Torque Ripple Suppression for PMSG with Interturn Short Fault Based on Zero Sequence Voltage

Permanent magnet wind generators (PMSG) are an important part of the wind power conversion system, and interturn short fault (ISF) is a common and highly destructive fault in PMSGs. ISF faults will cause significant ripples of electromagnetic torque, thereby affecting the output power quality of the wind turbines. To address this issue, this paper proposes a torque ripple suppression strategy utilizing the zero sequence voltage component (ZSVC). We calculate the compensation components injected into the dq-axis currents using the fundamental amplitude and phase angle of the ZSVC. Through simulation verification, the torque ripple under ISF faults is effectively suppressed when the PMSG operates under variable wind speed conditions.