Development of a Welding Seam Detection and Scanning Device for GIS Shell in Substations
Gas Insulated Switchgear(GIS)in substations is an extremely important electrical equipment.The missed de-tection of welding seam defects may lead to internal SF6 insulation gas leakage,causing power grid accidents on the one hand,and its leakage can also cause air pollution.Currently,conventional A-ultrasound testing is used for GIS shell welds,with a defect detection rate of only 60%.The new document issued by the company's technical department requires that the defect detection rate of GIS shell butt welds should not be less than 90%.The QC team found through simulation experiments that using phased array ultrasonic testing technology and configuring appropriate scanning devices can achieve this goal,but the current scanning devices are not suitable for GIS shells made of non-magnetic aluminum alloy materials.The group developed a vacuum adsorption scanning device suitable for welding seam detection of GIS shells with different pipe diameters through reference.During this process,various tools and methods were used to determine the optimal solu-tion,and the project was strictly implemented item by item according to the principles of 5 W1 H,ultimately achieving the project objectives.The research results have been incorporated into the daily equipment management system and continue to play a role.They have been widely applied in various substations of the company,saving 2.28 million yuan in operation and maintenance costs,and reducing carbon emissions by 65000 kilograms per year.
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维普
