Publications Scientifiques

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Author: search.filters.author.Abdelkhalek, OthmaneHas files: Yes

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    FPGA-Based Car-Like robot path follower with obstacle avoidance
    (IEEE, 2020) Moulay, Aicha; Laoufi, Fatima; Benslimane, Tarak; Abdelkhalek, Othmane
    This project is about the design and implementation of an System on Programmable Chip (SoPC) based automated path following with obstacle avoidance using infrared sensors and ultrasonic sensor.The Line follower robot is a mobile machine that can detect and follow the line drawn on the floor using infrared sensors which are installed under the robot. The path is predefined as a black line on a white surface with a high contrasted color.This robot is provided with ultrasonic sensor to avoid an obstacle either from the right or the and it will stop if an obstacle is detected on the path or if the path is ended.The digital controller is designed and implemented using both the integrated circuits and the Field Programmable Gate Array (FPGA)
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    A novel theory of reference reactive current identification based on the per unit system used for the active filters
    (2008) Abdelkhalek, Othmane; Benachaiba, C.; Benslimane, T.; Haidas, M.
    This paper, presents a new method of reactive current identification. The principle is based on the transformation of the voltage and current of the electrical supply network to the per unit system. The fundamental of the current is then obtained by extraction. This new method is compared to that of the theory pq. Interesting results were obtained with a satisfactory power factor correction
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    A novel theory of reference harmonic current identification based on the per unit system used for the active filters
    (2008) Abdelkhalek, Othmane; Benachaiba, C.; Benslimane, T.; Haidas, M.
    This paper presents a new method of the harmonic currents reference identification. The principle is based on the transformation of the voltage and current of the electrical supply network in the per unit system. For this proposed solution we suppose that the voltage supply is sinusoidal and the load current is polluted. The harmonic current of nonlinear load is then obtained by the difference between both signals; per unit current and voltage where per unit voltage signal represent the fundamental of the load current. This new method is compared with that of named pq theory. Interesting results were obtained with a very satisfactory filtered current THD
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    More stability and robustness with the multi-loop control solution for dynamic voltage restorer (DVR)
    (2009) Abdelkhalek, Othmane; Haidas, Mohammed; Kechich, Abderrahmane; Benslimane, Tarek; Benachaiba, Chellali
    This paper presents the application of dynamic voltage restorers (DVR) on power distribution systems for mitigation of voltage sags/swells at critical loads. DVR is one of the compensating types of custom power devices. An adequate modeling and simulation of DVR, including controls in MATLAB, based on forced-commutated voltage source converter (VSC), has been proved suitable for compensating the voltage sags/swells. In this paper, a double loop control method is proposed for the improvement of the stability of DVR during the load current variation. For the main loop (Outer Voltage Loop), we use a PI controller for the regulation of the filter condenser voltage. The second loop (Inner Current Loop) also uses a PI controller to control the disturbances current during load variation. Simulation results are presented to illustrate and understand the performances of DVR in the compensation of voltage sags/swell even with variation load condition