CN204029423U - A kind of flexible high pressure direct current power cable with cross-linked polyethylene insulation - Google Patents
A kind of flexible high pressure direct current power cable with cross-linked polyethylene insulation Download PDFInfo
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- CN204029423U CN204029423U CN201420067060.0U CN201420067060U CN204029423U CN 204029423 U CN204029423 U CN 204029423U CN 201420067060 U CN201420067060 U CN 201420067060U CN 204029423 U CN204029423 U CN 204029423U
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- layer
- direct current
- current power
- high pressure
- power cable
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The utility model discloses a kind of flexible high pressure direct current power cable with cross-linked polyethylene insulation, comprise the copper conductor being positioned at cable center, at copper conductor outer coated inner semiconductor layer, crosslinked polyetylene insulated layer, out semiconductor layer, metal screen layer, longitudinal water-blocking layer, radial resistivity water layer and pe sheath layer successively.The utility model is a kind of squash type, unipolar cables, have that volume is little, intensity is high, lightweight, transmission capacity is large, insulation level is superior and lay the advantage such as easily, solve internal field's distortion that traditional cable causes because insulator Space-charge accumulates and the ageing of insulation that causes even punctures, and the uneven problem causing insulator exterior overstress of pressure distribution that responsive to temperature causes.
Description
Technical field
The utility model belongs to power cable field, is specifically related to a kind of flexible high pressure direct current power cable with cross-linked polyethylene insulation.
Background technology
At present, the high voltage direct current cable put into operation is based on paper oil insulation and oil-filled cable.Along with the development of insulating material of polymer, plastic polymer insulated cable (mainly crosslinked polyethylene XLPE) obtains and applies widely in interchange transmission and distribution networks, this gives the credit to, and its dielectric strength is high, and thermomechanical property is superior, the advantage of environmental friendliness and the aspect such as easy to maintenance.But, plastic insulated cable but fails to be promoted the use of in high direct voltage, this is because direct current plastic insulated cable is in running, sometimes in order to change energy direction of transfer, need the polarity changing cable, and cable is in loaded situation, changes cable polarity and cable internal electric intensity may be made to increase by 50 ~ 70%.The test of international conference on large HV electric systems suggestion dipole inversion is carried out under 1.5 times of operating voltages, and this suitable cable directly adds 2.5 times of operating voltages lentamente.Under high direct voltage, very easily accumulation space electric charge in cable insulation, and then cause insulating barrier internal field to distort, reaches 7 ~ 8 times of normal work field intensity, and what probably cause insulating punctures.
Summary of the invention
The purpose of this utility model is to provide one and has that volume is little, intensity is high, lightweight, transmission capacity is large, insulation level is superior and lay easy flexible high pressure direct current power cable with cross-linked polyethylene insulation, solve internal field's distortion that traditional cable causes because insulator Space-charge accumulates and the ageing of insulation that causes even punctures, and the uneven problem causing insulator exterior overstress of pressure distribution that responsive to temperature causes.
A kind of flexible high pressure direct current power cable with cross-linked polyethylene insulation described in the utility model, comprise the copper conductor being positioned at cable center, be provided with inner semiconductor layer, crosslinked polyetylene insulated layer, out semiconductor layer, metal screen layer, longitudinal water-blocking layer, radial resistivity water layer and pe sheath layer outward successively at copper conductor.
Further improvement, described inner semiconductor layer and out semiconductor layer thickness are 1.2mm.
Further improvement, described metal screen layer adopts oxygen-free copper stripe lapping structure, and the thickness of the oxygen-free copper stripe of employing is 2.5mm, and its wrapped on average rate of putting up is not less than 30%.
Further improvement, described longitudinal water-blocking layer adopts single-sided insulation waterstop, and its thickness in monolayer is 0.2mm, and its structure adopts overlapping wrapped mode, and Duplication is not less than 20%.
Improve further, described radial resistivity water layer adopts aluminium-plastic tape, and its thickness in monolayer is 0.3mm again, and its structure adopts longitudinal overlap to pack mode, and overlapping widths is not less than 10mm.
The beneficial effects of the utility model are:
Inner semiconductor layer of the present utility model and outer conductive shield layer thickness are the design of 1.2mm, the best accumulation effectively reducing the space charge under DC electric field effect in insulating barrier.For avoiding easy accumulation space electric charge in crosslinked polyetylene insulated layer, space charge causes electric field distortion, and causes the situation that possible insulation breakdown occurs.The stop water that the utility model adopts longitudinal water-blocking and radial water-resisting to combine, efficiently avoid moisture and enters impact on insulating performance of cable.The utility model adopts the copper strips of high conduction performance as metal shield materials, and replace conventional corrugated aluminum sheath structure, while not affecting short-circuit current capability, effectively reduce cable own wt, volume and external diameter, constructability lays.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, a kind of flexible high pressure direct current power cable with cross-linked polyethylene insulation described in the utility model, comprise the copper conductor 1 being positioned at cable center, at copper conductor 1 outer coated inner semiconductor layer 2, crosslinked polyetylene insulated layer 3, out semiconductor layer 4 successively, metal screen layer 5, longitudinal water-blocking layer 6, radial resistivity water layer 7 and pe sheath layer 8.
Inner semiconductor layer 2 described in appeal and out semiconductor layer 4 thickness are 1.2mm; Metal screen layer 5 adopts oxygen-free copper stripe lapping structure, and the thickness of the oxygen-free copper stripe of employing is 2.5mm, and its wrapped on average rate of putting up is not less than 30%.
Longitudinal water-blocking layer 6 adopts single-sided insulation waterstop, and its thickness in monolayer is 0.2mm; Its version adopts overlapping wrapped form, and Duplication is not less than 20%; Radial resistivity water layer 7 adopts aluminium-plastic tape, and its thickness in monolayer is 0.3mm; Its version adopts longitudinal overlap to pack, and overlapping widths is not less than 10mm.
The thickness of insulating barrier of the present utility model adopts following steps to determine: the selected distribution of space charge of insulating material under different average electric field of (1) test; (2) according to the distribution of space charge recorded, the Electric Field Distribution in insulating barrier is calculated; (3) according to Electric Field Distribution, judge that under which average electric field, both met average electric field is no more than 15kV/mm, maximum field intensity level is no more than 20kV/mm; (4) select the insulating material that satisfied (3) require, and calculate its average field intensity Eav, namely the electric pressure of designed cable obtains the thickness of insulating barrier divided by this Eav.
The utility model provides a kind of flexible high pressure direct current power cable with cross-linked polyethylene insulation; the above is only preferred implementation method of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle; can also make some improvement, these improvement also should be considered as protection range of the present utility model.
Claims (4)
1. a flexible high pressure direct current power cable with cross-linked polyethylene insulation, comprise the copper conductor (1) being positioned at cable center, at copper conductor (1) coated inner semiconductor layer (2), crosslinked polyetylene insulated layer (3), out semiconductor layer (4), metal screen layer (5), longitudinal water-blocking layer (6), radial resistivity water layer (7) and pe sheath layer (8) successively outward; It is characterized in that: described inner semiconductor layer (2) and out semiconductor layer (4) thickness are 1.2mm.
2. flexible high pressure direct current power cable with cross-linked polyethylene insulation according to claim 1, it is characterized in that: described metal screen layer (5) adopts oxygen-free copper stripe lapping structure, the thickness of the oxygen-free copper stripe adopted is 2.5mm, and its wrapped on average rate of putting up is not less than 30%.
3. flexible high pressure direct current power cable with cross-linked polyethylene insulation according to claim 1, it is characterized in that: described longitudinal water-blocking layer (6) adopts single-sided insulation waterstop, its thickness in monolayer is 0.2mm, and its structure adopts overlapping wrapped mode, and Duplication is not less than 20%.
4. flexible high pressure direct current power cable with cross-linked polyethylene insulation according to claim 1, it is characterized in that: described radial resistivity water layer (7) adopts aluminium-plastic tape, its thickness in monolayer is 0.3mm, and its structure adopts longitudinal overlap to pack mode, and overlapping widths is not less than 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420067060.0U CN204029423U (en) | 2014-02-17 | 2014-02-17 | A kind of flexible high pressure direct current power cable with cross-linked polyethylene insulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420067060.0U CN204029423U (en) | 2014-02-17 | 2014-02-17 | A kind of flexible high pressure direct current power cable with cross-linked polyethylene insulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204029423U true CN204029423U (en) | 2014-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420067060.0U Expired - Fee Related CN204029423U (en) | 2014-02-17 | 2014-02-17 | A kind of flexible high pressure direct current power cable with cross-linked polyethylene insulation |
Country Status (1)
| Country | Link |
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| CN (1) | CN204029423U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794276A (en) * | 2014-02-17 | 2014-05-14 | 无锡市长城电线电缆有限公司 | Flexible high-voltage direct-current cross-linked polyethylene insulation power cable |
-
2014
- 2014-02-17 CN CN201420067060.0U patent/CN204029423U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794276A (en) * | 2014-02-17 | 2014-05-14 | 无锡市长城电线电缆有限公司 | Flexible high-voltage direct-current cross-linked polyethylene insulation power cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20180217 |