CN104409165A - Novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV - Google Patents
Novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV Download PDFInfo
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- CN104409165A CN104409165A CN201410697083.4A CN201410697083A CN104409165A CN 104409165 A CN104409165 A CN 104409165A CN 201410697083 A CN201410697083 A CN 201410697083A CN 104409165 A CN104409165 A CN 104409165A
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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 invention discloses a novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV, belongs to the technical field of power cables, and aims to solve the problem that existing high-voltage-class insulated power cables do not adapt to high-voltage power transmission with nominal voltage of 750kV. The novel cross-linked-polyethylene insulated power cable is produced by a method including connectively wrapping a semiconductive nylon tape around a conduct cable core, covering the semiconductive nylon tape with an inner super-smooth semiconductive shielding layer, covering the inner super-smooth semiconductive shielding layer with a super-purified cross-linked-polyethylene insulating layer and an outer super-smooth semiconductive shielding layer, connectively wrapping a semiconductive water-blocking tape around the outer super-smooth semiconductive shielding layer, covering the semiconductive water-blocking tape with a copper-wire fiber blended cloth layer, connectively wrapping a wrinkled metal sheath around the copper-wire fiber blended cloth layer, sequentially covering the wrinkled metal sheath with a cable asphalt layer and an insulated polyvinyl chloride outer sheath, and coating the outer surface of the insulated polyvinyl chloride outer sheath with a graphitic layer. The novel cross-linked-polyethylene insulated power cable is reasonable in structural design and suitable for serving as power cables with the nominal voltage ranging from 500kV to 750kV and the like.
Description
Technical field
The invention belongs in a kind of electric power system basic routing line of power cable technical field in order to transmission and the insulated power cable of voltage levels distributing high-power power.
Background technology
Along with the growing of power industry and the continuous progress of industrial and agricultural production technology, voltage levels, transmission and the heavy in section of distribution high-power power, the demand of jumbo power transmission cable progressively increase, therefore also more and more higher to the technical requirement of power cable.In known technology, the conductor be twisted into by copper cash or aluminum steel that the insulated power cable of existing voltage levels mainly adopts is externally to outer coating conductor screen, crosslinked polyetylene insulated layer, buffer water-blocking band, corrugated metallic sheath, cable asphalt layer, oversheath successively.But limit by its structure, for more than rated voltage 500kV as the transmission of the high-power power of rated voltage 750kV voltage levels with when distributing, its proof voltage, insulation property, water permeability and high-drop installation are just restricted, and are not suitable with the electric power transfer operation of rated voltage 750kV voltage levels.
Summary of the invention
In order to overcome deficiency of the prior art, the insulated power cable solving existing voltage levels is not suitable with the problem of rated voltage 750kV voltage levels electric power transfer operation.The object of the present invention is to provide a kind of reasonable in design, and its proof voltage, insulation property, water permeability and high-drop installation etc. adapt to the novel power cable of the electric power transfer operation of more than rated voltage 500kV to rated voltage 750kV voltage levels.
The present invention's adopted technical scheme that solves the problem is:
A novel power cable with cross-linked polyethylene insulation of rated voltage 750kV, it is provided with: conductor thread core, semiconductive nylon tape, ultra-smooth semiconductive shielding layer, the crosslinked polyetylene insulated layer of ultrapurification, semi-conductive buffer water-blocking band, cable asphalt layer, insulated type polyvinyl chloride oversheath, graphite linings, copper wire fiber shuffling layer of cloth, corrugated metallic sheath, conductor thread core outside bag connects semiconductive nylon tape, the coated semiconductive nylon tape in inside of internal layer ultra-smooth semiconductive shielding layer, the crosslinked polyetylene insulated layer of external sheath ultrapurification, the outside coated outer ultra-smooth semiconductive shielding layer of the crosslinked polyetylene insulated layer of ultrapurification, the outside bag of outer ultra-smooth semiconductive shielding layer connects semi-conductive buffer water-blocking band, the outside ladle cover of semi-conductive buffer water-blocking band has copper wire fiber shuffling layer of cloth, copper wire fiber shuffling layer of cloth outside bag connects corrugated metallic sheath, and corrugated metallic sheath outside is coated with cable asphalt layer successively, insulated type polyvinyl chloride oversheath, the outer surface of insulated type polyvinyl chloride oversheath has graphite linings.
The novel power cable with cross-linked polyethylene insulation of above-mentioned rated voltage 750kV, described conductor thread core is that cylindrical conductors stock block periphery bag connects tile-type conductor stock block, and embeddingly between milliken conductor stock block is connected with wrinkle ply of paper.
The novel power cable with cross-linked polyethylene insulation of above-mentioned rated voltage 750kV, described corrugated metallic sheath be corrugated aluminum sheath, wrinkle copper sheath, wrinkle stainless steel sheath any one.
The novel power cable with cross-linked polyethylene insulation of above-mentioned rated voltage 750kV, the crosslinked polyetylene insulated layer of described ultrapurification is made up of ultrapurification cross-linking polyethylene materials, and ultra-smooth semiconductive shielding layer is made up of ultra-smooth semi-conductive shielding material.
The novel power cable with cross-linked polyethylene insulation of above-mentioned rated voltage 750kV, the nominal thickness of described insulated type polyvinyl chloride oversheath is 6.0mm; Ultra-smooth semiconductive shielding layer and the crosslinked polyetylene insulated bed boundary of ultrapurification are greater than the micropore of 0.02mm without aperture; Ultra-smooth semiconductive shielding layer and the crosslinked polyetylene insulated bed boundary of ultrapurification are without the projection being greater than 0.05mm.
The manufacture craft of the novel power cable with cross-linked polyethylene insulation of rated voltage 750kV of the present invention, equipment adopts dry type chemical crosslinking, vertical-type high-pressure cross-linking production line, and operation is: 1. raw material apolegamy, 2. wire drawing, 3. twisted wire, 4. milliken conductor stranding, 5. inner shield, insulation, external shield insulation, 6. degas, 7. wrapped, the 8. vertical bag welding of aluminium, 9. coated bitumen layer+coated oversheath+coating graphite linings, 10. product inspection, packaging, be product of the present invention.
The novel power cable with cross-linked polyethylene insulation product of the rated voltage 750kV made by the present invention, the detection voltage of actual tests, as following table:
Oversheath voltage test, between corrugated metallic sheath metallic sheath and insulated type polyvinyl chloride surface of outer sheath conductive layer, connect negative pole with corrugated metallic sheath apply direct voltage 25kV, last 1min, insulated type polyvinyl chloride oversheath does not puncture.
When product of the present invention uses, according to designing requirement, this novel power cable with cross-linked polyethylene insulation is carried out laying task.
Because the present invention's design have employed technique scheme, the insulated power cable efficiently solving existing voltage levels is not suitable with the problem of rated voltage 750kV voltage levels electric power transfer operation.Also and inspection on probation through actual tests shows, it has reasonable in design, high voltage withstanding, excellent insulating property, water permeability are good and be suitable for the advantages such as high-drop installation, applicablely makes more than rated voltage 500kV to rated voltage 750kV (U
m=800kV) power cable, be also suitable for use as and pass through rivers, lake is laid in power cable etc. in wet environment.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Fig. 1 is the structure diagram of the embodiment of the present invention.
To be that in Fig. 1, conductor thread core 1 is embedding connect wrinkle ply of paper 12 and connect the structure for amplifying sketch of semiconductive nylon tape 2 Fig. 2.
In accompanying drawing, each label is: 1 conductor thread core; 1-1 round conductor stock block; 1-2 tile-type conductor stock block; 2 semiconductive nylon tapes; 3 internal layer ultra-smooth semiconductive shielding layers; The crosslinked polyetylene insulated layer of 4 ultrapurification; 5 outer ultra-smooth semiconductive shielding layers; 6 semi-conductive buffer water-blocking bands; 7 copper wire fiber shuffling layer of cloths; 8 wrinkle copper sheaths; 9 cable asphalt layers; 10 insulated type polyvinyl chloride oversheaths; 11 graphite linings; 12 wrinkle ply of papers.
Embodiment
As embodiment illustrated in fig. 2 in accompanying drawing 1-, the present invention is provided with: conductor thread core 1, semiconductive nylon tape 2, internal layer ultra-smooth semiconductive shielding layer 3, outer ultra-smooth semiconductive shielding layer 5, the crosslinked polyetylene insulated layer 4 of ultrapurification, semi-conductive buffer water-blocking band 6, cable asphalt layer 9, insulated type polyvinyl chloride oversheath 10, graphite linings 11, copper wire fiber shuffling layer of cloth 7, wrinkle copper sheath 8, conductor thread core 1 outside bag connects semiconductive nylon tape 2, the coated semiconductive nylon tape 2 in inside of internal layer ultra-smooth semiconductive shielding layer 3, the crosslinked polyetylene insulated layer 4 of external sheath ultrapurification, the outside coated outer ultra-smooth semiconductive shielding layer 5 of ultrapurification crosslinked polyetylene insulated layer 4, the outside bag of outer ultra-smooth semiconductive shielding layer 5 connects semi-conductive buffer water-blocking band 6, the outside ladle cover of semi-conductive buffer water-blocking band 6 has copper wire fiber shuffling layer of cloth 7, copper wire fiber shuffling layer of cloth 7 outside bag connects wrinkle copper sheath 8, and wrinkle copper sheath 8 outside is coated with cable asphalt layer 9 successively, insulated type polyvinyl chloride oversheath 10, the outer surface of insulated type polyvinyl chloride oversheath 10 has graphite linings 11, the crosslinked polyetylene insulated layer of described ultrapurification is made up of ultrapurification crosslinked polyethylene (XLPE) material, and ultra-smooth semiconductive shielding layer is made up of ultra-smooth semi-conductive shielding material, the nominal thickness of described insulated type polyvinyl chloride oversheath is 6.0mm, ultra-smooth semiconductive shielding layer and the crosslinked polyetylene insulated bed boundary of ultrapurification are greater than the micropore of 0.02mm without aperture, ultra-smooth semiconductive shielding layer and the crosslinked polyetylene insulated bed boundary of ultrapurification are without the projection being greater than 0.05mm.
See accompanying drawing 2 embodiment, described conductor thread core 1 is connected with 5 tile-type conductor stock block 1-2 for round conductor stock block 1-1 periphery bag, and embeddingly between milliken conductor stock block is connected with wrinkle ply of paper 12.
One embodiment of the novel power cable with cross-linked polyethylene insulation manufacture craft of rated voltage 750kV of the present invention, the dry type chemical crosslinking that equipment adopts, vertical-type high-pressure cross-linking production line, concrete operation is:
1., raw material apolegamy: conductor screen and insulation shielding adopt ultra-smooth semiconductive shieldin material, effectively to guarantee there is good contact interface between conductor screen, insulation, insulation shielding, prevent interface projection from causing electric field to concentrate; Insulating material adopts super-clean cross-linkable polyethylene Insulation Material, requires that the impurity content of in every 1kg Insulation Material more than 70 μm is 0, tensile strength>=17.0MPa, elongation at break>=420%, specific insulation>=1.0 × 10 when 20 DEG C
17Ω cm, dielectric strength>=40kV;
2., wire-drawing process: after carrying out wire drawing with wire drawing machine, through after the assay was approved, wire drawing is sent into wire stranding 3.;
3., wire stranding: after adopting five sections of frame stranding machines to carry out twisted wire, through after the assay was approved, twisted wire is sent into milliken conductor cabling procedure 4.;
4., milliken conductor cabling procedure: be divided into by twisted wire the round conductor of tile-type conductor UNICOM to make cable conductor heart yearn, through after the assay was approved, cable conductor heart yearn sent into inner shield, insulation, external shield insulation operation 5.;
5., inner shield, insulation, external shield insulation operation: by cable conductor heart yearn by after the coated inner shield of VCV high-voltage cross-linking polythene insulated wire cores unit, insulating barrier, outer shielding layer, through after the assay was approved, be transported to operation of degassing;
6., operation of degassing: the case that enters to degas by the cable after coated external shield insulating barrier degass, and through after the assay was approved, delivers to wrapped operation 7.;
7., wrapped operation: by waterstop winding machine carry out wrapped after, through after the assay was approved, deliver to aluminium and indulge bag welding sequence 8.;
8., aluminium indulges bag welding sequence: after adopting argon arc welding unit to carry out the vertical bag welding of aluminium, through after the assay was approved, be transported to coated bitumen layer+coated oversheath+coating graphite linings operation 9.;
9., coated bitumen layer+coated oversheath+coating graphite linings operation: after adopting Ф 200 type to extrude the coated bitumen layer of unit advanced person row, then after coated oversheath+coating graphite linings, enter product inspection, packaging process 10.;
10., product inspection, packaging process: by the cable product that makes according to design standard index request, carry out completely examining, after pass the test, carry out product external packaging by cable packaging machinery.
Claims (4)
1. the novel power cable with cross-linked polyethylene insulation of a rated voltage 750kV, it is provided with conductor thread core, ultra-smooth semiconductive shielding layer, the crosslinked polyetylene insulated layer of ultrapurification, semi-conductive buffer water-blocking band, corrugated metallic sheath, cable asphalt layer, insulated type polyvinyl chloride oversheath, graphite linings, it is characterized in that, also be provided with copper wire fiber shuffling layer of cloth, semiconductive nylon tape, ultra-smooth semiconductive shielding layer comprises internal layer ultra-smooth semiconductive shielding layer and outer ultra-smooth semiconductive shielding layer, conductor thread core outside bag connects semiconductive nylon tape, the coated semiconductive nylon tape in inside of internal layer ultra-smooth semiconductive shielding layer, the crosslinked polyetylene insulated layer of external sheath ultrapurification, the outside coated outer ultra-smooth semiconductive shielding layer of the crosslinked polyetylene insulated layer of ultrapurification, the outside bag of outer ultra-smooth semiconductive shielding layer connects semi-conductive buffer water-blocking band, the outside ladle cover of semi-conductive buffer water-blocking band has copper wire fiber shuffling layer of cloth, copper wire fiber shuffling layer of cloth outside bag connects corrugated metallic sheath, corrugated metallic sheath outside is coated with cable asphalt layer successively, insulated type polyvinyl chloride oversheath, the outer surface of insulated type polyvinyl chloride oversheath has graphite linings.
2. the novel power cable with cross-linked polyethylene insulation of rated voltage 750kV according to claim 1, is characterized in that, conductor thread core is that round conductor stock block periphery bag connects tile-type conductor stock block, and embeddingly between milliken conductor stock block is connected with wrinkle ply of paper.
3. the novel power cable with cross-linked polyethylene insulation of rated voltage 750kV according to claim 1, is characterized in that, corrugated metallic sheath be corrugated aluminum sheath, wrinkle copper sheath, wrinkle stainless steel sheath any one.
4. the novel power cable with cross-linked polyethylene insulation of rated voltage 750kV according to claim 1, is characterized in that, the nominal thickness of insulated type polyvinyl chloride oversheath is 6.0mm; Ultra-smooth semiconductive shielding layer and the crosslinked polyetylene insulated bed boundary of ultrapurification are greater than the micropore of 0.02mm without aperture; Ultra-smooth semiconductive shielding layer and the crosslinked polyetylene insulated bed boundary of ultrapurification are without the projection being greater than 0.05mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410697083.4A CN104409165B (en) | 2014-11-27 | 2014-11-27 | Novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410697083.4A CN104409165B (en) | 2014-11-27 | 2014-11-27 | Novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV |
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| Publication Number | Publication Date |
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| CN104409165A true CN104409165A (en) | 2015-03-11 |
| CN104409165B CN104409165B (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410697083.4A Expired - Fee Related CN104409165B (en) | 2014-11-27 | 2014-11-27 | Novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161207A (en) * | 2015-07-08 | 2015-12-16 | 中天科技海缆有限公司 | Composite combined armored composite rosslinked polyethylene insulation steel band and steel wire fiber submarine cable |
| CN106847400A (en) * | 2017-02-16 | 2017-06-13 | 沈兴线缆集团有限公司 | Copper sheath fire prevention cable |
| CN114334293A (en) * | 2021-12-20 | 2022-04-12 | 杭州电缆股份有限公司 | High-voltage crosslinked polyethylene insulated power cable and preparation process thereof |
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| CN102280194A (en) * | 2011-05-18 | 2011-12-14 | 无锡市曙光电缆有限公司 | Cross-linked polyethylene isolated power cable of split conductor structure |
| CN102347104A (en) * | 2011-06-24 | 2012-02-08 | 四川明星电缆股份有限公司 | 7 split conductor with cable copper core section of 3500mm<2> and manufacturing method thereof |
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| CN103198894A (en) * | 2012-01-04 | 2013-07-10 | 扬州曙光电缆有限公司 | 750KV ultrahigh pressure cross-linked polyethylene insulated power cable |
| CN203444851U (en) * | 2013-07-22 | 2014-02-19 | 重庆三峡电缆(集团)有限公司 | Cross-linked polyethylene insulated power cable with rated voltage 66 to 500 kV |
| CN103824632A (en) * | 2014-02-14 | 2014-05-28 | 申环电缆科技有限公司 | Intelligent extra-high-voltage photoelectric composite cable with built-in optical fiber |
| CN204257268U (en) * | 2014-11-27 | 2015-04-08 | 河北新宝丰电线电缆有限公司 | The novel power cable with cross-linked polyethylene insulation of rated voltage 750kV |
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- 2014-11-27 CN CN201410697083.4A patent/CN104409165B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102280194A (en) * | 2011-05-18 | 2011-12-14 | 无锡市曙光电缆有限公司 | Cross-linked polyethylene isolated power cable of split conductor structure |
| CN102347104A (en) * | 2011-06-24 | 2012-02-08 | 四川明星电缆股份有限公司 | 7 split conductor with cable copper core section of 3500mm<2> and manufacturing method thereof |
| CN103198894A (en) * | 2012-01-04 | 2013-07-10 | 扬州曙光电缆有限公司 | 750KV ultrahigh pressure cross-linked polyethylene insulated power cable |
| CN202711741U (en) * | 2012-07-31 | 2013-01-30 | 上海上力电线电缆有限公司 | Salt lake cable |
| CN202948774U (en) * | 2012-12-19 | 2013-05-22 | 江苏亨通高压电缆有限公司 | Highly-waterproof, corrosion-resistant, high-protection and high-tension cable |
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| CN204257268U (en) * | 2014-11-27 | 2015-04-08 | 河北新宝丰电线电缆有限公司 | The novel power cable with cross-linked polyethylene insulation of rated voltage 750kV |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161207A (en) * | 2015-07-08 | 2015-12-16 | 中天科技海缆有限公司 | Composite combined armored composite rosslinked polyethylene insulation steel band and steel wire fiber submarine cable |
| CN106847400A (en) * | 2017-02-16 | 2017-06-13 | 沈兴线缆集团有限公司 | Copper sheath fire prevention cable |
| CN114334293A (en) * | 2021-12-20 | 2022-04-12 | 杭州电缆股份有限公司 | High-voltage crosslinked polyethylene insulated power cable and preparation process thereof |
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| Publication number | Publication date |
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| CN104409165B (en) | 2017-01-11 |
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Granted publication date: 20170111 Termination date: 20211127 |