A high voltage power cable

Abstract

The invention relates to a high-voltage power cable. The high-voltage power cable comprises a cable core, an inner cross-linked polyethylene insulation layer, an insulation thermal conduction layer composed of cross-linked polyethylene and graphene thermal conduction powder, an outer cross-linked polyethylene insulation layer, a metal protective sleeve and an outer protective sleeve. The insulation structure of the high-voltage power cable is of a three-layer structure composed of the inner cross-linked polyethylene insulation layer, the insulation thermal conduction layer and the outer cross-linked polyethylene insulation layer, wherein the insulation thermal conduction layer located at the middle improve the thermal conduction performance of the whole insulation structure by 1.8 to 2.6 times; the insulation thermal conduction layer is firmly combined with the inner cross-linked polyethylene insulation layer or the outer cross-linked polyethylene insulation layer, so that delamination and the breakdown of the insulation thermal conduction layer can be avoided. The high-voltage power cable has the advantages of excellent heat resistance and excellent heat dissipation effect, and can be applied to high-temperature environments of 120 to 95 DEG C for a long time.

Description

technical field [0001] The invention relates to a high-voltage power cable and belongs to the technical field of cables. Background technique [0002] Cables are wire products used to transmit electric (magnetic) energy, information and realize electromagnetic energy conversion, which can be defined as: a collection of the following parts; one or more insulated cores, and their respective possible coatings Layer, overall protective layer and outer sheath, the cable may also have additional uninsulated conductors. Wire products used to transmit electric (magnetic) energy, information and realize electromagnetic energy conversion. [0003] The main characteristics of power cables are: extruding (winding) the insulating layer outside the conductor, such as overhead insulated cables, or twisting several cores (corresponding to the phase wire, neutral wire and ground wire of the power system), such as overhead insulated cables with more than two cores , or add a sheath layer, s...

AI Technical Summary

Problems solved by technology

[0005] Some existing high-voltage power cables are often exposed to work in high-temperature and harsh areas where the ambient temperature is higher than 25°C for a long time. However, due to the high-voltage resistance requirements of high-voltage power cables, the thermal conductivity of the insulation part and the outer protection part of the cable is limited. The purpose of rapid heat dissipation cannot be achieved. When the wire core works at 90°C for a long time, the load of the cross-linked cable increases, the temperature of the wire core rises, and the cable expands when heated. It is easy to age and delaminate between the insulation part and the outer protection part, and even cable breakdown may occur in severe cases

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