A method and system for directly converting MODBUS data into IEC61850 data based on machine learning is provided. A data direct conversion method according to an embodiment of the present invention generates a theoretical value on the basis of external information, estimates a parameter represented by a measurement value through machine learning using a measurement value and a theoretical value output from the power generation device, To convert the data structure of the measured value. Thus, MODBUS data can be directly converted into IEC61850 data without data re-conversion using the data gateway.
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