Integration of Doubly Fed Induction Generator Entirely Interfaced With Network in a Wind Energy Conversion System

This work is aiming to ameliorate performance of a wind energy conversion systems (WECS), based on double fed induction generator (DFIG), and extract power over wide range of speed variation. Indeed, the power of DFIG by two indirect converters associated with the principle of power distribution can operate the system conversion in a wide range of speed variation. The solution is attractive because it can raise the power density of the generator to twice its nominal power and consequently the size and cost of the system is reduced, another advantage is that the system is decoupled with electrical network, so the disturbances of the latter do not affect the DFIG. After modeling different parts of WECS, we proceed to the system control using MPPT with optimal operating point (OOP) method. Simulation work is carried out on the software MATLAB/Simulink and the results confirm the validity and reliability of the power structure and the control strategy used. (C) 2013 The Authors. Published by Elsevier Ltd.