High-voltage cable stabilizer and preparation method thereof

Abstract

The invention discloses a high-voltage cable stabilizer and a preparation method thereof. A vinyl aromatic ketone compound and inorganic nanoparticles are subjected to a coupling reaction to prepare inorganic nanoparticles modified by a coated silane coupling agent and a grafted voltage stabilizer vinyl aromatic ketone compound, and the voltage stabilizer is used as a surface modifier and interacts with the modified nanoparticles through Van der Waals' force or chemical bonds. The dispersion of the nanoparticles is enhanced, the migration and precipitation of the voltage stabilizer are inhibited, the synergistic effect of the voltage stabilizer and the nanoparticles is obtained, the breakdown characteristic, the conductivity characteristic and the space charge characteristic of the polymerinsulating material are improved, and the capacity of the polymer insulating material for inhibiting electric branches and water branches is enhanced.

Description

technical field [0001] The invention relates to the technical field of high-voltage cable stabilizers, in particular to a high-voltage cable stabilizer and a preparation method thereof. Background technique [0002] As a key component of power transmission, power cables play an irreplaceable role in many occasions. At present, the highest voltage level of the cross-linked polyethylene insulated high-voltage AC power cables that have been put into operation in my country has reached 500k V. Although the research and development of insulated high-voltage DC power cables started relatively late, they have also completed the triple jump of the voltage level and reached ± 320kV. Although this voltage level has reached the world's advanced level, it still cannot meet the needs of my country's economic development. In order to improve the transmission efficiency of electric energy, it is necessary to further increase the working voltage level of power cables. [0003] Usually, in ...

AI Technical Summary

Problems solved by technology

Limited by the inherent characteristics of the manufacturing materials, the electrical resistance of cable insulation materials is limited. Especially under high electric fields, two typical irreversible electrical damage phenomena, electrical treeing and breakdown, will occur in the insulating materials, which are serious It threatens the stable operation of the cable and limits the increase of the voltage level of the power cable

Therefore, the existing methods of simply increasing the insulation thickness of the power cable material, or continuously reducing the size and number of defects in the insulation material, have been unable to meet the high voltage resistance requirements of the cable.