Torsional vibration suppression system and method for synchronous motor

The invention relates to the technical field of high-power synchronous motors, in particular to a torsional vibration suppression system and method for a synchronous motor, and the system comprises a detection device and a suppression device. The suppression device comprises a data acquisition unit, a calculation and analysis unit and an execution unit which are in communication connection. The detection device is used for monitoring torsional vibration parameters in real time and sending the torsional vibration parameters to the data acquisition unit; the calculation and analysis unit is used for calculating an exciting current waveform required for suppressing torsional vibration according to the collected torsional vibration parameters; and the execution unit generates a required excitation current waveform according to a calculation result of the calculation and analysis unit, outputs and superposes the excitation current waveform in the excitation current output by the exciter, and then sends the excitat