Abstract

This paper investigates the performance of a multi-level input soft switching fly-back converter under Zero Voltage and Zero Current Switching (ZVZCS) condition and a Model Predictive Control (MPC) to predict the currents in a Permanent Magnet Synchronous Motor (PMSM), powered by a stand-alone Wind Turbine (WT) system with a variable-speed Permanent Magnet Synchronous Generator (PMSG), during wind speed variations. In this scheme the soft switching fly-back converter is proposed to hold the DC-link voltage on a constant value, as the input of the voltage source inverter driving the PMSM. The soft switching technique, provides ZVZCS for both main and auxiliary switches of the fly-back converter at both turn-on and turn-off states. The model predictive current control of PMSM allows the prediction of the stator current behavior to achieve a high quality speed control. Simulation results confirm the good performance of the proposed configuration under wind speed and load torque variations.

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