Subsynchronous oscillation suppression method and device of new energy unit and storage medium

The invention discloses a new energy unit subsynchronous oscillation suppression method and device and a storage medium. The method comprises the following steps: performing spectral analysis on output oscillation current of a new energy unit according to a preset time interval, and obtaining subsynchronous oscillation amplitude and frequency of subsynchronous frequency band current; when the subsynchronous oscillation amplitude exceeds a preset amplitude threshold value, adaptive filtering is carried out on the output oscillation current according to the subsynchronous oscillation frequency, and a subsynchronous oscillation waveform is obtained; corresponding control is added to an excitation system of the phase modifier according to the subsynchronous oscillation waveform, so that the phase modifier outputs same-frequency and opposite-phase suppression current to the new energy unit; and correcting the suppression frequency and the suppression phase of the suppression waveform of the suppression current acc