Electrotechnique

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

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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.
Étude et commande d’une turbine éolienne par la technique MPPT à vitesse variable.
(2026) BENZINA Fatima; BELMEKKI Asma
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.
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.
Amélioration du diagnostic des défauts des transformateurs électriques par la fusion d'algorithmes de machine learning utilisant les données AGD
(2025) BAHI, Fatima Zahra; BELKENADIL, Amel; BOUDJELLA, FATIMA ZOHRA
This work focuses on the diagnosis of power transformers, which are key components in the stability and performance of electrical networks. These transformers, operating according to Faraday’s principles, enable the transmission of energy over long distances. Their monitoring is therefore crucial to prevent serious failures. The study is primarily based on Dissolved Gas Analysis (DGA) in insulating oil, which is an effective method for detecting internal faults in power transformers. In this work, a modern approach based on artificial intelligence, particularly machine learning, was explored. This method enables algorithms to learn from data in order to predict the condition of the oil and detect potential faults.The results show that integrating machine learning significantly improves diagnostic accuracy, enabling more reliable predictive maintenance and better management of electrical equipment.
Commande robuste du système d’énergies renouvelables
(2025) Benkrama, Khedidja; ALLAM, Mohamed
This project focuses on the development of advanced control strategies for a wind energy conversion system based on a Doubly-Fed Induction Machine, aiming to improve efficiency, stability, and robustness. Three control methods were studied : • Direct Vector Control (DVC) offers fast response but is sensitive to flux estimation errors. • Indirect Vector Control (IVC) more stable but depends on accurate machine parameters. • Fuzzy Logic Control combines flexibility and high robustness, well-suited to rapid wind speed variations. Simulation results using MATLAB/Simulink show that fuzzy control delivers the best dynamic performance and robustness compared to classical vector control approaches.
Etude technico-économique de l’installation d’une ferme photovoltaïque dans la région de Béchar-Algérie
(2025) Oneiz, Feryal; ADJOUDJ, Labiba
Currently we have a reliable power grid,so much so that an incident on the power supply is felt by the citizen as a personal aggression. Many people reason as if electricity was accumulated in large tanks and that the operation of a swish was aquivalent to the opening of a tap .the reality is very different ,since electricity is not stored , at least in AC current as our networks are ,and therefore we must constantly ensure the balance between production and consumption. The fatal increase in load over the last few years has forced the state to invest in the electricity sector either by injecting new power plants such as TARGA’S largest powerplant in the west or building nes lines , such persists , which forces sonelgaz to find other solutions such as loadshedding or to improve the transited power as well as the economic distribution of power. For this we will focus on the study of the Algerien network,we will try to find the problems encountered related to theeconomis distribultion of powers in pratice. Subsequently, we will try to find solutions and we will try to find solutions and we will move towards therealization of the current renewable energy especially photovoltaic energy
Simulation numérique d’une configuration non uniforme du champ électrique dans l’huile de transformateur de puissance
(2025) BELMILOUD, FAYCAL ABDELAZZIZ; BENSMAIL, BOCHRA; ZELMAT, Samir
This dissertation focuses on the study of power transformers in terms of structure, function, insulation techniques, and internal electrical stresses. The Flux 2D simulation program was used to analyze the electric field inside the power transformer under six different conditions in terms of cable diameter and distance from the tube. The Weidmann method was applied to evaluate the dielectric stress in the insulating oil, taking into account the effects of geometric shape, mesh accuracy, and different modeling types (2D or axisymmetric). The results demonstrated the importance of diameter and distance in the distribution of the electric field. Safety margins were also calculated to confirm the validity of transformer designs even under overvoltage conditions.
conception et réalisation expérimental d'un nouveau dispositif de filtration électrostatique a deux étages
(2025) BENSENOUSSI, Abderrahmane; AMRI, Ikram; AOUIMEUR, Djillali
Etude et réalisation d’un système de production d’énergie électrique par des panneaux photovoltaïques
(2017) HADJ ABDERRAHMANE, Mohammed El Amine; GHEZZAL, Mohammed Walid; FLITTI, Mohammed
Photovoltaic energy is the youngest of the renewable energies, it has the advantage of being non-polluting, flexible and reliable. for this reason we realized a system which tracks the sun's course from multiple angles (solar tracker ) So that it completely irradiates the panel in order to improve the efficiency of the solar panels by 30 to 40%
La conception et la réalisation d’une pompe d’insuline
(2024) SLATNA, imad eddine; BENAZZA, Baghdadi; BELAID, Boumedyen
Diabetes is a chronic disease affecting an increasing number of people worldwide. Its management requires continuous monitoring of blood glucose levels with precise insulin administration, tasks often burdensome for patients. With the increasing prevalence of diabetes, there is a need for a non-invasive and controlled method of managing it, offering diabetic patients a more comfortable and secure quality of life. It is in this context that our project "InsuVida Techno" takes on its full meaning. We have developed an innovative device aimed at automating insulin administration based on patient needs. This system uses photoplethysmography (PPG) to monitor real-time blood glucose variations, thus providing a more intelligent and responsive solution for diabetes management. Through the integration of advanced technologies such as the ESP32 board, our project allows continuous glucose tracking, precise estimation of glycemic variations with wireless (WiFi/Bluetooth) sending and display of glycemic parameters measured by our device to a smartphone and OLED display while administering appropriate insulin in cases of hyperglycemia or hypoglycemia and alerting the patient by an alarm. Insulin administration is ensured by a pump implemented using a stepper motor controlled by ESP32, thus guaranteeing an appropriate and rapid response to glucose level fluctuations. Our project aims to significantly improve the quality of life of diabetic patients by offering them an automated and less invasive solution for controlling their disease, while contributing to research in the field of smart medical devices.
Development of an innovative Aerosol Sensor based on electrical charge measurement to assess collection efficiency. (ECS)
(2024) BOUSSAID, Issam Mohamed Ali; AOUIMEUR, Djillali; GHERBI, Sabah
Introduction: Improving the filtration efficiency of electrostatic precipitators requires an understanding of the physical phenomena involved in their operation. Numerical methods have also enabled significant progress to be made in the sizing and general architecture of any filtration system. However, the operation of these filters is not always stable, and fluctuations in filtration efficiency frequently occur, necessitating the implementation of a monitoring system and permanent quantification of discharge concentrations [1-2]. Consequently, the detection, sampling and counting of these particles using precise instruments are of paramount importance in preserving air quality [3]. Most of these instruments, currently indispensable to any filtration process, operate intermittently and can only analyze a puncture of the total polluted flow. Objective: The detection and measurement of airborne solid or liquid aerosol particles with aerodynamic diameters between 1 nm and 100 μm has become an important topic in air pollution monitoring and source characterization. In recent years, there has been considerable interest in submicron aerosol particles, defined as suspended aerosol particles with aerodynamic diameters of less than 2.5 μm, for two main reasons. Firstly, these particles have been associated with adverse health effects in areas of high concentration, and secondly, aerosols are believed to have a significant influence on atmospheric quality, local and global climate and processes in various industries such as food, pharmaceutical and medical, electronics and semiconductor [4]. To this end, aerosol particle instruments have been developed to monitor indoor and outdoor aerosols in the pollution and process control industries [5-6]. A number of commercial instruments are available, using various methods to detect and measure the size distribution and number or mass concentration of particles. Available instruments include a Palas Model Welas-1000 granulometer based on the use of a white light source [7], a Scanning Mobility Particle Analyzer (SMPS) using the electrical mobility of particles [8], a condensation particle counter (CPC) using particle growth and optical properties [9-10], an electrical aerosol detector (EAD) using the electrostatic charge measurement technique [11] and an electrical low-pressure impactor (ELPI) using particle inertial impact under low pressure [12]. These commercial instruments are widely used 7 Abstract to measure airborne ultrafine particles and provide high-resolution measurements, but they are very expensive and large in size. The present manuscript is structured around three chapters. In the first chapter, we present a literature review on electrostatic precipitation as an air pollution control tool and the applications of discharges for particle charging and collection, taking care to recall pollution vectors and air pollution control techniques, before going into detail on what electrostatic precipitation encompasses by reviewing the processes involved upstream, during and downstream of the phenomenon. The second chapter focuses on the detailed description and definition of the characteristics of the various device components, as well as the measurement protocols and techniques used for the different experimental rigs. Finally, the third chapter looks at a new aerosol presence detection system that detects particles suspended inside a capacitive electrostatic sensor (ECS) connected to a sensitive electrometer, in order to assess the collection efficiency of precipitators. We conclude with some conclusions and prospects.

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