A method for early warning of insulator flashover risk

Abstract

The invention discloses an insulator flashover early warning method comprising the following steps of: (1) acquiring an air salinity value; (2) determining a salt mist grade according to the salinity value acquired in the step (1); (3) acquiring the salt density value and the ash density value of the surface of the insulator; (4) determining the pollution grade of the insulator according to the salt density value and the ash density value acquired in the step (3); (5) determining a dirt wet grade according to the salt mist grade acquired in the step (2) and the pollution grade acquired in the step (4); and (6) giving an insulator flashover alarm when the dirt wet grade exceeds a preset threshold. The insulator flashover early warning method solves a problem that the pollution grade of a coastal power grid ranked according to the pollution of the surface of the insulator just has limited effect on power grid flashover guidance, and ranks the pollution grade according to the surface pollution of the insulator and the air salt mist grade in order to evaluate the influence of the surface pollution of the insulator and the sea salt mist on external insulation, and further determine an external insulation configuration case and a pollution flashover preventing measure usage case according to the dirt wet grade.

Description

technical field [0001] The invention belongs to the technical field of power grid safety, and more specifically relates to an insulator flashover early warning method. Background technique [0002] With the development of industry and agriculture in coastal areas, the pollution deposited on the surface of insulators can easily cause pollution flashover in the coastal salt spray environment. According to statistics, the total number of pollution flashover accidents is second only to lightning flashover, and the losses caused are far greater than lightning strikes. Therefore, it is necessary to prevent pollution flashover of insulators and enhance the stability of power grid operation through pollution warning. [0003] The traditional pollution flashover prevention strategy mainly adopts the method of regular cleaning every year. Although this method can effectively reduce the pollution on the surface of insulators, it is blind to a certain extent, and cannot carry out targ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides an insulator flashover early warning method, the purpose of which is to give an early warning to the insulator flashover while considering the influence of the insulator surface pollution and air salt spray degree, thereby solving the current problem. Some insulator flashover early warning methods are not applicable and the technical problems that have a greater impact on the degree of salt spray in coastal areas

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