CN218919940U - Laying arrangement structure of parallel cable in tunnel - Google Patents
Laying arrangement structure of parallel cable in tunnel Download PDFInfo
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- CN218919940U CN218919940U CN202223091729.3U CN202223091729U CN218919940U CN 218919940 U CN218919940 U CN 218919940U CN 202223091729 U CN202223091729 U CN 202223091729U CN 218919940 U CN218919940 U CN 218919940U
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Abstract
The utility model discloses a laying arrangement structure of parallel cables in a tunnel, and relates to the technical field of power transmission of power systems. The device comprises a tunnel, four layers of bracket groups, a channel and a cable line; the four-layer bracket group comprises a first-layer bracket group, a second-layer bracket group, a third-layer bracket group and a fourth-layer bracket group from bottom to top; the first layer of bracket set, the second layer of bracket set, the third layer of bracket set and the fourth layer of bracket set all comprise a left bracket and a right bracket; the cabling comprises a first return 500kV cabling, a second return 500kV cabling, a first return 220kV cabling and a second return 220kV cabling. The utility model can safely and reliably arrange the parallel cable in the tunnel, and realizes the safe operation of the two-circuit 500kV parallel cable line and the two-circuit 220kV parallel cable line.
Description
Technical Field
The utility model relates to the technical field of power transmission of power systems, in particular to a laying arrangement structure of parallel cables in a tunnel.
Background
With the rapid development of cities, the urban scale is larger and larger, and in order to enable cities and towns to have good urban appearance, cable transmission is increasingly emphasized; the cable is different from the electric wires which are intricate in the air, the cable avoids the visual unattractive appearance and the occupation of space, and has the advantages of good corrosion resistance, waterproofness and the like because the cable is laid underground, and the maintenance of the cable is less than that of the common electric wires, so that the cable has wider application prospect in urban power grids; the same-phase multiple cables are connected in parallel, so that the transmission capacity of a single-circuit cable transmission line is effectively improved; meanwhile, the device can be well matched with the transmission capacity of an overhead transmission line, and is an important means for realizing the ground entering of the overhead transmission line.
There is still a large blank area in the research of high-voltage parallel cables at home and abroad, and the parallel cable arrangement structure has important influence on limiting the asymmetry of electrical parameters and improving the load utilization rate of parallel cable lines.
It is therefore necessary to develop a layout of the parallel cables in the tunnel.
Disclosure of Invention
The utility model aims to overcome the defects of the background technology and provide a laying arrangement structure of parallel cables in a tunnel.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: the utility model provides a lay arrangement structure of parallel cable in tunnel which characterized in that: the device comprises a tunnel, four layers of bracket groups symmetrically arranged on the inner wall of the tunnel, channels positioned between the four layers of bracket groups and cable lines arranged on each layer of bracket group; the four-layer bracket group comprises a first-layer bracket group, a second-layer bracket group, a third-layer bracket group and a fourth-layer bracket group from bottom to top;
the first layer of bracket set, the second layer of bracket set, the third layer of bracket set and the fourth layer of bracket set all comprise a left bracket and a right bracket;
the cable line comprises a first return 500kV cable line laid on a left support of the first layer support group and a left support of the second layer support group, a second return 500kV cable line laid on a right support of the first layer support group and a right support of the second layer support group, a first return 220kV cable line laid on a left support of the third layer support group and a left support of the fourth layer support group, and a second return 220kV cable line laid on a right support of the third layer support group and a right support of the fourth layer support group.
In the above technical scheme, the first 500kV back cable line comprises two groups of first back delta-shaped cable groups, one group of first back delta-shaped cable groups is laid on a left bracket of the first layer bracket group, and the other group of first back delta-shaped cable groups is laid on a left bracket of the second layer bracket group;
the second back 500kV cable circuit comprises two groups of second back delta-shaped cable groups, one group of second back delta-shaped cable groups are laid on a right bracket of the first layer of bracket group, and the other group of second back delta-shaped cable groups are laid on a right bracket of the second layer of bracket group;
the first back 220kV cable line comprises two first back-line cable groups, wherein one first back-line cable group is laid on a left bracket of a third layer bracket group, and the other first back-line cable group is laid on a left bracket of a fourth layer bracket group;
the second-circuit 220kV cable circuit comprises two groups of second-circuit linear cable groups, one group of second-circuit linear cable groups is laid on a right support of the third-layer support group, and the other group of second-circuit linear cable groups is laid on a right support of the fourth-layer support group.
In the above technical scheme, the first reverse delta-shaped cable set and the second reverse delta-shaped cable set both comprise two horizontally arranged cables and one cable positioned above the middle parts of the two horizontally arranged cables; the first back-line cable group and the second back-line cable group both comprise three cables which are horizontally arranged.
In the above technical solution, the phase sequence arrangements of the cables of the first reverse delta-shaped cable set laid on the left bracket of the first layer bracket set and the second reverse delta-shaped cable set laid on the right bracket of the first layer bracket set are a, b positioned on the left side of a, and c positioned above a and b; the phase sequences of the cables of the first reverse delta-shaped cable group laid on the left bracket of the second layer bracket group and the second reverse delta-shaped cable group laid on the right bracket of the second layer bracket group are arranged as B, C positioned on the left side of B and A positioned above B and C;
the phase sequence arrangement of the cables of the first back-line cable group laid on the left bracket of the third layer bracket group and the second back-line cable group laid on the right bracket of the third layer bracket group is c, b and a in sequence from left to right; the first back-line cable group laid on the left bracket of the fourth layer bracket group and the second back-line cable group laid on the right bracket of the fourth layer bracket group are A, B, C sequentially from left to right.
In the above technical solution, the lateral width of the channel is 1000 mm; the spacing between the first layer bracket set and the second layer bracket set and the spacing between the second layer bracket set and the third layer bracket set are 600 mm; the distance between the third layer bracket set and the fourth layer bracket set is 500 mm; the lengths of the left bracket and the right bracket are 850 mm.
In the above technical scheme, the center-to-center distance between adjacent cables of the first back-line cable group and the second back-line cable group is 260 mm.
Compared with the prior art, the utility model has the following advantages:
1) The utility model can safely and reliably arrange the parallel cable in the tunnel, and realizes the safe operation of the two-circuit 500kV parallel cable line and the two-circuit 220kV parallel cable line.
2) The utility model can improve the transmission capacity of the cable line, meet the requirements of installation, rush repair and the like, and promote the application of the parallel cable technology.
3) The 6 identical-loop cables ABC which are arranged in a straight shape and a delta shape are arranged in phase sequence, so that current can be evenly distributed between the two identical-phase cables, the load utilization rate of the parallel cables is close to 100%, and the conveying capacity of the parallel cables is effectively improved; simulation results show that after the phase sequence arrangement of the utility model is adopted, the load utilization rate of the parallel cable can be improved from 70-80% of the common condition to nearly 100%.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
The device comprises a 1-tunnel, a 2-support group, a 21-first-layer support group, a 22-second-layer support group, a 23-third-layer support group, a 24-fourth-layer support group, a 251-left support, a 252-right support, a 26-first-return 500kV cable line, a 261-first-return inverted-V-shaped cable line-, a 27-second-return 500kV cable line, a 271-second-return inverted-V-shaped cable line-, a 28-first-return 220kV cable line, a 281-first-return inverted-V-shaped cable line, a 29-second-return 220kV cable line, a 291-second-return inverted-V-shaped cable line, a 3-channel, a 4-cable line and a 41-cable.
Detailed Description
The following detailed description of the utility model is, therefore, not to be taken in a limiting sense, but is made merely by way of example. While making the advantages of the present utility model clearer and more readily understood by way of illustration.
As can be seen with reference to the accompanying drawings: the utility model provides a lay arrangement structure of parallel cable in tunnel which characterized in that: the device comprises a tunnel 1, four layers of bracket groups 2 symmetrically arranged on the inner wall of the tunnel 1, channels 3 positioned between the four layers of bracket groups 2 and cable lines 4 arranged on each layer of bracket group 2; the four-layer bracket group 2 is respectively a first-layer bracket group 21, a second-layer bracket group 22, a third-layer bracket group 23 and a fourth-layer bracket group 24 from bottom to top; the tunnel 1 is rectangular;
the first layer bracket set 21, the second layer bracket set 22, the third layer bracket set 23 and the fourth layer bracket set 24 all comprise a left bracket 251 and a right bracket 252;
the cabling 4 comprises a first return 500kV cabling 26 laid on the left support 251 of the first layer support group 21 and the left support 251 of the second layer support group 22, a second return 500kV cabling 27 laid on the right support 252 of the first layer support group 21 and the right support 252 of the second layer support group 22, a first return 220kV cabling 28 laid on the left support 251 of the third layer support group 23 and the left support 251 of the fourth layer support group 24, and a second return 220kV cabling 29 laid on the right support 252 of the third layer support group 23 and the right support 252 of the fourth layer support group 24; this arrangement maximizes the use of rectangular tunnel 1 space and provides for practical use.
The first back 500kV cable 26 includes two first back delta-shaped cable groups 261, one first back delta-shaped cable group 261 is laid on the left bracket 251 of the first layer bracket group 21, and the other first back delta-shaped cable group 261 is laid on the left bracket 251 of the second layer bracket group 22;
the second back 500kV cable assembly 27 includes two second back delta-shaped cable assemblies 271, one second back delta-shaped cable assembly 271 is laid on the right support 252 of the first layer support assembly 21, and the other second back delta-shaped cable assembly 262 is laid on the right support 252 of the second layer support assembly 22;
the first back 220kV cable 28 includes two first back-line cable groups 281, one first back-line cable group 281 is laid on the left bracket 251 of the third layer bracket group 23, and the other first back-line cable group 281 is laid on the left bracket 251 of the fourth layer bracket group 24;
the second-loop 220kV cable assembly 29 includes two second-loop in-line cable assemblies 291, one second-loop in-line cable assembly 291 is laid on the right support 252 of the third-layer support assembly 23, and the other second-loop in-line cable assembly 291 is laid on the right support 252 of the fourth-layer support assembly 24.
The first reverse delta-shaped cable set 261 and the second reverse delta-shaped cable set 271 comprise two horizontally arranged cables 41 and one cable 41 positioned above the middle parts of the two horizontally arranged cables 41; the first back in-line cable set 281 and the second back in-line cable set 291 each include three horizontally disposed cables 41.
The phase sequence arrangement of the cables of the first reverse delta-shaped cable group 261 laid on the left bracket 251 of the first layer bracket group 21 and the second reverse delta-shaped cable group 271 laid on the right bracket 252 of the first layer bracket group 21 is a, b positioned on the left side of a and c positioned above a and b; the phase sequence of the cables of the first reverse delta cable group 261 laid on the left bracket 251 of the second-layer bracket group 21 and the second reverse delta cable group 271 laid on the right bracket 252 of the second-layer bracket group 22 is arranged as B, C located on the left side of B, a located above B and C;
the phase sequence arrangement of the cables of the first back-line cable group 281 laid on the left bracket 251 of the third-layer bracket group 23 and the second back-line cable group 291 laid on the right bracket 252 of the third-layer bracket group 23 is c, b and a in sequence from left to right; the phase sequence arrangement of the cables of the first back-line cable group 281 laid on the left bracket 251 of the fourth-layer bracket group 24 and the second back-line cable group 291 laid on the right bracket 252 of the fourth-layer bracket group 24 is A, B, C from left to right in sequence;
the 6 identical-loop cables ABC which are arranged in a straight shape and a delta shape are arranged in phase sequence, so that current can be evenly distributed between the two identical-phase cables 41, the load utilization rate of the parallel cables 41 is close to 100%, and the conveying capacity of the parallel cables 41 is effectively improved; simulation results show that after the phase sequence arrangement in the graph is adopted, the load utilization rate of the parallel cable can be improved from 70-80% of the common condition to nearly 100%.
The transverse width of the channel 3 is 1000 mm, so that the passing requirements of operators in the process of installation, overhaul and the like can be met; the spacing between the first layer bracket set 21 and the second layer bracket set 22 and the spacing between the second layer bracket set 22 and the third layer bracket set 23 are 600 mm; the spacing between the third layer bracket set 23 and the fourth layer bracket set 24 is 500 mm; the left bracket 251 and the right bracket 252 are each 850 mm in length.
The center-to-center spacing between adjacent cables 41 of the first back-to-center cable set 281 and the second back-to-back cable set 291 is 260 mm. The installation and operation staff can conveniently carry out the works such as cable laying installation or disassembly, cable surface operation state observation and the like, and the space requirements required by various operations such as installation, maintenance, overhaul and rush repair are met.
Other non-illustrated parts are known in the art.
Claims (6)
1. The utility model provides a lay arrangement structure of parallel cable in tunnel which characterized in that: the device comprises a tunnel (1), four layers of bracket groups (2) symmetrically arranged on the inner wall of the tunnel (1), channels (3) positioned between the four layers of bracket groups (2) and cable lines (4) arranged on each layer of bracket group (2); the four-layer bracket group (2) comprises a first-layer bracket group (21), a second-layer bracket group (22), a third-layer bracket group (23) and a fourth-layer bracket group (24) from bottom to top;
the first layer bracket set (21), the second layer bracket set (22), the third layer bracket set (23) and the fourth layer bracket set (24) comprise a left bracket (251) and a right bracket (252);
the cable line (4) comprises a first-circuit 500kV cable line (26) laid on a left bracket (251) of the first-layer bracket group (21) and a left bracket (251) of the second-layer bracket group (22), a second-circuit 500kV cable line (27) laid on a right bracket (252) of the first-layer bracket group (21) and a right bracket (252) of the second-layer bracket group (22), a first-circuit 220kV cable line (28) laid on a left bracket (251) of the third-layer bracket group (23) and a left bracket (251) of the fourth-layer bracket group (24), and a second-circuit 220kV cable line (29) laid on a right bracket (252) of the third-layer bracket group (23) and a right bracket (252) of the fourth-layer bracket group (24).
2. A parallel cable laying arrangement in a tunnel according to claim 1, characterized in that: the first back 500kV cable line (26) comprises two groups of first back delta-shaped cable groups (261), one group of first back delta-shaped cable groups (261) are laid on a left bracket (251) of the first layer bracket group (21), and the other group of first back delta-shaped cable groups (261) are laid on a left bracket (251) of the second layer bracket group (22);
the second back 500kV cable line (27) comprises two groups of second back delta-shaped cable groups (271), one group of second back delta-shaped cable groups (271) are laid on a right support (252) of the first layer support group (21), and the other group of second back delta-shaped cable groups (271) are laid on a right support (252) of the second layer support group (22);
the first back 220kV cable line (28) comprises two groups of first back-line cable groups (281), one group of first back-line cable groups (281) is laid on a left bracket (251) of the third-layer bracket group (23), and the other group of first back-line cable groups (281) is laid on a left bracket (251) of the fourth-layer bracket group (24);
the second-loop 220kV cable circuit (29) comprises two groups of second-loop linear cable groups (291), one group of second-loop linear cable groups (291) is laid on a right support (252) of the third-layer support group (23), and the other group of second-loop linear cable groups (291) is laid on a right support (252) of the fourth-layer support group (24).
3. A parallel cable laying arrangement in a tunnel according to claim 2, characterized in that: the first reverse delta-shaped cable set (261) and the second reverse delta-shaped cable set (271) comprise two horizontally arranged cables (41) and one cable (41) positioned above the middle parts of the two horizontally arranged cables (41); the first back-to-line cable group (281) and the second back-to-line cable group (291) comprise three horizontally arranged cables (41).
4. A parallel cable laying arrangement in a tunnel according to claim 3, characterized in that: the phase sequence arrangement of the cables of the first reverse delta-shaped cable group (261) laid on the left bracket (251) of the first layer bracket group (21) and the second reverse delta-shaped cable group (271) laid on the right bracket (252) of the first layer bracket group (21) is a, b positioned on the left side of a and c positioned above a and b; the phase sequence of the cables of the first reverse delta-shaped cable group (261) laid on the left bracket (251) of the second layer bracket group (22) and the second reverse delta-shaped cable group (271) laid on the right bracket (252) of the second layer bracket group (22) is arranged as B, C positioned on the left side of B and A positioned above B and C;
the phase sequence arrangement of the cables of the first back-line cable group (281) laid on the left bracket (251) of the third-layer bracket group (23) and the second back-line cable group (291) laid on the right bracket (252) of the third-layer bracket group (23) is c, b and a in sequence from left to right; the phase sequence arrangement of the cables of the first back-line cable group (281) laid on the left bracket (251) of the fourth-layer bracket group (24) and the second back-line cable group (291) laid on the right bracket (252) of the fourth-layer bracket group (24) is A, B, C sequentially from left to right.
5. A parallel cable laying arrangement in a tunnel according to claim 4, characterized in that: the transverse width of the channel (3) is 1000 mm; the spacing between the first layer bracket set (21) and the second layer bracket set (22) and between the second layer bracket set (22) and the third layer bracket set (23) is 600 mm; the distance between the third layer bracket set (23) and the fourth layer bracket set (24) is 500 mm; the lengths of the left bracket (251) and the right bracket (252) are 850 mm.
6. A parallel cable laying arrangement in a tunnel according to claim 5, characterized in that: the center-to-center distance between adjacent cables (41) of the first back-to-line cable group (281) and the second back-to-back cable group (291) is 260 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223091729.3U CN218919940U (en) | 2022-11-16 | 2022-11-16 | Laying arrangement structure of parallel cable in tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223091729.3U CN218919940U (en) | 2022-11-16 | 2022-11-16 | Laying arrangement structure of parallel cable in tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN218919940U true CN218919940U (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223091729.3U Active CN218919940U (en) | 2022-11-16 | 2022-11-16 | Laying arrangement structure of parallel cable in tunnel |
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| CN (1) | CN218919940U (en) |
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- 2022-11-16 CN CN202223091729.3U patent/CN218919940U/en active Active
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