Speed Controller design for a PMSG based small wind turbine system

PMSG based small wind turbines are more and more used in modern electric generation systems. Two main topologies are commonly used for the generator side converter of these turbines. The first topology is based on a three-phase diode rectifier, an uncontrolled DC-link and a boost converter. The second topology is based on a two levels voltage source converter. Despite the fact that the first topology is the most used solution, there is a lack of research works that accurately present the related model and control. This paper presents a continuous model of a PMSG assisted by a three-phase diode rectifier, an uncontrolled DC-link and a boost converter. Also, it presents the design of an efficient speed controller that ensures robustness against rough changes of the wind input power. Several simulation results are presented and discussed to demonstrate the accuracy of the developed models and the robustness of the designed speed controller.