Method for detecting impact of SF6 gas states on insulation materials

Abstract

The invention provides a method for detecting impact of SF6 gas states on insulation materials. The method comprises the following steps: step 1: preparing SF6 mixed gases, and filling the SF6 mixed gases in a detection device; step 2: collecting leakage currents flowing through the surfaces of insulation sample wafers in the detection device; step 3: according to the sizes of the leakage currents, analyzing the degree of impact of different SF6 mixed gases on the same insulation sample wafer and the degree of impact of one SF6 mixed gas on the insulation sample wafers of different insulation materials. Compared with the prior art, the method can determine the degree of impact of various states of SF6 gases on the surface insulation performance of the insulation materials, is easy to operate, and has strong practicality and popularization.

Description

technical field [0001] The invention relates to a detection method for insulating materials, in particular to an insulating material resistant to SF 6 Detection methods for gas state effects. Background technique [0002] Gas Insulated Switchgear (GIS) is more and more used in power systems because of its advantages such as less maintenance, small footprint, and high reliability. A large number of insulating components used in GIS equipment are used for Supporting and fixing conductors, including pot insulators, supporting insulators and insulating rods, etc., the quality and performance of these components have become an important factor affecting the safe and reliable operation of equipment. However, due to reasons such as on-site installation or improper control of the assembly process in the factory, water enters the tank and adheres to the surface of the insulating part, or the SF generated after the current is broken 6 Gas decomposition products produce hydrofluoric ...

AI Technical Summary

Problems solved by technology

However, due to reasons such as on-site installation or improper control of the assembly process in the factory, the water enters the tank and adheres to the surface of the insulating part, or the SF generated after the current is broken 6 Gas decomposition products produce hydrofluoric acid and other substances under the action of micro-water to adhere to the surface of insulating parts, which will lead to a decline in insulation performance. In severe cases, discharge failure will occur. Moreover, once the GIS equipment fails, the maintenance cost is high and the cycle is long. Seriously affect the normal operation of the power grid

In addition, due to the low cost of use and excellent surface hydrophobicity, composite insulating materials have also begun to be widely used in gas-filled switchgear such as post circuit breakers and switch bushings, but SF 6 Corrosion effect of hydrofluoric acid produced by gas on the inner wall of insulating bushing has not yet been studied

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