Novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV

Abstract

The invention discloses a novel cross-linked-polyethylene insulated power cable with nominal voltage of 750kV, belongs to the technical field of power cables, and aims to solve the problem that existing high-voltage-class insulated power cables do not adapt to high-voltage power transmission with nominal voltage of 750kV. The novel cross-linked-polyethylene insulated power cable is produced by a method including connectively wrapping a semiconductive nylon tape around a conduct cable core, covering the semiconductive nylon tape with an inner super-smooth semiconductive shielding layer, covering the inner super-smooth semiconductive shielding layer with a super-purified cross-linked-polyethylene insulating layer and an outer super-smooth semiconductive shielding layer, connectively wrapping a semiconductive water-blocking tape around the outer super-smooth semiconductive shielding layer, covering the semiconductive water-blocking tape with a copper-wire fiber blended cloth layer, connectively wrapping a wrinkled metal sheath around the copper-wire fiber blended cloth layer, sequentially covering the wrinkled metal sheath with a cable asphalt layer and an insulated polyvinyl chloride outer sheath, and coating the outer surface of the insulated polyvinyl chloride outer sheath with a graphitic layer. The novel cross-linked-polyethylene insulated power cable is reasonable in structural design and suitable for serving as power cables with the nominal voltage ranging from 500kV to 750kV and the like.

Description

technical field [0001] The invention belongs to the technical field of power cables, and relates to a high-voltage insulated power cable used for transmitting and distributing high-power electric energy in a main line of a power system. Background technique [0002] With the increasing development of the power industry and the continuous improvement of industrial and agricultural production technology, the demand for high-voltage level, large-section, and large-capacity transmission cables for transmission and distribution of high-power electric energy is gradually increasing, so the technical requirements for power cables are also increasing. Higher and higher. In the known technology, the existing high-voltage level insulated power cables are mainly composed of copper wires or aluminum wires twisted into conductors, which are sequentially coated with conductor shielding layers, cross-linked polyethylene insulation layers, and buffer water-blocking tapes. , Corrugated meta...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the existing technology and solve the problem that the existing high-voltage insulated power cables are not suitable for rated voltage 750kV high-voltage power transmission operations

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