Modeling and MPPT control of DFIG wind energy system

This paper presents the modeling and maximum power tracking strategies for of variable speed constant frequency (VSCF) doubly-fed induction generator (DFIG) system. Firstly, the system simulation model w as construct ed in PSCAD. The grid-side double closed lo op vector control strategy is used to maintain a constant DC bus voltage and to compensate for reactive power at grid, while the stator -flux-oriented vector control is ad opted in rotor-side converter to achieve maxim um power point tracking (MPPT) for the D FIG wind turbine. Secondly, two M PPT method s are discussed and compared for various operating conditions.