Distribution substations are widely and dispersedly distributed geographically. The regular manual inspections of distribution substations require a huge amount of operation and maintenance work and have low operation and maintenance efficiency. By installing various Internet of Things intelligent sensors and intelligent devices in distribution substations, the intelligent transformation of traditional distribution substations is realized. It has intelligent functions such as abnormal operation alarms and potential fault analysis of distribution substations, improving the inspection efficiency of distribution substations and promoting the improvement of the reliability of distribution network power supply.