CN108162809B - Directional conduction reflux device - Google Patents
Directional conduction reflux device Download PDFInfo
- Publication number
- CN108162809B CN108162809B CN201810052178.9A CN201810052178A CN108162809B CN 108162809 B CN108162809 B CN 108162809B CN 201810052178 A CN201810052178 A CN 201810052178A CN 108162809 B CN108162809 B CN 108162809B
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- Prior art keywords
- diode
- incoming line
- running rail
- line
- direct current
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M7/00—Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M5/00—Arrangements along running rails or at joints thereof for current conduction or insulation, e.g. safety devices for reducing earth currents
Abstract
The directional conduction reflux device can ensure that the reflux of the running rail is smooth, and can also ensure that the running rail in the parking lot and the running rail outside the parking lot are completely disconnected on an electric loop, and changes the mode that the parking lot is in unidirectional conduction with the running rail in the positive line and the running rail outside the parking lot and the running rail loop outside the parking lot through the unidirectional conduction device in the past so as to realize the optimization of reducing the stray current corrosion. The device comprises a1 st incoming line and a2 nd incoming line which are respectively connected with a running rail in a left yard warehouse and a running rail outside a right yard warehouse of an insulating junction, and a1 return outgoing line which is connected with a negative electrode of a traction substation. The device also comprises a1 st incoming line and a2 nd incoming line which are respectively connected with the outer running rail of the left yard warehouse and the right positive line running rail of the insulating junction, and a1 return outgoing line which is connected with the negative electrode of the traction substation; the 1 st incoming line and the 2 nd incoming line are respectively connected with the 1 st return line through the 1 st diode and the 2 nd diode. The automatic arc extinction device is connected with the 1 st incoming line and the 2 nd incoming line and is positioned behind the 1 st diode and the 2 nd diode. The direct current isolating switch is also connected with the 1 st incoming line and the 2 nd incoming line and is positioned behind the 1 st diode and the 2 nd diode.
Description
Technical Field
The invention relates to a directional conduction reflux device used in urban rail transit engineering.
Background
At present, most urban rail transit engineering traction power supply systems adopt a direct current power supply mode, and overhead contact systems (referred to as overhead contact systems or contact rails, the same applies to the lower part) power supply mode and a running rail reflux mode. An electric subsection is arranged between a contact net parking lot (referred to as a vehicle section or a parking lot, and the same applies below) and a positive line, an electric subsection is arranged between power supply subareas of the parking lot, and an electric subsection is arranged at an entrance of each garage line of the parking lot.
In order to prevent stray current corrosion, an insulating junction is generally arranged between a yard and a positive line running rail (i.e. on an access yard line), and an unidirectional conduction device is arranged between a storage interior and an external running rail of each electrochemical storage line of the yard, so that current in the running rail can only flow in one direction. The specific setting position of the unidirectional conduction device corresponds to the electric segmentation position of the contact net. The unidirectional conduction device mainly comprises a diode branch, a direct current isolating switch and an automatic arc extinguishing device, the wiring mode of the unidirectional conduction device is shown in fig. 4, and the arrangement mode of the unidirectional conduction device of a parking lot is shown in fig. 5. When the diode branch breaks down and overhauls, the direct current isolating switch is closed to lead the running rails on two sides of the insulating junction to be conducted, so that the smoothness of the running rail negative reflux loop is ensured; the automatic arc suppression device is used for limiting the rise of the potential difference of the steel rails at the two sides of the running rail insulating junction when the direct current isolating switch is normally opened so as to avoid arc discharge when a train passes.
Because the ground is insulated poorly and the transition resistance is small, the diode branch of the unidirectional conduction device is used for communicating the ground with the positive line running rail in one direction, once the transition resistance of the running rail on a certain position of the positive line to the ground is reduced, the traction reflux current on the positive line running rail is led to pass through the ground, the ground running rail, the unidirectional conduction device on the access field line and the positive line running rail in sequence, and flows back to the negative electrode of the positive line traction substation to form a large amount of stray current.
Because the ground is poor in insulation and small in transition resistance of the yard running rail, the diode branch of the unidirectional conduction device is used for communicating the yard interior with the yard exterior running rail in one direction, so that traction reflux current on the yard exterior running rail sequentially passes through the ground, the yard interior running rail, the unidirectional conduction device between the yard interior running rail and the yard exterior running rail, and flows back to the negative pole of the yard traction substation to form a large amount of stray current.
The adverse consequences caused are as follows:
1) The large amount of stray current formed causes serious corrosion of metal pipelines and building structure steel bars near a car park;
2) When the ground wire is hung on the steel rail in the yard, the ground rod generates continuous and serious discharge phenomenon on the grounding body, and normal ground wire hanging operation is affected;
3) The rail potential in the yard is also high for a long time even if no train is running in the yard, so that the rail potential limiting device in the yard frequently acts.
In a word, the traditional unidirectional conduction device brings great potential safety hazard for long-term safe and reliable operation of urban rail transit engineering, and cannot meet the higher and higher requirements for safe and reliable operation.
Aiming at the traditional unidirectional conduction device mode, the directional conduction reflux device is provided from the angles of safe and reliable operation, convenient construction and installation, operation management and maintenance, so as to realize the optimization of reducing stray current corrosion, and solve a series of problems of continuous and serious discharge when a ground wire is hung on a steel rail in a yard, influence on the operation of the ground wire, frequent actions of the steel rail potential limiting device in the yard and the like.
Disclosure of Invention
The invention aims to solve the technical problems of providing the directional conduction reflux device, which can ensure that the reflux of the running rail is smooth, can also ensure that the running rail in the yard and the normal running rail and the running rail outside the yard in the yard are completely disconnected on an electric loop, changes the mode of unidirectional conduction of the running rail in the yard and the running rail outside the yard in the yard through the unidirectional conduction device so as to realize the optimization of reducing the corrosion of stray current, solves the problems that the operation of the hanging ground wire is influenced by continuous and serious discharge when the ground wire is hung on the steel rail in the yard, and the frequent action of the steel rail potential limiting device in the yard, and the like, ensures the operation safety and reliability to the maximum extent, and is convenient for construction, installation, operation management and maintenance.
The technical scheme adopted by the invention is as follows:
the invention relates to a directional conduction reflux device, which is characterized in that: the device comprises a1 st incoming line and a2 nd incoming line which are respectively connected with a running rail in a left yard warehouse and a running rail outside a right yard warehouse of an insulating junction, and a1 return outgoing line which is connected with a negative electrode of a traction substation; the device also comprises a1 st incoming line and a2 nd incoming line which are respectively connected with the outer running rail of the left yard warehouse and the right positive line running rail of the insulating junction, and a1 return outgoing line which is connected with the negative electrode of the traction substation; the 1 st incoming line and the 2 nd incoming line are connected with the 1 st return line through a1 st diode and a2 nd diode respectively; the automatic arc extinction device is connected with the 1 st incoming line and the 2 nd incoming line and is positioned behind the 1 st diode and the 2 nd diode; the direct current isolating switch is also connected with the 1 st incoming line and the 2 nd incoming line and is positioned behind the 1 st diode and the 2 nd diode.
The invention relates to a directional conduction reflux device, which is characterized in that: the device comprises a1 st incoming line and a2 nd incoming line which are respectively connected with a running rail in a left yard warehouse and a running rail outside a right yard warehouse of an insulating junction, and a1 return outgoing line which is connected with a negative electrode of a traction substation; the device also comprises a1 st incoming line and a2 nd incoming line which are respectively connected with the outer running rail of the left yard warehouse and the right positive line running rail of the insulating junction, and a1 return outgoing line which is connected with the negative electrode of the traction substation; the 1 st incoming line and the 2 nd incoming line are connected with the 1 st return line through a1 st diode and a2 nd diode respectively; the automatic arc extinction device is connected with the 1 st incoming line and the 2 nd incoming line and is positioned behind the 1 st diode and the 2 nd diode; the 1 st direct current isolating switch and the 2 nd direct current isolating switch are respectively connected with the 1 st diode and the 2 nd diode in parallel.
The invention has the advantages of reducing stray current, solving a series of problems that the operation of the ground wire is affected by continuous and serious discharge when the ground wire is hung on the steel rail in a yard, and the frequent action of the steel rail potential limiting device in the yard, ensuring the operation safety and reliability to the maximum extent, being convenient for construction and installation and operation management and maintenance, and being widely applied to the urban rail transit engineering of various current direct current traction power supply modes.
Drawings
The specification includes the following five drawings:
FIG. 1 is a schematic diagram of a directional conduction reflow apparatus according to the present invention;
FIG. 2 is a schematic diagram of a directional conduction reflow apparatus according to embodiment 1 of the present invention;
FIG. 3 is a schematic view of a directional conduction reflow apparatus according to embodiment 2 of the present invention;
FIG. 4 is a schematic diagram of a wiring scheme of a conventional unidirectional current conducting apparatus;
fig. 5 is a schematic diagram of a layout of a yard unidirectional conducting apparatus.
The components and corresponding indicia are shown: the 1 st diode 11, the 2 nd diode 12, the 1 st direct current isolating switch 21, the 2 nd direct current isolating switch 22, the automatic arc extinguishing device 31 and the cabinet 41; outgoing line L0, 1 st incoming line L1, 2 nd incoming line L2, insulation junction A0, in-yard garage running rail A1, out-yard garage running rail A2 and positive line running rail A3.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, the directional conduction reflux device of the present invention includes A1 st incoming line L1 and A2 nd incoming line L2 which are respectively connected to a left-side yard internal track A1 and a right-side yard external track A2 of an insulation junction A0, and an outgoing line L0 connected to a negative pole of a traction substation. The device also comprises a1 st incoming line L1 and A2 nd incoming line L2 which are respectively connected with the outer running rail A2 of the yard warehouse at the left side of the insulating junction A0 and the positive line running rail A3 at the right side, and an outgoing line L0 which is connected with the negative electrode of the traction substation. The 1 st incoming line L1 and the 2 nd incoming line L2 are respectively connected with an outgoing line L0 through a1 st diode 11 and a2 nd diode 12. The automatic arc extinguishing device 31 and the direct current isolating switch 21 are respectively connected with the 1 st incoming line L1 and the 2 nd incoming line L2 and are positioned behind the 1 st diode 11 and the 2 nd diode 12.
Referring to fig. 1, the 1 st incoming line L1 and the 2 nd incoming line L2 of the directional conduction reflux device are respectively connected with a yard internal running rail A1 and a yard external running rail A2 on two sides of an insulation junction A0, and are connected with a yard external running rail A2 and a positive line running rail A3 on two sides of the insulation junction A0, and the outgoing line L0 of the directional conduction reflux device is connected with a negative electrode of a traction substation. The 1 st diode 11 and the 2 nd diode 12 are adopted, so that traction reflux on the running rails at two sides of the insulation junction A0 is guaranteed to flow back to the negative pole of the traction substation through independent diode branches in the directional conduction reflux device. When any diode branch breaks down, the direct current isolating switch 21 is closed, so that traction reflux on the running rails at two sides of the insulating junction A0 can flow back to the negative electrode of the traction substation. The automatic arc extinguishing device 31 is used for limiting the rise of the potential difference of the steel rails at the two sides of the insulating junction A0 so as to avoid arc discharge when a train passes. The device can be arranged outdoors or indoors.
Referring to embodiment 1 shown in fig. 2, the 1 st incoming line L1 and the 2 nd incoming line L2 are connected to the outgoing line L0 through the 1 st diode 11 and the 2 nd diode 12, respectively. The automatic arc extinguishing device 31 and the direct current isolating switch 21 are respectively connected with the 1 st incoming line L1 and the 2 nd incoming line L2 and are positioned behind the 1 st diode 11 and the 2 nd diode 12. The 1 st diode 11, the 2 nd diode 12, the automatic arc extinguishing device and the direct current isolating switch 21 are arranged in the cabinet 41, wherein the direct current isolating switch 21 can be electric or manual.
1. Referring to embodiment 2 shown in fig. 3, the 1 st incoming line L1 and the 2 nd incoming line L2 are connected to the outgoing line L0 through the 1 st diode 11 and the 2 nd diode 12, respectively; the automatic arc extinguishing device 31 is connected to the 1 st incoming line L1 and the 2 nd incoming line L2 and is positioned behind the 1 st diode 11 and the 2 nd diode 12. The 1 st direct current isolating switch 21 and the 2 nd direct current isolating switch 22 are respectively connected with the 1 st diode 11 and the 2 nd diode 12 in parallel. The 1 st diode 11, the 2 nd diode 12, the automatic arc extinguishing device, the 1 st direct current isolating switch 21 and the 2 nd direct current isolating switch 22 are arranged in the cabinet 41, wherein the direct current isolating switches can be electric or manual. The device can be arranged outdoors or indoors.
The directional conduction reflux device has the following advantages:
1. the adoption of the double diode branch circuit can ensure that the running rail flows smoothly, and can also ensure that the electric loop of the running rail in the parking lot and the running rail outside the parking lot is completely disconnected, so that the mutual messy string of the traction reflux currents of the running rail in the parking lot, outside the parking lot, the running rail outside the parking lot and the like is avoided.
2. The method can effectively avoid that the transition resistance of the travelling rail at a certain position of the positive line to the ground is reduced, so that the traction reflux current on the travelling rail of the positive line respectively passes through the ground, the travelling rail of the vehicle, the unidirectional conduction device on the access line, the travelling rail of the positive line and the negative pole of the traction substation of the positive line, and a large amount of stray current is formed, thereby reducing the corrosion of the stray current to the metal pipelines and the building structure steel bars near the vehicle;
3. the method can effectively avoid that the transition resistance of the running rail at a certain position outside the parking lot to the ground is reduced, so that the traction reflux current on the running rail outside the parking lot flows back to the negative pole of the traction substation of the parking lot through the ground, the running rail in the parking lot, the unidirectional conduction device between the running rail in the parking lot and the running rail of the line outside the parking lot, and the running rail outside the parking lot, thereby forming a large amount of stray current, and reducing the corrosion of the stray current to metal pipelines and building structural steel bars near the parking lot.
4. The rail grounding wire can effectively solve a series of problems that when the grounding wire is hung on the rail in a yard due to a large amount of stray current leaked from the running rail, the operation of the grounding wire is affected, the rail potential limiting device in the yard frequently acts and the like, the operation safety and reliability are ensured to the greatest extent, and the rail grounding wire is convenient to construct, install, operate, manage and maintain.
The above description is only intended to illustrate some of the components of the directional conduction reflow apparatus of the present invention and is not intended to limit the invention to the specific structure and application scope shown and described, so all the corresponding modifications and equivalents that may be utilized are included in the scope of the invention as claimed.
Claims (6)
1. The directional conduction reflux unit is characterized in that: the device comprises A1 st incoming line (L1) and A2 nd incoming line (L2) which are respectively connected with an inner running rail (A1) of a left yard library and an outer running rail (A2) of a right yard library of an insulating junction (A0), and an outgoing line (L0) connected with a negative electrode of a traction substation; the device also comprises a1 st incoming line (L1) and A2 nd incoming line (L2) which are respectively connected with an external running rail (A2) of the yard warehouse at the left side and a positive running rail (A3) at the right side of the insulating junction (A0), and an outgoing line (L0) which is connected with the negative electrode of the traction substation; the 1 st incoming line (L1) and the 2 nd incoming line (L2) are respectively connected with an outgoing line (L0) through a1 st diode (11) and a2 nd diode (12); the automatic arc extinction device (31) and the direct current isolating switch (21) are respectively connected with a1 st incoming line (L1) and a2 nd incoming line (L2) and are positioned behind the 1 st diode (11) and the 2 nd diode (12); the 1 st diode (11) and the 2 nd diode (12) share a direct current isolating switch (21) and an automatic arc extinguishing device (31).
2. The directional conduction reflow apparatus of claim 1, wherein: the direct current isolating switch (21) is electric or manual.
3. The directional conduction reflow apparatus of claim 1, wherein: the 1 st diode (11), the 2 nd diode (12), the automatic arc extinction device (31) and the direct current isolating switch (21) are arranged in the cabinet body (41).
4. The directional conduction reflux unit is characterized in that: the device comprises A1 st incoming line (L1) and A2 nd incoming line (L2) which are respectively connected with an inner running rail (A1) of a left yard library and an outer running rail (A2) of a right yard library of an insulating junction (A0), and an outgoing line (L0) connected with a negative electrode of a traction substation; the device also comprises a1 st incoming line (L1) and A2 nd incoming line (L2) which are respectively connected with an external running rail (A2) of the yard warehouse at the left side and a positive running rail (A3) at the right side of the insulating junction (A0), and an outgoing line (L0) which is connected with the negative electrode of the traction substation; the 1 st incoming line (L1) and the 2 nd incoming line (L2) are respectively connected with an outgoing line (L0) through a1 st diode (11) and a2 nd diode (12); the automatic arc extinction device (31) is connected with the 1 st incoming line (L1) and the 2 nd incoming line (L2) and is positioned behind the 1 st diode (11) and the 2 nd diode (12); the 1 st direct current isolating switch (21) and the 2 nd direct current isolating switch (22) are respectively connected with the 1 st diode (11) and the 2 nd diode (12) in parallel; the 1 st diode (11) and the 2 nd diode (12) share an automatic arc extinction device (31), and the 1 st direct current isolating switch (21) and the 2 nd direct current isolating switch (22) are respectively connected with the 1 st diode (11) and the 2 nd diode (12) in parallel.
5. The directional conduction reflow apparatus of claim 4, wherein: the 1 st direct current isolating switch (21) and the 2 nd direct current isolating switch (22) are electric or manual.
6. The directional conduction reflow apparatus of claim 4, wherein: the 1 st diode (11), the 2 nd diode (12), the automatic arc extinction device (31), the 1 st direct current isolating switch (21) and the 2 nd direct current isolating switch (22) are arranged in the cabinet body (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810052178.9A CN108162809B (en) | 2018-01-19 | 2018-01-19 | Directional conduction reflux device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810052178.9A CN108162809B (en) | 2018-01-19 | 2018-01-19 | Directional conduction reflux device |
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| Publication Number | Publication Date |
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| CN108162809A CN108162809A (en) | 2018-06-15 |
| CN108162809B true CN108162809B (en) | 2023-07-18 |
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| CN201810052178.9A Active CN108162809B (en) | 2018-01-19 | 2018-01-19 | Directional conduction reflux device |
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| CN109094427B (en) * | 2018-08-23 | 2023-09-22 | 南京铁道职业技术学院 | Subway stray current suppression system and method based on voltage compensation |
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