Performance evaluation of a wind driven DOIG using a hybrid model

This paper presents the performance analysis of a wind-driven double output induction generator (DOIG) operating at varying shaft speeds. A periodic transient state analysis of DOIG equipped with two controlled power converters is carried out using a hybrid induction machine model. It is shown that practical aspects of power converters such as overlap and harmonics reduce the power output of the DOIG system and limit the operating shaft speed range, especially in the subsynchronous region near the synchronous speed. The validity of the mathematical model used in the analyses and the corresponding computer simulation results are verified experimentally.