Modelling and power control of grid-connected wind energy system

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Nadia Ben Si Ali
Nora Zerzouri
Nadia Benalia

Abstract

Wind energy generation has attracted great interests in recent years. Doubly Fed Induction Generator (DFIG) for wind turbines are largely deployed because variable-speed wind turbines have many advantages over fixed-speed generation such as increased energy capture, operation at maximum power point, improved efficiency, and power quality. This paper presents the operation and vector control of a Doubly-fed Induction Generator (DFIG) system where the stator is connected directly to a stiff grid and the rotor is connected to the grid through bidirectional back-to-back AC-DC-AC converter. The basic operational characteristics , mathematical model of the aerodynamic system and vector control technique which is  used to obtain decoupled control of powers are investigated using the software Matlab/Simulink.

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