Eight-switch Converter using PMSG Based WECS for Stand-alone Applications

This paper introduces a study of stand-alone variable speed small wind energy conversion system (WECS) using eight-switch converter to fulfill a satisfied minimizing of power switches reaches to 20 % less than the B-2-B converter by using new PWM technique to generate the gating pulses for power switches. In addition, the PWM technique has proved the ability to simplify the control strategy. Maximum power is extracted by controlling the three phase boost converter. Inverter is controlled to maintain the load voltage and the load frequency to be constant. Battery energy storage system (BESS) is used to fix the dc-bus voltage and compensating the load power by using a reliable control technique based on the pulse width modulation (PWM). To validate the proposed topology, the simulation results show that the proposed topology outperforms the state-of-the-previous topologies in terms of reducing power elements and simplifying the control structure.