CN100527562C - YNd11 connection transformer based AC electrified railway traction cophase supply device - Google Patents
YNd11 connection transformer based AC electrified railway traction cophase supply device Download PDFInfo
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- CN100527562C CN100527562C CNB2007100503034A CN200710050303A CN100527562C CN 100527562 C CN100527562 C CN 100527562C CN B2007100503034 A CNB2007100503034 A CN B2007100503034A CN 200710050303 A CN200710050303 A CN 200710050303A CN 100527562 C CN100527562 C CN 100527562C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The invention discloses a cophase traction powering device of AC electrified railway based on the YND11 wiring transformer; wherein, the traction transformer of the device is YNd11-connected three-phase transformer (T1). The YN-connected three primary sides, namely A, B and C phases of the transformer (T1) are connected with the common grid system. Three power flow controllers (IC) are arranged between the three d-connected terminals (a, b, c) at low-pressure side of the transformer, and terminal a and terminal b are connected with the electrified railway contacting network (TR). The invention has the advantages that: cophase power supply for the complete railway tracks without split phase can be realized; the voltage of the power supply is stable which ensures that locomotives run with high speed and heavy load; meanwhile, the negative sequence influence, no idle work influence and harmonic wave influence of railway traction load on the common grid system can be eliminated; the invention also has the advantages of low cost and convenient implementation.
Description
Technical field
The present invention relates to a kind of ac electrified railway traction cophase supply device.
Background technology
That single phase system had was simple in structure, construction cost is low, utilization and advantage such as easy to maintenance, had determined that generally adopting the single phase industrial frequence alternating current in electric railway is the railway locomotive power supply.And electric power system wishes that all loads all take three symmetrical fundamental currents from electrical network, and to make full use of equipment, the capacity of circuit reduces the harm to system of reactive current and harmonic current.For satisfying this requirement, electric railway adopts the scheme that phase sequence is rotated, the segmentation phase-splitting is powered, every along the railway 20-25km is as a power supply section, each section is successively respectively by the not cophase supply in the electrical network, split phase segment about 30m is set between each section, and carries out phase-splitting by neutral section.When the locomotive load that moves on each section of powering respectively mutually is identical, just can make the balance of electric power system three-phase load in big scope.
But because the size of the traction load of each section can not be identical at any time, the influence that the phase-splitting segmentation scheme has just alleviated three-phase imbalance does not to a certain extent fundamentally solve the railway influence of single-phase electricity consumption to whole utility network of loading.Electric railway is forced to revise design owing to influence the problem of the quality of power supply, increases investment, and the passive situation of situation happens occasionally.
Simultaneously, because the existence of electric neutral section, when locomotive operation to power supply segment ends, must be through moving back series of complex operations such as level, outage, slide into next section and recover normal operation more item by item, this had both increased the complexity of locomotive operation, had seriously restricted the raising of locomotive running speed and the performance of tractive effort simultaneously again.
For the existing state of China, be badly in need of development high-speed overload railway.The locomotive traction electric power system of existing segmentation phase-splitting is when realizing high speed, heavy loading locomotive traction, and is incompatible more, mainly shows:
At a high speed and heavy haul transport requirement motorcycle pantograph smoothly flowed continuously, and the existence of phase-splitting link, make on the pantograph electric current off and on, this has influenced the speed of service of locomotive greatly.The link of phase-splitting simultaneously also is one of link the weakest in the whole system.Though automatic neutral-section passing device is arranged, frequent because of its voltage height, switching motion, all there are serious problems in its accuracy and reliability, can't solve the adverse effect that electricity divides relative locomotive operation fully.
At a high speed, heavy haul transport all needs the power supply of big capacity, for satisfy in the national standard electric power system to electric railway with the restriction index of negative phase-sequence for the outstanding quality of power supply, the employed reactive power compensation technology of original phase-splitting supply power mode can't adapt to.If adopt adjustable symmetrical compensation technology at traction substation, even use the power supply (disregarding its idle and harmonic wave) of AC-DC-AC on locomotive, because of capacity is bigger, negative phase-sequence is more outstanding, and technology and equal economically difficulty reach perfect condition.
China may be high, the mixed race pattern of middling speed with the high-speed railway of building, use situation with if the locomotive of AC-DC-AC power supply and the locomotive of friendship-straight power supply occur, except that negative phase-sequence, idle and harmonic wave still exists, the quality of power supply can not be improved, and has restricted railway and electric power both sides' development.
Summary of the invention
Purpose of the present invention just provides a kind of ac electrified railway traction cophase supply device based on the YNd11 wiring transformer, this device can be realized railway cophase supply completely and need not phase-splitting, and supply power voltage is stable, guarantee high speed, the stable operation of locomotive, be particularly useful for high speed, heavy haul railway use; This device can be eliminated the rail traction load simultaneously to the negative phase-sequence of utility network electric energy, idle and harmonic effects, and cost is low, enforcement is convenient.
The present invention solves its technical problem, and the technical scheme that is adopted is:
A kind of ac electrified railway traction cophase supply device based on the YNd11 wiring transformer, its design feature is: traction transformer is the three-phase transformer of YNd11 connection, three former limits three of the YN connection of this transformer high pressure utility network that joins, three terminals of low-pressure side of this transformer d connection link to each other with three current output terminals of flow controller, and two terminals wherein connect contact nets in electrified railways simultaneously.
Operation principle of the present invention is: with the three-phase high-voltage on the public high-voltage fence, after the traction transformer conversion of YNd11 connection, two terminals of its low-pressure side are received the railway contact line, to the electric locomotive power supply, realize single phase power supply.Simultaneously because three terminals of the low-pressure side of traction transformer connect the current output terminal of flow controllers, the three-phase current of traction transformer time limit being exported by the current detecting and the PDM keyer of flow controller
With the electric current that flows through on the railway contact line
Detect, computing, determine the output current of three current output terminals of flow controller
Size, thus when guaranteeing the unidirectional power supply of railway contact line, also guarantee index transformer time limit three-phase current
Symmetry and do not have a harmonic wave.
Compared with prior art, the invention has the beneficial effects as follows:
One, all use the electric substation of apparatus of the present invention all to export same single-phase voltage to power to railway locomotive on the railway line, need not to adopt on the whole like this railway line phase sequence by turns, the phase-splitting sectional power supply, fundamentally avoided electric phase-splitting link; Both made locomotive operation reliable, make again locomotive can be at a high speed, stable operation, be particularly useful for heavy duty, bullet train.
Two, compensate by the electric current of flow controller, guarantee index transformer time limit three-phase current traction transformer time limit
Symmetry and do not have a harmonic wave, thus realize the three symmetrical power takings from the utility network of rail traction load, avoided former phase-splitting power taking to produce negative-sequence current, have a strong impact on the problem of the electrical network quality of power supply; Simultaneously, also eliminate a large amount of idle composition of rail traction load and harmonic wave, the economy of railway and electric power system and safe and reliable operation are guaranteed the influence of the utility network quality of power supply.
Three, the traction substation of the existing rail track of China adopts YNd11 star-delta connection transformer in a large number, it is transformed can constitute YNd11 star of the present invention-delta connection transformer cophase supply device.Therefore, electric power system has adaptability the most widely to apparatus of the present invention to China railways, and it is convenient, low to the improvement cost of existing railway to implement.
Consisting of of above-mentioned flow controller: the former limit of the triphase step-down transformer of YY wiring links to each other with three-phase transformer d connection low-pressure side terminal, in the step-down transformer time limit three-phase: a ', b ' two-phase link to each other with current output terminal x, the y of electronic power switch D1; B ', c ' two-phase link to each other with current output terminal y, the z of electronic power switch D2; C ', a ' two-phase link to each other with current output terminal z, the x of electronic power switch D3; Each electronic power switch D1, D2, D3 comprise four high power transistors, and the control of every high power transistor extremely all links to each other with PDM keyer with current detecting; Four high power transistors constitute two groups of high power transistor groups by emitter and collector electrode polyphone in twos, the collector electrode parallel connection of two groups of high power transistor groups, and emitter is also in parallel; And at the collector electrode of two groups of high power transistor groups, the parallel connection direct storage capacitor of emitter; Two groups of emitter and the concatenation points formation electronic power switch D1 of collector electrode or current output terminal x, y or y, z or z, x of D2 or D3 that the high power transistor group is interior.
Like this, under the control of current detecting and PDM keyer, the on off state of wheel current control three electronic power switches, and after the step-down transformer conversion is to the inferior limit of the traction transformer three-phase electric current that affords redress
Make the electric current of three limit outputs of traction transformer
Symmetry and do not have harmonic wave satisfies the requirement to negative phase-sequence, idle and harmonic wave of utility network.The flow controller of this structure, control is effective, and simple in structure, cost is low.
Parallel connection direct storage capacitor between above-mentioned two groups of high power transistor groups collector electrode of not connecting and the emitter of not connecting.Storage capacitor in parallel can effectively compensate traction transformer time limit port lagging reactive power, improve power factor, stablize the voltage on the former limit of traction transformer, the high order harmonic component in the filtering load current.
Above-mentioned high power transistor is integral gate change transistor or insulated gate bipolar transistor.These two kinds of pipes are the high-power electric and electronic switching tube of mature and reliable.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the circuit theory schematic diagram of the embodiment of the invention.
Fig. 2 is the circuit theory schematic diagram of an electronic power switch D1 in the embodiment of the invention flow controller.
Embodiment
Embodiment
Fig. 1 illustrates, and a kind of embodiment of the present invention is: a kind of ac electrified railway traction cophase supply device based on the YNd11 wiring transformer.Traction transformer is the three-phase transformer T1 of YNd11 connection, three former limit A, B, C three of the YN connection of this transformer T1 high pressure utility network that joins, low-pressure side three terminal a, b of this transformer d connection, c link to each other with three current output terminals of flow controller IC, and wherein two terminal a, b connect railway contact line TR simultaneously.Obviously, output a, the b of three low-pressure sides of the present invention, c are identical, both can select two terminals of a, b to link to each other with railway contact line TR as shown in Figure 1, also can select b, c or a, two terminals of c to link to each other with contact nets in electrified railways TR.
The flow controller IC that this is routine consists of: the former limit of the triphase step-down transformer T2 of YY wiring links to each other with three-phase transformer d connection low-pressure side terminal a, b, c, and a ', the b ' in T2 limit three-phase of step-down transformer and b ', c ' and c ', a ' two-phase link to each other with z, x with y, z with corresponding electronic power switch D1 and current output terminal x, the y of D2 and D3 respectively.
Fig. 2 illustrates, and electronic power switch D1 comprises four high power transistor BG, and the control of every high power transistor BG extremely all links to each other with PDM keyer CP; Four high power transistor BG connect with collector electrode by emitter in twos and constitute two groups of high power transistor groups, the not collector electrode parallel connection of series connection of two groups of high power transistor groups, and Chuan Lian emitter is not in parallel yet; Emitter in two groups of high power transistor groups and the series connection point of collector electrode formation electronic power switch D1 current output terminal x, y.Formation and the D1 of electronic power switch D2, D3 are identical, and just the current output terminal of electronic power switch D2, D3 is labeled as y, z and z, x at Fig. 1 respectively.
Parallel connection direct storage capacitor C between two groups of high power transistor the groups collector electrode of not connecting and emitters of not connecting.
Fig. 2 illustrates, and the high power transistor BG that this example adopts is integral gate change transistor (I (GCT); When reality is implemented, also can adopt insulated gate bipolar transistor (IGBT).
Claims (4)
1, a kind of ac electrified railway traction cophase supply device based on the YNd11 wiring transformer is characterized in that:
Traction transformer is the three-phase transformer (T1) of YNd11 connection, three former limits (A, B, C) three of the YN connection of this transformer (T1) high pressure utility network that joins, three terminals of low-pressure side (a, b, c) of this transformer d connection link to each other with three current output terminals of flow controller (IC), and two terminals (a, b) wherein connect contact nets in electrified railways (TR) simultaneously.
2, a kind of ac electrified railway traction cophase supply device as claimed in claim 1 based on the YNd11 wiring transformer, it is characterized in that: described flow controller (IC) consists of:
The former limit of the triphase step-down transformer of YY wiring (T2) links to each other with three-phase transformer d connection low-pressure side terminal (a, b, c); In the three-phase of the inferior limit of step-down transformer (T2): a ', b ' two-phase link to each other with current output terminal x, the y of electronic power switch D1; B ', c ' two-phase link to each other with current output terminal y, the z of electronic power switch D2; C ', a ' two-phase link to each other with current output terminal z, the x of electronic power switch D3;
Each electronic power switch D1, D2, D3 comprise four high power transistors (BG), and the control of every high power transistor (BG) extremely all links to each other with PDM keyer (CP) with current detecting; Four high power transistors (BG) are connected with collector electrode by emitter in twos and are constituted two groups of high power transistor groups, the not collector electrode parallel connection of series connection of two groups of high power transistor groups, and Chuan Lian emitter is not in parallel yet; Two groups of emitter and the series connection point formation electronic power switch D1 of collector electrode or current output terminal x, y or y, z or z, x of D2 or D3 that the high power transistor group is interior.
3, a kind of ac electrified railway traction cophase supply device based on the YNd11 wiring transformer as claimed in claim 2 is characterized in that: parallel connection direct storage capacitor (C) between described two groups of high power transistor groups collector electrode of not connecting and the emitter of not connecting.
4, a kind of ac electrified railway traction cophase supply device based on the YNd11 wiring transformer as claimed in claim 2, it is characterized in that: described high power transistor (BG) is integral gate change transistor or insulated gate bipolar transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100503034A CN100527562C (en) | 2007-10-22 | 2007-10-22 | YNd11 connection transformer based AC electrified railway traction cophase supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100503034A CN100527562C (en) | 2007-10-22 | 2007-10-22 | YNd11 connection transformer based AC electrified railway traction cophase supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101183792A CN101183792A (en) | 2008-05-21 |
| CN100527562C true CN100527562C (en) | 2009-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100503034A Expired - Fee Related CN100527562C (en) | 2007-10-22 | 2007-10-22 | YNd11 connection transformer based AC electrified railway traction cophase supply device |
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Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008012325A1 (en) * | 2008-03-03 | 2009-09-10 | Siemens Aktiengesellschaft | Device for connecting a single-phase supply line to a three-phase supply network |
| CN101348081B (en) * | 2008-07-01 | 2011-04-13 | 龚秋声 | Three-phase AC tramcar |
| CN101856979B (en) * | 2010-05-26 | 2013-02-06 | 许继集团有限公司 | Electrified railway in-phase power supply device |
| CN102193541B (en) * | 2011-03-17 | 2013-03-20 | 许继集团有限公司 | Monitoring platform of in-phase power supply device of electric railway |
| CN102729841B (en) * | 2012-07-03 | 2015-04-01 | 南车株洲电力机车研究所有限公司 | Power supply arm wiring system and anchor articulated type split-phase system |
| CN103078315B (en) * | 2012-12-28 | 2014-08-13 | 西南交通大学 | Single-phase and three-phase combined in-phase power supply and transformation device |
| CN103904636B (en) * | 2014-02-28 | 2015-09-23 | 株洲变流技术国家工程研究中心有限公司 | A kind of DC traction power-supply system based on flexible DC power transmission |
| CN104852387B (en) * | 2015-05-11 | 2017-06-13 | 西南交通大学 | A kind of active compensation cophase supply system based on modularization cascaded H-bridges |
| CN109861367B (en) * | 2017-11-30 | 2021-04-23 | 株洲中车时代电气股份有限公司 | Power supply system of electric locomotive |
| CN109215977B (en) * | 2018-09-12 | 2023-09-29 | 西南交通大学 | Traction-compensation transformer |
| 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 |
| CN110504692B (en) * | 2019-08-27 | 2022-10-21 | 西南交通大学 | Unified power flow control system and method for photovoltaic energy storage traction power supply of urban rail transit |
| CN110517873B (en) * | 2019-09-30 | 2024-03-26 | 西南交通大学 | Traction-compensation transformer |
| CN110635482B (en) * | 2019-11-08 | 2023-02-03 | 西南交通大学 | Single-phase combined transformer power supply structure |
| CN110797867B (en) * | 2019-11-08 | 2023-02-07 | 西南交通大学 | Single-phase or two-phase conversion three-phase power supply structure |
| CN113156275B (en) * | 2021-01-29 | 2022-01-04 | 西南交通大学 | Transformer insulation diagnosis method considering difference wiring modes |
| CN115117830B (en) * | 2022-07-15 | 2023-05-26 | 西南交通大学 | Hybrid traction circuit suitable for electrified railway through power supply system |
-
2007
- 2007-10-22 CN CNB2007100503034A patent/CN100527562C/en not_active Expired - Fee Related
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| CN101183792A (en) | 2008-05-21 |
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Assignee: Nanfang Engineering Co., Ltd. of China Railway Construction Electrification Bureau Group Co., Ltd. Assignor: Southwest Jiaotong University Contract fulfillment period: 2009.10.30 to 2014.10.30 contract change Contract record no.: 2009510000147 Denomination of invention: YNd11 connection transformer based AC electrified railway traction cophase supply device Granted publication date: 20090812 License type: Exclusive license Record date: 2009.11.9 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.10.30 TO 2014.10.30; CHANGE OF CONTRACT Name of requester: CHINA RAILWAY ELECTRIFICATION BUREAU GROUP SOUTHER Effective date: 20091109 |
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Granted publication date: 20090812 Termination date: 20151022 |
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