Power Conversion in PMSG Wind Energy Conversion Systems using Trans Z Source Inverter

A sustained power conversion with Trans Impedance Z Source Inverter (TZSI) is proposed for a Permanent Magnet based Synchronous Generator (PMSG) which is applied to a stand-alone Wind Energy Conversion System (WECS). In WECS, the stochastic fluctuation of wind velocity changes the output power, thereby the traditional Voltage Source Inverters (VSI) are not possible to produce constant voltage to the load. Hence Z Source Inverter (ZSI) is developed to produce output power very near to constant by adjusting the shoot through period. However, the voltage regulation concern the ZSI is not suitable for high Modulation Index (MI) because the raise in MI lowers the voltage regulation. To achieve a high gain from high modulation index Trans ZSI is proposed. This paper analyse the performance of Trans ZSI in 2MW PMSG based WECS. The proposed system validity is proved by the MATLAB Simulink simulation results.