CN205140591U - Middling pressure single core cable for aerogenerator - Google Patents
Middling pressure single core cable for aerogenerator Download PDFInfo
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- CN205140591U CN205140591U CN201520995183.5U CN201520995183U CN205140591U CN 205140591 U CN205140591 U CN 205140591U CN 201520995183 U CN201520995183 U CN 201520995183U CN 205140591 U CN205140591 U CN 205140591U
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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 middling pressure single core cable for aerogenerator, the subway cable comprises a conductor cable core, on the conductor sinle silk from inside to outside in proper order the cladding have conductor shield, EP rubbers insulating layer, insulation screen, iron shielded layer and restrictive coating. The utility model discloses compare the three -core cables with the model specification, can bear the weight of bigger current -carrying capacity, generally can exceed about 30%, so, can choose for use the medium voltage cable of less specification to reach the same current -carrying capacity on the one hand to reduce the cable cost, on the other hand, with under model specification and the ambient condition, security in the time of can having bigger surplus to guarantee the medium voltage cable oepration at full load avoids the conductor oepration at full load to cause medium voltage cable to generate heat and influence medium voltage cable's life, improves and aerogenerator reliability of operation and security.
Description
Technical field
The utility model relates to cable, specifically presses single-core cable in a kind of wind-driven generator.
Background technology
In wind generating technology, single-machine capacity is that 2.5MW and above wind turbine generator need to press private cable in employing 35kV, connects the pressure transformer high-pressure side being arranged in nacelle rear and the Medium Voltage Switchgear be positioned at bottom wind-driven generator tower; In use, midium voltage cable saves tower cylinder inside and to dangle about 20m on, the upper end of midium voltage cable along with cabin rotate, lower end is fixed on tower cylinder.
In recent years, marine abundant wind energy resources effectively, is reliably developed by wind generating technology.Because maritime environment is different from land significantly, thus land wind generating technology can 35kV in press private cable cannot be suitable in wind generating technology at sea, this is because: in order to keep stable electric property, need midium voltage cable under the high working voltage of 35kV, can, in special environment for use and service condition, reliably, stably realize reversing frequently.
At present, private cable is pressed to be mainly three core twisted cables in the 35kV that Offshore Wind Power Generation Technology is common.Three core twisted cables compare single-core cable, and under same specification and environmental condition, the ampacity of three-core cable is starkly lower than single-core cable, generally can low go out about 30%.As can be seen here, it is higher to there is manufacturing cost in three-core cable, and does not have excessive surplus to ensure fail safe during cable oepration at full load.
Summary of the invention
Goal of the invention of the present utility model is: for the particularity of above-mentioned the deficiencies in the prior art and private cable, provides a kind of low cost of manufacture, presses single-core cable in wind-driven generator that high, reliable and stable, the suitable especially Offshore Wind Power Generation Technology of fail safe uses.
The technical scheme that the utility model adopts is: a kind of offshore wind generating with in press single-core cable, comprise conductor thread core, described conductor thread core is coated with conductor shield, ethylene propylene rubber insulated layer, insulation screen, metal screen layer and restrictive coating from inside to outside successively.
Described conductor thread core be tin-coated copper answer the structure that tangles.Further, the multiple strand direction of described conductor thread core is identical, and stranded lay ratio is successively decreased successively by internal layer outer layers.
Described conductor shield is composite construction, and this conductor shield is the semiconductive shielding layer composition outside conductor thread core primarily of wrapped semiconductive nylon tape outside conductor thread core and extrusion molding.
Described ethylene propylene rubber insulated layer is mainly middle pressure second third glue-line of 35kV electric pressure.
Described insulation screen is mainly strippable semi-conductive shielding layer.
Described metal screen layer is primarily of wrapped semiconductive nylon tape and silk material shuffling layer composition; Described silk material shuffling layer is tinned copper wire and the combination of filametntary shuffling.
Described restrictive coating is polyurethane elastomer layer.Further, hydrophobic coat is coated with outside described restrictive coating.
The beneficial effects of the utility model are:
1. the utility model compares the three-core cable of same model specification, can carry larger ampacity, generally can exceed about 30%; So, on the one hand the midium voltage cable of selection of small specification identical ampacity can be reached, to reduce cable cost; On the other hand, under same model specification and environmental condition, larger surplus can be had to ensure fail safe during midium voltage cable oepration at full load, avoid conductor oepration at full load cause midium voltage cable to generate heat and affect the useful life of midium voltage cable, improve and ensure wind-driven generator reliability of operation and fail safe;
2. conductor thread core structure of the present utility model effectively ensure that electrical property and the antioxygenic property of conductor, meanwhile, can ensure that midium voltage cable smoothly by the test of low temperature torsion, can make it have good lower temperature resistance and anti-torsion, after tested, its low-temperature torsion resistance performance is-60 DEG C;
3. the ethylene propylene rubber insulated layer that adopts of the utility model and metal screen layer, to the insulation of midium voltage cable, low temperature resistant and mechanical performance has carried out effective lifting, guarantee that midium voltage cable is in twist process frequently, can have good electric property, improve its useful life;
4. the restrictive coating that the utility model adopts not only ensure that midium voltage cable has the performances such as excellent low temperature resistant, hydrolysis, salt spray resistance, acid and alkali-resistance, tear-proof, ensure that midium voltage cable is combined closely with internal core simultaneously, guarantee wrinkle resistant, not bulge in twist process; In addition, the outer coated hydrophobic coat of restrictive coating, ensure that midium voltage cable can run under high salt fog, high humidity atmosphere normal safe;
In sum, properties of the present utility model all meets the technical requirement of wind generating technology centering pressure private cable, and it had both been adapted at using in the wind generating technology of land, be also applicable to and also be particluarly suitable for coastal waters, off-lying sea wind generating technology in use.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Fig. 1 is a kind of structural representation of the present utility model.
Code name implication in figure: 1-tinned copper conductor; 2-conductor shield; 3-ethylene propylene rubber insulated layer; 4-insulation screen; 5-metal screen layer; 6-restrictive coating; 7-hydrophobic coat.
Embodiment
Shown in Figure 1, the utility model is the middle pressure Special single-core cable of wind-driven generator, especially offshore wind generating, it comprises conductor thread core, conductor shield 2, ethylene propylene rubber insulated layer 3, insulation screen 4, metal screen layer 5, restrictive coating 6 and hydrophobic coat 7, conductor shield 2, ethylene propylene rubber insulated layer 3, insulation screen 4, metal screen layer 5, restrictive coating 6 and hydrophobic coat 7, centered by conductor thread core, are coated on the periphery of conductor thread core from inside to outside successively.
Concrete, conductor thread core be tin-coated copper answer the structure that tangles.That is, conductor thread core has multiply tinned copper conductor 1, and per share tinned copper conductor 1 forms primarily of many tin-coated copper monofilament are stranded; The filament diameter between the 5th kind and the 6th kind selected by every root tin-coated copper monofilament, and the elongation at break index of this monofilament is than state absolute altitude more than at least 20%; Multiply tinned copper conductor 1 twists together composition conductor thread core, and their direction of lay is identical with the direction of lay of the tin-coated copper monofilament of sub-thread tinned copper conductor 1, and the stranded lay ratio of multiply tinned copper conductor 1 should be successively decreased successively by internal layer outer layers.
Conductor shield 2 is coated on the periphery of above-mentioned conductor thread core closely.Conductor shield 2 is composite construction, concrete, this conductor shield 2 is the semiconductive shielding layer composition in conductor thread core periphery primarily of the wrapped semiconductive nylon tape in conductor thread core periphery and extrusion molding, namely conductor shield 2 is shaping with semi-conductive tape+semi-conductive layer, the coated semi-conductive layer of extrusion molding is closely extruded on semi-conductive tape lapping layer, plays the effect of homogenizing field intensity.
Ethylene propylene rubber insulated layer 3 is mainly middle pressure second third glue-line of 35kV electric pressure, and it has feature that is low temperature resistant, high-mechanical property.It is when ensureing the normal electric property of cable, and when ensure that the frequent torsion that cable exists in actual moving process, insulation still can keep good mechanical performance and electrical property simultaneously.
Insulation screen 4 is mainly strippable semi-conductive shielding layer.Insulation screen 4 is as semi-conductive layer, and tight extrusion molding is coated on the periphery of ethylene propylene rubber insulated layer 3.
Metal screen layer 5 is primarily of the tight wrapped semiconductive nylon tape in insulation screen 4 periphery and silk material shuffling layer composition, and wherein silk material shuffling layer is tinned copper wire and the combination of filametntary shuffling.Metal screen layer 5 not only can play shielding earial drainage effect in the cable, and can play booster action, cable is not ruptured bearing copper wire in larger twisting resistance situation, ensure that the normal operation that cable is long-term.
Restrictive coating 6 is polyurethane elastomer layer, preferably shaping with double-deck fashion of extrusion.The low cigarette of this restrictive coating 6, Halogen, fire-retardant and high strength, have excellent low temperature resistant, hydrolysis, salt spray resistance, acid and alkali-resistance, tear resistance.Restrictive coating 6 makes whole cable to combine closely, and avoids the bulge phenomenon that conductor thread core and sheath cause owing to there is relative sliding in twist process; In addition, restrictive coating 6 also makes whole cable have good concentricity, and ensure that the smooth surface rounding of cable.
Hydrophobic coat 7 is coated in the periphery of restrictive coating 6, adds the resistance to water of cable.Hydrophobic coat 7 evenly applies in the periphery of restrictive coating 6, it greatly improve the coat layer of power cable 6 be condensed water infiltration cover resistance, avoid cable at sea under high salt fog, high humidity atmosphere, (this moisture film can cause the electric discharge such as corona, electric arc to the moisture film that restrictive coating 6 surface is formed, increase potential safety hazard and electric energy loss, accelerate restrictive coating heating aging, reduce cable useful life).
Concrete technical scheme is only in order to illustrate the utility model above, is not intended to limit.Although be described in detail the utility model with reference to above-mentioned concrete technical scheme, those of ordinary skill in the art has been to be understood that: it still can be modified to above-mentioned concrete technical scheme, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from spirit and scope of the present utility model.
Claims (9)
1. press single-core cable in a wind-driven generator, comprise conductor thread core, it is characterized in that: described conductor thread core is coated with from inside to outside successively conductor shield (2), ethylene propylene rubber insulated layer (3), insulation screen (4), metal screen layer (5) and restrictive coating (6).
2. press single-core cable in wind-driven generator according to claim 1, it is characterized in that: described conductor thread core be tin-coated copper answer the structure that tangles.
3. press single-core cable in wind-driven generator according to claim 2, it is characterized in that: the multiple strand direction of described conductor thread core is identical, and stranded lay ratio is successively decreased successively by internal layer outer layers.
4. press single-core cable in wind-driven generator according to claim 1, it is characterized in that: described conductor shield (2) is composite construction, this conductor shield (2) is the semiconductive shielding layer composition outside conductor thread core primarily of wrapped semiconductive nylon tape outside conductor thread core and extrusion molding.
5. press single-core cable in wind-driven generator according to claim 1, it is characterized in that: described ethylene propylene rubber insulated layer (3) is mainly middle pressure second third glue-line of 35kV electric pressure.
6. press single-core cable in wind-driven generator according to claim 1, it is characterized in that: described insulation screen (4) is mainly strippable semi-conductive shielding layer.
7. press single-core cable in wind-driven generator according to claim 1, it is characterized in that: described metal screen layer (5) is primarily of wrapped semiconductive nylon tape and silk material shuffling layer composition; Described silk material shuffling layer is tinned copper wire and the combination of filametntary shuffling.
8. press single-core cable in wind-driven generator according to claim 1, it is characterized in that: described restrictive coating (6) is polyurethane elastomer layer.
9. press single-core cable in wind-driven generator according to claim 1 or 8, it is characterized in that: outside described restrictive coating (6), be coated with hydrophobic coat (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520995183.5U CN205140591U (en) | 2015-12-03 | 2015-12-03 | Middling pressure single core cable for aerogenerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520995183.5U CN205140591U (en) | 2015-12-03 | 2015-12-03 | Middling pressure single core cable for aerogenerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205140591U true CN205140591U (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520995183.5U Active CN205140591U (en) | 2015-12-03 | 2015-12-03 | Middling pressure single core cable for aerogenerator |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107039117A (en) * | 2017-05-27 | 2017-08-11 | 特变电工(德阳)电缆股份有限公司 | New-energy automobile flexible cable |
| CN107240442A (en) * | 2017-05-25 | 2017-10-10 | 金杯电工衡阳电缆有限公司 | A kind of transformer flexible lead wire cable |
-
2015
- 2015-12-03 CN CN201520995183.5U patent/CN205140591U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107240442A (en) * | 2017-05-25 | 2017-10-10 | 金杯电工衡阳电缆有限公司 | A kind of transformer flexible lead wire cable |
| CN107039117A (en) * | 2017-05-27 | 2017-08-11 | 特变电工(德阳)电缆股份有限公司 | New-energy automobile flexible cable |
| CN107039117B (en) * | 2017-05-27 | 2023-08-25 | 特变电工(德阳)电缆股份有限公司 | Flexible cable for new energy automobile |
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