Abstract
Due to the excellent insulation and arc extinguishing properties of SF6 gas, it is widely used in the production and use of high voltage GIS. However, due to the discharge and overheating fault, cause the SF6 gas decomposition, to generate a variety of low fluorine sulfide, therefore, through the detection of high voltage GIS can effectively determine the concentration of HF gas in high voltage switch state. This paper puts forward a kind of semiconductor laser based gas detection (TDLAS) technology, the flange fixed installation in high voltage switch, optical fiber sensing structure can realize remote, real-time online monitoring of HF gas content. The experiment shows that the flange fiber optic sensor on-line monitoring device can realize the effective measurement of HF gas. The results of this study can provide an entirely new scheme for on-line monitoring of high-pressure open-light SF6 gas decomposition products, which can realize real-time on-line monitoring of the internal gas of the high voltage GIS equipment.
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