Abstract: Substation inspection is critical for power system secure operation management. With the rapid development of smart grid, it is urgently needed to develop a set of convenient and practical power substation inspection system, to make the inspection more accurate, the data more complete, and the operation procedures more clear. In this paper, the design and implementation of the handheld power substation inspection system is introduced. It combines the intelligent identification and mobile data transmission technology of IOT. Using a portable mobile terminal,it can identify the equipment and accomplish the inspection management through two dimensional code scanning. Inspection results are also automatically summarized and reported electronically. Furthermore, with paperless account management, it can provide end-to-end inspection solutions. This system can be operated independently. It can also provide data services for other systems and is helpful for management standardization. The system has been applied to the 110 kV Long Gang substation, and its easy and straightforward operation has been unanimously recognized on field. There is no doubt that it can be further extended to other application areas.

Key words: power inspection system, two-dimension code, intelligent recognition, equipment spacing, operation and maintenance management