Dynamics of wind-turbine driven Self-Excited Induction Generator with online parameter calculation

This paper presents the dynamics of wind-turbine driven Self Excited Induction Generator (SEIG) with the consideration of dynamic core losses and dynamic mutual inductance. The core losses when considered are often taken as function of air-gap voltage and very few researchers included the variation as function of stator synchronous frequency. Similarly in most of the cases mutual inductance is taken as constant which is a simplified version of true dynamics. In this paper simulation studies are carried out to assess the dynamic performance of SEIG considering both the core losses and mutual inductance as dynamic variables. The performance is assessed in presence of variations in rotor speed, simulated as wind's effect, by a simplified wind turbine model. It is observed that dynamic mutual inductance and dynamic rotor losses are important parameters for accurate voltage and current measurements.