PMSG-Based Stand-alone Wind Energy Conversion System Using Quasi Y-Source Inverter and Battery Storage

Abstract

In this paper, a boosting interface configuration for a wind energy conversion system (WECS) based on permanent magnet synchronous generator (PMSG) and quasi-y-source inverter is presented and analyzed for standalone operation. The interface system includes a battery storage system to provide instantaneous energy balance. The WECS comprises wind turbine, PMSG, three phase diode rectifier, quasi-y-source inverter, synchronous bidirectional buck dc-dc converter and a battery storage system. This inverter inherits all advantages of impedance network based inverters. In addition, this topology draws continuous current from the source which is required for many renewable sources. It also has dc-current-blocking capacitors, which avoids saturation in the transformer core. The operation principles and required relations are derived and described. Simulations are performed in two scenarios, with constant and varying input torque to verify the proposed system. The results show good consistency with theoretical analysis.