Publications Scientifiques

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Author: search.filters.author.Bentarzi, HamidEnd date: 2019

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Now showing 1 - 10 of 81
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    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
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    Memetic Algorithm for Coordinated design of Power System Stabilizers in multimachine system
    (IEEE, 2019) Baadji, Bousaadia; Bentarzi, Hamid; Belagoune, Soufiane
    a memetic algorithm is proposed for the coordinated design of power system stabilizers in multimachine power system in order to mitigate the electromechanical oscillations and enhance the system stability.The memetic algorithm is based on the combination traditional genetic algorithm and the Nelder-mead local search method in order to balance between the diversification and intensification so as to find the optimal parameters of the PSSs.The nonlinear simulation and Eigen analysis on the three machine nine bus system (WSCC) demonstrates the potential of the proposed controllers in the enhancement of the overall system stability
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    Human–Robot shared control for path generation and execution
    (Springer, 2019) Belaidi, Hadjira; Hentout, Abdelfetah; Bentarzi, Hamid
    A telerobotic system consists of integrating an operator into the control loop of a remote robot. Due to safety considerations, it is very important sometimes that the operator be able to remotely take control of the task and the robot. In this paper, a shared control mode for mobile robots is defined according to the operator ability to control the robot and the autonomy level of the robot itself. In this mode, the task execution is simultaneously accomplished by the operator and the robot, according to the percentage of the task-share coefficient. This depends on several factors such as robot autonomy, user ability, environment accessibility and task difficulty. An experimental application of the developed shared control for path generation task execution is planned for a non-holonomic mobile robot evolving inside a workspace cluttered with static obstacles. In this case, Non-Uniform Rational B-Splines curves are used to generate the robot path linking the Starting point I and the Target point F. The operator can control the robot even by selecting or inserting new control points on the initial feasible path, or by directly moving the robot via the developed Human/Robot Interface or the joystick
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    Impact of STATCOM on generator positive-offset mho element loss of excitation protection(
    (IEEE, 2017) Mati, Ayache; Bentarzi, Hamid
    In this paper simulation studies have been conducted using Simulink/MATLAB software in order to investigate the impact of STATCOM on the positive-offset mho element loss of excitation (LOE) protection scheme in synchronous generator. The obtained results show that the operation of the positive-offset protection scheme takes more time under the integration of STATCOM in the transmission line. Moreover, an under reach phenomena may occur under partial loss of excitation (PLOE) condition of a generator with lightly loading
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    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.
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    SMIB power system model with PSS for transient stability studies
    (IEEE, 2017) Bousaadia, Baadji; Bentarzi, Hamid; Bouaoud, Abdelhakim
    This paper presents the development of single machine infinite bus system (SMIB) model for transient stability studies with detailed synchronous machine model and a Power System Stabilizer (PSS) in matlab/simulink software. The proposed method of the SMIB simulator is computationally efficient and flexible for interfacing the synchronous machine with the external network and for extending to multimachine system representation. The Simulation on the SMIB for the machine model with manual control, with the excitation system included and with the excitation system and PSS is performed to evaluate the transient stability of the system when a three phase fault on the transmission line is occurred with different clearing times. The obtained results show an accurate performance of the model developed for stability studies.
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    Impact of STATCOM on generator positive-offset mho element loss of excitation protection
    (IEEE, 2017) Ayache, Mati; Bentarzi, Hamid
    In this paper simulation studies have been conducted using Simulink/MATLAB software in order to investigate the impact of STATCOM on the positive-offset mho element loss of excitation (LOE) protection scheme in synchronous generator. The obtained results show that the operation of the positive-offset protection scheme takes more time under the integration of STATCOM in the transmission line. Moreover, an under reach phenomena may occur under partial loss of excitation (PLOE) condition of a generator with lightly loading
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    A new framework of smart auto-recloser
    (IEEE, 2018) Bentarzi, Hamid; Ouadi, Abderrahmane; Abdelkader, Abdelmoumene
    Almost all type of faults that occur in distribution network are self-clearing faults, so the protective relays must not break the power circuit and interrupting the power supply to the consumers. Therefore, a protective device such as auto-recloser is more suitable for this situation. An auto-recloser is a circuit breaker associated with a control circuit that may automatically re-close the circuit breaker after opening it due to the fault detection. Since more than 80% of the faults are self clearing in their nature hence, power outage time can be reduced if the reclosing function is automated and carefully planned. In this paper, a new frame work of smart auto-recloser has been implemented in PC associated with NI7851 Card using the Labview. To validate the present work, the performance of developed device has been tested by Power System Simulator under different conditions.
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    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
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    Robust Wide Area Power System Stabilizers Design in Multimachine System based on Backtracking Search Optimization
    (IEEE, 2019) Bousaadia, Baadji; Bentarzi, Hamid; Ayache, Mati
    In this paper the design of a robust wide-area power system stabilizers (WAPSS) taking into account the effect of the time delay using Backtracking Search Optimization is presented. In The wide area control design the remote signal is used as input for the power system stabilizer since it has better observability compared to the local signal .However the introduced time delay due to communication links can degrade the performance of the WAPSS in some cases .The proposed BSA simultaneously search for the optimal WAPSS parameters that relocate the weakly damped modes and maximize the time delay for multiple operating conditions to guarantee the robustness. The effectiveness of the WAPSS is tested on the two-area four machine power system. The nonlinear simulation and eigenvalue analysis have revealed the effectiveness of the proposed controller in damping the inter-area oscillations even with a time delay in the remote signals.