CN104085318A - Steel rail resonance grounding device - Google Patents
Steel rail resonance grounding device Download PDFInfo
- Publication number
- CN104085318A CN104085318A CN201410283091.4A CN201410283091A CN104085318A CN 104085318 A CN104085318 A CN 104085318A CN 201410283091 A CN201410283091 A CN 201410283091A CN 104085318 A CN104085318 A CN 104085318A
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- Prior art keywords
- rail
- steel rail
- resonance
- grounding device
- branch road
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- 229910000831 Steel Inorganic materials 0.000 title abstract 11
- 239000010959 steel Substances 0.000 title abstract 11
- 239000003990 capacitor Substances 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000002955 isolation Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Train Traffic Observation, Control, And Security (AREA)
Abstract
A steel rail resonance grounding device is formed by an LC series connection resonance branch and is used under the occasion where an alternating current electrified railway and a direct current electrified railway share a steel rail. The steel rail resonance grounding device is connected between the steel rail and a grounding grid, and the resonance frequency of the LC series connection resonance branch is equal to the working frequency of the alternating current electrified railway. When an alternating current train runs on the rail, the LC branch arranged in the steel rail resonance grounding device generates series connection resonance which is equivalent to short circuit, steel rail grounding is achieved, and dangerous potential does not occur on the steel rail. When a direct current train runs on the rail, a capacitor in the steel rail resonance grounding device achieves a direct current isolation effect, the steel rail is isolated from the ground, and stray current is not generated. The grounding device does not require manual operation and provides a guarantee for power supply safety of the occasion where the alternating current electrified railway and the direct current electrified railway share the steel rail.
Description
Technical field
The invention belongs to track traffic traction power supply technical field, be specifically related to a kind of rail resonance grounding device.
Background technology
Along with the development of China's main line electric railway and urban track traffic, inevitably occur that some AC and DC electric railways share the situation of rail, this situation is more common on the makers' line of shunting of some rolling stocks.The line of shunting often takes up an area for saving, reduces construction cost, requires on a circuit to run AC electric locomotive and motor train unit, can run again DC electric car group.Certainly, when train that on circuit, running current standard is different, contact system or contact rail power supply difference, but as supporting and the rail of guiding train is identical, that is, AC and DC electric railway shares rail.At this moment, ac power supply system is for restriction rail potential is to ensure power supply safety, and General Requirements rail is wanted ground connection, and DC power-supply system is for reducing stray current in ground, and General Requirements rail will insulate over the ground.For meet the two requirement simultaneously, at present scheme be conventionally at a certain distance on the line (as 200m) a rail earthing switch is set, in the time that operation exchanges train, all rail earthing switch closures on circuit, realize rail ground connection; In the time of operation direct current train, then these switch opens, realize the isolation of rail and the earth.In the time that the line of shunting is busy, switch back brake work capacity is very large, and easily makes mistakes.If on actual operating line, run into AC and DC electric railway and share rail situation, because rate of traffic flow is high, adopt rail earthing switch be obviously unpractical by artificial grid switching operation according to type of train.Therefore, share the occasion of rail at AC and DC electric railway, can meet AC and DC electric power system backflow ground connection needs in the urgent need to one, do not need again the operatorless device of back brake operation.
Summary of the invention
Object of the present invention is just to provide a kind of rail resonance grounding device, it is arranged between rail and the earth (grounding lattice), and in the time that on circuit, operation exchanges train, this device can be realized rail ground connection automatically, facilitate the leakage of alternating current, avoid occurring on rail dangerous current potential; In the time moving direct current train on circuit, this device can play every straight effect, automatically realizes the isolation of rail and the earth, avoids producing into ground stray current.In device operational process, do not need manual work.
Technical scheme of the present invention:
A kind of rail resonance grounding device, shares rail occasion for AC and DC electric railway, is made up of LC series resonance branch road, is connected between rail and grounding lattice, and the resonant frequency of LC series resonance branch road equals the frequency of operation of ac electrified railway.
Beneficial effect of the present invention:
Share the occasion of rail at AC and DC electric railway, adopt rail resonance grounding device of the present invention, while exchanging train when what move on circuit, the LC branch road generation series resonance of rail resonance grounding device the inside, be equivalent to short circuit, realize rail ground connection, on rail, there will not be dangerous current potential; When on circuit, move be direct current train time, the electric capacity of rail resonance grounding device the inside plays every straight effect, has realized rail and has isolated over the ground, can not produce stray current.Rail resonance grounding device adapts to ac power supply system and the different requirements of DC power-supply system to rail ground connection automatically, does not need manual operation, and the power supply safety that shares rail occasion for AC and DC electric railway provides safeguard.
Brief description of the drawings
Fig. 1 is rail resonance grounding device circuit schematic diagram.
Fig. 2 is an embodiment of rail resonance grounding device.
Detailed description of the invention
The present invention is a kind of rail resonance grounding device, share rail occasion for AC and DC electric railway, be made up of LC series resonance branch road, be connected between rail and grounding lattice, the resonant frequency of LC series resonance branch road equals the frequency of operation of ac electrified railway.Its principle of work illustrates referring to Fig. 1.In Fig. 1, G is rail, capacitor C and inductance L form series resonance branch road, and the frequency of operation that resonant frequency is ac electrified railway, is generally 50Hz or 60Hz, this series resonance branch road is equivalent to short circuit to the traction current that exchanges train, automatically realize the ground connection of rail, to the traction current of direct current train, due to electric capacity every straight effect, DC traction electric current cannot enter ground by this branch road, thereby can not produce stray current.
Below in conjunction with detailed description of the invention, the invention will be further described.
In Fig. 2, capacitor C and inductance L form the LC series resonance branch road that resonant frequency is f, and the frequency of operation that wherein f is ac electrified railway, is generally 50Hz or 60Hz.Resistance R is connected in parallel on capacitor C two ends, the electric discharge to C while work for installing.Fuse F is connected on LC series resonance branch road, for the overcurrent protection to LC series resonance branch road.On LC series resonance branch road, be provided with a Current Transmit, for measuring LC series resonance branch current; I is amperemeter/ammtr, is used to indicate current value.On LC series resonance branch road, a K switch in parallel, as by-pass switch, is opened when normal.
Rail resonance grounding device can adopt cabinet type structure, and as shown in Figure 2, the equipment in frame line is all arranged in sealing cabinet, connects rail and grounding lattice by cable.
Claims (6)
1. a rail resonance grounding device, share rail occasion for AC and DC electric railway, it is characterized in that: be made up of LC series resonance branch road, be connected between rail and grounding lattice, the resonant frequency of LC series resonance branch road equals the frequency of operation of ac electrified railway.
2. rail resonance grounding device according to claim 1, is characterized in that: the resonant frequency of described LC series resonance branch road is generally 50Hz or 60Hz.
3. rail resonance grounding device according to claim 1, is characterized in that: resistance R is connected in parallel on capacitor C two ends the electric discharge to C while work for installing.
4. rail resonance grounding device according to claim 1, is characterized in that: on LC series resonance branch road, be provided with a current transformer, for measuring LC series resonance branch current.
5. rail resonance grounding device according to claim 1, is characterized in that: fuse F is connected on LC series resonance branch road, for the overcurrent protection to LC series resonance branch road.
6. rail resonance grounding device according to claim 1, is characterized in that: on LC series resonance branch road, a switch in parallel, as by-pass switch, is opened when normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410283091.4A CN104085318B (en) | 2014-06-23 | 2014-06-23 | Rail resonance grounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410283091.4A CN104085318B (en) | 2014-06-23 | 2014-06-23 | Rail resonance grounding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104085318A true CN104085318A (en) | 2014-10-08 |
| CN104085318B CN104085318B (en) | 2017-07-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410283091.4A Expired - Fee Related CN104085318B (en) | 2014-06-23 | 2014-06-23 | Rail resonance grounding device |
Country Status (1)
| Country | Link |
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| CN (1) | CN104085318B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023016467A1 (en) * | 2021-08-13 | 2023-02-16 | 史蒂文·庞 | Method for reducing stray current produced by power supply backflow for subway walking rail |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1042466A (en) * | 1996-07-17 | 1998-02-13 | West Japan Railway Co | Dc filter for electric railway |
| JP2006069406A (en) * | 2004-09-03 | 2006-03-16 | Railway Technical Res Inst | Substation |
| CN101032971A (en) * | 2007-04-27 | 2007-09-12 | 北京交通大学 | Audio frequency orbit circuit impedance matching circuit in station |
| CN102386621A (en) * | 2011-10-31 | 2012-03-21 | 中冶南方工程技术有限公司 | Single-tuned filter and optimal quality factor calculation method thereof |
| CN202260456U (en) * | 2011-09-01 | 2012-05-30 | 李子晗 | Second-order wave blocking high-pass filtering apparatus used for traction and electric power supply, for three-phase electric power supply system |
| CN103094903A (en) * | 2013-01-30 | 2013-05-08 | 株洲变流技术国家工程研究中心有限公司 | Engine-network resonance ground comprehensive treatment system |
-
2014
- 2014-06-23 CN CN201410283091.4A patent/CN104085318B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1042466A (en) * | 1996-07-17 | 1998-02-13 | West Japan Railway Co | Dc filter for electric railway |
| JP2006069406A (en) * | 2004-09-03 | 2006-03-16 | Railway Technical Res Inst | Substation |
| CN101032971A (en) * | 2007-04-27 | 2007-09-12 | 北京交通大学 | Audio frequency orbit circuit impedance matching circuit in station |
| CN202260456U (en) * | 2011-09-01 | 2012-05-30 | 李子晗 | Second-order wave blocking high-pass filtering apparatus used for traction and electric power supply, for three-phase electric power supply system |
| CN102386621A (en) * | 2011-10-31 | 2012-03-21 | 中冶南方工程技术有限公司 | Single-tuned filter and optimal quality factor calculation method thereof |
| CN103094903A (en) * | 2013-01-30 | 2013-05-08 | 株洲变流技术国家工程研究中心有限公司 | Engine-network resonance ground comprehensive treatment system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023016467A1 (en) * | 2021-08-13 | 2023-02-16 | 史蒂文·庞 | Method for reducing stray current produced by power supply backflow for subway walking rail |
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| Publication number | Publication date |
|---|---|
| CN104085318B (en) | 2017-07-28 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20141008 Assignee: Beijing Huiguan Software Co.,Ltd. Assignor: Beijing Jiaotong University Contract record no.: 2019990000249 Denomination of invention: Steel rail resonance grounding device Granted publication date: 20170728 License type: Common License Record date: 20190722 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170728 |