CN111933335A - Medium-high voltage cable for smart power grid and preparation method thereof - Google Patents
Medium-high voltage cable for smart power grid and preparation method thereof Download PDFInfo
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- CN111933335A CN111933335A CN202010771212.5A CN202010771212A CN111933335A CN 111933335 A CN111933335 A CN 111933335A CN 202010771212 A CN202010771212 A CN 202010771212A CN 111933335 A CN111933335 A CN 111933335A
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- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0225—Three or more layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
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- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/187—Sheaths comprising extruded non-metallic layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/22—Metal wires or tapes, e.g. made of steel
- H01B7/226—Helicoidally wound metal wires or tapes
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks
- H01B7/324—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks comprising temperature sensing means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
- H01B9/021—Features relating to screening tape per se
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
- H01B9/022—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of longitudinal lapped tape-conductors
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Abstract
The invention discloses a medium-high voltage cable for a smart grid and a preparation method thereof, and relates to the technical field of power cables, in the structure of a composite shielding layer, an annealed soft copper strip can effectively ground and protect a wire core to normally operate for a long time, a graphene coating semi-conductive strip has excellent discharge effect under the condition of auxiliary shielding of heat energy and can play a role in secondary protection of the wire core, a micro collector is arranged in a fixed distance outside the graphene coating semi-conductive strip, after the cable fails, two micro collectors at the head and the tail of a failure section can instantly emit high-frequency electromagnetic waves, the failure point can be quickly and accurately positioned through a partial discharge device, so that the cable is overhauled in time, the whole body formed by combining an inner lining layer, an armor layer and an outer protective layer has excellent physical and mechanical properties, and the whole cable is not easily scratched or scratched under the severe environments of outdoor and field direct-buried, faster laying work and later maintenance work can be realized.
Description
Technical Field
The invention relates to the technical field of power cables, in particular to a medium-high voltage cable for a smart grid and a preparation method thereof.
Background
With the increasing demand and expectation of earth resources, new energy, green resource utilization, energy reasonable utilization and the like are widely concerned by the nation, the issue of the smart grid is also brought forward, and the technical support of wires and cables is necessary in each link of power generation, power transformation, power transmission, power utilization and configuration of the power grid; the medium-high voltage cable generally refers to a power cable mainly used for power transformation and transmission with the alternating voltage of more than 6kV and less than 35kV, the implementation and application of the intelligent power grid in China do not depart from the medium-high voltage cable technology, the medium-high voltage cable used by the domestic power grid at present is slightly influenced by weather and external environment, the medium-high voltage cable is beneficial to personal safety after being laid and normally used, and the operation and maintenance work in the later period are simple and convenient; is beneficial to city planning. However, once the domestic power grid construction cable has operation problems, the outage time and the overhaul period are long, the regional power utilization is affected, and certain economic loss and power utilization inconvenience are caused.
Disclosure of Invention
The invention aims to solve the technical problems that once the operation problem of the domestic power grid construction cable occurs, the outage time and the overhaul period are long, the regional power utilization is influenced, and certain economic loss and power utilization inconvenience are caused.
In order to solve the technical problems, the invention provides a medium-high voltage cable for a smart grid, which comprises a cable core and three wire cores sequentially arranged in the cable core along the circumferential direction of the cable core, wherein two adjacent wire cores are mutually abutted, and polypropylene filling is filled between the wire cores and the cable core; the cable core comprises a compressed round copper conductor, an insulating layer and a composite shielding layer which are sequentially arranged from inside to outside, a plurality of micro collectors are arranged at equal intervals along the length direction of the composite shielding layer, when the cable breaks down, the micro collectors closest to the head and the tail of the fault section send high-frequency electromagnetic waves, and collector binding belts for fixing the micro collectors are bound outside the composite shielding layer; the cable core includes light-duty non-woven fabrics, inner liner, armor and the outer jacket that sets gradually from inside to outside.
The technical effects are as follows: in the structure of compound shielding layer, the operation that annealing soft copper strips can effective ground protection sinle silk normal for a long time, graphite alkene coating semi-conductive area has fabulous effect of discharging still under the supplementary condition of shielding heat energy, can play the secondary protection to the sinle silk, in the fixed distance outside the graphite alkene coating semi-conductive area, miniature collector is equipped with, after the cable breaks down, high frequency electromagnetic wave can be sent in the twinkling of an eye to two miniature collectors of trouble section head and the tail, can fix a position the fault point fast accurately through the partial discharge equipment, thereby in time overhaul, the inner liner, the whole that armor and outer jacket make up has fabulous physical mechanical properties, outdoor, under adverse circumstances such as open-air direct-burried soil and gravel, the cable is whole to be difficult to by fish tail and cut, can realize faster laying work and later maintenance work.
The technical scheme of the invention is further defined as follows:
furthermore, the insulating layer comprises a semiconductive inner shielding layer, a crosslinked polyethylene layer and a semiconductive outer shielding layer which are sequentially arranged from inside to outside.
The middle-high voltage cable for the smart power grid, the semi-conductive inner shielding layer and the semi-conductive outer shielding layer are both made of EVA and conductive carbon black in a mixed mode.
The composite shielding layer of the medium-high voltage cable for the smart power grid comprises an annealed soft copper strip and a graphene coating semi-conducting strip which are sequentially arranged from inside to outside.
The middle-high voltage cable for the smart grid, the micro collector comprises
The temperature detection device detects the temperature of the cable in real time and sends a high-temperature signal when the temperature exceeds a preset temperature threshold;
the current detection device detects the current in real time and sends out a large-current signal when the current exceeds a preset current threshold;
and the Bluetooth switch is turned on in response to the high-temperature signal or the large-current signal.
The smart power grids in medium and high voltage cable, inner liner and outer jacket all set up to be made by PVC, the armor sets up to the two-layer galvanized steel band of radial setting.
The invention also aims to provide a preparation method of the medium-high voltage cable for the smart grid, which comprises the following steps:
s1, stranding the annealed soft copper wires and pressing to obtain a pressed round copper conductor;
s2, sequentially extruding materials of the semiconductive inner shielding layer, the crosslinked polyethylene layer and the semiconductive outer shielding layer in a three-layer co-extrusion mode, and accordingly forming an insulating layer outside the compressed round copper conductor;
s3, lapping a layer of annealed soft copper tape outside the insulating layer in an overlapping mode, and then lapping a layer of graphene coating semi-conductive tape outside the annealed soft copper tape in an overlapping mode, so that a composite shielding layer is formed outside the insulating layer;
s4, arranging a plurality of micro collectors outside the composite shielding layer at equal intervals along the length direction of the composite shielding layer, coating a layer of collector binding belt outside the composite shielding layer, and fixing all the micro collectors to form a complete wire core;
s5, cabling the three wire cores, filling the cable cores with polypropylene, and after filling, lapping the whole cable cores by using light non-woven fabric;
s6, extruding a PVC material outside the light non-woven fabric to form an inner liner layer;
s7, wrapping two layers of galvanized steel strips outside the lining layer in a gap wrapping mode to form an armor layer;
s8, extruding PVC material outside the armor layer to form an outer protective layer, and meanwhile, completing the preparation of the whole cable.
In the aforementioned method for manufacturing a medium/high voltage cable for a smart grid, in step S3, the resistivity of the annealed soft copper tape is set to be not more than 0.0178 Ω (mm)2And/m, the thickness of the graphene-coated semi-conductive belt is set to be 0.08-0.20 mm.
In the aforementioned method for manufacturing the medium-high voltage cable for the smart grid, in step S4, the thickness of the micro collector is set to 1mm, and the length and the width are both set to 5 mm.
The invention has the beneficial effects that:
(1) in the invention, the net-shaped three-dimensional structure of the crosslinked polyethylene enables the whole insulating layer to have very excellent heat resistance, and a new chemical bond is established between macromolecules, so that the hardness, the rigidity, the wear resistance and the impact resistance of the whole insulating layer are improved, the crosslinked polyethylene keeps the original good insulating property of the polyethylene, the insulating resistance is further increased, the influence of temperature is small, and the insulating layer is formed by a three-layer co-extrusion mode, so the insulating layer has the advantages of compactness and high roundness;
(2) according to the invention, the thickness of the whole wire core is more uniform due to the arrangement of the inner liner layer, the outer surface of the wire core is more round, the armor layer is provided with two layers of galvanized steel strips, and the wrapping mode is set to be gap wrapping, so that the whole cable can be free from the influence of external force as much as possible during laying operation, thereby ensuring normal electrification, and the arrangement of the outer protective layer further enhances the environment-friendly flame retardant property of the whole cable and has certain insect and rat prevention properties;
(3) according to the invention, the miniature collector has the advantages of small volume and light weight, and can be better attached to the outside of the composite shielding layer while ensuring a stable collection function, so that the miniature collector can be better fixed, and the normal use of the whole cable can not be influenced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of a core of the present invention.
Wherein: 100. a cable core; 110. light non-woven fabric; 120. an inner liner layer; 130. an armor layer; 140. an outer jacket; 200. a wire core; 210. pressing the round copper conductor; 220. an insulating layer; 221. a semiconductive inner shield layer; 222. a crosslinked polyethylene layer; 223. a semiconductive outer shield layer; 230. a composite shielding layer; 231. annealing the soft copper strip; 232. a graphene-coated semiconducting tape; 240. a micro collector; 250. the collector is wrapped with a band; 300. and (4) filling polypropylene.
Detailed Description
The middle-high voltage cable for the smart power grid provided by the embodiment has the structure as shown in fig. 1 to fig. 2, and comprises a cable core 100, wherein three wire cores 200 are sequentially arranged in the cable core 100 along the circumferential direction of the cable core, the two adjacent wire cores 200 are mutually abutted, and polypropylene filler 300 is filled between the wire cores 200 and the cable core 100.
The wire core 200 comprises a compressed round copper conductor 210, an insulating layer 220 and a composite shielding layer 230 which are sequentially arranged from inside to outside, wherein the insulating layer 220 comprises a semi-conductive inner shielding layer 221, a cross-linked polyethylene layer 222 and a semi-conductive outer shielding layer 223 which are sequentially arranged from inside to outside, and the semi-conductive inner shielding layer 221 and the semi-conductive outer shielding layer 223 are both prepared by mixing EVA and conductive carbon black; the composite shielding layer comprises an annealed soft copper strip 231 and a graphene coating semi-conductive strip 232 which are sequentially arranged from inside to outside.
A plurality of micro collectors 240 are arranged outside the composite shielding layer 230, all the micro collectors 240 are arranged at equal intervals along the length direction of the composite shielding layer 230, when a cable fails, the micro collector 240 closest to the end of the failed section sends out high-frequency electromagnetic waves, and a collector binding belt 250 is bound outside the composite shielding layer 230 and used for fixing all the micro collectors 240.
The miniature collector comprises a temperature detection device, a current detection device and a Bluetooth switch. The temperature detection device is preset with a temperature threshold value, detects the temperature of the cable in real time and sends out a high-temperature signal when the temperature exceeds the temperature threshold value; the current detection device is preset with a current threshold value, detects the current in real time and sends out a large-current signal when the current exceeds the current threshold value; the Bluetooth switch responds to a high-temperature signal or a large-current signal to turn on the Bluetooth switch and sends out a Bluetooth signal all the time, and the matched partial discharge equipment can receive the Bluetooth signal and give a prompt.
The cable core 100 comprises a light non-woven fabric 110, an inner liner 120, an armor layer 130 and an outer protective layer 140 which are sequentially arranged from inside to outside, wherein the inner liner 120 and the outer protective layer 140 are both made of PVC, and the armor layer 130 is arranged into two layers of galvanized steel strips which are radially arranged.
The preparation method of the medium-high voltage cable for the smart grid comprises the following steps:
s1, stranding the annealed soft copper wires and pressing to obtain a pressed round copper conductor 210;
s2, sequentially extruding the materials of the semiconductive inner shielding layer 221, the crosslinked polyethylene layer 222 and the semiconductive outer shielding layer 223 in a three-layer co-extrusion mode, and forming the insulating layer 220 outside the tightly pressed round copper conductor 210;
s3, wrapping a layer of annealed soft copper strip 231 outside the insulating layer 220 in an overlapping manner, wherein the resistivity of the annealed soft copper strip 231 is set to be 0.0178 omega (mm)2A graphene coating semi-conductive belt 232 is lapped and wrapped outside the annealed soft copper belt 231 in an overlapping mode, and the thickness of the graphene coating semi-conductive belt 232 is set to be 0.14mm, so that a composite shielding layer 230 is formed outside the insulating layer 220;
s4, arranging a plurality of micro collectors 240 outside the composite shielding layer 230 at equal intervals along the length direction of the composite shielding layer, wrapping a layer of collector binding belt 250 outside the composite shielding layer 230, and fixing all the micro collectors 240 to form a complete wire core 200;
s5, cabling the three wire cores 200, filling the cable cores with polypropylene filling 300, and after filling, overlapping and wrapping the whole body with light non-woven fabric 110;
s6, extruding a PVC material out of the light non-woven fabric 110 to form an inner liner 120;
s7, wrapping two layers of galvanized steel strips outside the lining layer 120 in a gap wrapping mode to form an armor layer 130;
s8, extruding PVC material out of the armor layer 130 to form the outer sheath 140, and completing the preparation of the whole cable.
Because the reticular three-dimensional structure of the crosslinked polyethylene enables the whole insulating layer 220 to have excellent heat resistance, and a new chemical bond is established between macromolecules, the hardness, the rigidity, the wear resistance and the shock resistance of the whole insulating layer 220 are improved, the crosslinked polyethylene maintains the original good insulating property of the polyethylene, the insulating resistance is further increased, the influence of temperature is small, and the insulating layer 220 is formed by a three-layer co-extrusion mode, so the insulating layer has the advantages of compactness and high roundness.
The setting of inner liner 120 makes the holistic thickness of sinle silk 200 more even, also makes the surface of self more round simultaneously, and armor 130 sets up to two-layer galvanized steel band, and sets up to the clearance around the package mode and wrap, makes whole cable can not receive external force influence as far as when laying the operation, thereby has guaranteed normal circular telegram, the environmental protection flame retardant property of whole cable has then further been strengthened in the setting of outer jacket 140, also has certain protection against insects protection against rodents performance simultaneously.
In the structure of the composite shielding layer 230, the annealed soft copper strip 231 can effectively ground and protect the wire core 200 from long-term normal operation, the graphene coated semi-conductive strip 232 has excellent discharging effect under the condition of auxiliary shielding heat energy and can play a role in secondary protection of the wire core 200, the miniature collector 240 is arranged in a fixed distance outside the graphene coated semi-conductive strip 232, after a cable fails, abnormal high temperature and large current can be generated at the damaged part, the miniature collector 240 monitors the cable and the miniature collector in real time, the two miniature collectors 240 at the head and the tail of a fault section can instantly send out Bluetooth signals, the Bluetooth signals can be received through matched partial discharge equipment, so that the fault point can be quickly and accurately positioned and timely overhauled, the whole body formed by combining the inner liner 120, the armor layer 130 and the outer protective layer 140 has excellent physical and mechanical properties, and under the harsh environments of outdoor and field direct-buried soil, gravel and the like, the cable is not easy to scratch and cut, and quick laying work and later maintenance work can be realized.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (9)
1. The utility model provides a well high voltage cable for smart power grids which characterized in that: the cable comprises a cable core (100) and three wire cores (200) which are sequentially arranged in the cable core (100) along the circumferential direction, two adjacent wire cores (200) are mutually butted, and polypropylene filling (300) is filled between each wire core (200) and the cable core (100); the cable core (200) comprises a compressed round copper conductor (210), an insulating layer (220) and a composite shielding layer (230) which are sequentially arranged from inside to outside, a plurality of micro collectors (240) are arranged outside the composite shielding layer (230) at equal intervals along the length direction of the composite shielding layer, when a cable breaks down, the micro collectors (240) closest to the head and the tail of the fault section emit high-frequency electromagnetic waves, and collector binding belts (250) used for fixing the micro collectors (240) are bound outside the composite shielding layer (230); the cable core (100) comprises a light non-woven fabric (110), an inner liner (120), an armor layer (130) and an outer protective layer (140) which are sequentially arranged from inside to outside.
2. The medium-high voltage cable for the smart grid according to claim 1, wherein: the insulating layer (220) comprises a semi-conductive inner shielding layer (221), a cross-linked polyethylene layer (222) and a semi-conductive outer shielding layer (223) which are sequentially arranged from inside to outside.
3. The medium-high voltage cable for the smart grid according to claim 2, wherein: the semi-conductive inner shielding layer (221) and the semi-conductive outer shielding layer (223) are both made of EVA and conductive carbon black in a mixing mode.
4. The medium-high voltage cable for the smart grid according to claim 1, wherein: the composite shielding layer comprises an annealed soft copper strip (231) and a graphene coating semi-conductive strip (232) which are sequentially arranged from inside to outside.
5. The medium-high voltage cable for the smart grid according to claim 1, wherein: the micro collector (240) comprises
The temperature detection device detects the temperature of the cable in real time and sends a high-temperature signal when the temperature exceeds a preset temperature threshold;
the current detection device detects the current in real time and sends out a large-current signal when the current exceeds a preset current threshold;
and the Bluetooth switch is turned on in response to the high-temperature signal or the large-current signal and sends out a Bluetooth signal.
6. The medium-high voltage cable for the smart grid according to claim 1, wherein: the inner liner (120) and the outer protective layer (140) are both made of PVC, and the armor layer (130) is arranged into two layers of galvanized steel strips which are arranged in the radial direction.
7. The preparation method of the medium-high voltage cable for the smart grid according to claim 1 is characterized by comprising the following steps: the method comprises the following steps:
s1, stranding the annealed soft copper wires and pressing to obtain a pressed round copper conductor (210);
s2, sequentially extruding materials of the semiconductive inner shielding layer (221), the cross-linked polyethylene layer (222) and the semiconductive outer shielding layer (223) in a three-layer co-extrusion mode, and forming an insulating layer (220) outside the compressed round copper conductor (210);
s3, overlapping and wrapping a layer of annealed soft copper belt (231) outside the insulating layer (220), and overlapping and wrapping a layer of graphene coating semi-conductive belt (232) outside the annealed soft copper belt (231), so that a composite shielding layer (230) is formed outside the insulating layer (220);
s4, arranging a plurality of micro collectors (240) outside the composite shielding layer (230) at equal intervals along the length direction of the composite shielding layer, wrapping a layer of collector bundling belt (250) outside the composite shielding layer (230), and fixing all the micro collectors (240) to form a complete wire core (200);
s5, cabling the three wire cores (200), filling the cable cores with polypropylene filling (300), and after filling, overlapping and wrapping the whole body with light non-woven fabric (110);
s6, extruding a PVC material outside the light non-woven fabric (110) to form an inner lining layer (120);
s7, wrapping two layers of galvanized steel strips outside the lining layer (120) in a gap wrapping mode to form an armor layer (130);
and S8, extruding PVC material outside the armor layer (130) to form an outer protective layer (140), and simultaneously completing the preparation of the whole cable.
8. The preparation method of the medium-high voltage cable for the smart grid according to claim 7, characterized by comprising the following steps: in the step S3, the resistivity of the annealed soft copper strip (231) is set to be not more than 0.0178 Ω (mm)2And/m, the thickness of the graphene-coated semiconducting tape (232) is set to be 0.08-0.20 mm.
9. The preparation method of the medium-high voltage cable for the smart grid according to claim 7, characterized by comprising the following steps: in the step S4, the thickness of the micro-collector (240) is set to 1mm, and the length and the width are both set to 5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010771212.5A CN111933335A (en) | 2020-08-03 | 2020-08-03 | Medium-high voltage cable for smart power grid and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010771212.5A CN111933335A (en) | 2020-08-03 | 2020-08-03 | Medium-high voltage cable for smart power grid and preparation method thereof |
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| CN111933335A true CN111933335A (en) | 2020-11-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114255922A (en) * | 2021-12-08 | 2022-03-29 | 国网山东省电力公司威海供电公司 | Composite cable integrating partial discharge measurement, temperature measurement and excavation and breaking measurement |
-
2020
- 2020-08-03 CN CN202010771212.5A patent/CN111933335A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114255922A (en) * | 2021-12-08 | 2022-03-29 | 国网山东省电力公司威海供电公司 | Composite cable integrating partial discharge measurement, temperature measurement and excavation and breaking measurement |
| CN114255922B (en) * | 2021-12-08 | 2023-10-03 | 国网山东省电力公司威海供电公司 | Composite cable integrating partial discharge, temperature measurement and cutting |
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