An integrated torsional mode damping method for a current source
converter, including a rectifier, an inverter, and a DC link inductor
coupled between the rectifier and the inverter, includes sensing a signal
representative of torque on a shaft coupled to the inverter or rectifier;
using the sensed signal for detecting a presence of a torsional vibration
on the shaft; and damping the torsional vibration by modulating active
power through the respective inverter or rectifier.