Improvement of power quality for grid connected wind energy conversion system using PMSG and Z source inverter

Abstract

Over few decades there has been an increasing use of Permanent Magnet Synchronous Generator mostly in the Wind Energy Conversion System applications This work is clearly deal with the study of grid connected Wind Energy Conversion System WECS by way of Permanent Magnet Synchronous Generator PMSG with Z Source Inverters The frequency and voltage variation of the inverters will be read out by the electric grid network The PMSGs and wind turbines are gradually entered in the field of power generation Huge wind farms are used at constant voltage and frequency to increase capacity power supply Particularly Permanent Magnet Synchronous Generators is used in this machinery due to special characteristics such as low weight volume and high performance The PMSGs overcome the Induction Generator IG and Doubly Fed Induction Generator DFIG Because the IG and DFIG are need the power supply to start the power production. But, PMSG never required the power supply at the starting time of power production PMSGs run at synchronous speed These type of inverter are classified has Z Source Inverter ZSI Quasi Z Source Inverter QZSI Trans Z Source Trans ZSI and Cascaded Multi Cell Z Source Inverter CMCTZSI etc This inverter is operated such as Shoot Through State and Non Shoot Through State Previously to convert DC supply to AC supply where the DC supply side have been boosted up to required AC supply level are executed The above mention shoot through state is not applicable to implementing in the conventional Voltage Source Inverter VSI and Current Source Inverter CSI Here PMSG and types of Z Source inverter systems are simulated in MATLAB 9 and also implemented in few Prototype Hardware Setup newline