Method and device for identifying dominant oscillation mode of power system

The invention relates to the technical field of electric power system stability analysis, in particular to an electric power system dominant oscillation mode identification method and device, and the method comprises the steps: building an impedance model of each piece of electric power equipment in an electric power system, converting the electric power system into a multiple-input-multiple-output system based on the impedance model of each piece of electric power equipment, and calculating a transfer function matrix determinant frequency characteristic curve of the multiple-input-multiple-output system, identifying the dominant oscillation mode of the power system according to the curve, and quantitatively analyzing the oscillation stability of the power system to obtain a final identification result. According to the embodiment of the invention, the dominant oscillation mode of the power system is identified according to the curve, so that the oscillation stability of the power system is quantitatively ana