CN1075121A - Power supply mode with equivalent drawing transformer - Google Patents
Power supply mode with equivalent drawing transformer Download PDFInfo
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- CN1075121A CN1075121A CN 92113266 CN92113266A CN1075121A CN 1075121 A CN1075121 A CN 1075121A CN 92113266 CN92113266 CN 92113266 CN 92113266 A CN92113266 A CN 92113266A CN 1075121 A CN1075121 A CN 1075121A
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- contact system
- stilts
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- return wire
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Abstract
A kind of power supply mode with equivalent drawing transformer, the equivalent booster transformer has one group of primary winding and two groups of intensitys coil, primary winding is connected between flow wire and the contact system, first group of intensity coil take back streamline and rail (), second group of intensity coil connects the cond group.The ability of its existing opposing electromagnetic interference, contact system again needn't segmentations, eradicated the spark interference, improve contact system voltage.
Description
The present invention relates to a kind of power supply mode, particularly electric railway mode to the electric locomotive power supply.
Power system of electric railway adopts a kind of booster transformer feeding system at present, this booster transformer primary winding is series in the high voltage circuit of contact nets in electrified railways through a set of segmentation shackle, intensity coil connects the reflux line parallel with contact system, its objective is in return wire produce one with contact system in the electric current of current opposite in direction, be used to reduce interference to the light current circuit that is parallel to contact system; Its result but increases impedance, worsens quality of voltage, and motorcycle pantograph in service is the section insulator short circuit, scaling loss pantograph and section insulator, produce electromagnetism do around, become a big disadvantage.
The purpose of this invention is to provide a kind of power supply mode with equivalent drawing transformer, the ability of its existing opposing electromagnetic interference, contact system again needn't segmentation, has eradicated electric scaling loss and spark and has disturbed.Have second group of intensity coil, the partly offset voltage loss of cond group.
The present invention is the invention of electrified railway power supply mode.
The object of the present invention is achieved like this: shown in Figure 1 is the interconnecting wiring diagram of power supply mode with equivalent drawing transformer, electric locomotive (7) and supply line's contact system (5) thereof, built on stilts return wire (4) is parallel with contact system (5), it is characterized in that: equivalent booster transformer (3) has two groups of intensitys coil of one group of primary winding, its primary winding (3a) is series at traction substation flow wire (8), and between the contact system (5) in the high voltage circuit of electrified railway power supply.One end ground connection (rail) (9) of first group of intensity coil (3b), the other end built on stilts return wire (4) parallel with contact system (5) joins, and built on stilts return wire (4) has a place or many places through boosting cable (6) ground connection (rail) (9).The polarity of intensity coil (3b) makes electric current in the built on stilts return wire (4) and the current opposite in direction in the contact system (5).
Electric locomotive (7), by power supply (1), through bus (2), the primary winding (3a) of equivalent booster transformer (3), contact system (5) is obtained traction current Iq.The backflow Ih of electric locomotive (7) is through rail (9), and boosting cable (6) connects the intensity coil (3b) of equivalent booster transformer (3) through built on stilts return wire (4), get back to rail () (9), return to power supply (1).
The no-load voltage ratio of equivalent booster transformer is 1: 1 o'clock, and Iq equals Ih, is equal and opposite in direction, and direction is opposite.Suppose that electric locomotive is positioned at the middle part of the contact system of service area (5), boosting cable (6) is also at the middle part, contact system (5) closes at spatial destribution mutually with built on stilts return wire (4), in the AA'-BB' section, interference for the light current circuit that is parallel to contact system is almost offset, for the contact system total length, then there is the electromagnetic interference of 1/2nd length to be compensated, thereby reached jamming-proof purpose.
This equivalent booster transformer primary winding (3a) is series in the high voltage circuit of electric railway flow wire, also increase impedance, worsen quality of voltage, second group of intensity coil (3c) is set for this reason, and two terminations are gone into a group capacitor (10), when traction current Iq is arranged, second group of intensity coil (3c) induced potential, produce capacity current, be equivalent to the primary winding group capacitor of connecting, in order to the compensated part reactance; The induction reactance that wherein contains traction transformer, equivalent booster transformer etc.; Thereby reach the purpose that improves voltage levvl.Capacitor volume is determined according to voltage, primary side current and the number of turn of second group of intensity coil, the value of counteracting part reactance.The cond group will have fender guard.
Power supply mode with equivalent drawing transformer shown in Figure 2, built on stilts return wire (4b), (4c) are made up of (4a), and boosting cable (6b), (6c) is made up of (6a);
When electric locomotive (7a) is positioned between boosting cable (6a) and the equivalent booster transformer (3), the major part of backflow Iha is through boosting cable (6a), return wire (4a), return first group of intensity coil (3b) of equivalent booster transformer (3), the fraction electric current through rail () (9b), (9c), boosting cable (6b), (6c), return first group of intensity coil (3b) of equivalent booster transformer (3).
When electric locomotive (7b) be positioned at boosting cable (6a) and (6b) between the time, backflow Ihb respectively through rail () (9b), (9c) boosting cable (6a), with (6b), (6c), return wire (4a), (4b), (4c) return first group of intensity coil (3b) of equivalent booster transformer (3), the value and the backflow impedance of each branch current of being determined by the position of electric locomotive are inversely proportional.In built on stilts return wire (4b), form electric current I ha
*, Ihb
*, Ihc
*, in built on stilts return wire (4c), form electric current I ha', Ihb', Ihc' forms electric current I ha, Ihb, Ihc in built on stilts return wire (4a).
And have: Iha=Iha'+Iha
*
Ihb＝Ihb'+Ihb
＊
Ihc＝Ihc'+Ihc
＊
In like manner, when electric locomotive (7c) be positioned at boosting cable (6c) and (6b) between the time, backflow Ihc respectively through rail () (9b), (9c) boosting cable (6a), (6b), (6c), return wire (4a), (4b), (4c), return first group of intensity coil (3b) of equivalent booster transformer (3).
Boosting cable (6a), (6b), geographic position (6c) is determined by concrete engineering, generally should being located at train, to get the stream probability big, the place that current values is big.
In practical engineering application, the quantity of boosting cable, position, relevant with operating electric locomotive quantity, the size of getting stream, circuit plane vertical section.
First group of intensity coil (3b) of equivalent booster transformer (3) has a plurality of taps, after the ground connection number of return wire and place are determined, in order to adjust the electric current of intensity coil, to make the induced potential minimum in the light current circuit that is parallel to the traction net.
Because the raising of electrified railway automation, telemechanization degree, the position that obtains train has become possibility with the numerical value of getting stream, determine connecting of first group of intensity coil tap and return wire by the position of train and the size of getting stream, can make the induced potential minimum in the light current circuit that is parallel to contact system.
Above-described boosting cable (6) is the main thoroughfare that electric locomotive refluxes, and being again influence the reflux impedance electric elements of distribution of electric locomotive, connecting of attention and rail and the earth especially during installation, makes every effort to reduce contact resistance.
Power supply mode with equivalent drawing transformer shown in Figure 3, equivalent booster transformer (3) can insert rectifying device (11) at first group of intensity coil (3b), direct current via first-harmonic or harmonic wave modulation becomes ac converter device (12), and inverter current is sent into return wire (4).
This is because some disturbed light current circuit is only responsive to some frequency ratio, and the electric current in the contact system is made up of multiple frequency, make the induced potential frequency in the light current circuit that is parallel to the traction net also various, for being arranged, the purpose opposing disturbs, also in return wire, carry out once pre-frequency-selecting, make the induced potential minimum in the light current circuit that is parallel to the traction net.
Power supply mode with equivalent drawing transformer of the present invention is specially adapted to high-speed electric railway.Owing to cancelled the booster transformer and the section insulator that distribute along contact system, eradicated the scaling loss of motorcycle pantograph and section insulator, prolonged service life, guaranteed traffic safety, can improve train running speed, also reduced maintenance cost simultaneously.
Cancelled the booster transformer and the section insulator that distribute along contact system, concentrated on an equivalent booster transformer is set in the traction substation, once investment can reduce more than 30%.Because second group of intensity coil (3c) of equivalent booster transformer (3) adopts the part reactance of capacitance compensation equivalent booster transformer and traction transformer, can improve the contact system voltage levvl, reaches more than 3000 volts, prolonged the length of feeding section.For the main line of growing up, can reduce the quantity of traction substation, improve the voltage of contact system, improve quality of voltage, economy and technical elements be the tangible advantage of tool all.
By changing the quantity and the position of boosting cable, can handle operation back anti-jamming capacity easily.The equivalent booster transformer is arranged in the traction substation, is convenient to maintenance and management.
For existing booster transformer supply line, because train quantity increases, perhaps the weight of train increases, and the contact system undertension that causes, the present invention also is a modification scheme preferably; At first between flow wire and contact system, install the equivalent booster transformer, remove the booster transformer that is provided with along contact system then, remove the boosting cable between two booster transformers, and, boosting cable is set near former booster transformer gets final product the disconnector short circuit at section insulator place.
Claims (3)
1, a kind of power supply mode with equivalent drawing transformer, electric locomotive (7) is arranged, and supply line's contact system (5), built on stilts return wire (4), built on stilts return wire (4) is parallel with contact system (5), it is characterized in that: equivalent booster transformer (3) has two groups of intensitys coil of one group of primary winding, its primary winding (3a) is series between the flow wire (8) of traction substation and the contact system (5) in the high voltage circuit of electrifing railway supply, one end ground connection (rail) (9) of first group of intensity coil (3b), the other end built on stilts return wire (4) parallel with contact system (5) joins, and built on stilts return wire (4) has a place or many places through boosting cable (6) ground connection (rail) (9); The polarity of intensity coil (3b) makes electric current and the middle current opposite in direction of contact system (5) in the built on stilts return wire (4); Second group of intensity coil (3c), two terminations are gone into a group capacitor (10).
2, by the described equivalent booster transformer of claim 1. (3), it is characterized in that: can insert rectifying device (11) at first group of intensity coil (3b), direct current via first-harmonic or harmonic wave modulation becomes ac converter device (12), and inverter current is sent into built on stilts return wire (4).
3, by the described equivalent booster transformer of claim 1. (3), it is characterized in that: first group of intensity coil (3b) has a plurality of taps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92113266 CN1075121A (en) | 1992-12-02 | 1992-12-02 | Power supply mode with equivalent drawing transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92113266 CN1075121A (en) | 1992-12-02 | 1992-12-02 | Power supply mode with equivalent drawing transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1075121A true CN1075121A (en) | 1993-08-11 |
Family
ID=4946324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92113266 Pending CN1075121A (en) | 1992-12-02 | 1992-12-02 | Power supply mode with equivalent drawing transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1075121A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101365606B (en) * | 2006-02-10 | 2011-03-09 | 株式会社明电舍 | DC power storage device |
| CN108790957A (en) * | 2018-06-29 | 2018-11-13 | 中铁二院工程集团有限责任公司 | A kind of urban track traffic integrated ground system applied to alternating current traction power supply system |
-
1992
- 1992-12-02 CN CN 92113266 patent/CN1075121A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101365606B (en) * | 2006-02-10 | 2011-03-09 | 株式会社明电舍 | DC power storage device |
| CN108790957A (en) * | 2018-06-29 | 2018-11-13 | 中铁二院工程集团有限责任公司 | A kind of urban track traffic integrated ground system applied to alternating current traction power supply system |
| CN108790957B (en) * | 2018-06-29 | 2023-07-18 | 中铁二院工程集团有限责任公司 | Urban rail transit comprehensive grounding system applied to alternating current traction power supply system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |