Method for measuring equivalent salt density and ash density of cluster parachute surface of composite insulator

Abstract

The invention discloses a method for measuring the equivalent salt density and the ash density of a cluster parachute surface of a composite insulator. The method is characterized by comprising the following steps of: cleaning a foul layer on the cluster parachute surface by distilled water serving as a cleaning solution, and respectively measuring the equivalent salt density ESDD1 and the ash density NSDD1 of sewage obtained by cleaning by the distilled water; then cleaning a stubborn foul layer on the cluster parachute surface by an organic solvent serving as a cleaning solution, and respectively measuring the equivalent salt density ESDD2 and the ash density NSDD2 of sewage obtained by cleaning by the organic solvent; and taking sums of the twice measured results as the equivalent salt density and the ash density of the cluster parachute surface of the composite insulator. According to the method, the measured result can accurately represent the actual sewage accumulation condition of the surface of the composite insulator; accurate reference data are supplied to analysis of a pollution condition of a running environment and judgment of external insulation fouls of a power grid.

Description

technical field [0001] The invention relates to a method for measuring the equivalent salt density and ash density on the surface of a composite insulator umbrella group. Background technique [0002] Composite insulators, like traditional porcelain or glass insulators, play the basic role of supporting wires and preventing current from returning to ground in overhead transmission lines. According to the definition of the electric power industry standard, the rod body and the umbrella cover of the composite insulator are composed of two or more insulating materials, in which the outer insulating material is an umbrella group and sheath composed of high-temperature vulcanized silicone rubber, and the inner insulating material is reinforced by epoxy resin. Pulled unidirectional fiberglass rods. According to the characteristics of the power grid operating environment, one of the main purposes of using composite insulators in my country is to prevent pollution flashover. The o...

AI Technical Summary

Problems solved by technology

However, this method is obviously not accurate enough for composite insulators: unlike the inorganic materials of porcelain and glass insulators, the umbrella group of composite insulators is silicone rubber material, and the organic components (siloxane) in the silicone rubber umbrella group are due to hydrophobic mobility. It continuously migrates to the outer layer, and in the process, it interacts with the dirt on the surface and combines closely together, eventually resulting in the old and dense dirt layer that is difficult to clean with water, especially the surface of the shed after long-term operation, which will leave rainwater that cannot be washed away , the stubborn dirt layer that cannot be cleaned by the wind

Therefore, traditional methods for pollution measurement of glass and porcelain insulators are not accurate for composite insulators