Publications Internationales

Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/13

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Author: search.filters.author.Boudouda, AimadHas files: Yes

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    A randomized carrier-based discontinuous pulse width modulation strategy for neutral point clamped three-level inverter
    (Publishing House of the Romanian Academy, 2024) Boudouda, Aimad; Aibeche, Abderrezak; Bouzida, Ahcene; Boudjerda, Nasserdine
    This article introduces a novel approach called randomized carrier-based discontinuous pulse width modulation (RCDPWM) to address the challenge of mitigating both low-order and high-order harmonics concentrated at the switching frequency and its integer multiples in the output voltage and current of a three-level inverter. The proposed strategy reduces switching losses and a wide dispersion of voltage and current harmonics with significantly smaller amplitudes by integrating features from discontinuous and randomized PWM methods. This characteristic proves beneficial for enhancing efficiency and electromagnetic compatibility. The RCDPWM strategy involves three schemes: two simple schemes (one random parameter), randomized pulse position modulation (RPP-DPWM) and randomized carrier frequency modulation (RCF-DPWM), and a dual scheme combining the two previous ones (RPPRCF-DPWM). Power spectral density (PSD) is used to assess the effectiveness of the proposed strategy in quantitatively analyzing the harmonic dispersion degree. The results demonstrate that the proposed RCDPWM strategy significantly expands harmonic clusters around the switching frequency, reducing its intensity. The spectrum analysis revealed that the RPPRCF-DPWM scheme is the most effective in spreading the output voltage and current spectrum compared to simple schemes (RPP-DPWM and RCF-DPWM).
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    adaptive wavelets sliding mode control for a class of second order nderactuated mechanical systems.
    (2021) Nafa, Fares; Boudouda, Aimad; Smaani, Billel
    The control of underactuated mechanical systems (UMS) remains an attracting field where researchers can develop their control algorithms. To this date, various linear and nonlinear control techniques using classical and intelligent methods have been published in literature. In this work, an adaptive controller using sliding mode control (SMC) and wavelets network (WN) is proposed for a class of second-order UMS with two degrees of freedom (DOF). This adaptive control strategy takes advantage of both sliding mode control and wavelet properties. In the main result, we consider the case of un-modeled dynamics of the above-mentioned UMS, and we introduce a wavelets network to design an adaptive controller based on the SMC. The update algorithms are directly extracted by using the gradient descent method and conditions are then settled to achieve the required convergence performance. The efficacy of the proposed adaptive approach is demonstrated through an application to the pendubot.
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    Stability improvement of power system with connected wind turbine using three-levels STATCOM
    (Inder Science Publicher, 2018) Bouzida, Ahcene; Abdelli, Radia; Aineche, Abderrazak; Boudouda, Aimad
    The penetration of Doubly Fed Induction Generator (DFIG) into the power grid has become an important concern for power system engineers today. Voltage stability is an important factor to maintain the wind farm in service during some abnormal operating conditions. This paper deals with the integration of Synchronous Static Compensator STATCOM to overcome the voltage stability issue for the power systems with connected wind turbine. A dynamic model for the DFIG has been presented and the integration of a STATCOM to maintain stable voltage has been studied during a low voltage conditions. The developed system is simulated and the results demonstrate that the good control of STATCOM enhances voltage regulation as well as transient stability of the DFIG during three phase faults. Many verifications based on timedomain simulations have been presented in order to show the STATCOM capability in improving transient stability of the power system
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    Combined random space vector modulation for a variable speed drive using induction motor
    (Springer, 2015) Boudouda, Aimad; Boudjerda, Nasserdine; El Khamlichi Drissi, Khalil; Kerroum, Kamal
    and analyzed in steady-state characteristics of the motor B Aimad Boudouda aimad.boudouda@gmail.com Nasserdine Boudjerda n_boudjerda@yahoo.fr Khalil El Khamlichi Drissi drissi@lasmea.univ-bpclermont.fr Kamal Kerroum Kamal.KERROUM@lasmea.univ-bpclermont.fr 1 Department of Electrical Engineering, University Mohamed Seddik Ben Yahia, Jijel, Algeria 2 Pascal Institute, Blaise Pascal University, Clermont Ferrand, France in closed loop, which is advantageous in reducing acoustic noise