High performance control of PM synchronous generator (PMSG) for wind energy conversion

Abstract

The present thesis is dedicated to high performance control of a variable speed permanent magnet synchronous generator with two back to back PWM converters for renewable energy applications in general and for wind applications in special. The wind power potential in many countries around the world has led to a large interest and fast development of wind turbine (WT) technology in the last decade. The integration of a high level of wind power into electrical network implies new challenges as well as new approaches in operation of the power system. According to the new requirements the wind turbines should stay connected and contribute to the grid in case of disturbances such as voltage sags, dips. The grid side inverter capability to work both in gridconnected but also in stand alone mode as well as the protection in the case of the fault event are considered to be the most challenging in terms of control strategy and the limited fault current. The main goal of the thesis is to offer new high performance solutions in the area of control permanent magnet synchronous generator with two back to back PWM inverters for wind applications.