CN104376906A - Aluminum alloy halogen-free environmentally-friendly direct current cable for distributed photovoltaic system - Google Patents
Aluminum alloy halogen-free environmentally-friendly direct current cable for distributed photovoltaic system Download PDFInfo
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- CN104376906A CN104376906A CN201410662778.9A CN201410662778A CN104376906A CN 104376906 A CN104376906 A CN 104376906A CN 201410662778 A CN201410662778 A CN 201410662778A CN 104376906 A CN104376906 A CN 104376906A
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Abstract
The invention discloses an aluminum alloy halogen-free environmentally-friendly direct current cable for a distributed photovoltaic system. The aluminum alloy halogen-free environmentally-friendly direct current cable comprises 8000 serial electric grade aluminum alloy materials, and the direct current cable is an aluminum alloy conductor (1) between a 2-type conductor and a 5-type conductor of the GB/T3956 cable in structure. The 125 DEG C irradiation crosslinking halogen-free low-smoke flame retardant polyolefin insulating materials are arranged outside the conductor (1) in an extruded mode to form an insulating layer (2). Two insulating wire cores are arranged in parallel, and irradiation crosslinking is conducted on the insulating layer. Then, protecting bush materials of the 125 DEG C irradiation crosslinking halogen-free low-smoke flame retardant polyolefin are extruded to form an outer protecting bush (3), irradiation crosslinking is conducted on the outer protecting bush (3), and the cable is made into a dumbbell-shaped flat cable. By the adoption of the aluminum alloy halogen-free environmentally-friendly direct current cable, the conductor has excellent flexibility performance, extension performance, corrosion resistance performance and creep resistance performance, and the cable is resistant to high temperature, resistant to low temperature, resistant to heat and humidity, resistant to acid and alkali, resistant to ozone, resistant to purple sunlight aging, free of halogen, resistant to flame, capable of protecting the environment, and high in price performance ratio.
Description
Technical field
The present invention relates to a kind of distributed photovoltaic system aluminium alloy halogen-free environment-friendly type direct current cables, belong to technical field of electric wires and cables.
Background technology
In current China photovoltaic system, cable used all adopts the PV-cable (cable for photovoltaic module) of TUV Technology Co., Ltd. standard 2pfg1169/08, and conductor is 5 class tin-coated copper cored structures.Due to China's copper shortage of resources, price is high, and therefore photovoltaic system cable cost is higher.And China than more rich be bauxite resource, but the creep resistant of common electrical aluminium and extension property poor, cause the poor stability in cable running, so the power cable making conductor wire core with aluminium in China is less.
Along with the aluminum alloy materials of 8000 series is produced in batches in China, 8000 series alloys are adopted to become a kind of possibility as conductor.The conductor adopting 8000 series alloys to make power cable early has precedent, and such as, in north america such as the U.S., the supply line of 90% all adopts 8000 series alloys to make the conductor of power cable, and through long-time running and detection validation, its performance safety is reliable.But the aluminum alloy materials of 8000 series is applied to photovoltaic system, is especially in the distributed photovoltaic system of current domestic extensive development, is not still achieved.This is because: (1), for the aluminium alloy conductor in photovoltaic system, not only needs electric conductivity to reach the requirement of electrician's aluminium, also requires softness, flexible; (2) aluminium alloy from pole stock be drawn into 5 class conductor monofilament wire diameters comparatively difficulty, cost is too high; (3) because the construction of cable is flat twin cable, if irradiation processing adopts the method identical with ordinary copper core photovoltaic cable, namely an irradiation completes, and insulation property cannot meet product design requirement.
summary of the invention:
For overcoming the defect of prior art, the invention provides a kind of distributed photovoltaic system aluminium alloy halogen-free environment-friendly type direct current cables, being applied in distributed photovoltaic power generation system the DC line be discharged between inverter of confluxing.
The present invention adopts following technical scheme:
1, a distributed photovoltaic system aluminium alloy halogen-free environment-friendly type direct current cables, comprising: aluminium alloy conductor, insulating barrier and oversheath.The outer extruded insulation layer of conductor, form insulated wire cores, extrude oversheath after two insulated wire cores parallel arranged, the construction of cable is twin-core dumb-bell shape cable.
2, aluminium alloy conductor adopts 8000 series alloys, and its structure is (such as when cross-sectional area of conductor is 35mm between the 2 class conductors of GB/T3956
2, its conductor structure adopts 7,2.60mm single line by 1+6 arrangement stranded) and 5 class conductors (such as when cross-sectional area of conductor is 35mm
2, its conductor structure adopts 276,0.4mm single line, first adopts 23 to carry out bundle and is twisted into 12 strands, more stranded with the arrangement of 3+9 by 12 strands) between, be 35mm as worked as cross-sectional area of conductor
2its conductor structure: we have employed 19,1.56 mm single line, stranded and press and form by the regular stranded mode of 1+6+12, so both solve aluminium alloy and be drawn into 5 class conductor monofilament wire diameters comparatively difficulty (aluminum or aluminum alloy conductor only has 1 class or 2 class conductor structures among GB/T3956), problem that cost is too high from pole stock, can go again to meet the soft and flexible requirement of cable as far as possible; After stranded, 280 DEG C ~ 320 DEG C, the integrally annealed process of 2h are carried out to conductor, the percentage elongation of conductor single line is made to control between 25% ~ 30%, aluminium alloy conductor through this process not only can improve conductance, ensure that its conductor resistance reaches the requirement of electrician's aluminium, conductor can also be made more soft and flexible.
3, insulating barrier adopts the insulating material of 125 DEG C of irradiation crosslinking halogen-free low-smoke flame-proof polyolefins to extrude to form, and this insulating barrier has excellent electrical insulation capability, high temperature resistant (125 DEG C), resistance to low temperature, acid-proof alkaline, wet-hot aging performance, weather-resistant property and low-smoke non-halogen flame-retardant performance.
4, oversheath adopts 125 DEG C of polyolefinic sheath materials of cross-linking radiation environmental protection high flame retardant to extrude to form, and oversheath has excellent high temperature resistant (125 DEG C), resistance to low temperature, acid-proof alkaline, wet-hot aging performance, weather-resistant property, resistance to and environmental protection flame retardant performance.
Extrude front two insulated wire cores of oversheath without the need to twisting, but adopt parallel arranged when extruding sheath, have 1 ~ 2mm long between two core oversheaths, the band that 0.5 ~ 1mm is thick is connected, and sheath entirety is dumbbell shaped.
5, two steps are divided into the irradiation processing of cable.First at the outer extruded insulation layer of conductor, and adopt electron accelerator to carry out cross-linking radiation to insulating barrier, then outside two insulated wire cores, extrude oversheath, then adopt electron accelerator to carry out cross-linking radiation to oversheath.The control of the degree of cross linking: be as the criterion with hot elongation test value, this cable insulation and the extension of oversheath heat control respectively between 50 ~ 80% and 30 ~ 50%.
Accompanying drawing explanation
Fig. 1 is the structural representation of cable of the present invention.
1 conductor, 2 insulating barriers, 3 oversheaths.
Embodiment
Below by way of concrete execution mode, and the invention will be further described by reference to the accompanying drawings.
As shown in Figure 1, distributed photovoltaic system aluminium alloy halogen-free environment-friendly type direct current cables, comprise cable aluminium alloy conductor (1), the outer extruded insulation layer (2) of conductor (1), form insulated wire cores, extrude oversheath (3) after two insulated wire cores parallel arranged, make flat cable, two core oversheaths (3) are slightly connected.In the present embodiment, conductor (1) cross section is 35mm
2.
Conductor (1) adopts 8000 series alloys, and conductor structure can adopt such as 19, and 1.56mm single line forms by 1+6+12 normally ordering is stranded.Insulating barrier (2) adopts the insulating material of 125 DEG C of irradiation crosslinking halogen-free low-smoke flame-proof polyolefins to extrude and forms, and oversheath (3) adopts 125 DEG C of polyolefinic sheath materials of cross-linking radiation environmental protection high flame retardant to extrude and forms.
Twice is divided into the irradiation processing of cable, first forms insulated wire cores at the outer extruded insulation layer (2) of conductor, and cross-linking radiation is carried out to insulating barrier (2), then outside insulating barrier (2), extrude oversheath (3).Extrude oversheath (3) front, two insulated wire cores without the need to twisting, but adopt parallel arranged when extruding oversheath (3), oversheath is made dumbbell shaped, have 1 ~ 2mm long between two core oversheaths, the band that 0.5 ~ 1mm is thick is connected, and finally carries out cross-linking radiation to oversheath (3).
The technical performance index of cable of the present invention:
2.1 DC rated voltages: 1.8/3kV.
2.2 cables the highest long-term permission working temperature: 125 DEG C, the short time allows to reach: 250 DEG C.
2.3 conductor resistances meet the regulation of aluminium conductor in 3956 20 DEG C time.
2.4 manufacture test voltage: 6500V/5min.
2.5 insulation resistances: be not less than 1000M Ω/km 20 DEG C time.
2.6 acid and alkali-resistance solution trials: tensile strength change≤± 30%, elongation at break >=100%.
2.7 low-temperature tests: temperature-40 DEG C, carry out after the cooling of time 16h impacting and bend test, cable surface does not ftracture.
2.8 finished product ozone resistance tests: through 72h ozone resistance test, cable surface is without cracking phenomena.
2.9 finished product day light aging test: after 720h day light aging test, cable surface free from flaw.
2.10 without smoke performance: light transmittance >=60%
2.11 content of halogen is tested
2.11.1 PH and conductance: pH value >=4.3, conductivity≤10 μ S/mm;
2.11.2 Cl and Br content: HCL≤0.5%; HBr≤0.5%;
2.11.3 F content :≤0.1%.
2.12 testing vertical flammabilities: the testing vertical flammability specified by GB/T 18380.12-2008.
2.13 insulation, sheath material mechanical performance:
Insulation tensile strength>=6.5N/mm before aging
2, elongation at break>=125%, sheath tensile strength>=8.0N/mm
2, elongation at break>=125%.
After (150 ± 2) DEG C, 7 × 24h are aging, insulation and sheath aging front and back tensile strength change≤-30%, insulation and sheath aging front and back elongation at break rate of change≤-30%.
The hot elongation test of 2.14 insulation and sheath
The median of insulation and sheath percentage elongation should be not more than 100%.
2.15 the thermal life
Carry out according to IEC 60216-1, IEC60216-2 Arrhenius curve, temperature index is 120 DEG C.Time 5000h.Insulation and sheath reserved elongation at break: >=50%.Carry out bend test under room temperature afterwards.Coupon diameter is 2 times of the outside diameter of cable, and after test, jacket surface does not have eyesight visible crack.Useful life: 25 years.
Distributed photovoltaic system aluminium alloy halogen-free environment-friendly type direct current cables provided by the present invention, has following technique effect:
(1) conductor after processing, current capacity and aluminium core are suitable, are 61% of copper conductor, creep-resistant property and extension property good, close to copper, and be corrosion-resistantly better than copper with compression joint performance.And aluminum-alloy conductor material cost is about 20% of copper conductor material cost, construction investment cost can reduce by 30%.Therefore cost performance is far above existing copper core list core photovoltaic cable.
(2) flexibility of cable and bending property splendid, design and user's requirement of distributed photovoltaic system cable can be met.
(3) have low cigarette, Halogen and fire-retardant characteristic, the secondary disaster of cable under Fire Conditions greatly reduces, and can not cause negative effect to environmental protection, belongs to environmental protection class cable.High temperature resistant, low temperature resistant, wet-heat resisting, acid and alkali-resistance, resistance to ozone, resistance to purple day light aging, reach more than 25 years useful life.
(4) light, the cable of cable weight replaces original two single-core cables, makes dumbbell shaped again, and twin-core is easily separated, installs more convenient.
The above, be only better possible embodiments of the present invention, be not limited to interest field of the present invention, the equivalent structure change that all utilizations specification of the present invention and accompanying drawing content are done, and is all contained within interest field of the present invention.
Claims (1)
1. a distributed photovoltaic system aluminium alloy halogen-free environment-friendly type direct current cables, comprise the aluminium alloy conductor (1) of cable, the outer extruded insulation layer (2) of aluminium alloy conductor (1) forms insulated wire cores, extrude the dumbbell shaped flat cable that oversheath (3) is made after two insulated wire cores parallel arranged, it is characterized in that:
Described aluminium alloy conductor (1) adopts the aluminum alloy materials of 8000 series, and conductor structure between 2 class conductors and 5 class conductors, and adopts regular stranded and core integrally annealed process to form, and conductor is soft, flexible;
Described insulating barrier (2) is the insulating material extruding 125 DEG C of irradiation crosslinking halogen-free low-smoke flame-proof polyolefins on conductor (1), then carries out cross-linking radiation through electron accelerator; Described oversheath (3) first extrudes 125 DEG C of polyolefinic sheath materials of cross-linking radiation environmental protection high flame retardant, then process through cross-linking radiation; Extrude front two insulated wire cores of oversheath (3) without the need to twisting, but adopt parallel arranged when extruding sheath, two core sheaths are slightly connected, and sheath entirety is made for dumbbell shaped.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410662778.9A CN104376906A (en) | 2014-11-20 | 2014-11-20 | Aluminum alloy halogen-free environmentally-friendly direct current cable for distributed photovoltaic system |
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| CN201410662778.9A CN104376906A (en) | 2014-11-20 | 2014-11-20 | Aluminum alloy halogen-free environmentally-friendly direct current cable for distributed photovoltaic system |
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| CN104376906A true CN104376906A (en) | 2015-02-25 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201274185Y (en) * | 2008-09-29 | 2009-07-15 | 江苏亨通线缆科技有限公司 | Photoelectric fire-retarding electric cable in 8 font shape |
| CN101587761A (en) * | 2008-05-21 | 2009-11-25 | 上海电缆厂十分厂 | Weatherproof solar photovoltaic cable and fabricating method thereof |
| CN201754349U (en) * | 2010-07-21 | 2011-03-02 | 湖南金杯电缆有限公司 | Polyvinyl chloride flat cable with insulation polyvinyl chloride sheath being torn easily |
| US20110209898A1 (en) * | 2010-02-17 | 2011-09-01 | Hitachi Cable, Ltd. | Radiation resistant electric wire and radiation resistant cable |
| CN202632798U (en) * | 2012-04-16 | 2012-12-26 | 中特华星电缆股份有限公司 | New energy automobile DC charging special-purpose cable |
| CN203931593U (en) * | 2014-04-02 | 2014-11-05 | 安徽新亚特电缆集团有限公司 | A kind of heat-resistant ultraviolet ray aluminium alloy lv power cable |
| CN204288865U (en) * | 2014-11-20 | 2015-04-22 | 江苏双登电力科技有限公司 | Distributed photovoltaic system aluminium alloy halogen-free environment-friendly type direct current cables |
-
2014
- 2014-11-20 CN CN201410662778.9A patent/CN104376906A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587761A (en) * | 2008-05-21 | 2009-11-25 | 上海电缆厂十分厂 | Weatherproof solar photovoltaic cable and fabricating method thereof |
| CN201274185Y (en) * | 2008-09-29 | 2009-07-15 | 江苏亨通线缆科技有限公司 | Photoelectric fire-retarding electric cable in 8 font shape |
| US20110209898A1 (en) * | 2010-02-17 | 2011-09-01 | Hitachi Cable, Ltd. | Radiation resistant electric wire and radiation resistant cable |
| CN201754349U (en) * | 2010-07-21 | 2011-03-02 | 湖南金杯电缆有限公司 | Polyvinyl chloride flat cable with insulation polyvinyl chloride sheath being torn easily |
| CN202632798U (en) * | 2012-04-16 | 2012-12-26 | 中特华星电缆股份有限公司 | New energy automobile DC charging special-purpose cable |
| CN203931593U (en) * | 2014-04-02 | 2014-11-05 | 安徽新亚特电缆集团有限公司 | A kind of heat-resistant ultraviolet ray aluminium alloy lv power cable |
| CN204288865U (en) * | 2014-11-20 | 2015-04-22 | 江苏双登电力科技有限公司 | Distributed photovoltaic system aluminium alloy halogen-free environment-friendly type direct current cables |
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Application publication date: 20150225 |