CN203260363U - High-voltage and extra-high voltage flexible direct-current power transmission fiber composite extrusion insulation submarine cable - Google Patents
High-voltage and extra-high voltage flexible direct-current power transmission fiber composite extrusion insulation submarine cable Download PDFInfo
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- CN203260363U CN203260363U CN2013201339979U CN201320133997U CN203260363U CN 203260363 U CN203260363 U CN 203260363U CN 2013201339979 U CN2013201339979 U CN 2013201339979U CN 201320133997 U CN201320133997 U CN 201320133997U CN 203260363 U CN203260363 U CN 203260363U
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Abstract
The utility model provides a high-voltage and extra-high voltage flexible direct-current power transmission fiber composite extrusion insulation submarine cable. The center of the cable is provided with a water-resistant conductor. A semi-conduction warping tape layer, an extrusion inner shielding layer, an extrusion insulation layer, an extrusion outer shielding layer, a first buffer water-resistant layer, a second buffer water-resistant layer, a metal sleeve, an extrusion inner sheath, plastic extrusion steel wires and an extrusion outer sheath are sequentially wrapped on the outer side of the water-resistant conductor. A fiber is arranged between the two buffer water-resistant layers. The problem that conventional cable insulation materials suffer electric field distortion or even breakdown due to space charge accumulation is overcome by the insulation layer. The adopted copper sleeve with excellent physical performance such as great mechanical strength and good fatigue strength guarantees the safe and reliable running of the submarine cable. The heavy metal pollution problem caused by a lead sleeve adopted in a conventional submarine cable is further prevented. By making the plastic extrusion steel wires and the extrusion outer sheath wrapped on the inner sheath, the submarine cable can prevent environmental pollution caused by a steel wire anticorrosive layer formed by coating asphalt wrapping plastic ropes on the surfaces of bare steel wires of the conventional submarine cable.
Description
Technical field
The utility model relates to a kind of direct current cables that the seabed is used that is applicable to, especially a kind of flexible DC power transmission optical fiber compound extruded insulation submarine cable.
Background technology
1997, article one flexible direct current cable put into operation in the world, and supplier is ABB AB.Along with the progress of technology, the electric pressure of operation improves constantly, and the electric pressure of the external operation of business flexible direct current cable is 200 kV at present, and ABB AB has completed the type approval test of 320 kV cables in the laboratory.China's power transmission cable mostly is to exchange extrudes insulated cable, only moved a low pressure (30 kV and following) flexible direct current extrusion insulation overland cable in Shanghai, and the flexible direct current extrusion of middle pressure (30 kV are above to 150 kV), high pressure (150 kV more than to 250 kV) and superhigh pressure (more than 250 kV to the 500 kV) submarine cable that insulate did not use also.
In China, middle pressure and the above the most frequently used material of cable conductor are copper.The copper electric conductivity is good, reaches 100 IACS%.In addition, its stable chemical performance, oxidation resistent susceptibility, antiseptic property is excellent, and mechanical strength is large.But the price of copper is comparatively expensive, is generally 3 ~ 4 times of aluminium price.
Traditional direct current cables, its insulated part adopts the paper oil insulation structure more, and namely at the wrapped rectangular cable paper in the conducting paper outside of conductor, the air-gap between wrapped paper adopts insulating oil to fill.Filling forms has two kinds, a kind ofly is viscosity insulating oil dipping, is the direct current oil-impregnated paper insulation cable, and another kind passes into hollow conductor for low viscosity insulating oil, applies certain oil pressure, is the direct current oil-filled cable.The direct current cables of paper oil insulation structure, its insulation resistance are not high especially, thus in insulation Existential Space electric charge not.But after insulating oil leaks, be not easy to decompose, contaminated environment, and also cable paper is that first-class timber is made, and needs to consume the forest reserves.
Because there is shortcoming not green, not environmental protection in the paper oil insulation cable, therefore, developed and extruded cross-linked polyethylene insulated cable.Extrude insulated cable and overcome the problem that the paper oil insulation cable exists aspect green and environmental protection, use in AC network in a large number.
The insulation resistance of extruding insulated cable is high especially, and the space charge in insulator is difficult for releasing, if directly use in direct current network, the Electric Field Distribution in the space charge distortion cable insulation causes that electric field is concentrated, easily causes cable insulation to puncture.At present, have in the world the crosslinked material of direct current of commercialized supply, its working temperature is low is 70 ℃, extrudes 90 ℃ of insulated cable working temperatures lower than existing the interchange.Therefore, in the situation of identical voltage same conductor cross section, its ampacity is that the cable of 90 ℃ is much smaller than working temperature, causes like this transmission line capability little a lot.
In service at direct current cables, the whether projection that contacts of shield semiconductors layer and interfacial dielectric layer has greatly affected the cable insulation level, and even the insulation life of whole cable.Existing knowledge shows, concentrates the generation electric branch aging because projection causes electric field between insulating barrier and shield semiconductors layer, and the semiconductive projection also easily produces space charge and injects insulation.
General submarine cable adopts plumbous cover, but lead is heavy metal, and its mechanical strength and fatigue strength not high, easy cracking in service.Sometimes also need wrapped metal tape to strengthen it on the construction of cable, cause like this complexity of the construction of cable to improve and the cost rising.
In order to increase the axial tension of submarine cable when laying, usually lay one deck or two layers of steel wire outside the cable metal cover, for solving the Anticorrosion Problems of steel wire in seawater, normally apply the wrapped rope made of hemp of pitch or plastic ties outside naked steel wire, pitch causes the workshop pollution and affects producers healthy, also can pollute cargo ship and only reach relevant environment.
Summary of the invention
Deficiency for cable existence in prior art, the purpose of this utility model is to provide a kind of flexible DC power transmission optical fiber compound extruded insulation submarine cable for high pressure and superhigh pressure, can reduce cable cost, can improve breakdown strength and the working temperature of cable insulation, avoid the plumbous cover of traditional extra large cable that the problems such as mechanical damage, heavy metal pollution easily occur, prevent that traditional cable from polluting as the anticorrosion production scene of causing of steel wire and relevant environment due to wrapped bituminous flax cord or bituminous plastic rope.
For achieving the above object, the utility model is by the following technical solutions:
High pressure and superhigh pressure flexible DC power transmission optical fiber compound extruded insulation submarine cable, the center of this cable is water-blocking conductor, and described water-blocking conductor is coated with successively the semiconductive twining package tape outward, extrudes internal shield, extrudes insulating barrier, extrudes outer shielding layer, the first buffering water blocking layer, the second buffering water blocking layer, metallic sheath, extruding inner sheath, ground floor extrusion molding steel wire and/or second layer extrusion molding steel wire, sign chromatape and extrude oversheath; Also be placed with the optical fiber of stainless steel tube protection between described the first buffering water blocking layer and the second buffering water blocking layer.
The thickness of described semiconductive twining package tape is (0.10～0.36) mm; The described internal shield thickness of extruding is (1.0～2.0) mm; The described thickness of insulating layer of extruding is (10.6～30.0) mm; The described outer shielding layer thickness of extruding is (0.6～1.5) mm; The thickness of described the first buffering water blocking layer, the second buffering water blocking layer is respectively (1～3) mm; Described metallic sheath thickness is (0.5～3.8) mm; Described extruding inner sheath thickness is (2～5) mm; Described ground floor extrusion molding steel wire and/or second layer extrusion molding steel wire, steel wire diameter are (4～8) mm, and extrusion molding thickness is (1～2) mm; The described oversheath thickness of extruding is (4～7) mm.
Further, water-blocking conductor is comprised of multiple conducting wires, is arranged in cylindricly, is filled with material water-proof material in the gap of wire, and conductor material is fine aluminium or cable conductor dedicated aluminium alloy or copper; Metallic sheath adopts the wrinkle copper sheathing; The steel wire of extrusion molding steel wire is zinc-coated wire, and plastics are HDPE or semiconductive material; Extrude the insulating barrier employing through the mixture of polyethylene base-material, crosslinking agent and the space charge inhibitor of ultra-clean processing, working temperature reaches 90 ℃; Extrude internal shield and extrude outer shielding layer and all use the crosslinked material of ultra-smooth semiconductive; Inner sheath is PE or semiconductive material; Oversheath adopts the PE material; At the extruding inner sheath with extrude the oversheath appearance and be equipped with lettering, and also be provided with different colours plastics steel wire as sign chromatape between the steel wire of outer extrusion molding steel wire.Optical fiber adopts multimode or single mode or both combinations, is used for cable status monitoring, protection information transmission and communication.
Than prior art, the utlity model has following advantage: (1) adds material water-proof material by selecting fine aluminium or cable conductor dedicated aluminium alloy as conductor, can alleviate cable weight, has reduced significantly the cable cost; (2) insulating barrier use to add the ultra-clean material of space charge inhibitor, and maximum operation temperature reaches 90 ℃, overcome the electric field distortion that the traditional cable Insulation Material causes because space charge gathers and even punctured, and ampacity is more many greatly than 70 ℃ of direct current cables material; (3) by using ultra-smooth semiconductive material, prevented that effectively insulating barrier and shield semiconductors interlayer from because projection causes that the concentrated generation of electric field electric branch is aging, also having suppressed the semiconductive projection and having produced the situation that space charge injects insulation; (4) thus adopt copper sheathing to improve the physical properties such as the mechanical strength of metallic sheath and fatigue strength, avoided operating mechanical damage, prevented the heavy metal pollution problem of plumbous initiation; (5) by wrapped extrusion molding steel wire on inner sheath and extrude oversheath, prevented that traditional extra large cable is in anticorrosion and protection and the environmental pollution that causes as steel wire of the wrapped bituminous flax cord of naked Steel Wire Surface or bituminous plastic rope.
Description of drawings
Fig. 1 is the structural representation of the utility model submarine cable.
Embodiment
Below in conjunction with Fig. 1 and embodiment, the utility model is described in detail.
As shown in Figure 1, flexible DC power transmission is followed successively by with the structure of optical fiber compound extruded insulation submarine cable from inside to outside: water-blocking conductor 11, the how imperial twining package tape 12 of semiconductive spy, semiconductive inner shield 13, extrude insulating barrier 14, semiconductive external shield 15, the first buffering water blocking layer 16, stainless steel tube optical fiber 17, the second buffering water blocking layer 18, wrinkle metallic sheath 19, push inner sheath 110, lettering 111, ground floor extrusion molding steel wire 112, second layer extrusion molding steel wire 113, sign chromatape 114, extrude oversheath 115 and lettering 116.Insulating material of the present utility model adds space charge inhibitor etc. with the PE base-material, and PE base-material ultrapurification is processed and removed impurity, and gathering of the Space-charge that can effectively suppress to insulate improves the cable insulation life-span.The flexible direct current cable extrude inner shield and the crosslinked material of ultra-smooth semiconductive is all used in external shield, prevented that the electric field that causes due to projection from concentrating and space charge injects insulation.Metallic sheath is selected the good copper sheathings of physical property such as mechanical strength and fatigue strength, has guaranteed its safety, reliability service, has overcome the heavy metal pollution problem of the lead cover initiation of traditional extra large cable use.In order to increase the axial tension of submarine cable when laying; wrapped one deck or two-layer extrusion molding steel wire and extrude oversheath on inner sheath have prevented that traditional extra large cable is by wrapped bituminous flax cord or the bituminous plastic rope is anticorrosion as steel wire and protection causes environmental pollution.
Embodiment 1
The present embodiment is rated voltage ± 320 kV flexible DC power transmission optical fiber compound extruded insulation submarine cables.
(1) water-blocking conductor 11, and material is fine aluminium, and sectional area is 1400 mm
2, adopting stranded circular compact conductor structure or milliken conductor structure, material water-proof material is filled in the conductor spacing;
(2) the how imperial twining package tape 12 of semiconductive spy, thickness 0.18 mm;
(3) the semiconductive inner shield 13, thickness 1.5 mm;
(4) extrude insulating barrier 14 for adding the crosslinked material of ultra-clean PE of space charge inhibitor, 90 ℃ of working temperatures, dielectric constant is 2.3, the dc breakdown field intensity is greater than 45 kV/mm, thickness of insulating layer (22～24) mm; The mixture of the crosslinked material of ultra-clean PE and space charge inhibitor is made by the melting mixing method;
(5) the semiconductive external shield 15, thickness 1.2 mm;
(6) first buffering water blocking layers 16, material is semi-conductive buffer water-blocking band, thickness (2～3) mm;
(7) stainless steel tube optical fiber 17, and the optical fiber radical is appropriate;
(8) second buffering water blocking layers 18, material is semi-conductive buffer water-blocking band, thickness (2～3) mm;
(9) the wrinkle metallic sheath 19, and material is copper, and thickness is 0.8 mm;
(10) extruding inner sheath 110, material is PE, thickness 4.1 mm;
(11) lettering 111, adopt protruding seal or white inkjet lettering;
(12) ground floor extrusion molding steel wire 112, steel wire are zinc-coated wire, and plastics are HDPE, and color is black, and steel wire diameter is 6 mm, and extrusion molding thickness is 1 mm;
(13) second layer extrusion molding steel wire 113, steel wire are zinc-coated wire, and plastics are HDPE, and color is yellow, and steel wire diameter is 6 mm, and extrusion molding thickness is 1 mm;
(14) sign chromatape 114, and color is black or yellow;
(15) extrude oversheath 115, material is PE, thickness 6 mm;
(16) lettering 116, adopt protruding seal or white inkjet lettering.
Embodiment 2
The present embodiment is rated voltage ± 200 kV flexible DC power transmission optical fiber compound extruded insulation submarine cables.
(1) water-blocking conductor 11, and material is cable conductor dedicated aluminium alloy or copper, and sectional area is 1000 mm
2, adopting stranded circular compact conductor structure, material water-proof material is filled in the conductor spacing;
(2) the how imperial twining package tape 12 of semiconductive spy, thickness 0.18 mm;
(3) the semiconductive inner shield 13, thickness 1.5 mm;
(4) extrude insulating barrier 14 for adding the crosslinked material of ultra-clean PE of space charge inhibitor, 90 ℃ of working temperatures, dielectric constant is 2.3, the dc breakdown field intensity is greater than 45 kV/mm, thickness of insulating layer (12～14) mm; The mixture of the crosslinked material of ultra-clean PE and space charge inhibitor is made by the melting mixing method;
(5) the semiconductive external shield 15, thickness 1 mm;
(6) first buffering water blocking layers 16, material is semi-conductive buffer water-blocking band, thickness (1.5～2.5) mm;
(7) stainless steel tube optical fiber 17, and the optical fiber radical is appropriate;
(8) second buffering water blocking layers 18, material is semi-conductive buffer water-blocking band, thickness (1.5～2.5) mm;
(9) the wrinkle metallic sheath 19, and material is copper, and thickness is 0.7 mm;
(10) extruding inner sheath 110, material is PE, thickness 3.2 mm;
(11) lettering 111, adopt protruding seal or white inkjet lettering;
(12) ground floor extrusion molding steel wire 112, steel wire are zinc-coated wire, and plastics are HDPE, and color is black, and steel wire diameter is 5 mm, and extrusion molding thickness is 1.5 mm;
(13) second layer extrusion molding steel wire 113, steel wire are zinc-coated wire, and plastics are HDPE, and color is yellow, and steel wire diameter is 5 mm, and extrusion molding thickness is 1.5 mm;
(14) sign chromatape 114, and color is black or yellow;
(15) extrude oversheath 115, material is PE, thickness 5 mm;
(16) lettering 116, adopt protruding seal or white inkjet lettering.
Embodiment 3
The present embodiment is rated voltage ± 160 kV flexible DC power transmission optical fiber compound extruded insulation submarine cables.
(1) water-blocking conductor 11, and material is copper, and sectional area is 500 mm
2, adopting stranded circular compact conductor structure, material water-proof material is filled in the conductor spacing;
(2) semiconductive nylon twining package tape 12, thickness 0.1 mm;
(3) the semiconductive inner shield 13, thickness (1.2～1.5) mm;
(4) extrude insulating barrier 14 for adding the crosslinked material of ultra-clean PE of space charge inhibitor, 90 ℃ of working temperatures, dielectric constant is 2.3, the dc breakdown field intensity is greater than 45 kV/mm, thickness of insulating layer (11～13) mm; The mixture of the crosslinked material of ultra-clean PE and space charge inhibitor is made by the melting mixing method;
(5) the semiconductive external shield 15, thickness 1 mm;
(6) first buffering water blocking layers 16, material is semi-conductive buffer water-blocking band, thickness (1～2) mm;
(7) stainless steel tube optical fiber 17, and the optical fiber radical is appropriate;
(8) second buffering water blocking layers 18, material is semi-conductive buffer water-blocking band, thickness (1～2) mm;
(9) the wrinkle metallic sheath 19, and material is copper, and thickness is 0.6 mm;
(10) extruding inner sheath 110, material is PE, thickness 2.9 mm;
(11) lettering 111, adopt protruding seal or white inkjet lettering;
(12) ground floor extrusion molding steel wire 112, steel wire are zinc-coated wire, and plastics are HDPE, and color is black, and steel wire diameter is 5 mm, and extrusion molding thickness is 1.5 mm;
(13) second layer extrusion molding steel wire 113, steel wire are zinc-coated wire, and plastics are HDPE, and color is yellow, and steel wire diameter is 5 mm, and extrusion molding thickness is 1.5 mm;
(14) sign chromatape 114, and color is black or yellow;
(15) extrude oversheath 115, material is PE, thickness 4.5 mm;
(16) lettering 116, adopt protruding seal or white inkjet lettering.
Claims (5)
- High pressure and superhigh pressure flexible DC power transmission optical fiber compound extruded the insulation submarine cable, it is characterized in that, the center of this cable is water-blocking conductor, and described water-blocking conductor is coated with successively the semiconductive twining package tape outward, extrudes internal shield, extrudes insulating barrier, extrudes outer shielding layer, the first buffering water blocking layer, the second buffering water blocking layer, metallic sheath, extruding inner sheath, extrusion molding steel wire and extrude oversheath; Also be placed with the optical fiber of stainless steel tube protection between described the first buffering water blocking layer and the second buffering water blocking layer.
- 2. high pressure according to claim 1 and superhigh pressure flexible DC power transmission optical fiber compound extruded insulation submarine cable, is characterized in that, the thickness of described semiconductive twining package tape is 0.10 mm～0.36 mm; The described internal shield thickness of extruding is 1.0 mm～2.0 mm; The described thickness of insulating layer of extruding is 10.6 mm～30.0 mm; The described outer shielding layer thickness of extruding is 0.6 mm～1.5 mm; The thickness of described the first buffering water blocking layer, the second buffering water blocking layer is respectively 1 mm～3 mm; Described metallic sheath thickness is 0.5 mm～3.8 mm; Described extruding inner sheath thickness is 2 mm～5 mm; The steel wire diameter of described extrusion molding steel wire is 4 mm～8 mm, and extrusion molding thickness is 1 mm～2 mm; The described oversheath thickness of extruding is 4 mm～7 mm.
- 3. high pressure according to claim 2 and superhigh pressure flexible DC power transmission optical fiber compound extruded insulation submarine cable, is characterized in that, described extrusion molding steel wire adopts one deck or two-layer.
- 4. high pressure according to claim 1 and superhigh pressure flexible DC power transmission optical fiber compound extruded insulation submarine cable, is characterized in that, described optical fiber is multimode and/or single mode.
- High pressure according to claim 1 and superhigh pressure flexible DC power transmission optical fiber compound extruded the insulation submarine cable, it is characterized in that, at described extruding inner sheath with extrude the oversheath appearance and be equipped with lettering, and also be provided with different colours plastics steel wire as sign chromatape between the steel wire of extrusion molding steel wire.
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| CN2013201339979U CN203260363U (en) | 2013-03-22 | 2013-03-22 | High-voltage and extra-high voltage flexible direct-current power transmission fiber composite extrusion insulation submarine cable |
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| CN2013201339979U CN203260363U (en) | 2013-03-22 | 2013-03-22 | High-voltage and extra-high voltage flexible direct-current power transmission fiber composite extrusion insulation submarine cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123825A (en) * | 2013-03-22 | 2013-05-29 | 国网电力科学研究院 | High voltage and ultrahigh voltage flexible direct current transmission optical fiber composite extrusion insulation submarine cable |
| WO2016008377A1 (en) * | 2014-07-16 | 2016-01-21 | 中天科技海缆有限公司 | Environment-friendly anti-marine-borer double-steel-wire armored optical fiber composite submarine cable |
-
2013
- 2013-03-22 CN CN2013201339979U patent/CN203260363U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123825A (en) * | 2013-03-22 | 2013-05-29 | 国网电力科学研究院 | High voltage and ultrahigh voltage flexible direct current transmission optical fiber composite extrusion insulation submarine cable |
| CN103123825B (en) * | 2013-03-22 | 2016-02-03 | 国网电力科学研究院 | High pressure and ultrahigh voltage flexible direct current transmission optical fiber compound extruded insulation submarine cable |
| WO2016008377A1 (en) * | 2014-07-16 | 2016-01-21 | 中天科技海缆有限公司 | Environment-friendly anti-marine-borer double-steel-wire armored optical fiber composite submarine cable |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210003 Co-patentee after: NARI Group Corp. Patentee after: STATE GRID ELECTRIC POWER Research Institute Address before: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210003 Co-patentee before: NANJING NARI Group Corp. Patentee before: STATE GRID ELECTRIC POWER Research Institute |
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| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |
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| CX01 | Expiry of patent term |