CN108128214A - A kind of method for reducing AT power supply mode single-core cable sheath induced voltages - Google Patents
A kind of method for reducing AT power supply mode single-core cable sheath induced voltages Download PDFInfo
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- CN108128214A CN108128214A CN201711112551.7A CN201711112551A CN108128214A CN 108128214 A CN108128214 A CN 108128214A CN 201711112551 A CN201711112551 A CN 201711112551A CN 108128214 A CN108128214 A CN 108128214A
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- cable
- lines
- cables
- induced voltage
- sheath induced
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
Abstract
A kind of method for reducing AT power supply mode single-core cable sheath induced voltages effectively reduces the sheath induced voltage of cable and saves the arrangement space of cable, improves cable security performance and reduces laying work and makes.Cable includes more T lines cables and F line cables, and each T lines cable, F lines cable parallel arrangement are in cable duct, and each T lines cable, F line cables are generally aligned in the same plane in horizontal plane or in same vertical plane, and T lines cable is staggered with F line cables.
Description
Technical field
The present invention relates to electric railway, more particularly to a kind of reduction AT power supply mode 27.5kV single-core cables sheath sensing
The method of voltage, suitable for the design and transformation of more telegram in reply cable arrangements.
Background technology
In high-speed railway, AT power supply modes, that is, autotransformer feeding system, T lines to train for carrying in AT power supply modes
For traction current, F lines flow back to electric substation for traction current.Cable connection traction substation and Traction networks, carries electric energy
The task of transmission.Entire supply arm will be caused to lose electric energy when cable breaks down, therefore cable is in entire traction power supply system
It is extremely important in system.The cable of single-phase transmission of electricity in high-speed railway, core wire is by monophase current, magnetic line of force linkage metal sheath,
If 2 end of outer jacket of cable is directly grounded, it is equivalent to and forms the transformer of 11: 1, very big induced voltage and heat will be generated
Amount loss, accelerates cable insulation aging, influences the normal operation of cable.The choosing of single feeder cable system of laying and laying spacing
Take and be directly related to the sheath induced voltage of cable and its laying work cost, at present cable often with order of placement be TTF arrangement,
TTFF arrangements, TTTFF arrangements and TTTFFF arrangements, these method for arranging cable sheath voltages are very high and occupied space is big, Yi Zao
Into electric cable heating.
Invention content
The technical problems to be solved by the invention are to provide a kind of reduction AT power supply mode single-core cable sheath induced voltages
Method, effectively reduce 27.5kV cables sheath induced voltage and save cable arrangement space, improve cable security performance
It is made with laying work is reduced.
The technical solution adopted by the present invention to solve the technical problems is as follows：
A kind of method of reduction AT power supply modes single-core cable sheath induced voltage of the present invention, cable include more T lines
Cable and F line cables, it is characterized in that：Each T lines cable, F lines cable parallel arrangement are in cable duct, each T lines cable, F line cables
It is generally aligned in the same plane in horizontal plane or in same vertical plane；T lines cable is staggered with F line cables.
The invention has the advantages that by way of coordinated transposition, magnetic field between T lines cable and F line cables is utilized
It offsets each other, so as to which the sheath induced voltage of cable and sensing electric current be greatly lowered, improves the security performance of cable；It can be with
It is effective to reduce cable sheath induced voltage and space hold, effectively reduce cable while cable laying project cost is reduced
Fever improves the service life of cable.
The present disclosure applies equally to the layings of T lines under direct feeding system and return wire cable.
Description of the drawings
This specification includes following 15 width attached drawing：
Fig. 1 to Figure 12 is the system of laying of cable and laying spacing schematic diagram, in figure label for：T lines cable 1, S line cables
2, T line cables are to the interval S of T line cablesTT, T lines cable to the interval S of F line cablesTF, F lines cable to the spacing of T line cables
SFT。
When Figure 13 is TF parallel lay-ups cable sheath induced voltage with spacing change curve.
When Figure 14 is TT parallel lay-ups cable sheath induced voltage with spacing change curve.
Figure 15 is change curve of the TTT parallel lay-ups with cable sheath induced voltage during the laying of TTT isosceles triangles with spacing.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
With reference to Fig. 6, Fig. 8 and Figure 12, a kind of side of reduction AT power supply modes single-core cable sheath induced voltage of the invention
Method, cable include more T lines cables 1 and F lines cable 2, and each T lines cable 1, F lines cable 2 are arranged in parallel in cable duct, each T lines
Cable 1, F lines cable 2 are generally aligned in the same plane in horizontal plane or in same vertical plane；T lines cable 1 and 2 staggered row of F lines cable
Row.The order of placement of i.e. three cables is TFT, and the order of placement of four cables is TFTF or FTFT, the order of placement of 5 cables
For TFTFT, 6 cables are TFTFTF or FTFTFT.By way of coordinated transposition, magnetic between T lines cable and F line cables is utilized
Field offsets each other, and so as to which the sheath induced voltage of cable and sensing electric current be greatly lowered, improves the security performance of cable.
Meanwhile cable sheath induced voltage and space hold can be effectively reduced, have while cable laying project cost is reduced
Effect reduces electric cable heating, improves the service life of cable.
With reference to Fig. 6 and Figure 12, when the number of cables is even number and T lines cable 1 and F lines cable 2 one-to-one correspondence, T lines electricity
Cable 1 and F lines cable 2 is arranged in order with two one group, and T lines cable 1 and 2 spacing of F lines cable with group are 8~12cm, different
The F lines cable 2 of group is 20~30cm with the spacing of T lines cable 1.With reference to Figure 10, when the number of cables quantity is odd number, each T
Line cable 1, F lines cable 2 are equally spaced in order, and cable spacing is 8~12cm.
With construction energetically, the raising of Double-Track Railway rate of railway, cable is influenced by extraneous factor, and small, power supply reliability is high
With floor space it is small the advantages of increase considerably cable usage amount, while also bring some problems, it is existing such as cable
Arrangement causes cable sheath overtension, and electric cable heating is serious and space hold is big.
Patent of the present invention is based on the characteristics of railway more receipt core cable arrangements modes and conducts a research, and is obtained by simulation analysis
The changing rule of sheath induced voltage is as follows：
1st, 1 T lines cable 1 and 1 F line cable, arrangement are as shown in Figure 1.As shown in figure 13, it is obtained by simulation analysis
To sheath induced voltage U during TF parallel lay-ups with T lines cable to the interval S of F line cablesTFSituation of change.As shown in Figure 13, with
T lines cable to the interval S of F line cablesTFReduction, the sheath induced voltage of cable reduces；Reduce T lines cable to F line cables
Interval STFNot only the occupied space of cable can have been reduced, reduced cost, but also advantageously reduced cable fault, increase cable life, T lines
Cable is to the interval S of F line cablesTFPreferably take 8~12cm.
2nd, 2 T line cables, arrangement are as shown in Figure 1.As shown in figure 14, TT parallel lay-ups are obtained by simulation analysis
When sheath induced voltage U with cable interval STTSituation of change.As shown in Figure 14, with T lines cable to the spacing of T line cables
STTIncrease, sheath induced voltage reduces, and whens TT parallel lay-ups should increase the interval S of T lines cable and T line cables as possibleTT,
To reduce sheath induced voltage, cable life is improved, it is contemplated that the cost of cable laying engineering, between T lines cable and T line cables
Away from STTPreferably take 20~40cm.Attached drawing 13 is compared with attached drawing 14 it is found that being laid jointly compared to T lines cable and T lines cable, T lines electricity
Cable and F lines cable intersect laying and are more advantageous to reducing sheath induced voltage.
3rd, 3 T line cable arrangements, arrangement is as shown in Figure 3 and Figure 4.As shown in figure 15, it is obtained by simulation analysis
To intermediate cable during TTT parallel lay-ups sheath induced voltage and TTT isosceles triangles laying when cable sheath induced voltage with electricity
The situation of change of cable spacing.With reference to Figure 15, TTT parallel lay-ups lay sheath induced voltage with T lines cable to T with TTT isosceles triangles
The interval S of line cableTTIncrease and reduce, T lines cable is to the interval S of T line cables under 2 kinds of system of layingTTWhen equal, most
High voltage approximately equal.The induced voltage that isosceles triangle lays 3 T lines is ceiling voltage, and parallel lay-up only has intermediate T lines electricity
The induced voltage of cable is ceiling voltage, and since isosceles triangle applies higher than parallel lay-up construction requirement, therefore 3 T line cable layings are appropriate to the occasion
Using TTT parallel lay-ups, and increase T lines cable as possible to the interval S of T line cablesTT, to reduce sheath induced voltage, it is contemplated that
The cost of cable laying engineering, T lines cable to the interval S of T line cablesTTPreferably take 20~30cm.
4th, 2 T lines and 2 F line cables, arrangement is as shown in Figure 5 and Figure 6.When TTFF parallel lay-ups and TFTF intersect
T lines cable under parallel application mode is to the interval S of T line cablesTT, T lines cable to F line cables interval STFWith F lines cable to T
The interval S of line cableFTWhen being 20cm, the sheath induced voltage of cable is up to 11.5V, summation when obtaining TTFF parallel lay-ups
For 38.8V, the sheath induced voltage of cable is up to 8.3V, summation 26.0V when TFTF cross parallels are laid, and TFTF, which intersects, to be put down
Pass through the sheath induced voltage for intersecting laying, greatly reducing cable of T lines and F lines during row laying.It follows that 2 T lines
It when cable and 2 F line cable layings, is preferably laid using TFTF cross parallels, with reference to the conclusion obtained in above-mentioned 1 and 2, TFTF is handed over
Fork parallel lay-up can effectively reduce sheath induced voltage, F lines cable to T again while cable laying project cost is reduced
The interval S of line cableFTPreferably take 20~30cm, T lines cable to the interval S of F line cablesTFPreferably take 8~12cm, and F lines cable is to T
The interval S of line cableFTValue is larger good, T lines cable to the interval S of F line cablesTFIt is smaller good to take.
5th, 3 T lines cables and 2 F line cables, arrangement is as shown in Figure 7 and Figure 8.By to TTFF parallel lay-ups and
TFTF cross parallels laying contrast simulation analysis, when the T lines electricity under TTTFF parallel lay-ups and TFTFT cross parallel system of laying
Cable is to the interval S of T line cablesTT, T lines cable to F line cables interval STFWith F lines cable to the interval S of T line cablesFTIt is
During 20cm, the sheath induced voltage of cable is up to 13.7V, summation 51.3V, TFTFT intersection when obtaining TTTFF parallel lay-ups
The sheath induced voltage of cable is up to 7V, summation 22.9V during parallel lay-up；The laying of TFTFT cross parallels is parallel with TTTFF
Laying is compared, and greatly reduces the sheath induced voltage of cable.Therefore when 3 T lines cables and 2 F line cable layings, preferably use
TFTFT cross parallels are laid, since F line cable currents are larger, T lines cable to the interval S of F line cablesTFAnd SFTIt is depressured when smaller
Effect is good.With reference to the conclusion obtained in (one) and (two), it is proposed that interval STFWith F lines cable to the interval S of T line cablesFTTake 8
~10cm；TFTFT cross parallels system of laying can effectively reduce the occupied space of cable, reduce making for cable laying engineering
Valency, while the sheath induced voltage of cable can be greatly lowered again, improve cable security performance.
6th, 3 T lines cables and 3 F line cables, mainly there is 3 kinds of arrangements, wherein TTTFFF parallel lay-ups and TFTFTF
Cross parallel laying is similar with TFTF cross parallel system of laying with TTFF parallel lay-ups in above 4；TTTFFF isosceles triangles are laid
Similar with 3 T lines isosceles triangle layings in above-mentioned 3, effect is bad, and higher to construction requirement, should not use.For 3 T lines
When cable and 3 F line cable layings, with reference to the conclusion in above 1,2,3, preferably using TFTFTF cross parallel system of laying.F lines
Cable is to the interval S of T line cablesFTPreferably take 20~30cm, T lines cable to the interval S of F line cablesTFPreferably take 8~10cm, and F lines
Cable is to the interval S of T line cablesFTLarger good, the T lines cable of value is to the interval S of F line cablesTFValue is smaller good.
Claims (3)
1. a kind of method for reducing AT power supply mode single-core cable sheath induced voltages, cable include more T lines cables (1) and F
Line cable (2), it is characterized in that：Each T lines cable (1), F lines cable (2) parallel arrangement are in cable duct, each T lines cable (1), F lines
Cable (2) is generally aligned in the same plane in horizontal plane or in same vertical plane；T lines cable (1) is staggered with F lines cable (2).
2. a kind of method of reduction AT power supply modes single-core cable sheath induced voltage as described in right 1, it is characterized in that；It is described
When number of cables is even number and T lines cable (1) and F lines cable (2) one-to-one correspondence, T lines cable (1) is with F lines cable (2) with two
One group arranges in order, and T lines cable (1) and F lines cable (2) spacing with group are 8~12cm, the F lines cables (2) of difference group with
The spacing of T lines cable (1) is 20~30cm.
3. a kind of method of reduction AT power supply modes single-core cable sheath induced voltage as described in right 1, it is characterized in that；It is described
When number of cables quantity is odd number, each T lines cable (1), F lines cable (2) are equally spaced in order, cable spacing for 8~
12cm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711112551.7A CN108128214A (en) | 2017-11-13 | 2017-11-13 | A kind of method for reducing AT power supply mode single-core cable sheath induced voltages |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711112551.7A CN108128214A (en) | 2017-11-13 | 2017-11-13 | A kind of method for reducing AT power supply mode single-core cable sheath induced voltages |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA001465B1 (en) * | 1996-05-29 | 2001-04-23 | Абб Аб | A rotating asynchronous converter and a generator device |
| CN201816475U (en) * | 2010-08-03 | 2011-05-04 | 铁道第三勘察设计院集团有限公司 | Alternating-current compact transmission system for electrified railway |
| CN106129991A (en) * | 2016-08-30 | 2016-11-16 | 中铁电气化勘测设计研究院有限公司 | A kind of high-speed railway Special single-core cable grounding technical scheme |
-
2017
- 2017-11-13 CN CN201711112551.7A patent/CN108128214A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA001465B1 (en) * | 1996-05-29 | 2001-04-23 | Абб Аб | A rotating asynchronous converter and a generator device |
| CN201816475U (en) * | 2010-08-03 | 2011-05-04 | 铁道第三勘察设计院集团有限公司 | Alternating-current compact transmission system for electrified railway |
| CN106129991A (en) * | 2016-08-30 | 2016-11-16 | 中铁电气化勘测设计研究院有限公司 | A kind of high-speed railway Special single-core cable grounding technical scheme |
Non-Patent Citations (1)
| Title |
|---|
| 曹晓斌 等: "《高速铁路单芯馈线电缆的敷设方式和敷设间距》", 《中国铁道科学》 * |
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Application publication date: 20180608 |