Abstract
According to the structural characteristics of the disconnecting switches in GIS equipments,an online contact temperature monitoring method based on IR(Infra-Red) sensing is proposed. Highly emissive coating is spread on the contact surface to enhance its emissivity and the emissivity of infrared temperature sensor is adjusted to compensate the absorption effect of SF6. A GIS experiment platform is established and the influences of SF6concentration,IR filter and environmental temperature on IR sensing are researched. Experimental results show that,the indication of IR sensor reduces along with the increase of SF6 concentration,which could be compensated by lowering the emissivity of sensor. An online GIS contacts temperature monitoring system is designed based on the proposed method.
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