Fault detection method and device of electric power system, and electric power system

The invention discloses a fault detection method and device of a power system and the power system. The method comprises the following steps: acquiring first feature data and second feature data; inputting the first feature data and the second feature data into a power system operation state determination model, and processing the first feature data and the second feature data by using the power system operation state determination model; obtaining an operation state corresponding to the first feature data and the second feature data obtained by processing the first feature data and the second feature data by a power system operation state determination model; and determining whether the target power system has a fault according to the operation state. According to the invention, the technical problem that the accuracy of data analysis is affected and potential safety hazards exist in the electric power system due to the fact that data in the electric power system is collected and analyzed manually in the pri