Anti-pollution-flashover insulator

Abstract

The invention discloses an anti-pollution-flashover insulator, which comprises an insulator main-body and a coating applied on the surface of the main body. The coating is a nano-fluorocarbon coating, which comprises the following ingredients (by weight): 5-10% of nano-silica, 5-10% of a cross-linking agent, 8-14% of an organometallic compound and the rest of fluorocarbon coating. The inner and outer surfaces of the anti-pollution-flashover insulator are fully covered with the nano-fluorocarbon coating. As the nano-fluorocarbon coating has good film-forming property, strong covering power and hardness and firm and reliable bond property, the anti-pollution-flashover insulator is endowed with excellent hydrophobic property, mechanical property, resistance to soiling and ice melting performance. By the use of the anti-pollution-flashover insulator, probability of pollution flashover is remarkably reduced, and safe operation of power network is guaranteed.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to an anti-pollution flashover insulator. Background technique [0002] The function of the insulator is to support and fix the busbar and the live conductor, and to make a sufficient distance between the live conductors or between the conductor and the earth to achieve the purpose of insulation. As a special insulation control, insulators are crucial in overhead transmission lines. However, after a period of use, more or less dirt will adhere to the surface of the insulator. In a dry state, the resistance of these dirt layers becomes very large, the leakage current flowing through the dirt layer is small, and has no significant effect on the dielectric strength of the insulator; but in the case of being wet, the electrolyte in the dirt layer will dissolve , so that the surface conductance in the dirt layer increases, the leakage current increases, and then a local arc is ...

AI Technical Summary

Problems solved by technology

In a dry state, the resistance of these dirt layers becomes very large, the leakage current flowing through the dirt layer is small, and has no significant effect on the dielectric strength of the insulator; but in the case of being wet, the electrolyte in the dirt layer will dissolve , so that the surface conductance in the dirt layer increases, the leakage current increases, and then a local arc is generated. In severe cases, the insulator will even be broken down, that is, the phenomenon of pollution flashover will occur.

Pollution flashover is characterized by a long time, which generally cannot be eliminated by automatic closing, and the accident is easy to expand, resulting in large-scale power outages, and a long time for maintenance and recovery, which seriously affects the safe operation of the power system

[0003] At present, the measures to prevent insulator pollution flashover mainly include: artificial regular cleaning, increasing the creepage distance of insulators, and enhancing the hydrophobic performance of the insulator surface, etc.; the above measures cannot fundamentally solve the problem of dirt deposition, so researchers developed RTV coating (room temperature vulcanized silicone rubber) is applied on the surface of the insulator

However, the overall performance of RTV coatings is not ideal, and the service life is short, and it is easy to age. When the insulation performance of the insulator is reduced, it is still easy to cause major accidents under harsh conditions

Images