Modeling and Analysis of Dual Three-Phase Self-Excited Induction Generator for Wind Energy Conversion Systems

Multiphase self-excited induction generators have recently become more deeply interesting due to its advantages, compared to its equivalent three-phase generators, such as post-fault operations and lower torque ripple. However, as an induction generator, it has some limitations regarding poor voltage and frequency regulation under varying load and speed regimes. A steady state analysis is fundamental to comprehend the machine's behavior. For a more precise modeling, a non-linear variation of the magnetizing inductance is considered. This paper presents a detailed mathematical model and analysis of the dual three-phase self-excited induction generator for wind energy conversion systems connected to different loads. Simulation results are provided to show the behavior of the machine and its build up voltage through different load conditions.