REDUCTION OF HARMONICS IN A WIND POWER CONVERSION SYSTEM BY THE OPTIMAL FUNCTION OF A VIENNA RECTIFIER AND SWITCHED INDUCTOR Z SOURCE INVERTER

Abstract

This paper proposes the performance of Vienna rectifier and switched inductance Z-source inverter for boosting the output voltage and enhances the power quality of wind energy conversion system (WECS). A three-phase rectifier and a voltage source inverter are used for AC/DC/AC conversion in the conventional method and a separate DC/DC boost converter used to boost the voltage. The proposed method, Vienna rectifier and switched inductance z source inverter are employed for AC/DC/AC conversion and boost the output voltage of wind energy conversion to the required level without using an additional DC-DC converter. The PI control method is used for Vienna rectifier (VR) to increase the quality of rectifier output and simple boost technique is used in switched inductance z source inverter (SLZSI) to boost the voltage and to improve the quality of the system. The proposed method uses less number of switches to increase the output voltage. The proposed system provides good performance which increases the quality and reduces the Total Harmonic Distortion (THD) and cost. The proposed system is simulated using simulation software and performance is validated by simulation and experimental results.