A kind of insulated high-voltage cable and its preparation method

Abstract

The present invention relates to the field of cable technology, in particular to an insulated high-voltage cable and a preparation method thereof. In the insulated high-voltage cable of the present invention, the interior of the insulated high-voltage cable includes a conductive core, and the conductive core includes one or more conductors. The conductive core is wrapped with an insulating shielding layer, and the insulating shielding layer includes the following raw materials in parts by weight: 70-75 parts of maleic anhydride grafted polypropylene, 1-2 parts of vulcanized silicone rubber, and 15-25 parts of modified masterbatches , 2-4 parts of wollastonite, 1-5 parts of magnesium oxide, 1-2 parts of flame retardant FR-302C, 0.5-1 part of compatibilizer, 0.5-0.8 parts of antioxidant 1010, and 0.1-0.5 parts of lubricant. In the insulating high-voltage cable prepared by the invention, the material of the insulating shielding layer is more convenient for recycling, more green and environmentally friendly, and the service life of the insulating shielding layer is longer.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to an insulated high-voltage cable and a preparation method thereof. Background technique [0002] The development of electric energy is related to the national economy, the people's livelihood and national security. With the continuous and rapid development of my country's economy and society, the demand for electricity has also entered a period of rapid growth. Requirements require the development of UHV, long-distance, large-capacity, and low-loss power networks to facilitate national development planning. HVDC transmission technology is an effective way to solve this problem. [0003] High-voltage cables are the most important part of high-voltage direct current transmission technology. According to different types of insulation, they can be divided into three types: viscous impregnated paper type, oil-filled type and extruded type cables. The first two types are safe and reliable...

AI Technical Summary

Problems solved by technology

[0003] High-voltage cables are the most important part of high-voltage direct current transmission technology. According to different types of insulation, they can be divided into three types: viscous impregnated paper type, oil-filled type and extruded type cables. The first two types are safe and reliable in operation. Early high-voltage direct current cables were widely used in power transmission projects, but there were problems such as complex installation process, limited line length and insufficient operating temperature, while extruded cables use polymer materials as insulating media, because they have good electrical, It has been rapidly promoted due to its mechanical and thermal properties, among which XLPE high-voltage cables have outstanding performance and are the most widely used

[0004] However, with the increase in the use of XLPE high-voltage cables, the manufacturing cost of XLPE high-voltage cables is high, the efficiency is low, and it is difficult to recycle and reuse after reaching the service life. Incineration treatment not only pollutes the environment but also wastes resources. It has gradually become prominent, especially in the context of the major theme of environmental protection, the study of green and recyclable high-voltage cables is a major key issue that must be solved