Publications Scientifiques
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Item Transient stability enhancement of interconnected power systems via coordinated tuning of wide-area damping controllers employing novel social grey wolf metaheuristic optimization(Springer Nature, 2024) Baadji, Bousaadia; Belagoune, Soufiane; Bentarzi, HamidPower system stability challenges arising from low-frequency oscillations are becoming increasingly acute due to the inefficiency of local damping controllers. This paper proposes a two-level architecture for wide area damping controllers (WADCs), optimized by a novel Social Learning Grey Wolf Optimizer (SLGWO) to increase the damping of critical inter-area modes, utilizing an objective function based on the integral of the time-weighted absolute error. The grey wolf optimizer (GWO) suffers from poor exploitation and local optimum trapping, primarily due to its reliance on the three fittest individuals for optimization. The SLGWO tackles these limitations by incorporating a social learning strategy, which facilitates the collective sharing of useful information among individuals, enabling them to enhance accuracy. Additionally, a computationally cheap elitist learning strategy propels the leading wolves to explore better regions, while a nonlinear control parameter is employed to optimize the exploration–exploitation trade-off. The performance of the SLGWO is benchmarked on 21 well-known test functions and compared against the original GWO, Bat Algorithm (BA), Whale Optimization Algorithm (WOA), Harris Hawks Optimization (HHO) algorithm,and Hippopotamus optimization(HO) algorithm. The comparison results are statistically confirmed using the Friedman test, confirming the superiority of the proposed approach. The effectiveness of the proposed WADCs is assessed through nonlinear simulations in the 10 machine 39 bus New England power system under severe disturbances, demonstrating a significant increase in the damping of inter-area oscillations.Item Developments and trends in emergency lighting systems: from energy-efficiency to zero electrical power consumption(Springer, 2024) Abdelmoumene, Abdelkader; Bentarzi, Hamid; Iqbal, Atif; Krama, AbdelbassetEmergency 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.Item An application of phasor measurement unit to monitor a grid connected solar energy generation system(2020) Mahboubi, Meriem; Bentarzi, Hamid; Ouadi, AbderahmaneWhile 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.Item Modeling and simulation of an operating gas turbine using modelica language(2023) Talah, Djamila; Bentarzi, Hamid; Mangola, GiovanniThis article uses Modelica to model and simulate the operating Gas Turbine (GT) in a combined cycle power plant in Ras-Djinet, Algeria. The modeling and simulation have been validated based on the data collected from this operating power plant. Details of GT modeling using Modelica language and ThermoPower library have been presented. Furthermore, the simulation results have been discussed in this article. The model has been examined in two different cases: the temperature effect and the reduction in fuel flow at a steady state. Besides, a comparison between the reel and simulation results for a different amount of fuel has been investigated. The accuracy of these simulations is noted and proven by the coherence of the simulation results with the experimental data collected from the power plant companyItem Optimal Placement of Phasor Measurement Unit in Power System using Meta-Heuristic Algorithms(2021) Laouamer, Mosbah; Djamel, Ridha; Bentarzi, Hamid; Kouzou, Ahmed LakhdarThe phasor measurement units (PMUs) play an important and vital role in power system monitoring and controlling, since they provide the power system phasors stamped with a common real time reference through a global positioning system (GPS). Indeed, from economical point of view it is not possible to set PMUs in all system buses due to the high cost and the requirement of more complex communication systems. Therefore, an optimal PMUs placement (OPP) problem is formulated to attain the minimization of such requirements. In this context, the main aim of the present research work is the investigation on the optimal approach that can be used to select the location of PMUs to be installed with minimum number using meta-heuristic algorithms. The simulations of the proposed algorithms such as the Particle Swarm Optimization, the Grey Wolf Optimizer, the Moth-Flame Optimization, the Cuckoo Search and the Wind Driven Optimization have been performed and tested on selected power systems such as the IEEE 14-bus, the IEEE 30-bus and the Algerian 114-bus.Item Quantitative assessment of three phase supply voltage unbalance effects on induction motors(Springer, 2015) Dekhandji, Fatma Zohra; Refoufi, Larbi; Bentarzi, HamidItem New approach of induction motor performance study under different voltage unbalance conditions(2006) Bentarzi, Hamid; Refoufi, L.; Dekhandji, Fatma ZohraItem Harmonic losses in inverter fed induction motor including skin effect(2005) Bentarzi, Hamid; Refoui, L.; Arras, A. H.