CN108162803B - Combined directional conduction reflux device - Google Patents
Combined directional conduction reflux device Download PDFInfo
- Publication number
- CN108162803B CN108162803B CN201810052237.2A CN201810052237A CN108162803B CN 108162803 B CN108162803 B CN 108162803B CN 201810052237 A CN201810052237 A CN 201810052237A CN 108162803 B CN108162803 B CN 108162803B
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- Prior art keywords
- incoming line
- diode
- line
- running rail
- automatic arc
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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
- B60M1/02—Details
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The combined directional conduction reflux device can ensure that the running rail is smooth in reflux, can ensure that the yard and the positive running rail are completely disconnected on an electric loop, so as to realize optimization for reducing stray current corrosion, solve a series of problems that the operation of the ground wire is affected due to continuous and serious discharge when the ground wire is hung on a steel rail in the yard, and the frequent action of the steel rail potential limiting device in the yard, ensure safe and reliable operation to the greatest extent, and facilitate construction, installation, operation management and maintenance. The device comprises a1 st incoming line and a3 rd incoming line which are respectively connected with a positive line running rail on the right side of a1 st insulating junction, a running rail outside a yard warehouse on the left side of a2 nd insulating junction, a2 nd incoming line connected with the running rail between the two insulating junctions, and an outgoing line connected with the negative electrode of a traction substation; the 1 st incoming line is connected with the 2 nd incoming line, and the 2 nd incoming line is connected with the 3 rd incoming line through a1 st automatic arc extinction device and a2 nd automatic arc extinction device respectively; the 1 st automatic arc extinction device is connected in parallel with the 1 st diode, and the 2 nd diode is connected between the 1 st diode and the outgoing line; the direct current isolating switch is connected across the two ends of the 1 st diode and the 2 nd diode.
Description
Technical Field
The invention relates to a combined 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 section 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.
In order to prevent stray current corrosion, an insulating junction is generally arranged between a parking lot and a positive line running rail (i.e. on an access field line), and a unidirectional conduction device is arranged, so that current in the running rail can flow in only 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 is shown in fig. 4, and the arrangement mode of the unidirectional conduction device on the exit and entrance line of the 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.
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, from the aspects of safe and reliable operation, convenient construction and installation, operation management and maintenance, the combined directional conduction reflux device is provided so as to realize the optimization of reducing stray current corrosion, and solve a series of problems of continuous and serious discharge when a rail is hung on a ground wire in a yard, influence on the operation of the ground wire, frequent actions of the rail potential limiting device in the yard and the like.
Disclosure of Invention
The invention aims to solve the technical problems of providing a combined directional conduction reflux device, which can ensure that the running rail is smooth in reflux, can also ensure that a parking lot and a positive running rail are completely disconnected on an electric loop, changes the mode of unidirectional conduction of the parking lot and the positive running rail loop through a conventional unidirectional conduction device so as to realize optimization of reducing stray current corrosion, solves a series of problems that the operation of the ground wire is influenced by continuous and serious discharge when the ground wire is hung on a steel rail in the parking lot, the frequent action of the steel rail potential limiting device in the parking lot and the like, ensures safe and reliable operation to the greatest extent, and is convenient for construction, installation, operation management and maintenance.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention relates to a combined directional conduction reflux device, which is characterized in that: the device comprises a1 st incoming line and a3 rd incoming line which are respectively connected with a positive line running rail on the right side of a1 st insulating junction, a running rail outside a yard warehouse on the left side of a2 nd insulating junction, a2 nd incoming line connected with the running rail between the two insulating junctions, and an outgoing line connected with the negative electrode of a traction substation; the 1 st incoming line is connected with the 2 nd incoming line, and the 2 nd incoming line is connected with the 3 rd incoming line through a1 st automatic arc extinction device and a2 nd automatic arc extinction device respectively; the 1 st automatic arc extinction device is connected in parallel with the 1 st diode, and the 2 nd diode is connected between the 1 st diode and the outgoing line; the direct current isolating switch is connected across the two ends of the 1 st diode and the 2 nd diode.
The invention relates to a combined directional conduction reflux device, which is characterized in that: the device comprises a1 st incoming line and a3 rd incoming line which are respectively connected with a positive line running rail on the right side of a1 st insulating junction, a running rail outside a yard warehouse on the left side of a2 nd insulating junction, a2 nd incoming line connected with the running rail between the two insulating junctions, and an outgoing line connected with the negative electrode of a traction substation; the 1 st incoming line is connected with the 2 nd incoming line, and the 2 nd incoming line is connected with the 3 rd incoming line through a1 st automatic arc extinction device and a2 nd automatic arc extinction device respectively; the 1 st diode and the direct current isolating switch are connected in parallel with the 1 st automatic arc extinction device and are positioned between the 1 st incoming line and the outgoing line.
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 combined directional conduction reflow apparatus according to the present invention;
FIG. 2 is a schematic diagram of a combined directional conduction reflow apparatus according to embodiment 1 of the present invention;
FIG. 3 is a schematic diagram of a combined 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 an arrangement of unidirectional conducting devices on a yard exit/entrance line.
The components and corresponding indicia are shown: the 1 st diode 11, the 2 nd diode 12, the direct current isolating switch 21, the 1 st automatic arc extinguishing device 31, the 2 nd automatic arc extinguishing device 32 and the cabinet 41; outgoing line L0, 1 st incoming line L1, 2 nd incoming line L2, 3 rd incoming line L3, 1 st insulating junction B1, 2 nd insulating junction B2, yard library outside running rail A3, running rail A2 between two insulating junctions, positive line running rail A1.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, two insulation junctions are provided on the access line section running rail, the distance between the two insulation junctions is generally not greater than 25 meters, and an electrical section provided between the contact line yard and the positive line is located between the two insulation junctions.
Referring to embodiment 1 shown in fig. 1 and 2, the combined directional conduction and reflow apparatus of the present invention includes A1 st incoming line L1 and A3 rd incoming line L3 connected to a positive line running rail A1 on the right side of A1 st insulating junction B1, A2 nd incoming line L3 connected to an external running rail A3 of a yard library on the left side of A2 nd insulating junction B2, A2 nd incoming line L2 connected to a running rail A2 between the two insulating junctions, and an outgoing line L0 connected to a negative electrode of a traction substation, respectively. The 1 st incoming line L1 is connected with the 2 nd incoming line L2, the 2 nd incoming line L2 is connected with the 3 rd incoming line L3 through the 1 st automatic arc extinguishing device 31 and the 2 nd automatic arc extinguishing device 32 respectively. The 1 st automatic arc extinguishing device 31 is connected in parallel with the 1 st diode 11, and the 2 nd diode 12 is connected between the 1 st diode 11 and the outgoing line L0; the dc isolating switch 21 is connected across the 1 st diode 11 and the 2 nd diode 12. The 1 st diode 11, the 2 nd diode 12, the direct current isolating switch 21, the 1 st automatic arc extinguishing device 31 and the 2 nd automatic arc extinguishing device 32 are arranged in the cabinet 41, wherein the direct current isolating switch 21 is electric or manual.
Referring to embodiment 2 shown in fig. 1 and 3, the combined directional conduction and reflow apparatus of the present invention includes A1 st incoming line L1 and A3 rd incoming line L3 respectively connected to a positive line running rail A1 on the right side of A1 st insulating junction B1, A2 nd incoming line L2 connected to a running rail A2 between two insulating junctions, and an outgoing line L0 connected to a negative electrode of a traction substation. The 1 st incoming line L1 is connected with the 2 nd incoming line L2, the 2 nd incoming line L2 is connected with the 3 rd incoming line L3 through the 1 st automatic arc extinguishing device 31 and the 2 nd automatic arc extinguishing device 32 respectively. The 1 st diode 11 and the direct current isolating switch 21 are connected in parallel with the 1 st automatic arc extinction device 31 and are positioned between the 1 st incoming line L1 and the outgoing line L0. The 1 st diode 11, the direct current isolating switch 21, the 1 st automatic arc extinguishing device 31 and the 2 nd automatic arc extinguishing device 32 are arranged in the cabinet 41, wherein the direct current isolating switch 21 is electric or manual.
Referring to fig. 1, A1 st incoming line L1, A2 nd incoming line L2 and A3 rd incoming line L3 of the combined directional conduction reflux device are respectively connected with A1 st insulation junction B1 right positive line running rail A1, A2 nd insulation junction B2 left parking garage outside running rail A3 and a running rail A2 between the two insulation junctions, and a combined directional conduction reflux device outgoing line L0 is connected with a traction substation negative electrode. The adoption of the 1 st diode 11 and the 2 nd diode 12 ensures that traction reflux on the running rails at two sides of the insulating junction B1 respectively flows back to the negative pole of the traction substation through independent diode branches in the combined 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 1 st insulating junction B1 can flow back to the negative pole of the traction substation. The 1 st automatic arc extinguishing device 31 and the 2 nd automatic arc extinguishing device 32 are used for respectively limiting the rise of the potential difference of the steel rails at the two sides of the 1 st insulating junction B1 and the 2 nd insulating junction B2 so as to avoid arc discharge when a train passes through.
The combined directional conduction reflux device has the following advantages:
1. the method can ensure that the running rail flows smoothly in a backflow way, and can ensure that the parking lot and the positive running rail are completely disconnected on an electric loop, so that the mutual mess of traction backflow currents of the parking lot and the positive running rail 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 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 foregoing is illustrative of the present invention and is not to be construed as limited to the specific constructions and arrangements shown and described, but rather as all possible modifications and equivalents may be utilized within the scope of the invention as defined by the appended claims.
Claims (6)
1. Combined directional conduction reflux unit, characterized by: the device comprises A1 st incoming line (L1) and A3 rd incoming line (L3) which are respectively connected with A1 st insulation junction (B1) right positive line running rail (A1) and A2 nd insulation junction (B2) left side parking lot outside running rail (A3), A2 nd incoming line (L2) which is connected with the running rail (A2) between the two insulation junctions, and an outgoing line (L0) which is connected with the negative electrode of a traction substation; the 1 st incoming line (L1) is connected with the 2 nd incoming line (L2), the 2 nd incoming line (L2) is connected with the 3 rd incoming line (L3) through a1 st automatic arc extinguishing device (31) and a2 nd automatic arc extinguishing device (32) respectively; the 1 st automatic arc extinguishing device (31) is connected in parallel with the 1 st diode (11), and the 2 nd diode (12) is connected between the 1 st diode (11) and the outgoing line (L0); the direct current isolating switch (21) is connected across the two ends of the 1 st diode (11) and the 2 nd diode (12).
2. The combined directional conduction and reflow apparatus of claim 1, wherein: the 1 st diode (11), the 2 nd diode (12), the direct current isolating switch (21), the 1 st automatic arc extinguishing device (31) and the 2 nd automatic arc extinguishing device (32) are arranged in the cabinet body (41).
3. The combined directional conduction and reflow apparatus of claim 2, wherein: the direct current isolating switch (21) is electric or manual.
4. Combined directional conduction reflux unit, characterized by: the device comprises A1 st incoming line (L1) and A3 rd incoming line (L3) which are respectively connected with A1 st insulation junction (B1) right positive line running rail (A1) and A2 nd insulation junction (B2) left side parking lot outside running rail (A3), A2 nd incoming line (L2) which is connected with the running rail (A2) between the two insulation junctions, and an outgoing line (L0) which is connected with the negative electrode of a traction substation; the 1 st incoming line (L1) is connected with the 2 nd incoming line (L2), the 2 nd incoming line (L2) is connected with the 3 rd incoming line (L3) through a1 st automatic arc extinguishing device (31) and a2 nd automatic arc extinguishing device (32) respectively; the 1 st diode (11) and the direct current isolating switch (21) are connected in parallel with the 1 st automatic arc extinction device (31) and are positioned between the 1 st incoming line (L1) and the outgoing line (L0).
5. The combined directional conduction and reflow apparatus of claim 4, wherein: the 1 st diode (11), the direct current isolating switch (21), the 1 st automatic arc extinguishing device (31) and the 2 nd automatic arc extinguishing device (32) are arranged in the cabinet body (41).
6. The combined directional conduction and reflow apparatus of claim 4, wherein: the direct current isolating switch (21) is electric or manual.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810052237.2A CN108162803B (en) | 2018-01-19 | 2018-01-19 | Combined directional conduction reflux device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810052237.2A CN108162803B (en) | 2018-01-19 | 2018-01-19 | Combined directional conduction reflux device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108162803A CN108162803A (en) | 2018-06-15 |
| CN108162803B true CN108162803B (en) | 2023-07-18 |
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| CN201810052237.2A Active CN108162803B (en) | 2018-01-19 | 2018-01-19 | Combined directional conduction reflux device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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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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| CN108162803A (en) | 2018-06-15 |
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