Nadia Benalia

Publications

1 MRAS Based Speed Sensorless Control of Induction Motor Drives

Authors: Nadia Bensiali, Amar Omeiri, Nadia Benalia

Abstract:

The recent trend in field oriented control (FOC) is towards the use of sensorless techniques that avoid the use of speed sensor and flux sensor. Sensors are replaced by estimators or observers to minimise the cost and increase the reliability. In this paper an anlyse of perfomance of a MRAS used in sensorless control of induction motors and sensitvity to machine parameters change are studied.

Keywords: Stability Analysis, adaptive observer, induction motor drive, MRAS

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Abstracts

1 Modeling and Power Control of DFIG Used in Wind Energy System

Authors: Nadia Benalia, Nadia Ben Si Ali, Nora Zerzouri

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 Mathlab/Simulink.

Keywords: Power System Stability, Wind turbine, doubly fed induction generator, wind speed controller

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