence of electric power system; Electric locomotive adopts and exchanges flexible power supply technology, causes electric power system electric current, voltage waveform distortion, produces the harmonic effects to electric power system; Conventional electric power locomotive adopts DC traction motor technology, causes electric power system power factor low, produces reactive power problem; In addition, because traction load changes with differences such as line slope, Transportation Organization, train operation operating modes, power system voltage is caused to fluctuate comparatively violent.Along with the development of power industry, the continuous progress of technology, people more and more pay close attention to the power quality problem that electric railway causes, also form technology and the scheme of many solution electrified railway electric energy quality problems, but all many-sides such as negative phase-sequence, harmonic wave, reactive power, voltage fluctuation are related to due to electrified railway electric energy quality problem, current technology and scheme only for wherein or several, have certain limitation.
China railways tractive power supply system adopts homophase single side feeding mode, traction substation both sides supply arm is usually by traction transformer out of phase power voltage supply, for ensureing to insulate between the supply arm contact line of both sides, insulation sectioning need be set between the supply arm of both sides---electric phase-splitting.When train leads to phase splitting, electric power will be lost in short-term, thus reduce train line handling capacity, train running speed is caused to lose, in order to thoroughly solve the adverse effect of electric neutral section to the railway system, propose to adopt cophase supply mode: namely arrange high-power electric and electronic converting means in traction substation 27.5kV side, the out of phase voltage transformation exported by traction power transformation depressor is the in-phase voltage of same phase, export for contact line, because traction substation both sides supply arm is that in-phase voltage is powered, therefore this place's electricity neutral section can be cancelled, simultaneously, utilize in voltage transformation process, to electricity amplitude, the control of phase place, solve reactive power, the power quality problem such as negative phase-sequence and voltage fluctuation, but cophase supply is due to power electronic device switching frequency and loss problem, solution effect for harmonic wave is unsatisfactory.At present, the first covering device of China is now just tried out at Chengdu-Kunming Railway Line Meishan traction substation.
Along with the development of power electronic technology and material technology, there is novel transformer one electronic power transformer, this transformer is made up of high frequency transformer and converters two core devices, the industrial frequency AC electric energy of input is converted to high-frequency ac electric energy by converters provides high frequency transformer once to input, high frequency transformer secondary exports electric energy and is connected with converters, the high-frequency ac electric energy of output is converted to industrial frequency AC electric energy, for electrical load.Electronic power transformer, while realizing traditional transformer voltage transformation function, completes electricity frequency conversion, the function such as covert.Electronic power transformer has following features: (1) volume is little, lightweight, non-environmental-pollution; (2) can regulate the quality of power supply, control system trend; (3) there is the function of circuit breaker; (4) containing intelligent control unit, the digitlization and the intellectuality that realize electrical network is convenient to.At present, electronic power transformer has few quantifier elimination to apply abroad, and studies in China is still in the starting stage.This technology is applied to electric railway, the high frequency traction transformer that applicable electric railway need be adopted to apply and associate power electronic converter etc., forms the novel electron power transformer one electric traction transformer being applied to electric railway.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of electric traction transformer for electric railway traction power supply system cophase supply, adopt electric traction transformer technology to realize tractive power supply system cophase supply, thoroughly solve electrified railway electric energy quality problem.
The technical solution adopted for the present invention to solve the technical problems is:
Electric traction transformer for electric railway traction power supply system cophase supply of the present invention, it is characterized in that: it comprises primary electron power transformer, high frequency traction transformer and secondary electron power transformer, the three-phase main-frequency AC power of input, through primary electron power transformer, export as three-phase high-frequency alternating current, this three-phase high-frequency ac inputs as the primary side of high frequency traction transformer, two-phase low-voltage high-frequency alternating current is produced at the secondary side of high frequency traction transformer, this two-phase low-voltage high-frequency alternating current is through secondary electron power transformer, the power frequency AC exported as two-phase phase place is equal supplies tractive load.
The invention has the beneficial effects as follows, electric traction transformer is made up of high frequency traction transformer and electronic power transformer, utilize high frequency traction transformer volume little, lightweight, containing the feature of intelligent control unit, reduce traction substation piece of smooth land area, in conjunction with digitlization traction substation technology, intelligentized control method is carried out to high frequency traction transformer, utilize converters that high frequency traction transformer is once connected with secondary side to electric current, voltage waveform, frequency and amplitude control, solve electric railway negative phase-sequence, harmonic wave, reactive power, the power quality problems such as voltage fluctuation, and it is identical for traction substation port of export both sides supply arm voltage-phase to control output, thus while thoroughly solving electrified railway electric energy quality problem, realize cophase supply.
Accompanying drawing explanation
This specification comprises as next width accompanying drawing:
Fig. 1 is the structural representation of the present invention for the electric traction transformer of electric railway traction power supply system cophase supply.
Parts and numbering in figure: primary electron power transformer 10, high frequency traction transformer 20, secondary electron power transformer 30.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
With reference to Fig. 1, the present invention is used for the electric traction transformer of electric railway traction power supply system cophase supply, it comprises primary electron power transformer 10, high frequency traction transformer 20 and secondary electron power transformer 30, the three-phase main-frequency AC power of input, through primary electron power transformer 10, export as three-phase high-frequency alternating current, this three-phase high-frequency ac inputs as the primary side of high frequency traction transformer 20, two-phase low-voltage high-frequency alternating current is produced at the secondary side of high frequency traction transformer 20, this two-phase low-voltage high-frequency alternating current is through secondary electron power transformer 30, the power frequency AC exported as two-phase phase place is equal supplies tractive load.
By the control to primary electron power transformer 10, secondary electron power transformer 30 circuit, thus realize controlling electric current, voltage waveform, frequency and amplitude, solve the power quality problems such as electric railway negative phase-sequence, harmonic wave, reactive power, voltage fluctuation, make output identical for the voltage-phase of traction substation port of export both sides supply arm, thus while thoroughly solving electrified railway electric energy quality problem, realize cophase supply.In figure, primary electron power transformer 10, secondary electron power transformer 30 loop all adopt and hand over orthogonal (AC/DC/AC) loop, there is reasonable isolation effect, as current device and control technology allow, also can adopt friendship, hand over (AC/AC) loop.
The above just explains through diagrams originally for some principles of the electric traction transformer of electric railway traction power supply system cophase supply, be not the present invention to be confined to shown in and in described concrete structure and the scope of application, therefore every corresponding modify of being likely utilized and equivalent, all belong to the scope of the claims that the present invention applies for.
1, for the electric traction transformer of electric railway traction power supply system cophase supply, it is characterized in that: it comprises primary electron power transformer (10), high frequency traction transformer (20) and secondary electron power transformer (30), the three-phase main-frequency AC power of input, through primary electron power transformer (10), export as three-phase high-frequency alternating current, this three-phase high-frequency ac inputs as the primary side of high frequency traction transformer (20), two-phase low-voltage high-frequency alternating current is produced at the secondary side of high frequency traction transformer (20), this two-phase low-voltage high-frequency alternating current is through secondary electron power transformer (30), the power frequency AC exported as two-phase phase place is equal supplies tractive load.
2, as claimed in claim 1 for the electric traction transformer of electric railway traction power supply system cophase supply, it is characterized in that: described primary electron power transformer (10) and secondary electron power transformer (30) adopt cross, straight, return road.
Claims (2)
1. for the electric traction transformer of electric railway traction power supply system cophase supply, it is characterized in that: it comprises primary electron power transformer (10), high frequency traction transformer (20) and secondary electron power transformer (30), the three-phase main-frequency AC power of input, through primary electron power transformer (10), export as three-phase high-frequency alternating current, this three-phase high-frequency ac inputs as the primary side of high frequency traction transformer (20), two-phase low-voltage high-frequency alternating current is produced at the secondary side of high frequency traction transformer (20), this two-phase low-voltage high-frequency alternating current is through secondary electron power transformer (30), the power frequency AC exported as two-phase phase place is equal supplies tractive load.
2., as claimed in claim 1 for the electric traction transformer of electric railway traction power supply system cophase supply, it is characterized in that: described primary electron power transformer (10) and secondary electron power transformer (30) adopt cross, straight, return road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210091881.3A CN105262141A (en) | 2012-03-31 | 2012-03-31 | Electronic traction transformer for cophase power supply of traction power supply system for electrified railway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210091881.3A CN105262141A (en) | 2012-03-31 | 2012-03-31 | Electronic traction transformer for cophase power supply of traction power supply system for electrified railway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105262141A true CN105262141A (en) | 2016-01-20 |
Family
ID=55101697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210091881.3A Pending CN105262141A (en) | 2012-03-31 | 2012-03-31 | Electronic traction transformer for cophase power supply of traction power supply system for electrified railway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105262141A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109435783A (en) * | 2018-10-25 | 2019-03-08 | 中铁二院工程集团有限责任公司 | Negative sequence management system for electric railway traction power supply system AT power supply mode |
| CN112042098A (en) * | 2018-04-16 | 2020-12-04 | 太阳食物有限公司 | Power converter for bioelectrochemical systems |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734914A (en) * | 2005-07-14 | 2006-02-15 | 华中科技大学 | Self-balanced electronic power transformer |
| CN202633969U (en) * | 2012-03-31 | 2012-12-26 | 中铁二院工程集团有限责任公司 | Electronic traction transformer used for cophase supply in electrified railway tractive power supply system |
-
2012
- 2012-03-31 CN CN201210091881.3A patent/CN105262141A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734914A (en) * | 2005-07-14 | 2006-02-15 | 华中科技大学 | Self-balanced electronic power transformer |
| CN202633969U (en) * | 2012-03-31 | 2012-12-26 | 中铁二院工程集团有限责任公司 | Electronic traction transformer used for cophase supply in electrified railway tractive power supply system |
Non-Patent Citations (1)
| Title |
|---|
| 王丹，毛承雄, 陆继明: "基于电子电力变压器的自平衡牵引变压器", 《高电压技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112042098A (en) * | 2018-04-16 | 2020-12-04 | 太阳食物有限公司 | Power converter for bioelectrochemical systems |
| CN109435783A (en) * | 2018-10-25 | 2019-03-08 | 中铁二院工程集团有限责任公司 | Negative sequence management system for electric railway traction power supply system AT power supply mode |
| CN109435783B (en) * | 2018-10-25 | 2023-09-22 | 中铁二院工程集团有限责任公司 | Negative sequence management system for AT power supply mode of electrified railway traction power supply system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202986865U (en) | Single-phase and three-phase combined in-phase power supply and transformation system | |
| CN103311924A (en) | Single-phase combined co-phased power supply and transformation structure | |
| CN102611116B (en) | Single-phase electric energy quality controller for electrified railway power supply system | |
| CN102945736B (en) | A kind of traction power supply numerical control converter plant tractive transformer | |
| CN104477054A (en) | Multi-mode traction drive system and method based on full-power device | |
| CN207697541U (en) | Flexible direct current tractive power supply system is pressed in one kind | |
| CN110165906A (en) | A kind of electric power electric transformer | |
| CN101574935A (en) | Module combined power quality conditioning system for tractive power supply network | |
| CN209676130U (en) | A kind of electric power electric transformer | |
| CN203592908U (en) | Direct current-alternating current traction power supply system | |
| CN202633969U (en) | Electronic traction transformer used for cophase supply in electrified railway tractive power supply system | |
| CN207251209U (en) | A kind of electric power electric transformer | |
| CN204279138U (en) | A kind of many feeder lines compound type is for power transformation structure | |
| CN102963272B (en) | Through cophase power supply system for alternating-current electrified railway | |
| CN105262141A (en) | Electronic traction transformer for cophase power supply of traction power supply system for electrified railway | |
| CN205283150U (en) | Experimental apparatus each other is presented to electric Railway cophase power supply power | |
| CN109256764A (en) | A kind of vehicle-mounted grid-side converter suitable for middle pressure direct-current traction power supply | |
| CN102201744A (en) | Double-chain type high-voltage frequency converter | |
| CN105429176A (en) | Cophase supply power mutual feedback experiment system for electrified railways | |
| CN209159471U (en) | Negative sequence management system for electric railway traction power supply system AT power supply mode | |
| CN109600051A (en) | The through cophase supply device of non-full capacity and its control method | |
| CN106379200B (en) | A kind of cophase supply system based on Vx tractive transformers | |
| CN104242307A (en) | Power transmission connecting structure | |
| CN201685719U (en) | Power van for electrified railway track maintenance vehicles | |
| CN106828201A (en) | A kind of electric railway system of use HVDC contact net |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160120 |
|
| WD01 | Invention patent application deemed withdrawn after publication |