Design of power electronic transformer based variable speed wind energy conversion system

The increasing energy demand makes the engineers switch over to renewable energy sources. Wind energy is one of the most vital and encouraging sources of renewable energy all over the world since it is considered to be non-polluting and economically affordable. For large variation in wind speed, the output of wind turbine is variable in both voltage and frequency, which requires a regulation at its output side to get a constant voltage and frequency. This project focuses on a wind energy conversion system using Power Electronic Transformer (PET) and permanent magnet synchronous generator. The single phase Power electronic transformer eliminates the bulky AC line frequency transformer used in the conventional PMSG wind energy systems. This proposed transformer is a high-frequency power electronic converter. Therefore, the weight and size of the transformer are considerably reduced. It has bi-directional power flow capability. The number of switches used in this proposed PET is less. The proposed wind energy conversion system model is designed and simulated using LabVIEW and the converter is simulated using Multisim 13.0 package. The wind energy conversion system and power electronic transformer is co-simulated by the LabVIEW-Multisim software. The constant frequency nature of the proposed PET helps in the integration of wind energy conversion system with the grid.