Multi-source power terminal cross-domain attack detection method and system

The invention discloses a multi-source power terminal cross-domain attack detection method and system, and the method comprises the steps: carrying out the digital modeling of a target power grid, and obtaining a first power system model; based on the multi-source power terminal cross-domain attack existing in the target power grid, correcting the first power system model, extracting a first equation of the corrected second power system model, and obtaining a second power system model according to the first equation and a mean square error between an actual value and a predicted value; constructing a loss function of a multi-source power terminal cross-domain attack data detection model according to the multi-source power terminal cross-domain attack parameters; and respectively inputting the voltage phase angle and the frequency of each node obtained in real time into the multi-source power terminal cross-domain attack data detection model to obtain multi-source power terminal cross-domain attack data, and a