CN110335719A - High-pressure submarine cable long-distance landing structure - Google Patents

High-pressure submarine cable long-distance landing structure Download PDF

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Publication number
CN110335719A
CN110335719A CN201910531855.XA CN201910531855A CN110335719A CN 110335719 A CN110335719 A CN 110335719A CN 201910531855 A CN201910531855 A CN 201910531855A CN 110335719 A CN110335719 A CN 110335719A
Authority
CN
China
Prior art keywords
long range
layer
insulated wire
stranding
landing structures
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
Application number
CN201910531855.XA
Other languages
Chinese (zh)
Inventor
李春梅
王克
杨建军
潘文林
郦洪柯
管晨晓
邱华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PowerChina Huadong Engineering Corp Ltd
Hengtong Submarine Power Cable Co Ltd
Original Assignee
Hengtong Submarine Power Cable Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hengtong Submarine Power Cable Co Ltd filed Critical Hengtong Submarine Power Cable Co Ltd
Priority to CN201910531855.XA priority Critical patent/CN110335719A/en
Publication of CN110335719A publication Critical patent/CN110335719A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22Metal wires or tapes, e.g. made of steel
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • H01B7/2825Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00Power cables
    • H01B9/02Power cables with screens or conductive layers, e.g. for avoiding large potential gradients

Abstract

The invention discloses a long-distance landing structure of a high-voltage submarine cable, wherein the landing structure and a submarine cable section are integrated into a whole and comprise three-phase insulated wire cores, and the periphery of each phase of insulated wire core is sequentially coated with a semiconductive water-blocking tape and lead alloy; after the three-phase insulated wire cores are twisted, the three-phase insulated wire cores are bound into a cable through cabling, and an inner liner, a metal armor layer and an outer tegument layer are sequentially coated on the periphery of the cabling binding belt; the cabling binding belt is a semi-conductive binding belt; a brass strip is arranged between the cabling binding belt and the inner liner; the brass band and the metal armor layer are short-circuited through conducting layers arranged at intervals. The equipotential can be formed between the insulated wire core and the metal wire armor layer in dry and wet environments, so that the stability, safety and reliability of the high-voltage submarine cable in long-term operation in complex environments are effectively improved; with the integrative structural design of submarine cable section, avoided adopting intermediate head to change the high risk that submarine cable structural style relogin brought, improved the fail safe nature of high-pressure submarine cable operation.

Description

High-pressure undersea cable long range landing structures
Technical field
The present invention relates to high-pressure undersea cable fields, more particularly to a kind of high-pressure undersea cable long range landing structures.
Background technique
Since China coastline is longer, the features such as marine wind speed is high, wind resource is stable, disturbing factor is less, and with The increasing of offshore wind farm supporting dynamics, equipment and installation cost reduce and mating industry is increasingly mature, in recent years China's sea turn Electricity welcomes the accelerated development phase.
The country is built at present and mostly uses two-stage boosting mode in the marine wind electric field power transmission and transformation system built, i.e. blower is sent out After electric energy boosts to 35kV through unit booster apparatus, then boosted station owner's transformer boosts to 220kV, through tri- core sea cable of 220kV The form (high risk for avoiding transition joint from generating) sent out, and sea cable is taken directly to log in more.Since Marine Geology changes, sea There is local land in ocean, leads to log in section and routes longer, logs in section soil usually frequently between drying and humidity, make to log in The complicated multiplicity of environment.When antecedent soil moisture, there are potential difference between the single-phase sea cable lead set of semiconducting protection layer structure and armouring, with Apart from elongated, potential difference, which becomes larger, leads to partial discharge phenomenon, will be so that sea cable hot-spot for laying.Sea cable is under this complex environment Longtime running will affect line security reliability service.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of high-pressure undersea cable long range landing structures, are able to solve because stepping on The problem of appearance potential difference between sea cable core and armor caused by the environmental change of land.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of high-pressure undersea cable long range is provided Landing structures, the landing structures are structure as a whole with sea cable section, the insulated wire cores including three-phase, insulated wire cores described in every phase Periphery is successively coated with semiconductor waterstop and metal;Stranding, institute are bound by stranding after insulated wire cores described in three-phase are twisted The periphery for stating stranding binding strap is successively coated with liner layer, metal armor layers and serving;Wherein, the stranding binding strap is half Conductive binding strap;Brass band is provided between the stranding binding strap and liner layer;Between the brass band and metal armor layers It is shorted by spaced conductive layer.
In a preferred embodiment of the present invention, the distance between two neighboring described conductive layer is 500~1000m.
In a preferred embodiment of the present invention, the conductive layer is copper sheet or proof copper-wire braided net.
In a preferred embodiment of the present invention, the conductive layer is connect with earthing pole.
In a preferred embodiment of the present invention, the insulated wire cores include water-blocking conductor, conductor shield, the poly- second of crosslinking Alkene layer and insulation screen;Wherein, the conductor shield, cross-linked polyethylene layer and insulation screen are with three-layer co-extruded shape out Formula coats the conductor.
In a preferred embodiment of the present invention, the periphery of the metal is coated with semiconductive jacket.
In a preferred embodiment of the present invention, the liner layer and serving are the polypropylene fibre of asphalting bonding Rope.
In a preferred embodiment of the present invention, the wire armor is zinc plated mild carbon steel silk.
In a preferred embodiment of the present invention, on the inside of the semiconductive binding strap, it is located between cable core described in three-phase also It is provided with stranding filler.
In a preferred embodiment of the present invention, the stranding filler is polyethylene packing.
The beneficial effects of the present invention are: a kind of high-pressure undersea cable long range landing structures of the present invention, by semiconductor waterstop, The design and conductive layer and wire armor of metal set, semiconductive binding strap, brass band and conductive layer pass through conductive layer The design of short circuit, so that equipotential can be formed in dry and moist environment between insulated wire cores and wire armor, Effectively improve high-pressure undersea cable long-term running stability and safety and reliability under complex environment;The present invention is with sea cable section Integral structure avoids using transition joint and changes sea cable structure type and logging in bring high risk, improves high-pressure undersea The security reliability of cable operation.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of internal structure of one preferred embodiment of high-pressure undersea cable long range landing structures of the present invention;
Fig. 2 is the short-circuit structure schematic diagram between shown brass band, wire armor and conductive layer;
The components in the drawings are labeled as follows: 1. water-blocking conductors, 2. conductor shields, 3. cross-linked polyethylene layers, 4. insulation shieldings Layer, 5. semiconductor waterstops, 6. metal sets, 7. semiconductive jackets, 8. stranding binding straps, 9. brass bands, 10. liner layers, 11. Metal armor layers, 12. servings, the filling of 13. strandings, 14. conductive layers.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Fig. 1 and Fig. 2 are please referred to, the embodiment of the present invention includes:
Embodiment 1
Present invention discloses a kind of high-pressure undersea cable long range landing structures, are structure as a whole with sea cable section, the core including three-phase, The periphery of core described in every phase is successively coated with semiconductor waterstop 5 and metal set 6;Pass through into after core described in three-phase is twisted Cable binding strap 8 binds stranding, and the periphery of the stranding binding strap 8 is successively coated with brass band 9, liner layer 10, metal armor layers 11 and serving 12.8 semiconductive binding straps of the stranding binding strap.
Specifically, every phase core is Zi in outside successively including water-blocking conductor 1, conductor shield 2,3 and of cross-linked polyethylene layer Insulation screen 4;Wherein, the conductor shield 2, cross-linked polyethylene layer 3 and insulation screen 4 are in three-layer co-extruded form out Coat the water-blocking conductor 1;The electrician's circle for the layer material (such as semiconductor waterstop) that blocks water is added when the water-blocking conductor 1 is twisted The twisted round compacted comductor of copper wire.
The semiconductor waterstop 5 plays the role of longitudinal water-blocking outside insulated wire cores.
The metal set 6 plays the role of radial water-resisting;The periphery of the metal set 6 is also wrapped on semiconductive jacket On the one hand 7, specially semiconductive PE sheath play the role of protecting metal set 6, on the other hand, make logging in for high-pressure undersea cable Structure is forming equipotential between realization metal set 6 and wire armor 11 under environment with water, to avoid sea It discharges between cable cable core and wire armor because of potential difference.
The liner layer 10 and serving 12 are the polypropylene fiber rope of asphalting bonding, play the work of anti-corrosion protection With.
The wire armor 11 is zinc plated mild carbon steel silk, tension needed for bearing sea cable transport, laid processes.
8 inside of semiconductive binding strap, is additionally provided with stranding filler 13, the stranding is filled out between three-phase cable core 13 are filled for polyethylene packing.
It is shorted between the brass band 9 and metal armor layers 11 by spaced conductive layer 14, the conductive layer 14 It is connect with earthing pole.Specifically, the conductive layer 14 is copper sheet or proof copper-wire braided net, between the two neighboring conductive layer 14 Distance is 500~1000m.Pass through setting for semiconductor waterstop 5, metal set 6, semiconductive jacket 7 and semiconductive binding strap 8 Meter realizes brass band 9 and line so that good can contact between the brass band 9 and core that are coated on outside semiconductive binding strap 8 Core equipotential;It is acted on by the short circuit of conductive layer 14 again so that form equipotential between brass band 9 and wire armor 11, from And ensure that under dry environment, equipotential is formed between insulated wire cores and wire armor 11, is logged in solve There are problems that potential difference between sea cable cable core and wire armor when section dry soil and discharge.
In addition, the design of above-mentioned landing structures, avoids using transition joint and change sea cable structure type and logging in band The high risk come improves the security reliability of high-pressure undersea cable operation.
A kind of high-pressure undersea cable long range landing structures of the present invention are bound by semiconductor waterstop, metal set, semiconductive The design that band, the design and conductive layer of brass band and conductive layer and wire armor are shorted by conductive layer, so that insulation Equipotential can be formed in dry and moist environment between core and wire armor, high-pressure undersea cable is effectively improved and exists Long-term running stability and safety and reliability under complex environment.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "left", "right", "inner", "outside" Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when usually put Orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning Or element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention. The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, and comes for those skilled in the art It says, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any modification, equivalent Replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of high-pressure undersea cable long range landing structures, which is characterized in that the landing structures are structure as a whole with sea cable section, packet The insulated wire cores of three-phase are included, the periphery of insulated wire cores described in every phase is successively coated with semiconductor waterstop and metal;Three-phase institute It states and stranding is bound by stranding after insulated wire cores are twisted, the periphery of the stranding binding strap is successively coated with liner layer, metal armour Fill layer and serving;Wherein, the stranding binding strap is semiconductive binding strap;It is arranged between the stranding binding strap and liner layer There is brass band;It is shorted between the brass band and metal armor layers by spaced conductive layer.
2. high-pressure undersea cable long range landing structures according to claim 1, which is characterized in that the two neighboring conductive layer The distance between be 500~1000m.
3. high-pressure undersea cable long range landing structures according to claim 2, which is characterized in that the conductive layer be copper sheet or Proof copper-wire braided net.
4. high-pressure undersea cable long range landing structures according to claim 2, which is characterized in that the conductive layer and earthing pole Connection.
5. high-pressure undersea cable long range landing structures according to claim 1, which is characterized in that the insulated wire cores include resistance Water conductor, conductor shielding layer, cross-linked polyethylene layer and insulation screen;Wherein, the conductor shield, cross-linked polyethylene layer and Insulation screen coats the conductor in three-layer co-extruded form out.
6. high-pressure undersea cable long range landing structures according to claim 1, which is characterized in that wrap the periphery of the metal It is covered with semiconductive jacket.
7. high-pressure undersea cable long range landing structures according to claim 1, which is characterized in that the liner layer and serving For the polypropylene fiber rope of asphalting bonding.
8. high-pressure undersea cable long range landing structures according to claim 1, which is characterized in that the wire armor is Zinc plated mild carbon steel silk.
9. high-pressure undersea cable long range landing structures according to claim 1, which is characterized in that in the semiconductive binding strap Side is additionally provided with stranding filler between cable core described in three-phase.
10. high-pressure undersea cable long range landing structures according to claim 9, which is characterized in that the stranding filler is Polyethylene packing.
CN201910531855.XA 2019-06-19 2019-06-19 High-pressure submarine cable long-distance landing structure Pending CN110335719A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910531855.XA CN110335719A (en) 2019-06-19 2019-06-19 High-pressure submarine cable long-distance landing structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910531855.XA CN110335719A (en) 2019-06-19 2019-06-19 High-pressure submarine cable long-distance landing structure

Publications (1)

Publication Number Publication Date
CN110335719A true CN110335719A (en) 2019-10-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910531855.XA Pending CN110335719A (en) 2019-06-19 2019-06-19 High-pressure submarine cable long-distance landing structure

Country Status (1)

Country Link
CN (1) CN110335719A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111554435A (en) * 2020-05-14 2020-08-18 中天科技海缆有限公司 Multi-core direct-current submarine cable and production method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111554435A (en) * 2020-05-14 2020-08-18 中天科技海缆有限公司 Multi-core direct-current submarine cable and production method thereof
CN111554435B (en) * 2020-05-14 2021-12-28 中天科技海缆股份有限公司 Multi-core direct-current submarine cable and production method thereof

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Effective date of registration: 20200827

Address after: 215500, Tongda Road, Changshou City Economic Development Zone, Jiangsu, Suzhou, 8

Applicant after: Hengtong Submarine Power Cable Co.,Ltd.

Applicant after: POWERCHINA HUADONG ENGINEERING Corp.,Ltd.

Address before: 215500, Tongda Road, Changshou City Economic Development Zone, Jiangsu, Suzhou, 8

Applicant before: Hengtong Submarine Power Cable Co.,Ltd.