Continuous commutation failure suppression method based on dynamic compensation of firing angle deviation

•The mechanism of continuous commutation failure caused by trigger angle deviation is analyzed.•The causes of the trigger angle deviation are analyzed: One is phase deviation caused by the inherent response of the phase locked loop; the other is the phase deviation of the asymmetric commutation voltage.•A method for dynamic and adaptive compensation of trigger angle deviation is proposed.•This method has good suppression effects on continuous commutation failure under different working conditions.