CN110861539A - Main wiring structure of hub traction substation - Google Patents
Main wiring structure of hub traction substation Download PDFInfo
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- CN110861539A CN110861539A CN201911284270.9A CN201911284270A CN110861539A CN 110861539 A CN110861539 A CN 110861539A CN 201911284270 A CN201911284270 A CN 201911284270A CN 110861539 A CN110861539 A CN 110861539A
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a main wiring structure of a hub traction substation, which comprises two external power supplies, two groups of traction transformers, a changeover switch unit, a plurality of feedback lines and two groups of buses which are independently arranged, wherein one group of buses is powered by one power supply, the other group of buses is powered by the other power supply, and each group of buses are provided with the same number of the feedback lines so as to form two groups of independent power supply equipment which are physically isolated from each other and are electrically separated; the feeder lines all pass through the switch unit (7) and the corresponding switches (8); and the feeders are provided with switches (8) to realize the switching between the two groups of power supply equipment through the switching of the switches. According to the main wiring structure of the hub traction substation, two groups of mutually independent power supply equipment are arranged, and physical isolation and electrical separation are realized, so that when one group of equipment breaks down or is struck by lightning, the other group of equipment can be rapidly put into operation without being affected, normal power supply is recovered, and power supply reliability is improved.
Description
Technical Field
The invention belongs to the technical field of power supply and transformation of electrified railways, and particularly relates to a main wiring structure of a hub traction substation.
Background
With the rapid development of high-speed railways, the requirements of the operation of the electrified railways on traction power supply systems are higher and higher, and especially for junction type traction substations which simultaneously supply power to a plurality of lines, the power supply reliability of the junction type traction substations is concerned and emphasized by operation units.
In the prior art, in order to ensure reliable power supply of an electrified railway traction substation, two incoming lines of the general traction substation are independent power supplies, 2 groups of traction power transformers in the substation adopt a standby mode, equipment in the substation is automatically switched, and the situation that the operation incoming line is in voltage loss or the operation transformer fails can be automatically switched to the standby transformer is ensured. As shown in fig. 1, in the form of a main wiring structure of a traction substation in the prior art, when one incoming line fails, the other incoming line can work, and when one power supply fails, the other group of power supplies can be switched to work.
However, this structure has drawbacks: firstly, when one bus fails, a part of feeder lines of a traction substation quit operation due to equipment failure; secondly, two buses are supplied with power by the same traction transformer, so that electrical connection exists between the two buses, and the whole bus is possibly subjected to destructive impact when a lightning stroke is encountered. When the two faults occur, the repair is required to be carried out completely, the period required by the repair is long, and the line needs to adopt cross-area power supply and limit the traveling crane to recover part of transport organization, so that the transport organization of the line is influenced; if the traction substation in the important railway junction has the fault, the influence range is further expanded, and the influence on the whole junction area is self-evident.
Disclosure of Invention
Aiming at the defects or improvement requirements in the prior art, the invention provides a main wiring structure of a hub traction substation, which adopts two groups of relatively independent traction power supply equipment to operate in a main mode and a standby mode and realizes physical isolation and electrical separation; when one group of traction power supply equipment breaks down, the other group of equipment can be unaffected and can be put into operation quickly, and therefore the influence on transportation organization in a hub is reduced.
In order to achieve the above object, the present invention provides a main connection structure of a hub traction substation, which comprises two external power supplies and two groups of traction transformers, and is characterized by further comprising a changeover switch unit, a plurality of feedback lines, and a first group of buses and a second group of buses which are independently arranged, wherein the first group of buses are powered by one external power supply and one group of traction transformers, and the second group of buses are powered by the other external power supply and one group of traction transformers, so as to form two groups of independent power supply devices which are physically isolated and electrically separated from each other;
each group of buses is of a single bus or single bus sectional wiring structure, the number of sections of the two groups of buses is the same, and each section of bus of the first group of buses and each section of bus of the second group of buses are arranged in a one-to-one correspondence manner; each group of buses is provided with the same number of feeders, the feeders of the second group of buses are arranged in one-to-one correspondence with the feeders of the first group of buses, the corresponding feeders in the two groups of buses are converged into a leading-out feeder, each feeder of the two groups of buses is provided with a switch, and each leading-out feeder is also provided with a switch so as to realize the switching of the two groups of buses through the switches.
Furthermore, a bus coupler is arranged between each section of bus corresponding to the first group of buses and the second group of buses one to one.
Furthermore, all be equipped with circuit breaker and isolator on the bus tie.
Furthermore, each group of traction transformers respectively leads one path of power supply to each section of bus of the two groups of buses.
Furthermore, a circuit breaker is arranged on a loop for supplying power to each group of transformers and each section of bus.
Furthermore, the reversing switch unit is arranged in the traction substation or on the contact network.
Further, each group of the traction transformers adopts a single-phase junction line, a three-phase V/V or V/x junction line or a three-phase and two-phase balance junction line.
Further, the first group of buses comprises a first bus and a second bus, the second group of buses comprises a third bus and a fourth bus, the first bus is connected with a fifth feeder and a seventh feeder, the second bus is connected with a ninth feeder and an eleventh feeder, the third bus is connected with a sixth feeder and an eighth feeder, and the fourth bus is connected with a tenth feeder and a twelfth feeder.
Further, the fifth feeder and the sixth feeder are connected to the first feeder, the seventh feeder and the eighth feeder are connected to the second feeder, the ninth feeder and the tenth feeder are connected to the third feeder, and the eleventh feeder and the twelfth feeder are connected to the fourth feeder.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) the main wiring structure of the hub traction substation adopts two groups of relatively independent traction power supply equipment to operate in a main mode and a standby mode, and physical isolation and electrical separation are realized; when one group of traction power supply equipment breaks down, the other group of equipment can be unaffected and can be put into operation quickly, and therefore the influence on transportation organization in a hub is reduced.
(2) According to the main wiring structure of the hub traction substation, the parallel connection structure of the first bus coupler and the second bus coupler is arranged, and the grid-connected switching function of two groups of traction power supply equipment can be realized in the daily operation process, so that the operation time of completely disconnecting one group of equipment from completely connecting the other group of equipment can be saved, the power supply flexibility is improved, and the operation and maintenance are convenient.
(3) According to the main wiring structure of the hub traction substation, the first bus coupler and the second bus coupler are respectively provided with the circuit breaker and the isolating switch, when equipment in the first traction substation unit is normally powered on, the circuit breaker and the isolating switch are disconnected, and the electrical connection between the two groups of buses is cut off, so that the other group of equipment is not affected when one group of equipment is struck by lightning.
(4) According to the main wiring structure of the hub traction substation, each group of traction transformers can supply power to each section of bus, and the grid-connected switching function of two groups of traction power supply equipment can be realized in the daily operation process, so that the operation time of completely disconnecting one group of equipment from completely connecting the other group of equipment can be saved, the power supply flexibility is improved, and the operation and maintenance are convenient.
(5) According to the main wiring structure of the hub traction substation, the circuit breaker is arranged on the loop of each group of traction transformers for supplying power to each section of bus, and when the equipment in the first traction power supply unit supplies power normally, the circuit breaker is disconnected to cut off the electrical connection between the first traction power supply equipment and the second traction power supply equipment, so that the other group of equipment is not affected when one group of equipment is struck by lightning.
Drawings
FIG. 1 is a schematic diagram of a main wiring structure of a traction substation in the prior art;
FIG. 2 is a schematic diagram of a main wiring structure of a junction traction substation according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a main wiring structure of a junction traction substation according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram of a main wiring structure of a junction traction substation according to a third embodiment of the present invention;
FIG. 5 is a schematic diagram of a main wiring structure of a hub traction substation according to a fourth embodiment of the present invention;
in all the figures, the same reference numerals denote the same features, in particular: 1-a first traction power transformation unit and 2-a second traction power transformation unit; 101-a first incoming line, 102-a first traction transformer, 103-a first bus, 104-a second bus, 105-a first branch, 106-a second branch, 107-a third branch, 108-a fourth branch; 201-a second incoming line, 202-a second traction transformer, 203-a third bus, 204-a fourth bus, 205-a fifth branch, 206-a sixth branch, 207-a seventh branch, 208-an eighth branch; 3-a first feeder, 4-a second feeder, 5-a third feeder, 6-a fourth feeder, 301-a fifth feeder, 302-a sixth feeder, 401-a seventh feeder, 402-an eighth feeder, 501-a ninth feeder, 502-a tenth feeder, 601-an eleventh feeder, 602-a twelfth feeder; 7-parallel switch unit, 8-switch, 9-breaker, 10-first bus connector and 11-second bus connector.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 2 is a schematic diagram of a main wiring structure of a junction traction substation according to a first embodiment of the present invention. As shown in fig. 2, the traction substation of the present invention includes a first traction power supply unit 1 and a second traction power supply unit 2, wherein the first traction power supply unit 1 and the second traction power supply unit 2 are independently disposed and respectively installed in a same traction substation, and are respectively powered by one external power supply; the first traction power supply unit 1 is provided with a first inlet wire 101 and a first traction transformer 102, and the second traction power supply unit 2 is provided with a second inlet wire 201 and a second traction transformer 202; preferably, the first traction transformer 102 and the second traction transformer 202 are single-phase connection wires, three-phase V/V or V/x connection wires, and three-phase-two-phase balance connection wires.
A first group of buses are arranged in the first traction power supply unit 1, the first group of buses comprise a first bus 103 and a second bus 104, a second group of buses are arranged in the second traction power supply unit 2, the second group of buses comprise a third bus 203 and a fourth bus 204, the first group of buses are supplied with power through one path of external power supply and a group of traction transformers, and the second group of buses are supplied with power through the other path of external power supply and a group of traction transformers, so that the first group of buses and the second group of buses are not in electrical contact, when lightning strike occurs, the first group of buses and the second group of buses cannot be influenced mutually, when one group of buses are in fault due to the lightning strike, the other group of buses can continue to supply power, and all; and there is not the shared bus between first traction power supply unit 1 and the second traction power supply unit 2, so there is not physical connection between first traction power supply unit and the second traction power supply unit, when bus or other equipment trouble in first traction substation unit 1, can not influence the realization of second traction power supply unit 2 function, and second traction power supply unit 2 can independently work, vice versa.
The first bus 103, the second bus 104, the third bus 203 and the fourth bus 204 are all provided with two feeder lines, the first bus 103 is connected with a fifth feeder line 301 and a seventh feeder line 401, the second bus 104 is connected with a ninth feeder line 501 and an eleventh feeder line 601, the third bus 203 is connected with a sixth feeder line 302 and an eighth feeder line 402, the fourth bus 204 is connected with a tenth feeder line 502 and a twelfth feeder line 602, the 8 feeder lines are all arranged in parallel and pass through the changeover switch unit 7, each feeder line is provided with a switch 8 at the changeover switch unit 7, and the on/off of the 8 feeder lines is controlled by the switch 8;
the main wiring structure of the central link traction substation also comprises four feeder lines, namely a first feeder line 3, a second feeder line 4, a third feeder line 5 and a fourth feeder line 6, wherein a fifth feeder line 301 and a sixth feeder line 302 are connected to the first feeder line 3, and a seventh feeder line 401 and an eighth feeder line 402 are connected to the second feeder line 4; the ninth feeder 501 and the tenth feeder 502 are connected to the third feeder 5, and the eleventh feeder 601 and the twelfth feeder 602 are connected to the fourth feeder 6, i.e. the power supply of the same feeder is from two bus bars.
The four feed lines are provided with switches 8.
The switch 8 on the four feeder lines and the 8 switches on the parallel switch unit 7 jointly realize the control of the access and the exit of the two mutually independent power transformation units. In the wiring structure of the first embodiment, when an equipment failure or a lightning strike occurs in the first traction power transformation unit 1, after the first traction power transformation unit 1 is completely withdrawn, that is, after the switches corresponding to the first bus 103 and the second bus 104 are turned off, the second traction power transformation unit 2 is connected, that is, the switches corresponding to the third bus 203 and the fourth bus 204 are turned on. Through the setting of the wiring structure of first embodiment, can avoid being affected and lead to needing whole maintenance and delay the power supply because of a set of equipment trouble or meet with the thunderbolt and another group's equipment, only need can accomplish reserve power supply through controlling the switch switching between two sets of transformer substations that do not have physical connection and electrical connection, save time reduces the influence to railway transportation organization.
Preferably, the parallel switch unit 7 is provided in the traction substation or on the contact network.
Preferably, a circuit breaker is arranged on a loop for supplying power to each group of traction transformers and each section of bus.
Fig. 3 is a schematic diagram of a main wiring structure of a junction traction substation according to a second embodiment of the present invention. As shown in fig. 3, the main connection structure of the traction substation in the second embodiment also includes two groups of traction substation units that are independently arranged, and the arrangement of the first incoming line 101, the first traction transformer 102, the second incoming line 201, the second traction transformer 202, the first bus 103, the second bus 104, the parallel switch unit 7, the first feeder line 3, the second feeder line 4, the third feeder line 5, the fourth feeder line 6, the changeover switch unit 7, and the switch is the same as that in the first embodiment, and the first bus coupler 10 and the second bus coupler 11 are added in the second embodiment.
The first bus coupler 10 is arranged between the first bus 103 and the third bus 203, the second bus coupler 11 is arranged between the second bus 104 and the fourth bus 204, and the first bus coupler 10 and the second bus coupler 11 enable two groups of buses to be connected in parallel, so that one group of equipment can be connected into the other group of equipment after being not required to be completely disconnected. Because of parallel connection, another group of good equipment can be accessed immediately after the fault occurs, and the problem of short circuit does not occur, so that the time for completely disconnecting one group of equipment from the operation of accessing the other group of equipment can be saved.
In order to avoid the occurrence of the amplification influence caused by parallel connection and lightning stroke, the first bus coupler 10 and the second bus coupler 11 are respectively provided with the circuit breaker 9 and the isolating switch, when the equipment in the first traction power transformation unit 1 is normally powered on, the circuit breaker 9 is opened, the isolating switch is disconnected, and the electrical connection between the two groups of buses is cut off, so that the other group of equipment is not influenced when one group of equipment is subjected to lightning stroke.
Fig. 4 is a schematic diagram of a main wiring structure of a junction traction substation according to a third embodiment of the present invention. As shown in fig. 4, the main wiring structure of the traction substation in the third embodiment also includes two sets of traction substation units that are independently arranged, and the arrangement of the first incoming line 101, the first traction transformer 102, the second incoming line 201, the second traction transformer 202, the first bus 103, the second bus 104, the parallel switch unit 7, the first feeder line 3, the second feeder line 4, the third feeder line 5, the fourth feeder line 6, the parallel switch unit 7, and the switch is the same as that in the first embodiment.
The third embodiment differs from the first embodiment in that the first embodiment is a wiring structure of two sets of physical and electrical isolation arranged based on a single bus bar structure, and the third embodiment is a wiring structure of two sets of mutually independent transformation substations arranged based on a double bus bar structure. The second traction power transformation unit 2 does not share a bus with the first traction power transformation unit 1, so that physical connection does not exist, and when the first traction power transformation unit 1 or the second traction power transformation unit 2 fails, the other group can supply power.
The first traction transformer 102 is provided with two lead leading-out wires which respectively correspond to the first bus 103 and the second bus 104, the lead corresponding to the first bus 103 is provided with two branches which are respectively a first branch 105 and a second branch 106, one end of the first branch 105 is connected with the first traction transformer 102, the other end of the first branch is connected with the first bus 103, one end of the second branch 106 is connected with the first traction transformer 102, and the other end of the second branch is connected with the third bus 203; the conducting wire corresponding to the second bus 104 is provided with two branches, namely a third branch 107 and a fourth branch 108, wherein one end of the third branch 107 is connected with the first traction transformer 102, the other end of the third branch is connected with the second bus 104, one end of the fourth branch 108 is connected with the first traction transformer 102, and the other end of the fourth branch is connected with the fourth bus 204.
The second traction transformer 202 is provided with two lead-out wires which are led out to respectively correspond to the third bus 203 and the fourth bus 204, the lead corresponding to the third bus 203 is provided with two branches which are respectively a fifth branch 205 and a sixth branch 206, one end of the fifth branch 205 is connected with the second traction transformer 202, the other end of the fifth branch is connected with the third bus 203, one end of the sixth branch 206 is connected with the second traction transformer 202, and the other end of the sixth branch is connected with the first bus 103; the conducting wire corresponding to the fourth bus 204 is provided with two branches, namely a seventh branch 207 and an eighth branch 208, wherein one end of the seventh branch 207 is connected with the second traction transformer 202, the other end of the seventh branch is connected with the fourth bus 204, one end of the eighth branch 208 is connected with the second traction transformer 202, and the other end of the eighth branch is connected with the second bus 104. Through the connection of the double buses, the two groups of buses are connected in parallel, so that one group of equipment can be accessed after the other group of equipment is not required to be completely disconnected. Because of parallel connection, another group of good equipment can be accessed immediately after the fault occurs, and the problem of short circuit does not occur, so that the time for completely disconnecting one group of equipment from the operation of accessing the other group of equipment can be saved.
The first branch 105, the second branch 106, the third branch 107, the fourth branch 108, the fifth branch 205, the sixth branch 206, the seventh branch 207 and the eighth branch 208 are all provided with circuit breakers, and when the equipment in the first traction transformation unit 1 is normally powered, the circuit breaker 9 is opened to cut off the electrical connection between the two groups of buses, so that when one group of equipment is struck by lightning, the other group of equipment is not affected.
The bus is a single bus or a single bus segmented connection, fig. 2 to 4 are structures in which the bus is divided into two sections, but not limited to the structure of dividing the bus into two sections, fig. 5 shows a structure in which the bus is divided into three sections, and the bus included in the invention is a single bus or a bus divided into a plurality of sections.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A main wiring structure of a hub traction substation comprises two external power supplies, two groups of traction transformers and is characterized by further comprising a changeover switch unit, a plurality of feedback lines, a first group of buses and a second group of buses, wherein the first group of buses and the second group of buses are independently arranged;
each group of buses is of a single bus or single bus sectional wiring structure, the number of sections of the two groups of buses is the same, and each section of bus of the first group of buses and each section of bus of the second group of buses are arranged in a one-to-one correspondence manner; each group of buses is provided with the same number of feeders, the feeders of the second group of buses are arranged in one-to-one correspondence with the feeders of the first group of buses, the corresponding feeders in the two groups of buses are converged into a leading-out feeder, each feeder of the two groups of buses is provided with a switch, and each leading-out feeder is also provided with a switch so as to realize the switching of the two groups of buses through the switches.
2. A hub traction substation main wiring structure according to claim 1, wherein a bus-tie is provided between each section of bus bar corresponding to the first set of bus bars and the second set of bus bars.
3. A hub traction substation main wiring structure according to claim 2, wherein the bus couplers are provided with circuit breakers and disconnectors.
4. A hub traction substation main wiring structure according to claim 1, wherein each group of traction transformers separately routes a power supply to each of the two groups of busbars.
5. A main wiring structure of a hub traction substation according to any one of claims 1 to 4, wherein a circuit breaker is provided on the loop for supplying power to each group of transformers and each section of bus.
6. A hub traction substation main wiring structure according to claim 5, wherein the changeover switch unit is provided in the traction substation or on the contact network.
7. A hub traction substation main connection structure according to claim 6, wherein each group of said traction transformers uses single phase connection, three phase V/V or V/x connection or three phase-two phase balanced connection.
8. A hub traction substation main wiring structure according to claim 1, characterized in that the first group of bus bars comprises a first bus bar (103) and a second bus bar (104), the second group of bus bars comprises a third bus bar (203) and a fourth bus bar (204), the first bus bar (103) is connected with a fifth feeder line (301) and a seventh feeder line (401), the second bus bar (104) is connected with a ninth feeder line (501) and an eleventh feeder line (601), the third bus bar (203) is connected with a sixth feeder line (302) and an eighth feeder line (402), and the fourth bus bar (204) is connected with a tenth feeder line (502) and a twelfth feeder line (602).
9. A terminal traction substation main wiring structure according to claim 8, wherein the fifth feeder (301) and the sixth feeder (302) are connected to the first feeder (3), the seventh feeder (401) and the eighth feeder (402) are connected to the second feeder (4), the ninth feeder (501) and the tenth feeder (502) are connected to the third feeder (5), and the eleventh feeder (601) and the twelfth feeder (602) are connected to the fourth feeder (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911284270.9A CN110861539A (en) | 2019-12-13 | 2019-12-13 | Main wiring structure of hub traction substation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911284270.9A CN110861539A (en) | 2019-12-13 | 2019-12-13 | Main wiring structure of hub traction substation |
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| CN110861539A true CN110861539A (en) | 2020-03-06 |
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| CN201911284270.9A Pending CN110861539A (en) | 2019-12-13 | 2019-12-13 | Main wiring structure of hub traction substation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113859057A (en) * | 2021-09-23 | 2021-12-31 | 中铁第四勘察设计院集团有限公司 | High-speed magnetic levitation power supply system |
-
2019
- 2019-12-13 CN CN201911284270.9A patent/CN110861539A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113859057A (en) * | 2021-09-23 | 2021-12-31 | 中铁第四勘察设计院集团有限公司 | High-speed magnetic levitation power supply system |
| CN113859057B (en) * | 2021-09-23 | 2023-03-24 | 中铁第四勘察设计院集团有限公司 | High-speed magnetic levitation power supply system |
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