The invention discloses a double-feed blower fan
synchronous motor system and a method for inhibiting the oscillation of a synchronous generator. The method comprises the steps: detecting a power network
voltage through a locked-phase loop, obtaining d-axis and q-axis component signals of the power network
voltage, carrying out the
processing of the d-axis and q-axis component signals through two different error amplifiers and a phase compensator unit, and obtaining two compensation signals; enabling the two compensation signals to respectively serve as the front feed for the current control of a
rotor side converter of a
wind power generator, and adding the two compensation signals to the instruction values of the d-axis and q-axis components of a rotor current, so as to respectively compensate for the d-axis and q-axis components of the rotor current. The method achieves the control of amplitude and phase of the internal potential of a double-feed blower fan through the compensation control of the rotor current, further affects the amplitude and phase of the internal potential of a
synchronous motor through a
power transmission line, and achieves the inhibition of the oscillation of the synchronous generator. Because the corresponding speed of a
current loop is high and the d-axis and q-axis components of an
electronic current can quickly track the instruction values, an oscillation
signal can be extracted quickly when the synchronous generator generates oscillation, and the method quickly provides positive damping for the rotor of the
synchronous motor through adding a stable
signal.