Ben Alaya JİHENE, Adel KHEDHER, Mohamed Faouzi MİMOUNİ

Speed-Sensorless DFIG Wind Drive Based on DTC Using Sliding Mode Rotor Flux Observer

In this paper, we present a grid-connected wind turbine equipped with double-fed induction generator directly connected to the grid in the stator side and interconnected via a power converter in the rotor side. The aim of this paper is to control the rotor side power converter via a speed sensorless direct torque control using a rotor flux observer based on the sliding mode method combined with the classical Lyapunov stability theory. The speed sensorless direct torque control seeks to provide a tracking of speed and rotor flux in spite of an unpredictable wind fluctuation. To control the grid side converter, a network voltage vector oriented control strategy is developed. The proposed strategies tested under parametric variations and different scenarios of wind speed disturbances, evaluate the system performances.

Keywords:

Wind Energy Converter System; DFIG; Sensorless Control; DTC; Flux Observer,

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