Statistical analysis of defect modes and defect rate of isolating switches

Abstract

In engineering practice, the status evaluation of isolating switches is often carried out, and intelligent operation and maintenance are carried out based on the results of the status evaluation. It is necessary to master the basic information such as the defect rate and main defect modes of isolating switches. Based on the statistics of the isolation switches, the isolating switches are classified according to the structure, and the quantity and defect rate of different types of isolation switch under the voltage level of 110kV, 220kV and 500kV are calculated respectively. Then the parts of the isolation switch are divided, the types and proportions of defects in each part of the isolation switch are counted, and the defect information of the isolation switch is summarized from various aspects. Finally, it is found that although the defect rate of the isolating switches will be different due to different structures and voltage levels, the mechanism box is always the component with the largest defect proportion of the isolating switches, and the defect modes are diverse. The defect proportion of other components is relatively low and the defect type is relatively single.