Validity Analysis of GIS Equipment Status Quantity with Voltage Level of 500 kV and Above

In order to effectively improve the efficiency of GIS equipment condition maintenance, it is necessary to accurately evaluate its health status, and it is important to select the effective state quantity. This paper analyzes the historical data of defects and faults of GIS equipment, and quantitatively evaluates the detection effectiveness of related status quantities of GIS equipment from the method of defect detection. The results show that the defect detection rate of monitoring alarm is the highest, and the detection effectiveness of frequent suppression, oil leakage, body gas chamber leakage and corresponding state quantity of secondary accessories of the mechanism is the best among the monitoring alarm defect detection methods. Among the detection methods of live detection defects, the effectiveness of the corresponding state of bulk partial discharge and gas chamber leakage was the best. Among the abnormal events of existing equipment, insulation defects such as air leakage and partial discharge of the body and mechanical performance defects of the mechanism and box accounted for the highest proportion. In the operation and maintenance of the equipment, the ultra-high frequency and ultrasonic partial discharge detection, body temperature rise, abnormal noise, SF6 density meter and pressure gauge corresponding to the above defects should be strengthened. The research results have reference significance for the reliable operation and maintenance of GIS equipment.