Modeling and control of DFIG based wind turbine/storage system in islanded operation

Nowadays, many economic and environmental benefits derived from distributed generation (DG) enable DG to play an increasingly important role in distribution networks satisfying the expanding power demand. Doubly-fed induction generator (DFIG) based wind turbine has been widely used for DG due to its many advantages such as high efficiency, fine controllability and improved power quantity. In the situation of losing main grid supply, DG unit will suffer a severe loading mismatch compared with load consumption. Consequently, the voltage and frequency of the islanded system will exceed the allowable limitation. In this paper, the islanded behavior of DFIG based wind turbine/storage system is studied and the modeling and novel control strategies of this system are proposed. At last, the effectiveness of the proposed control strategies is demonstrated through MATLAB simulation.