| A wound-rotor induction machine operating as a Double Output Induction Generator (DOIG) with an AC-AC converter has been of interest to many researchers. According to the three schemes introduced and compared on the DOIG for wind energy conversion systems, modeling and simulating the DOIG and converter systems are completed. The models include a general mathematical model of the DOIG derived using the generalized machine theory, integrator diode and SCR models, an ideal switch IGBT model, and some control strategy models. In the simulations, the effects of the iron core saturation and unbalanced sources on the machine are simulated and verified, and the integrator semiconductor models are introduced and applied in MATLAB/SIMULINK. Models of a current vector control strategy and an indirect field-oriented current control strategy on DOIG are studied and simulated. The simulation study also includes the steady state and transient state analyses, and provides a comprehensive understanding of the system and a performance evaluation of control strategies. A common optimization equation is formulated for further simulations and studies. |
