Method of detecting power grid false data injection attack based on nonlinear measurement equation

The invention relates to the technical field of power grid data security, and is a method of detecting the power grid false data injection attack based on the nonlinear measurement equation. The method comprises the steps that in the first step, power grid data are obtained; in the second step, correlation analyses are performed on the states and measuration of the system; in the third step, innovation vectors are computed; in the fourth step, the detection and location of the false data are conducted; in the fifth step, the updates on the false data are carried out; in the sixth step, the estimations of the states are carried out. According to the method of detecting the power grid false data injection attack based on the nonlinear measurement equation, through the analyses of the correlation between states and measuration of the power grid system, the false data injection attacks which cannot be detected by traditional methods based on the measurement residuals are effectively detected, and the detection ac