A New Strategy using High Density PWM Converter in Single Phase to Three Phase Drive System for WECS Application

Abstract: The proposed system permits to reduce the rectifiers switching currents, the harmonics distortion at the input converter side, and improvements on the fault tolerance characteristics. Single phase to three phase drive system composed of High density PWM rectifier, a three phase inverter and PMSG. The feed-forward method can help the auxiliary active energy storage circuit working as a parallel active power filter for filtering out the low frequency ripple current from the H-bridge rectifier. The total energy loss of the proposed system may be lower than that of a conventional one. Suitable control strategy including the pulse width modulation technique is developed.

Keywords: Ac-dc-ac power converter, drive system, parallel converter.