Browsing by Author "Bentarzi, Hamid"

Now showing 1 - 20 of 110

Airplane Reliability Study Using Graph Theory Based Matlab GUI Application
(IEEE, 2019) Bourezg, Abderrabi; Bentarzi, Hamid
This paper presents an airplane reliability study using a developed Matlab GUI application that is based on graph theory. This study deals with the determination of the reliability of an aircraft by considering its all subsystems such as airframe, cockpit instrumentation, control system, electrical circuit and power plant system. The developed application can handle any failure distribution functions. It uses the inclusion-exclusion method for finding the minimal paths for directed acyclic graph using reliability block diagram. A system may be considered to operate if there exists a set of operating components from the source to the target. So, at least minimal paths must function for the system operation. The probability of the union of all minimal paths may be employed to determine the reliability of the whole system.
Analysis of small signal in North Africa Inter-Area Power System
(IEEE, 2019) Tsebia, Mohammed; Bentarzi, Hamid
The problem of oscillations in the interconnected power system is a subject of study in several regions. As the widening of the interconnected North Africa power system makes the grid very sensitive to low frequency oscillations, the presence of these oscillations can cause significant damage to the interconnection lines. The development of synchrophasor technology makes the system of measuring grid parameters more accurate with real-time synchronization. In this paper we used the PMU (Phasor Measurement Unit) for oscillations detection and signal analysis
Analysis of the disturbances in distribution networks using matlab and ATP
(2011) Boutora, S.; Bentarzi, Hamid; Ouadi, A.
The capacitance bank is generally used for compensation in a distributed power grid, if the latter is connected to the utility. An islanded power grid is a distribution grid disconnected from the utility. It can undergo a disturbance namely the ferroresonance phenomenon if the capacitance bank has a non adequate value. In this paper, a study of an islanded power grid is attempted to show the effect of the reconfiguration of the capacitance bank on the ferroresonance. A simulation of the circuit is conducted using Simulink/ MATLAB. In another part of this work, an example of overvoltage study in a distribution medium network using ATP is also presented
An application of phasor measurement unit to monitor a grid connected solar energy generation system
(2020) Mahboubi, Meriem; Bentarzi, Hamid; Ouadi, Abderahmane
While renewable energies are gaining more interest among today’s power sources, solar panels are increasing their contribution to the power grid day by day due to the greatest potential they have. Identical to all other types of power generation plants, the integration of solar energy sources into the grid increases its complexity and poses challenges to maintain the system’s stability. In this paper, an adaptation of a phasor measurement unit (PMU) based solution is proposed for solar plants integration in regular power grids. PMUs can measure the stamped phasors of the utility, which are critical parameters for the operation of power devices feeding power into the grid. This paper discusses the use of PMUs for providing the phase angle to system synchronization in the case of high penetration of solar energy into the grid, where the instantaneous monitoring of the voltage, current and power flow is an important requirement.
An application of PMU in solar energy generation Plant Connected Power Grid
(2019) Mahboubi, Meriem; Bentarzi, Hamid; Ouadi, Abderahmane
Solar energy is one of the most abundant green energies in our planet. In order to satisfy the world demand of electrical energy, solar energy may be used. Identical to all other types of power generation plants, the integration of the solar energy source in power grid has an impact on its operation. Thus, when the electrical power is injected into the power grid by the solar energy source, the system electrical parameters must be well monitored for synchronization purpose. This can be accomplished with the aid of synchro-phasors measurement units. The phase angle of the utility is a critical parameter for the operation of power devices feeding power into the grid like PV inverters. There are many techniques to obtain the grid phase angle such as the zero-crossing detection and the orthogonal phase locked loop. This research work discusses the use of PMUs (Phasor Measurement Unit) for providing this important parameter to system synchronization in the case of high penetration of solar energy in the power grid
Application of splines to three-dimensional map building for mobile robot
(2012) Belaidi, Hadjira; Bentarzi, Hamid; Belaidi, Abderrahmane
In mobile robot applications, building a map for mobile robot is very important task. In this work, a surface-based on numerical method such as Splines is used to investigate a model for the robot path planning. The developed algorithm generates a free collision path through the use of Splines for extracting the triangular mesh in the 3D environment surface. The triangular mesh helps the robot to locate the different stationary obstacles, the mobile robot and to track the target position. Synthetic Aperture Radar (SAR) sensors are used for acquiring the data related to the environment and the obstacles. The obtained results are very satisfactory
Automatic Voltage Regulator Design Using Particle Swarm Optimization Technique
(Institute of Electrical and Electronics Engineers Inc, 2020) Ahcene, Fazia; Bentarzi, Hamid
The generation of energy in large power systems and islanded networks is ensured by the synchronous machine, the enhancement of dynamic performance during disturbances is increasingly required. This research work aims to maintain the terminal voltage constant of a 1.5 kVA synchronous laboratory power machine with salient pole under different loads. Then, a second generator of 187103k VA with different exciting system is studied. A voltage regulation is ensured via a well-chosen controller named 'automatic voltage regulator' that is based on proportional integral controller (PI). The adopted optimization method that has been used to determine the regulator parameters is the particle swarm optimization algorithm (PSO). The automatic voltage regulator (AVR) is tested under three different conditions. The obtained simulation results are encouraged the validation of the use of the designed AVR
Capacity optimization of MIMO wireless communication systems using a hybrid Genetic-Taguchi algorithm
(Springer, 2013) Recioui, Abdelmadjid; Bentarzi, Hamid
Combating multiple access interference in wireless communication systems employing smart antennas
(IEEE, 2009) Recioui, Abdelmadjid; Bentarzi, Hamid; Azrar, Arab; Dehmas, Mokrane; Challal, Mouloud
Smart Antennas constitute a promising technology in wireless communication systems as they mitigate multiple access interference through spatial filtering. One basic building block of smart antennas is the antenna array itself. This latter generates a wide range of aspects that can be the subject of deep investigations namely their geometry, physical parameters, feeding techniques etc... Hence, it is important to investigate whether certain array geometry will enable optimal performance. In this work, the effect of the array geometry choice on the interference rejection capability is investigated. Linear and circular array geometries are considered with mutual coupling between real antenna elements taken into account. Assessment of both geometries is done through a figure of merit that takes into account the rejection capability and radiation characteristics of the array
Comprehensive learning bat algorithm for optimal coordinatedtuning of power system stabilizers and static VAR compensator inpower systems
(Taylor and Francis Ltd, 2019) Bousaadia, Baadji; Bentarzi, Hamid; Bakdi, Azzeddine
This article presents a novel comprehensive learning bat algorithm (CLBAT)for the optimal coordinated design of power system stabilizers (PSSs)and static VAR compensator (SVC) for damping electromechanical oscilla-tions in multi-machine power systems considering a wide range of oper-ating conditions. The CLBAT incorporates a new comprehensive learningstrategy (CLS) to improve microbat cooperation; location updating is alsoimproved to maintain the bats’ diversity and to prevent premature con-vergence through a novel adaptive search strategy based on relative trav-elled distance. In addition, the proposed elitist learning strategy speedsup convergence during the optimization process and drives the globalbest solution towards promising regions. The superiority of the CLBATover other algorithms is demonstrated via several experiments and com-parisons through benchmark functions. The developed algorithm ensuresconvergence speed, credibility, computational resources and optimal tun-ing of PSSs and SVCs of multi-machine systems under different operatingconditions through eigenanalysis, nonlinear simulation and performanceindices.
Contribution to improve the dynamic control of a binary distillation column
(Springer, 2017) Bendib, Riad; Bentarzi, Hamid
Density distribution of mobile ions in the oxide of MOS structures
(1992) Bentarzi, Hamid
The present work aims to study the mobile ion distribution in the oxides of MOS structures. The subject is introduced with the necessary background concept of MOS structure dealing with various aspects of oxid and its charges. A review is then...
Design and implementation of speed and torque controller for DC motor
(2018) Belhout, Saber; Rouari, Baha Eddine; Bentarzi, Hamid
Electric drives have many applications in different areas such as industry, transport, agriculture and domestic. The operation of electric drives are selectively regulated and made partly or fully automatic to increase the productivity and efficiency of the industry. The dc drives still play a significant role in modern industrial drives due to its higher performance, reliability, adjustable speed control etc. This project aim is to design and implement a speed and current controller for PMDC motor with a high performance. Using the chopper as a converter, the speed of DC motor may be controllable. The chopper firing circuit may get signal from controller in order to supply variable voltage to the armature of the DC motor at the desired speed. The controller consists of two different control loops, current control and speed control. The used controller is Proportional-Integral type due to its fastness. The current and speed controller is designed by taking into consideration the high stability even at high speed control of DC motor. The simulation of model is investigated and analyzed using LABVIEW and Simulink/MATLAB under different speed and torque conditions.
Design of an Advanced Optimal Fuzzy Controller For a Binary Distillation Column
(Université M'hamed Bougara de Boumerdès, 2024) Bendib, Riad; Mechhoud, El-arkam; Bentarzi, Hamid; Batout, Naoual
The most common control philosophy followed in the chemical process industries is the SISO system using the conventional PID controller algorithms. One drawback is relying on models for both control and design work in Chemical process industries (CPI) is that many problems are very complex and accurate models are difficult, if not impossible to obtain. To overcome these problems, it will be helpful to apply techniques that use human judgment and experience rather than precise mathematical models, which in the major cases deduced from the linearization of the system and simplification hypothesis. The fuzzy logic systems are capable of handling complex, nonlinear systems using simple solutions. However, obtaining an optimal set of fuzzy membership functions is not an easy task. In this chapter a solution based on artificial intelligence is proposed to improve the control of a binary distillation column. The solution is based on the use of the advantages of both fuzzy logic and genetic algorithms. The fuzzy logic is used as a supervisory PI controller that is a simple PI controller that generally used in controlling distillation columns with parameters deduced from the fuzzy supervisor. The membership functions shape is deduced by using research algorithms based on hierarchical genetic algorithms. The results show that the Fuzzy supervisory PI controller provide an excellent tracking toward set point change
Design of an IIR digital filter for phasor measurement improvement based on a hybrid optimization algorithm
(IEEE, 2013) Recioui, Abdelmadjid; Ouadi, A.; Bentarzi, Hamid
Developments and trends in emergency lighting systems: from energy-efficiency to zero electrical power consumption
(Springer, 2024) Abdelmoumene, Abdelkader; Bentarzi, Hamid; Iqbal, Atif; Krama, Abdelbasset
Emergency lighting systems are an essential component of building safety infrastructure and play a critical role in ensuring the safety of people during power outages or other emergencies. As energy efficiency and environmental sustainability continue to be a focus in building design and construction, there is a growing interest in developing emergency lighting systems that not only reduce energy consumption but also operate on zero electrical power. This paper presents a comprehensive review of emergency lighting systems, with a focus on energy efficiency and zero electrical power consumption. The study first examines traditional lighting systems such as incandescent bulbs and their limitations in terms of energy consumption and efficiency. Then discusses energy-efficient options (CFLs and LED lighting), which have significantly improved energy efficiency and reduced power consumption. It also explores the latest generation of emergency lighting systems (Tritium and Photoluminescent), which have zero electrical power consumption throughout their lifetime and provide long-lasting illumination without the need for external electrical sources. Additionally, the paper presents a detailed comparative study of the energetic, environmental, economic, and life cycle assessment of the different emergency lighting technologies. The results of the study revealed that the use of Power Free emergency lighting signs not only reduces the installation and maintenance cost but also eliminates utter energy consumption and greenhouse gas (GHG) emissions.
Differential relay reliability enhancement using fourth harmonic for a large power transformer
(Springer, 2017) Bouderbala, Rachid; Bentarzi, Hamid
A differential relay that is very sensitive relayoperating even at its limits may be used for protecting apower transformer. However, this characteristic may leadto unnecessary tripping due to transient currents such as aninrush and over excitation current. In order to avoid thismal-operation of the relay, a second and fifth harmonicblocking technique has been used; however this techniqueis not reliable if a second harmonic magnitude is weak. Inthis paper, a new approach is proposed using even har-monics (second and fourth). The test results show that thisproposed approach is a good blocking technique associatedwith the differential relay even for large modern powertransformer which has small second harmonic as well; itprovides a good discrimination between the transient cur-rents and the internal fault currents during internal fault.
Differential relay reliability enhancement using fourth harmonic for a large power transformer
(Springer, 2016) Bouderbala, Rachid; Bentarzi, Hamid
Digital differential relay reliability enhancement of power transformer
(2011) Bouderbala, R.; Bentarzi, Hamid; Ouadi, A.
In this paper, an improvement of digital differential relay reliability for protecting a large power transformer is discussed. First, the Fourier sine and cosine coefficients required for fundamental, second, third and fifth harmonics determination have been calculated using rectangular transfer technique. Then, these harmonics have been used in harmonics restrain and blocking techniques used in differential protection system. Simulation testes have been carried out on a variety of magnetizing conditions (normal aperiodic inrush and over excitation conditions) using Simulink/MATLAB. The obtained results shows that the developed approach provides good discrimination between the magnetizing current and the internal fault current
Digital distance relay reliability enhancement using real-time filter
(2011) Ouadi, Abderrahmane; Bentarzi, Hamid; Maun, Jean Claude
In the conventional three - zone stepped directional distance scheme, distance relay is used to provide the primary as well as remote backup protection. However, the mal-operation of this relay under stressed conditions such as power swing and switching action transient instability may affect the reliability of the whole protective scheme. The voltage and current phasors needed by the distance relay for determining the impedance may be measured with integrated Phasor Measurement Unit. However, this measurement accuracy may be affected by several power disturbances such as fast and slow dc offsets decaying due to sudden current changes, inter-harmonics, etc. To avoid these effects for improving the quality of measurements and hence the distance relay reliability, this work proposes a new real-time filtering method for removing the unwanted DC offset and hence improving SDFT algorithm. To validate the present method, the performance of developed distance relay is tested using the data generated by Simulink/MATLAB simulator. The obtained simulation results are satisfactory