Electrotechnique

URI permanent de cette collectionhttps://dspacee.univ-temouchent.edu.dz/handle/123456789/761

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Compensation de la puissance réactive dans les charges non-linéaires et aléatoires
(2026) ABLAOUI Ikram; HAMLET Rym; BERRACHED Djelloul
This thesis focuses on the optimization of reactive power compensation in industrial electrical networks, particularly those subjected to non-linear and random loads. Following a theoretical study of static compensation devices, we have developed robust calculation methods for filter- compensators (D.C.F). Our work, based on comparative and statistical analysis, allows for the adjustment of technical parameters to reduce voltage distortion, improve wave quality, and minimize installation costs. These solutions provide efficient and economically viable tools for the metallurgy and energy sectors.
Étude et commande d’une turbine éolienne par la technique MPPT à vitesse variable.
(2026) BENZINA Fatima; BELMEKKI Asma; ALLAM Mohamed
This work presents the study and control of a variable-speed wind energy system based on a 10 Kw Doubly Fed Induction Generator (DFIG). The main objective is to improve wind power extraction using the Maximum Power Point Tracking (MPPT) technique in order to ensure optimal turbine operation despite variations in wind speed. Two control techniques were studied, namely : MPPT control using a conventional Proportional-Integral controller (PI controller) and MPPT control using an intelligent Fuzzy Logic controller. The first method ensures reference speed tracking with a simple structure, while the fuzzy control provides better performance in terms of response speed, stability, and robustness against disturbances. This study highlights the importance of intelligent control techniques in improving the performance of variable-speed wind energy systems.
Classification des défauts des transformateurs électriques par des méthodes d’intelligence artificielle
(2026) AMAR BENSABER Sidi Mohammed Monsef; IZA Lamia Khadra; BOUDJELLA Fatima Zohra
This work focuses on improving the diagnosis of power transformers, which are critical components for the stability and efficiency of electrical networks. Continuous monitoring of this equipment is essential to prevent major failures. This research is primarily based on Dissolved Gas Analysis (DGA), an effective technique for identifying hidden internal faults. In this study, we explored a modern approach based on artificial intelligence and machine learning. Using a dataset of 709 samples, several normalization methods were tested. The simulation results indicate that combining Median IQR normalization with the Bagged Trees model, evaluated through a 5-fold cross-validation, delivers the highest diagnostic accuracy. Furthermore, an ablation study proved that a complete vector of 5 gases remains indispensable for maintaining reliable classification, paving the way toward optimal predictive maintenance for electrical infrastructures.
Conception et Réalisation d'un précipitateur électrostatique de type lames de scies-cylindre et disques -cylindre
(2026) MOKADEM Zohra; AISSOU Massinissa
This thesis is dedicated to the realization of two-stage electrostatic precipitators with different type of configuration. These devices are essential for the reduction of particulate emissions in industries. Contributing to the protection of the environment. First, we examined in detail the generalities of a “PES”. Then, we proceeded to a thorough description of these essential devices. Finally, we carried out experimental experiments, followed by a discussion and an in-depth analysis of the results obtained.
L’impact de la saumure rejeté SUR L’écosystème marin
(2026) NEHARI .A; MEHADJI MOHAMED; NEHARI .A
Seawater desalination represents a strategic response to the growing freshwater scarcity in Algeria. This thesis studies the diffusion of brine discharged from a seawater desalination plant and proposes an optimised design for the discharge system (submarine outfall and diffuser). The work is structured in four chapters: (I) environmental impact of brine on Mediterranean coastal marine ecosystems — osmotic stress on Posidonia oceanica and Cymodocea nodosa seagrass beds, residual chemical contaminant effects, long-term biodiversity impacts; (II) brine management and valorisation strategies, from advanced membrane technologies (HPRO, electrodialysis, membrane distillation) to the Zero Liquid Discharge (ZLD) concept; (III) dispersion techniques — discharge pipelines, submarine outfalls, inclined multiport diffusers, hydrodynamic modelling; (IV) in-depth case study of the Chatt El Hilal plant at Beni Saf (200,000 m3/day, reverse osmosis) using CORMIX v.4.2GT modelling, assessing the impact on Cymodocea nodosa meadows and validating the optimal diffuser configuration (P1: depth 8 m, D3=1.07 m, v=3 m/s, inclination 45°, S max=1,707 mg/L < threshold 2,000 mg/L).
Influence du choix des régulateurs floues sur les performances dynamiques et le rendement d’un hacheur DC alimenté par une source photovoltaïque
(2026) BOUKRA Abderahim; MEDDAH Chaker; ATTOU Amine
This study investigates the impact of fuzzy controller selection on the performance of a Boost converter in a photovoltaic system. The global system was modeled and simulated under MATLAB/Simulink across various irradiance levels. A comparative analysis was conducted between Mamdani and Takagi-Sugeno (TSK) fuzzy inference models, evaluating Triangular and Trapezoidal membership functions based on a reduced 3-rule matrix. These intelligent controllers were also compared with the conventional Perturb and Observe (P&O) method. Simulation results show that while the classic P&O method suffers from severe steady-state oscillations and slow convergence, fuzzy logic control completely eliminates these oscillations. Ultimately, the Triangular Sugeno configuration proved to be the optimal solution, offering an ultra-fast, overshoot-free response to abrupt climatic variations, while ensuring maximum efficiency and stable Maximum Power Point Tracking (MPPT).
Bras manipulateur opérant sur un objet tridimensionnel statique
(2026) CHENAFA Mariem; YOUNES Khedidja
This thesis presents the design, modeling, and numerical validation of a five-degree-of-freedom (5- DOF) serial robotic manipulator equipped with a horizontal rotating base for operations on spherical surfaces. This original architecture is intended to optimize axisymmetric tasks such as inspection, drilling, and surface treatment while reducing mechanical and algorithmic complexity. A vector- guidance approach based on a dual-targeting system was developed to ensure motion continuity and minimize orientation singularities. The forward kinematic model was established using homogeneous transformation matrices, while the inverse kinematic model was solved analytically through vector decoupling. Workspace analysis enabled the determination of trajectory reachability conditions and the identification of singular configurations specific to the proposed architecture. Model validation was achieved through cross- verification between a Three.js-based 3D simulation environment and a scientific solver developed in Python, demonstrating a high level of agreement between analytical results and simulated trajectories.
Réalisation et optimisation d'un précipitateur électrostatique à deux étages basé sur l'impact de l'ionisation corona
(2026) BOUCHEKIF Yassine; BENICHOU Youcef; AISSOU Massinissa
This workfocuses on the study of the performance of a two-stage electrostaticprecipitator as an effective solution for reducing air pollution generated by industrial and humanactivities. It emphasizesunderstanding the corona dischargemechanism and itsrole in particlecharging and collection, whileanalyzing the influence of electrodegeometry, electricalpolarity, and airflowcharacteristics on separationefficiency. The studyalsoaims to determine the optimal operating configuration for improving the collection of fine particles, which are the mostharmful to humanhealth, therebyenhancing the purification of industrialgases and contributing to the protection of the environment and public health.
Analyse expérimentale des émissions éléctromagnétique d’un variateur de vitesse commande par NE555
(2026) HAMEL OUM ELKHEIR; AMER BEN BEKRIT IKRAM; BENAZZA Baghdadi
This study presents an experimental analysis of electromagnetic interference (EMI) generated by a PWM speed controller for a DC motor, driven by an NE555 integrated circuit. The work focuses on designing the prototype and measuring the conducted emissions produced during the fast switching of power electronic components. The experimental results demonstrate that high voltage (dv/dt) and current (di/dt) variations are the primary sources of interference. Finally, the effectiveness of several mitigation techniques—including EMI filters, wiring optimization, and shielding—is validated to improve the system's electromagnetic compatibility (EMC).
Étude expérimentale des méthodes de chargement des particules et développement d'un algorithme d'IA pour déterminer l'état de leur charge électrostatique
(2026) HAZAM MOHAMED Kheir Eddine; ROGHDI Bouzid; MESSAFEUR Radjaa
This work focuses on the experimental study of electrostatic charging methods for granular particles used in plastic material separation processes. Experiments were carried out using charging devices based on particle sliding through aluminum and PVC tubes, as well as a flu- idized-bed system. The influence of particle mass, charging time, and fluidization velocity on the acquired electrostatic charge was investigated. The experimental results were then used to develop an artificial intelligence algorithm in Python capable of predicting the electrostatic charge state of the particles. The obtained results demonstrate that this approach is effective for analyzing and optimizing triboelectric charging processes.
Etude de métier Jacquard processus et automatisme
(2026) KHELIFI Mohammed Bilal; ZADI Chaima; YOUNES Mohammed
Ce mémoire traite de l'automatisation du métier à tisser Jacquard, un système mécanique du XIXe siècle reposant sur une logique binaire à cartes perforées, considéré comme l'un des précurseurs de l'informatique moderne. À travers une approche alliant histoire technique, analyse mécanique et conception électronique, nous avons modélisé et simulé un système de commande à base de microcontrôleur PIC16F877A capable de reproduire et d'améliorer le fonctionnement du métier Jacquard traditionnel, ouvrant ainsi la voie à sa réalisation sous forme de prototype intelligent.
Étude comparative d'une commande non linéaire par linéarisation entrée sortie et commande robuste par mode glissant d'un moteur asynchrone
(2026) DAOUD ZOUAOUIA; ZENASNI SAID; MENDAZ Kheira
Controlling electrical machines remains a challenge in modern industrial systems, which motivated us to choose this topic. This work compares two types of control strategies, in one hand is the advance control wish is the sliding mode control and in other hand non lineair control wish is input-output linearization control applied to an induction motor driven by an inverter. The complete system was modeled and simulated in MATLAB/Simulink. Both controllers were tested under load conditions, then subjected to a robustness test in which the rotor resistanceRr and rotor inductance Lr were intentionally increased by 50% from their nominal values. The results show that the two approaches lead to radically different performances. Sliding mode control maintained stable behavior regardless of the imposed parameter variations, while input-output linearization produced significant peaks and oscillations under the same conditions, confirming its sensitivity to parameter changes. This behavior is explained by the fact that this controller relies on an accurate model of the system once that model is no longer valid, performance degrades. In conclusion, when robustness to uncertainty is a requirement, sliding mode control is the most appropriate choice. Input-output linearization remains valid when the motor parameters are well known and stable.
Étude de simulation du champ électrique dans un séparateur électrostatique
(2026) BOUROUIS Ali; BOUAZZA HAMADOUCHE Aymen; ZELMAT Samir
This work focuses on the two-dimensional numerical modeling of a two-phase moving-wave electrostatic conveyor, applied to the separation of granular copper/PVC mixtures. The simulation was performed using COMSOL Multiphysics 5.3a with the finite element method, for three configurations: a vacuum conveyor, one with a conductive copper particle, and one with an insulating PVC particle. The analysis examines the distribution of the electric potential and the intensity of the electric field, particularly at the electrodes and particle corners. The results obtained are compared to those of a previous study performed with Flux 2D, revealing satisfactory convergence between the two solvers with a relative difference of 5.5% to 7.5%. It is demonstrated that the nature of the particle significantly influences the topology of the electric field, with the conductive copper particle generating a critical field concentration capable of causing dielectric breakdown.
L'intégration d'un dispositif FACTS pour l'optimisation des réseaux électriques
(2026) SAIAH Zenagui Mohammed; KHELIFI Lahcen; ADJOUDJ Labiba
This thesis focuses on the optimization of electrical power systems using Optimal Power Flow (OPF) and FACTS devices, particularly the Static Var Compensator (SVC). The main objective is to improve the technical and economic performance of the power network by reducing active power losses, enhancing the voltage profile, and satisfying operational constraints. After presenting the fundamentals of power systems and FACTS technologies, an SVC model and a mathematical formulation of the OPF problem were developed. The proposed methodology was applied to the IEEE 9-bus and IEEE 14-bus test systems using the PSAT/MATLAB environment. The obtained results demonstrate that the optimal integration of the SVC significantly improves voltage profiles, reduces transmission losses, and enhances system stability. The study confirms the effectiveness of combining FACTS devices with OPF techniques to improve the performance of modern electrical power networks.
COMMANDE VECTORIELLE SANS CAPTEUR DE VITESSE D’UN MOTEUR MSAP BASEE SUR UN OBSERVATEUR MRAS
(2026) GAID MOUSSA; TOLBA IMAD ABDESSAMED; ZEGAI MOHAMMED LAMINE
This work addresses sensorless vector control of a Permanent Magnet Synchronous Motor (PMSM) using an MRAS observer. It covers motor modeling in the (a,b,c) and (d,q) reference frames and the power supply chain, followed by the development of flux-oriented vector control with PI regulators. After comparing sensorless estimation techniques, the MRAS observer based on stator current is selected. Simulations confirmed accurate estimation of rotor speed and position, validating a high-performance, cost- reduced control strategy.
Réalisation d’un séparateur électrostatique de particules par l’utilisation d’un disque rotatif alimenté par des tensions polyphasées
(2026) ZENNANI Imane; ZELMAT Samir
Electrostatic separation techniques used actuator have emerged as an effective solution for the sorting of granular materials by exploiting differences in their electrical properties. These technics typically employ rotating or linear actuators combined with high-voltage electrodes to create non-uniform electric fields, enabling selective control over particle behaviour. The generated electro-adhesion force allows conductive particles to be attracted and retained on charged surfaces, while insulating particles can be removed through mechanical or pneumatic means. The objective of this work is to develop a new electrostatic separation device using a rotating disk to separate millimetre-sized plastic and metal particles. It will be evaluated experimentally. The actuator is powered by a high-voltage polyphase supply, producing a non-uniform electric field that induces electro-adhesion forces on conductive particles, while plastic particles are extracted by a vacuum blower system placed above the disk. Two different configurations of actuator disks were created and evaluated. The first type of actuator is a single-sided rotating disk-shaped, which is made from a single-layer printed circuit board (PCB) and has two helical concentric electrodes on its top surface. The second type of actuator is a double-sided rotating disk-shaped made from a double-layer PCB and has a helical electrode on its top side and a plan circular electrode on its bottom side. The study was conducted in two stages: the study of the electro-adhesion force than the examination of the separation performance of the metal/plastic combination. Each actuator was investigated separately using different high-voltage supplies. Important operating parameters such as applied voltage level, frequency, signal wave- form, air suction flow rate, vibrator feeding rate, disk rotation speed, and ambient humidity were all thoroughly examined for their effects. The high recovery and purity rates of the separation were validated by the results. Importantly, this device was insensitive to ambient humidity, in contrast to traditional electrostatic separation techniques, confirming its dependability for industrial applications in changeable settings.
Développement of MOSFET -Based Reversible Static Converter for photovoltaic Energy Systems
(2025) MARIKITE TAONGA, NIGEL; MUPAYA TANAKA, SHONGEDZAI; FLITTI, MOHAMED
Thisthesis presentsthe design and implementation of a reversible electric converter utilizing MOSFET technology. The primary objective is to develop a bidirectional power conversion system capable of operating efficiently in both rectification and inversion modes. Such converters are essential in modern power electronics, particularly in renewable energy systems, electric vehicles, and energy storage applications, where power flow needs to be controlled in both directions. The work begins with a detailed analysis of the principles of reversible converters and the role of MOSFETs as fast-switching, high-efficiency components. The design process includes selecting appropriate topology, component sizing, and developing a control strategy to ensure stable and reliable operation. Simulation models are developed using specialized software to validate the theoretical approach, followed by hardware implementation and experimental testing. The results demonstrate that the proposed MOSFET-based converter achieves high efficiency, fast switching performance, and robust bidirectional control. This study highlights the potential of MOSFETs in advancing compact, reliable, and energy-efficient power conversion systems.
Etude comparative entre techniques de commande par mode glissant et backstepping pour la régulation de la vitesse d’une machine synchrone à aimant permanent
(2025) GUENFOUD, Malak; SIDI AISSA, Kawther; ZEGAI, Mohammed Lamine
This work is part of a comparative study between vector control applied to a brushless synchronous motor using a classical speed controller without any adaptive strategy, and the same controller enhanced by advanced control techniques such as Sliding Mode Control and the Backstepping method. The simulation results obtained using MATLAB revealed that the proposed approaches offer efficient solutions in specific scenarios by enhancing the motor's dynamics performance, reducing response time, eliminating overshoots, and increasing the robustes of the system response.
Etude et conception d'un séparateur électrostatique pour le tri des fibres de carbone recyclées
(2025) Bentaieb, Aya; Khelifi, Achouak; MESSAFEUR, Radjaa
The recycling of composite materials represents a major challenge for the industry today, particularly in the context of sustainable development and the circular economy. Carbon fibers, widely used in the aeronautics, automotive and advanced technology sectors, pose significant challenges at the end of their life, due to their complex structure and their high manufacturing cost. Faced with these constraints, electrostatic separation appears as a promising solution to optimize the sorting and recovery of these materials, while preserving their essential properties. This experimental work focuses on the electrostatic separation of a mixture of recycled carbon fibers and polycarbonate (PC), using an electrostatic separator with modified airflow. The study examines the effect of high voltage and polarity on the Résumé 71 recovery and purity rates of materials, as well as on the dynamics of particles subjected to electrostatic forces. In order to better understand the mechanisms involved, numerical simulations were carried out using the COMSOL Multiphysics software to visualize the distribution of the electric field and refine the parameters of the experimental device. The results obtained confirm the effectiveness of electrostatic separation for the sorting of recycled carbon fibers and open up prospects for optimizing the process, with the aim of promoting a better integration of recycled materials in industrial applications.
Les perturbations électriques en BT
(2025) AOUABDI, Mohamed Diaa Eddine; TAAMOURT, Mohammed El Amine; Berrached, Djelloul
This bibliographic study focuses on electrical disturbances in low-voltage networks, such as amplitude variations (voltage dips, surges), distortions of the sinusoidal wave (harmonics, carrier currents), imbalances in polyphase systems, and electromagnetic disturbances, which pose major challenges. Their study revolves around identifying their origins, their impact on equipment, and appropriate technical solutions. Through theoretical analyses, this work proposes a rigorous methodology to diagnose, prevent, and correct these disturbances, ensuring better energy quality and compliance with standards.

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