Method for testing surface pollution pressure resistance of insulator coated with anti-pollution flashover coating

Abstract

The invention provides a method for testing the surface pollution pressure resistance of an insulator coated with an anti-pollution flashover coating. The nozzle is used for uniformly and dispersedlyspraying solid powdery dirt into the dirt accumulation environment box by utilizing negative pressure generated by compressed air; solid powdery dirt is adsorbed to the outer surface of the anti-pollution flashover coating by utilizing the adsorption effect of high-voltage direct current; in order to ensure that the dirt amount on the outer surface of the anti-pollution flashover coating is uniform, the polarity of the high-voltage direct current is changed once on the high-voltage side at certain intervals, the polarity is frequently changed, and the problems that the surface of the hydrophobic and super-hydrophobic anti-pollution flashover coating with low surface energy is difficult to contaminate and even cannot be contaminated are solved; solid powdery dirt is prepared by adopting a method of firstly wet-mixing uniformly and then dehydrating and drying, so that the dirt is finer and smoother, and the dirt can be conveniently sprayed out in a mist form; the solid powdery dirt is prefabricated and formed by drying and dewatering in advance, so that the time required for drying the dirt liquid in the traditional test method is avoided; and the pretreatment step of coating the diatomite in the traditional method is abandoned.

Description

technical field [0001] The invention relates to the field of electrical insulation performance test research of an external insulation anti-pollution flashover paint, in particular to a method for testing the surface pollution withstand voltage performance of an insulator coated with an anti-pollution flashover paint. Background technique [0002] Room Temperature Vulcanized Silicone Rubber (RTV) has excellent hydrophobicity and hydrophobic mobility, which can significantly improve the pollution flashover voltage of insulators, and is widely used in power systems in my country. [0003] However, with the development of EHV and UHV, the voltage level of the power system is constantly increasing, which puts forward higher requirements for the anti-pollution flashover ability of insulators. Experts and scholars at home and abroad have begun to study a new type of super-hydrophobic anti-fouling flashover coating. The surface of this anti-fouling flashover coating has good super-...

AI Technical Summary

Problems solved by technology

However, the pollution methods of solid layer method include pouring method, spraying method, dipping method and quantitative brushing method, the pollution efficiency is low, and it is not easy to paint evenly, especially in the hydrophobic and super hydrophobic Coated surfaces are difficult or impossible to stain, making testing impossible

And if the solid layer method uses dirty liquid for contamination, it will take a certain amount of time to dry the dirty liquid, prolonging the test progress.

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