CN201590287U

CN201590287U - Power cable for low-impedance photovoltaic system

Info

Publication number: CN201590287U
Application number: CN2010201069779U
Authority: CN
Inventors: 潘晨曦; 许忠生; 宋洪波
Original assignee: Shanghai Jinyou Jinhong Wire & Cable Co Ltd
Current assignee: Shanghai Jinyou Jin Hong intelligent electrical Limited by Share Ltd
Priority date: 2010-02-03
Filing date: 2010-02-03
Publication date: 2010-09-22
Anticipated expiration: 2020-02-03

Abstract

The utility model discloses a power cable for a low-impedance photovoltaic system and belongs to the field of the power cables. The structure of the power cable consists of a conductor, an insulating layer, a filler, tape layers, an inner sheath, a metal armor layer and an outer sheath, wherein the insulating layer is extruded outside the conductor; the conductor and the insulating layer form insulated cores; the filler is arranged among the insulated cores; the tape layers are arranged among the insulated cores and the inner sheath; the outer surface of the inner sheath is wound and coated with the metal armor layer; the outer sheath is extruded outside the metal armor layer; the insulating layer adopts low-smoke halogen-free flame-retardant environment-friendly polyolefin materials with low dielectric constant; and the inner sheath and the outer sheath are made of the low smoke halogen free-flame retardant environment-friendly polyolefin materials. The power cable can reduce loss during power transmission process, stably operate within the drastic temperature change range of -40-125 DEG C and satisfy the requirements of solar power stations and photovoltaic power systems.

Description

Low ESR photovoltaic system power cable

Technical field

The utility model relates to a kind of power cable, and especially, the utility model is the Low ESR photovoltaic system power cable that a kind of improved electric energy transmitting efficient that is used for photovoltaic system reduces loss.

Background technology

Solar power generation is optimal new forms of energy, solar power generation is meant the generation mode that need not directly luminous energy to be changed into by thermal process electric energy, it comprises photovoltaic generation, photochemistry Generate, Generation, Generator induction generating and the generating of photoproduction thing, photovoltaic generation is to utilize the solar level semi-conductor electronic device to absorb the solar radiation energy effectively, and make it to be transformed into the direct generation of electricity mode of electric energy, be the main flow of current solar power generation.

Along with development of modern industry; global energy crisis and atmosphere polluting problem become increasingly conspicuous; solar energy has been subjected to the attention of many countries as desirable regenerative resource; the kind of solar photovoltaic assembly is on the increase at present, range of application is wide day by day, market scale progressively enlarges; world's photovoltaic module is 15 annual average rates of increase about 15% in the past; the later stage nineties 20th century, develop rapidlyer, photovoltaic module production in 1999 reaches 200 megawatts.

In regenerative resource, solar energy is inexhaustible, and clean and safe is desirable regenerative resource, and the solar energy resources of China is abundanter, and distribution is wider, and the development potentiality of solar energy power generating is huge; In addition, at present solar photovoltaic technology reaches its maturity, is one of renewable energy technologies of tool sustainable development; By 2004, the application of solar energy power generating spreads all over the various aspects of our life, as traffic, communication, communal facility (as illumination), family life electricity consumption etc., especially in the outlying district, solar energy power generating shows its advantage more, China 30000 villages of still having an appointment at present, 7,000,000 families, 3,000 ten thousand rural area personnel are also of no use to power on, 60% the serious short of electricity in electric county arranged, the photovoltaic market potential is huge, and the market mainstream of Chinese photovoltaic generation will turn to grid-connected system by stand alone generating system, comprises photovoltaic plant and wind generator system.

The characteristics of solar photovoltaic generation system, determined the particularity of the cable that matches with it, solar photovoltaic power plant generally is set up in the desert, the grassland, border on the sea area and roof, city, this just requires transmission of electricity not only will have high-low temperature resistant with cable, anti-ozone, uvioresistant, wear-resisting, anticorrosion, lightning protection, characteristics such as mouse bite preventing, and existing photovoltaic system adopts polyvinyl chloride insulation and polyvinyl chloride oversheath with cable, through long-term solar light irradiation, wind and rain and ozone corrode the back cable surface be full of cracks can occur, the physical and mechanical properties of product is reduced greatly, make electric wire exist more hidden danger when in photovoltaic system, using, might cause the damage of photovoltaic generation special equipment, and then influencing life-span of whole system, existing in addition photovoltaic system is too high with the loss of cable circuit in the long distance power transmission process.

Summary of the invention

In order to satisfy the requirement that can normally move that solar photovoltaic power plant proposes cable under particular surroundings, and reach the purpose of minimizing loss in its transmission of electricity process, the utility model provides a kind of Low ESR photovoltaic system power cable.

The purpose of this utility model realizes by the following technical solutions;

A kind of Low ESR photovoltaic system power cable, constitute by conductor, insulating barrier, inserts, belting layer, inner sheath, metal armouring layer and oversheath, insulating barrier extrudes outside conductor, conductor and insulating barrier constitute insulated wire cores, inserts is set between the insulated wire cores, between insulated wire cores and the inner sheath belting layer is set, the inner sheath outer surface is surrounded with the metal armouring layer, and the metal armouring layer is extruded with oversheath outward.

Described conductor is copper conductor or the tin-coated copper conductor that many strand systems of seven of two classes or five classes form.

Described insulated wire cores has two groups at least, its outer belting layer that is surrounded with.

Described belting layer, wrapped outside insulated wire cores, its outer inner sheath that is extruded with.

Described insulating barrier, by alpha-olefins such as ethene, propylene, 1-butylene, 1-amylene, 1-hexene, 1-octene, 4-methyl-1-pentene and the independent polymerization of some cycloolefin or combined polymerization and a class low-smoke non-halogen flame-retardant environment-friendly polyolefin material of the low-k that obtains, can reduce reactance, reach the purpose that reduces impedance and reduce transmission losses.

Described inner sheath and oversheath are by alpha-olefins such as ethene, propylene, 1-butylene, 1-amylene, 1-hexene, 1-octene, 4-methyl-1-pentene and the independent polymerization of some cycloolefin or combined polymerization and a class low-smoke non-halogen flame-retardant environment-friendly polyolefin material that obtains, and add compositions such as fire retardant, anti ultraviolet agent, light stabilizer, and meet the ROHS environmental requirement.

The utility model is simple and reasonable, be easy to manufacture, product stability is good, the cable of making has heat aging property, hot strength, better mechanical properties such as elongation at break, long service life, also have low temperature resistant, anti-ozone, weather-proof, anti-direct voltage, anti-advantage such as dynamically penetrate, and the field that can directly be laid in, need not buried and poling just can be rainproof, snow, hail, dust storm, high temperature, low temperature, smog, unfirmly closing, animal bites, chemical substance, short-time overload capacity is strong, and ampacity is big, wind-force such as waves at mechanical external force, can stable operation in-40 ℃～125 ℃ rapid excursions of temperature, can satisfy solar power station, the needs of photovoltaic power system.

Description of drawings

Fig. 1 is the structural representation of the utility model one embodiment.

Among the figure: 1-conductor, 2-insulating barrier, 3-inserts, 4-belting layer, 5-inner sheath, 6-metal armouring layer, 7-oversheath.

Embodiment

Below in conjunction with drawings and the embodiments the utility model is described in further detail;

With reference to Fig. 1, Low ESR photovoltaic system power cable, structure is made of conductor, insulating barrier, inserts, belting layer, inner sheath, metal armouring layer and oversheath, insulating barrier extrudes outside conductor, and conductor and insulating barrier constitute insulated wire cores, and inserts is set between the insulated wire cores, between insulated wire cores and the inner sheath belting layer is set, the inner sheath outer surface is surrounded with the metal armouring layer, and the metal armouring layer is extruded with oversheath outward

Further, described conductor is copper conductor or the tin-coated copper conductor that seven of two classes or many strand systems of five classes form.

Further, described belting layer is used for the coated insulation core, its outer inner sheath that is extruded with.

Further, described insulated wire cores has two groups at least, its outer belting layer that is surrounded with.

Further, described insulating barrier is by alpha-olefins such as ethene, propylene, 1-butylene, 1-amylene, 1-hexene, 1-octene, 4-methyl-1-pentene and the independent polymerization of some cycloolefin or combined polymerization and a class low-smoke non-halogen flame-retardant environment-friendly polyolefin material of the low-k that obtains, reduce reactance, reached the purpose that reduces impedance and reduce transmission losses.

Further, described sheath and oversheath are by alpha-olefins such as ethene, propylene, 1-butylene, 1-amylene, 1-hexene, 1-octene, 4-methyl-1-pentene and the independent polymerization of some cycloolefin or combined polymerization and a class low-smoke non-halogen flame-retardant environment-friendly polyolefin material that obtains, and add compositions such as fire retardant, anti ultraviolet agent, light stabilizer, and meet the ROHS environmental requirement.

Claims

1. Low ESR photovoltaic system power cable, it is characterized in that, structure is made of conductor, insulating barrier, inserts, belting layer, inner sheath, metal armouring layer and oversheath, insulating barrier extrudes outside conductor, conductor and insulating barrier constitute insulated wire cores, and inserts is set between the insulated wire cores, between insulated wire cores and the inner sheath belting layer are set, the inner sheath outer surface is surrounded with the metal armouring layer, and the metal armouring layer is extruded with oversheath outward.

2. Low ESR photovoltaic system power cable according to claim 1 is characterized in that, described conductor is seven of two classes or many copper conductors of five classes or tin-coated copper conductor.

3. Low ESR photovoltaic system power cable according to claim 1 is characterized in that, described insulated wire cores has two groups at least, its outer belting layer that is surrounded with.

4. Low ESR photovoltaic system power cable according to claim 1 is characterized in that, described insulating barrier is the low-smoke non-halogen flame-retardant environment-friendly polyolefin material of low-k.

5. Low ESR photovoltaic system power cable according to claim 1 is characterized in that, described inner sheath and oversheath are the low-smoke non-halogen flame-retardant environment-friendly polyolefin material.