Contamination ageing test method for silicon rubber insulator

Abstract

The invention provides a contamination ageing test method for a silicon rubber insulator. The contamination ageing test method comprises the following steps: firstly, cutting a silicone rubber insulator string to obtain silicone rubber insulator sheets; sampling deposited ash of a to-be-detected region to obtain a dust haze sample; then mixing the dust haze sample obtained in the previous step with water to obtain a dust haze contamination solution, and carrying out manual contamination treatment on the silicone rubber insulator sheets by adopting the dust haze contamination solution to obtain to-be-detected silicone rubber insulator sheets; finally, carrying out aging test on the silicone rubber insulator sheets obtained in the previous step, and calculating to obtain a simulated aging state of the silicon rubber insulator. According to the contamination ageing test method provided by the invention, an aging effect of various complex haze environments on silicon rubber materials can be highly fitted, the experiment difficulty is simplified, the experiment cost is reduced, and the experiment time is shortened; the contamination ageing test method has an important guidance significance and economic values.

Description

technical field [0001] The invention belongs to the technical field of power system operation and maintenance, and in particular relates to a pollution aging test method for silicone rubber insulators, in particular to a pollution aging test method for silicon rubber insulators simulating actual complex fog and haze environments. Background technique [0002] Transmission line insulators are exposed to the outdoors for a long time. Due to factors such as natural ash fall and industrial pollution, dirt will adhere to the surface and form a dirty layer. In an environment with high humidity, the dirty layer will absorb moisture and get damp, so that the soluble electrolyte in the dirty layer will dissolve, the dirty layer will start to conduct electricity, and a certain magnitude of leakage current will flow on the surface of the dirty insulator, which will gradually develop into partial discharge. When the arc develops and runs through the upper and lower electrodes of the ins...

AI Technical Summary

Problems solved by technology

Moreover, the coexistence of a large amount of pollution and humidity accompanied by the erosion of ultraviolet rays, high temperature, ozone, acid rain, etc. is also the main factor leading to the aging of the surface of insulator materials, resulting in more corona discharges, surface discharges, and even breakdown phenomena.

In addition, the reduction of insulation will cause many new failures of the external insulation of electrical equipment, affecting the safe and reliable operation of the entire power system, especially the complex smog pollution, which increases the probability of pollution flashover accidents in heavily polluted areas of smog

[0004] Therefore, timely detection of outdoor silicone rubber insulator strings, especially in heavily polluted haze areas, to ensure its reliable operation, maintenance and timely replacement, is crucial to the reliable operation of the power grid. The artificial accelerated aging test method of silicone rubber has been reported For example, although the 1000h salt spray method and the 5000h aging test method are different, they are basically concentrated in the discharge haze device, and the aging conditions in the test are limited.

If you want to simulate the aging of insulator strings in complex fog and haze environments (such as salt spray, ultraviolet rays, ozone, high humidity, high temperature / low temperature, and acid gas, etc.), it is necessary to conduct multiple sets of experiments with different condition settings, not only the internal configuration of all devices Unable to meet the collaborative simulation of real complex haze environments (such as natural and industrial aging pollution such as flying dust, saline-alkali, sea water, ozone, sun exposure, rain, severe cold, and intense heat), the time-consuming will reach tens of thousands of hours or more

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