Alarm method for substation misoperation

The embodiment of the invention provides an alarm method for misoperation of a transformer substation. The alarm method comprises the steps of obtaining historical data and real-time data of a plurality of power transmission and transformation operation devices; analyzing the historical data and the real-time data, calculating the occurrence proportion in the real-time data according to the cumulative occurrence frequency of fault codes in the historical data, and determining the risk value of each power transmission and transformation operation device in the multiple power transmission and transformation operation devices based on the occurrence proportion; when the risk value exceeds the threshold value, generating the alarm information of different levels according to the risk value; and sending the alarm information to operation and maintenance personnel for processing. Starting from hidden danger and defect management of power grid operation equipment, the breadth, depth and accuracy of power grid monito