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

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...

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

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