CN113921187A - Direct current transmission cable pipeline tied in a bundle - Google Patents
Direct current transmission cable pipeline tied in a bundle Download PDFInfo
- Publication number
- CN113921187A CN113921187A CN202111053994.XA CN202111053994A CN113921187A CN 113921187 A CN113921187 A CN 113921187A CN 202111053994 A CN202111053994 A CN 202111053994A CN 113921187 A CN113921187 A CN 113921187A
- Authority
- CN
- China
- Prior art keywords
- transmission cable
- current transmission
- layer
- protective sleeve
- direct current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 67
- 230000001681 protective effect Effects 0.000 claims abstract description 14
- 239000004020 conductor Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 5
- 230000005684 electric field Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/008—Power cables for overhead application
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
Landscapes
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention discloses a direct current transmission cable bundling pipeline, and belongs to the field of large-scale long-distance ultra-high and extra-high voltage transmission. The method comprises the following steps: the cable comprises an outer-layer protective sleeve (1) and 2n direct-current transmission cables (2) arranged in the outer-layer protective sleeve, wherein all the direct-current transmission cables (2) are symmetrically distributed on the geometric center line of the outer-layer protective sleeve, and n is more than or equal to 1 and less than or equal to 4. According to the invention, an even number of direct current transmission cables are bundled, all the direct current transmission cables are symmetrically distributed on the geometric center line of the outer-layer protective sleeve, the structure is compact and reasonable, the distribution of an electric field and a magnetic field can be optimized, and the electromagnetic leakage is obviously reduced.
Description
Technical Field
The invention belongs to the field of large-scale long-distance ultra-high and extra-high voltage power transmission, and particularly relates to a direct current transmission cable bundling pipeline.
Background
The direct current transmission line usually adopts a direct current overhead line, and a cable line is considered to be adopted only in the situation that the overhead line is limited. Under the scene of 'west-east power transmission', a power transmission corridor is limited, air in a high-altitude area is relatively thin, the required insulation distance is large, the external insulation design and construction difficulty of an overhead line mode is very high, and therefore a cable mode is adopted to replace an overhead line in consideration of a special geological region or a local high mountain canyon blocking point.
The dc cable is typically a single core cable. The application scenes of the existing ultra-high voltage direct current transmission cable are mostly island power supply and cross-sea transmission projects. Cables are generally freely laid in submarine tunnels.
However, when the method is used in a 'west-east-delivery' scene, the following defects exist: (1) in the western part of China, a high mountain gorge area represented by a transected mountain is high in mountain height and valley depth and severe in geographic conditions, and is a geological disaster high-occurrence area, and the conventional transmission cable pipeline is subjected to severe and frequent geological disaster invasion such as earthquake and the like; (2) the electric and magnetic field distributions cause large electromagnetic leakage.
Disclosure of Invention
Aiming at the defects and the improvement requirements of the prior art, the invention provides a direct current transmission cable bundling pipeline, aiming at forming a plurality of cables and a pipeline into a bundle by adopting a transmission cable bundling pipelining technology so as to strengthen the shock resistance; meanwhile, the design can optimize the distribution of the electric field and the magnetic field so as to reduce electromagnetic leakage.
To achieve the above object, according to one aspect of the present invention, there is provided a dc power transmission cable bundling conduit, comprising:
the cable comprises an outer-layer protective sleeve (1) and 2n direct-current transmission cables (2) arranged in the outer-layer protective sleeve, wherein all the direct-current transmission cables (2) are symmetrically distributed on the geometric center line of the outer-layer protective sleeve, and n is more than or equal to 1 and less than or equal to 4.
Preferably, the direct-current transmission cable is an ultra-high voltage direct-current transmission cable or an extra-high voltage direct-current transmission cable.
Preferably, the direct current transmission cable comprises, from inside to outside, concentric and coaxial: the cable comprises a conductor (3), a conductor shielding layer (4), an insulating layer (5), an insulating shielding layer (6), an armor layer (7) and a covering layer (8).
Preferably, an inner layer protective sleeve (9) is arranged on the outer side of the power transmission cable.
Preferably, the inner sheath tube is an insulating shielding material.
Preferably, the inner sheath tube is tangent to the outer sheath tube.
Preferably, the power transmission cable bundling conduit is used for power transmission tunnel construction, highway collineation or railway tunnel collineation.
Has the advantages that: compared with a direct current overhead line, the power transmission cable bundling pipeline is adopted to build a power transmission tunnel, so that the space of a power transmission corridor can be saved, and the power transmission cable bundling pipeline can be collinear with the conventional road and railway tunnels, so that the construction cost is reduced, and the operation and maintenance efficiency is improved.
Generally, by the above technical solution conceived by the present invention, the following beneficial effects can be obtained:
according to the invention, an even number of direct current transmission cables are bundled, all the direct current transmission cables are symmetrically distributed on the geometric center line of the outer-layer protective sleeve, the structure is compact and reasonable, the distribution of an electric field and a magnetic field can be optimized, and the electromagnetic leakage is obviously reduced.
Drawings
FIG. 1 is a schematic structural diagram of a bundled tube pipelining inner-layer-free protective sleeve for ultra-high voltage and extra-high voltage DC transmission cables provided by the invention;
FIG. 2 is a schematic structural diagram of a cluster pipelining inner-layer sheath pipe for an ultra-high voltage direct current transmission cable provided by the invention;
the same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1 is outer sheath pipe, 2 is the direct current transmission cable, 3 is the conductor, 4 is the conductor shielding layer, 5 is the insulating layer, 6 is the insulation shielding layer, 7 is the armor, 8 is the tegument, 9 is the inlayer sheath pipe.
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.
The invention provides a transmission cable bundling pipeline scheme, and aims to solve the problem that western clean electric energy is delivered in a large scale and a long distance but a transmission corridor is in short supply.
As shown in fig. 1, the power transmission cable bundling conduit of the present invention comprises an outer sheath tube 1, and a dc power transmission cable 2 disposed in the outer sheath tube. The space between the outer sheath pipe 1 and the direct current transmission cable 2 can be filled by a filling pad.
In a preferred embodiment of the invention, the number of dc transmission cables 2 is 4, constituting a double circuit (one circuit having two dc cables). The direct-current transmission cable 2 is an ultra-high voltage and extra-high voltage direct-current transmission cable, and the direct-current transmission cable 2 is closely and symmetrically distributed in the outer sheath tube 1. The direct current transmission cable 2 includes a conductor 3, a conductor shield 4, an insulating layer 5, an insulating shield 6, an armor layer 7, and a jacket layer 8.
The invention provides a power transmission cable bundling pipeline with two structures, one is not provided with an inner layer protective sleeve, as shown in figure 1. One is provided with an inner sheath 9, as shown in fig. 2, which is made of polyvinyl chloride. The space between the inner sheath pipe 9 and the DC transmission cable 2 can be filled by a filling pad. In the structure with the inner-layer protecting sleeve, the inner-layer protecting sleeve and the outer-layer protecting sleeve are closely adjacent to each other so as to save space.
As can be seen from the above embodiments, the present invention is characterized in that: based on the current direct current cable bundling, the structure is compact, and the problem of shortage of western clean power energy sources in large-scale outward transmission power transmission corridors is expected to be solved. And has the advantages of optimizing the distribution of the electric field and the magnetic field and obviously reducing the electromagnetic leakage.
In addition, the invention can be independently constructed into a power transmission tunnel and can also be collinear with the conventional road and railway tunnels, thereby reducing the construction cost and improving the operation and maintenance efficiency.
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 (7)
1. A direct current transmission cable bundling conduit, comprising:
the cable comprises an outer-layer protective sleeve (1) and 2n direct-current transmission cables (2) arranged in the outer-layer protective sleeve, wherein all the direct-current transmission cables (2) are symmetrically distributed on the geometric center line of the outer-layer protective sleeve, and n is more than or equal to 1 and less than or equal to 4.
2. The dc transmission cable bundling duct of claim 1, wherein said dc transmission cable is an extra-high voltage dc transmission cable.
3. The dc transmission cable bundling duct of claim 2, wherein said dc transmission cables comprise, from inside to outside, concentric and coaxial: the cable comprises a conductor (3), a conductor shielding layer (4), an insulating layer (5), an insulating shielding layer (6), an armor layer (7) and a covering layer (8).
4. The power transmission cable bundling duct of claim 2, wherein an inner jacket tube (9) is arranged outside said power transmission cables.
5. The power transmission cable bundling conduit according to claim 4, wherein the inner jacket tube is an insulating shielding material.
6. The power transmission cable bundling conduit of claim 4, wherein the inner jacket tube is tangential to the outer jacket tube.
7. An electric transmission cable bundling duct according to any of the claims 1-6, wherein the electric transmission cable bundling duct is used for electric transmission tunnel construction, co-linear highway or co-linear railway tunnels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111053994.XA CN113921187A (en) | 2021-09-09 | 2021-09-09 | Direct current transmission cable pipeline tied in a bundle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111053994.XA CN113921187A (en) | 2021-09-09 | 2021-09-09 | Direct current transmission cable pipeline tied in a bundle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113921187A true CN113921187A (en) | 2022-01-11 |
Family
ID=79234495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111053994.XA Pending CN113921187A (en) | 2021-09-09 | 2021-09-09 | Direct current transmission cable pipeline tied in a bundle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113921187A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015005857A1 (en) * | 2013-07-09 | 2015-01-15 | Habia Cable Ab | Medium/high-voltage cable comprising fluoropolymer layers |
| CN111210942A (en) * | 2019-09-03 | 2020-05-29 | 浙江万马股份有限公司 | Flexible direct current cable with cooling function |
-
2021
- 2021-09-09 CN CN202111053994.XA patent/CN113921187A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015005857A1 (en) * | 2013-07-09 | 2015-01-15 | Habia Cable Ab | Medium/high-voltage cable comprising fluoropolymer layers |
| CN111210942A (en) * | 2019-09-03 | 2020-05-29 | 浙江万马股份有限公司 | Flexible direct current cable with cooling function |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220111 |
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| RJ01 | Rejection of invention patent application after publication |