Oscillation stability quantification method and system

The invention discloses an oscillation stability quantification method and system, and relates to the field of oscillation stability analysis. The method comprises the steps of obtaining sampling data; determining a control coefficient of the energy storage system according to the voltage source angular frequency, the voltage source synchronous angular frequency and the active power; determining the rotor motion variation of the grid-connected system according to the inertial parameter of the direct-driven fan set, the damping parameter of the direct-driven fan set and the synchronous angular velocity of the grid-connected system; according to the control coefficient, the inertial parameter of the direct-driven fan set, the damping parameter of the direct-driven fan set and the rotor motion variable quantity, determining a quantization parameter of the grid-connected system; the quantization parameters comprise oscillation frequency and damping ratio; and the quantization parameter is used for representing th