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Medium-high voltage cable for smart power grid and preparation method of medium-high voltage cable

A technology for medium and high voltage cables and smart grids, which is applied in the direction of power cables, cable/conductor manufacturing, and power cables with shielding layers/conductive layers, etc., which can solve the problems of power outage time and long maintenance period, power consumption in affected areas, and economic losses and other problems, to achieve good physical and mechanical properties, fast post-maintenance work, and uniform thickness

Pending Publication Date: 2020-11-13
YUANCHENG CABLE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that once there is an operation problem in the current domestic power grid construction cables, the power outage time and maintenance period will be longer, which will affect the electricity consumption in the area, and will cause certain economic losses and inconvenience in electricity use

Method used

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  • Medium-high voltage cable for smart power grid and preparation method of medium-high voltage cable
  • Medium-high voltage cable for smart power grid and preparation method of medium-high voltage cable

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Embodiment Construction

[0033] A medium and high voltage cable for a smart grid provided in this embodiment has a structure such as Figure 1 to Figure 2 As shown, including the cable core 100, three cores 200 are arranged in the cable core 100 in sequence along its own circumferential direction, and two adjacent cores 200 interfere with each other, and the space between the cores 200 and the cable core 100 is filled with polypropylene filler 300.

[0034] The wire core 200 includes a tightly pressed circular copper conductor 210, an insulating layer 220, and a composite shielding layer 230 arranged sequentially from the inside to the outside, and the insulating layer 220 includes a semi-conductive inner shielding layer 221, a cross-linked polyethylene layer 222 and a semiconductive outer shielding layer 223, wherein the semiconductive inner shielding layer 221 and the semiconducting outer shielding layer 223 are both made of a mixture of EVA and conductive carbon black; the composite shielding layer...

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Abstract

The invention discloses a medium-high voltage cable for a smart power grid and a preparation method of the medium-high voltage cable, and relates to the technical field of power cables. In the structure of a composite shielding layer, an annealed soft copper strip can be effectively grounded to protect the long-term normal operation of a wire core; a graphene coating semi-conductive band has an excellent discharge effect under the condition of assisting in shielding heat energy and can achieve secondary protection of the wire core; miniature collectors are installed within a fixed distance outside the graphene coating semi-conductive band; after failure of the cable, the two miniature collectors at the head and tail of the fault section can instantly emit high-frequency electromagnetic waves, and a fault point can be quickly and accurately positioned through partial discharge equipment, so that maintenance is conducted in time; an inner lining layer, an armor layer and an outer sheathlayer are combined to form a whole which has excellent physical and mechanical properties, the whole cable is not easy to scratch and damage when being directly buried in soil and gravel in the open air and field and other severe environments, and rapid laying work and later maintenance work can be realized.

Description

technical field [0001] The invention relates to the technical field of power cables, in particular to a medium and high voltage cable for a smart grid and a preparation method thereof. Background technique [0002] With more and more requirements and expectations for the earth's resources, new energy, green resource utilization and energy rational utilization have received extensive attention from the country, and the issue of smart grid has also been put on the agenda. All aspects of power transmission, power consumption and configuration must have the technical support of wire and cable; medium and high voltage cables generally refer to power cables with an AC voltage of 6kV or more and 35kV or less, which are mainly used for power transformation and transmission. The implementation and application of smart grids in my country are very important. It is inseparable from medium and high voltage cable technology. At present, medium and high voltage cables used in domestic power...

Claims

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Application Information

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IPC IPC(8): H01B7/02H01B7/18H01B7/22H01B7/29H01B3/44H01B7/295H01B7/32H01B9/02H01B13/00
CPCH01B3/44H01B7/0225H01B7/0275H01B7/187H01B7/1875H01B7/226H01B7/292H01B7/295H01B7/32H01B7/324H01B9/021H01B9/022H01B13/00
Inventor 储贤民蒋梓钰刘永光岳龙皎殷红仙
Owner YUANCHENG CABLE CO LTD
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