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var str = 'Evaluation des caractéristiques physico-chimiques, microbiologiques et sensorielles du concentré de tomate enrichis par l’huile d’olive vierge: Evaluation of the physicochemical, microbiological and sensory characteristics of tomato concentrate enriched with virgin olive oil';
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]]>
Tomate concentrée]]>
Huile d’olive]]>
Conservation]]>
Qualité physico-chimique]]>
Qualité microbiologique]]>
Qualité sensorielle]]>
Sécurité Alimentaire]]>
Food Quality]]>
Le but de notre travail est d’évaluer la qualité de la tomate concentrée enrichie par l’huile d’olive locale vierge et son effet sur lesparamètres biochimiques, nutritionnels et sensoriels du concentré de tomate. L’huile d’olive utilisée présente des caractéristiquesphysico-chimiques identiques aux valeurs de la littérature. L’addition de 5ml de l’huile d’olive vierge dans la tomate concentrée etconservée durant 1 mois n’influe pas sur le plan physico chimique par rapport à celui du témoin en absence de l’huile d’olive. 20mL d'incorporation contribue, en plus, à une amélioration significative de la teneur en substances minérales du concentré et de la préservation des protéines et des sucres durant toute la durée de stockage contre les pertes par effet d’inhibition du développement des germes. Les analyses microbiologiques indiquent que notre produit est indemne de toute contamination, à savoir l’absence totale des Staphylococcus aureus, Clostridium sulfito réducteurs, coliformes fécaux et coliformes totaux. Par contre, on note une diminution de la flore aérobie mésophile totale en fonction de l’augmentation de la dose de l’huile d’olive vierge ajoutée. Les analyses sensorielles montrent qu’il y a une amélioration de la qualité organoleptique de nos produits du point de vue (couleur, odeur et goût), spécifiquement dans le cas de la tomate concentrée additionnée avec 20ml de l’huile d’olive vierge.]]>
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var str = 'BOUHADI, Djilali';
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var str = 'HARIRI, Ahmed';
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var str = 'SAHNOUNI, Fatima';
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var str = 'BELKHODJA, Hamza';
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]]>
Revue Nature et Technologie; Vol. 14 No. 02 (2022); 08-17]]>
Revue Nature et Technologie; Vol. 14 No 02 (2022); 08-17]]>
2437-0312]]>
1112-9778]]>
Hassiba Benbouali University of Chlef]]>
2022-08-24]]>
Copyright (c) 2022 Revue Nature et Technologie]]>
https://creativecommons.org/licenses/by/4.0/]]>
https://journals.univ-chlef.dz/index.php/natec/article/view/39/23]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
Peer-reviewed Article]]>
https://journals.univ-chlef.dz/index.php/natec/article/view/39]]>
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var str = 'Production de bioéthanol à partir de jus d'orange de Rouïba: Production of bioethanol from orange juice of Rouïba';
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]]>
Jus d'orange de Rouïba]]>
Bioéthanol]]>
Déshydratation]]>
Indice d’octane]]>
Essais normalisés]]>
Production de Bioéthanol]]>
Bioethanol Production]]>
Les circonstances écologiques et économiques actuelles poussent de plus en plus les chercheurs à l’échelle internationalenotamment en Algérie à opter pour une source d'énergie renouvelable, respectueuse de l'environnement, propre, et durable tout en préservant les réserves pétrolières à la génération future. Les biocarburants restent l'issue la plus prometteuse qui peut remplacer les carburants des sources fossiles, tout au moins à les incorporer sous forme d'additifs à des proportions variables. Ce travail consiste à déshydrater le bioéthanol par deux méthodes à savoir : - la distillation fractionnée ; - et les tamis moléculaires de type A4. De plus, la caractérisation a été effectuée sur des carburants de types essences incorporées de 10 % de bioéthanol. Les mélanges obtenus ont été caractérisés selon des essais normalisés tels que : la distillation ASTM, l'indice d'octane, la tension de vapeur REID, etc. Il ressort de ce travail que l’addition de 10 % de bioéthanol à l’essence super a permis une amélioration de l’indice d’octane de l’essence allant de 98 à 100.]]>
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var str = 'ELBEY, Samira';
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var str = 'ZOUBIRI, Fatma Zohra';
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var str = 'RIHANI, Rachida';
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var str = 'BENTAHAR, Fatiha';
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]]>
Revue Nature et Technologie; Vol. 14 No. 02 (2022); 01-13]]>
Revue Nature et Technologie; Vol. 14 No 02 (2022); 01-13]]>
2437-0312]]>
1112-9778]]>
Hassiba Benbouali University of Chlef]]>
2022-06-30]]>
Copyright (c) 2022 Revue Nature et Technologie]]>
https://creativecommons.org/licenses/by/4.0/]]>
https://journals.univ-chlef.dz/index.php/natec/article/view/38/22]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
Peer-reviewed Article]]>
https://journals.univ-chlef.dz/index.php/natec/article/view/38]]>
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var str = 'Energy Management System in Smart Micro-Grid';
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]]>
Energy Management System (EMS)]]>
Smart Micro-Grid (SMG)]]>
Stateflow (SF)]]>
StateMachine (SM)]]>
This paper focuses on discussing an energy management system (EMS) for a smart microgrid integrating multiple renewable sources. The task of the EMS is to efficiently balance power generation and consumption by controlling various energy sources, including photovoltaic systems, energy storage units, engine generator set and the utility grid. An EMS optimizes power flow between the microgrid components and keeps the micro-grid stable, by using different control strategies. In this microgrid, the PV system serves as the primary energy source, while the other sources of electrical energy act as backups. The energy management system prioritizes supplying load demand from either the PV system or the other sources, with load shedding during peak hours if the supplied energy is insufficient. The approaches based on StateMachine and StateFlow are discussed in this paper for enhancing the energy management system's performance.]]>
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var str = 'BENTARZI, Hamid';
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]]>
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var str = 'OUADI, Abderrahmane';
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var str = 'ZITOUNI, Abdelkader';
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]]>
Algerian Journal of Signals and Systems ; Vol. 8 No. 2 (2023): AJSS; 67-75]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v8i2]]>
Laboratory of Signals and Systems, Algeria]]>
2023-12-31]]>
Copyright (c) 2023 Hamid BENTARZI, Abderrahmane OUADI, Abdelkader ZITOUNI]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/196/165]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/196]]>
10.51485/ajss.v8i2.196]]>
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var str = 'Technical and Economic Feasibility Study of a Hybrid Hydrogen-based Renewable Energy System';
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]]>
Renewable sources]]>
Hydrogen energy]]>
dimensioning]]>
Technical and economic Study]]>
HOMER]]>
Traditional electrical grids rely heavily on Hydrocarbons. The latter turn out to be a significant cause of environmental damage, as well as being rapidly depleted. Remote regions and settlements cannot benefit from this kind of electric energy as they are disconnected from the electrical network. Hybrid renewable energy systems (HRES) proved as being a great option in such cases. The objective of this article is to construct and optimize an autonomous hybrid renewable power plant to meet the demand for electricity for an isolated drilling location in Adrar region in the south of Algeria. To address the issue of intermittent power from wind and solar sources, a hydrogen-based arrangement is included in the already existing hybrid renewable energy system. The system modeling and running are carried out using HOMER package to identify the best cost-effective HRES arrangements. ]]>
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var str = 'RECIOUI, Abdelmadjid';
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var str = 'DEKHANDJI, Fatma Zohra';
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]]>
Algerian Journal of Signals and Systems ; Vol. 8 No. 2 (2023): AJSS; 41-54]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v8i2]]>
Laboratory of Signals and Systems, Algeria]]>
2023-12-31]]>
Copyright (c) 2023 Abdelmadjid RECIOUI, Fatma Zohra DEKHANDJI]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/195/162]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/195]]>
10.51485/ajss.v8i2.195]]>
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var str = 'Proposal of a Process for selection solar cells Nanosatellite';
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]]>
PEDAGO-SAT]]>
solar cell]]>
procedures]]>
qualification for aerospace]]>
low-cost]]>
By the PEDAGOSAT project we aim to democratize all educational activities related to CubeSat-class: nanosatellite, from physics through engineering, technical achievements, integration, to testing and operations to the greatest number of students. The key idea is to eventually have our academic nanosatellite training platform offering an open source opportunity to Algerians universities, and having the capacity to cover all engineer training areas relating to "small satellites". As part of this project, some satellite subsystems, test and emulation facilities will be realized, processes and procedures for testing and integration related to space technology will be addressed, implemented and even mastered. The presented work is part of the development of the on-board power system, and covers the selection of solar cells for the manufacture of solar panels of this satellite. The main source of energy present in space is solar energy, it a continuous and inexhaustible source that a satellite can. In satellite we use a solar panel to ensure its operation. In the dimensioning of a satellite, it is essential to identify these electrical power requirements named “power budget analysis”. Indeed, this makes it possible to determine the number of cells and/solar panels to be installed to guarantee the power continuity of the satellite in sunlight phase of its orbit by recharging its batteries and feeding equipment’s. During all the mission duration; from the beginning of life (BOL) after the launch to it deorbits (EOL) to disintegrate in the atmosphere. For the PEDAGO-SAT as for other satellites, it will be necessary to verify the parameters and physical characteristics of the solar cells/panels according to certified procedures and methodologies in order to be able to pronounce on their qualification for aerospace use. In this context, we propose a low-cost process revision to be able to carry out qualification tests with an accessible facility in the university labs. This revision will also concern the development of homemade means and software that fit the investments that may be made by the Algerian research and academic facilities. As illustrated in this paper a performance evaluation of low-cost solar cells was done using the developed solution and the selected cells will be integrated in the solar panels of PEDAGOSAT.]]>
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var str = 'LARIBI, Asma';
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var str = 'BOUTTE , Aissa';
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var str = 'BELAIDI, El Yazid';
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var str = 'AIT AMIRAT, Mokhtar';
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]]>
Algerian Journal of Signals and Systems ; Vol. 8 No. 2 (2023): AJSS; 33-40]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v8i2]]>
Laboratory of Signals and Systems, Algeria]]>
2023-12-31]]>
Copyright (c) 2023 Asma LARIBI, Aissa BOUTTE , El Yazid BELAIDI, Mokhtar AIT AMIRAT]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/194/161]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/194]]>
10.51485/ajss.v8i2.194]]>
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var str = 'Impact of Converter Topology on the Shunt Active Power Filter Systems Efficiency';
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]]>
Multi-level (NPC) inverter]]>
Shunt active power filter]]>
Power quality improvement]]>
Fuzzy logic control]]>
Harmonic current compensation]]>
Total Harmonic Distortion (THD)]]>
IEE-519 standard norms]]>
This paper presents the performance of shunt active power filters (Shunt APFs) which can compensate harmonic currents generated by no-linear load based on five and seven-level neural point clamped (NPC) inverters. Multilevel inverters are currently being investigated and used in several industrial applications. Their advantages include the capability to reduce the harmonic content and decrease the voltage or current ratings of the semiconductors. On the other side, fuzzy techniques are successfully employed in various industrial applications; they represent a good alternative to traditional control systems. To benefit of all these advantages an efficient control scheme for five and seven-level Shunt APF based on multi-carrier pulse width modulation (MC-PWM) and fuzzy control approaches are adopted in this work. The fuzzy controller is designed to improve compensation capability of shunt APF by adjusting the error using a fuzzy rule. The control strategy to identify the current reference uses synchronous detection method (SMD), this technique is easy to implement and achieves good performances. The numerical simulation results carried with MATLAB-Simulink and SimPowerSystems Toolbox show the effectiveness of the proposed systems and confirm the superiority of the seven-level shunt APF compared to five-level configuration system.]]>
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var str = 'CHENNAI, Salim';
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]]>
Algerian Journal of Signals and Systems ; Vol. 8 No. 2 (2023): AJSS; 59-66]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v8i2]]>
Laboratory of Signals and Systems, Algeria]]>
2023-12-31]]>
Copyright (c) 2023 Salim CHENNAI]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/193/164]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/193]]>
10.51485/ajss.v8i2.193]]>
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var str = 'Symmetrical L-slots Reconfigurable Triple band Antenna for Mutiband Applications';
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]]>
CPW-fed, multiband antenna, reconfigurable]]>
This paper introduces a novel compact reconfigurable antenna that utilizes monopole technology and tunable frequencies through switch control. The antenna is fed by a coplanar waveguide (CPW) and features a unique patch design with two L-shaped slots and integrated switches. This inventive design enables remarkable reconfigurability, allowing the antenna to operate within the frequency ranges of [3.8-3.93 GHz], [5.05-5.3 GHz], and [7-7.5 GHz]. These frequency ranges are strategically chosen to align with specific application requirements. The antenna also boasts an almost omnidirectional radiation pattern. The experimental outcomes highlight the efficacy of the proposed antenna, which occupies a compact footprint of 34x35.4 mm², making it particularly well-suited for applications requiring multiband functionality.
Keywords: CPW-fed, multiband antenna, reconfigurable.]]>
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var str = 'fertas, fouad';
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]]>
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var str = 'fertas, khelil';
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]]>
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var str = 'mouloud , CHALLAL';
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]]>
Algerian Journal of Signals and Systems ; Vol. 8 No. 2 (2023): AJSS; 76-80]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v8i2]]>
Laboratory of Signals and Systems, Algeria]]>
2023-12-31]]>
Copyright (c) 2023 fouad fertas, khelil fertas, CHALLAL mouloud]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/192/166]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/192]]>
10.51485/ajss.v8i2.192]]>
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var str = 'An Overview of Software-Defined Radio Technology in CubeSat Communications';
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Small satellites, ground stations, Software Defined Radios (SDRs), software-based operations]]>
Small satellites are becoming more popular because they are cost-effective, easy to assemble, and use commercially available parts. However, traditional ground stations that communicate with small satellites require a lot of hardware and are expensive to build. This makes it challenging to get the most out of small satellites' information. Software Defined Radios (SDRs) have been developed to reduce the cost of these ground stations by doing many of the tasks in software. Many universities and organizations are developing SDR ground stations to communicate with satellites in different orbits. Communication with satellites is critical to their development and operation. This paper proposes a ground station that uses SDR technology to communicate with one or more small satellites in Low Earth Orbit (LEO). The station is cost-effective, portable, and easily scaled, allowing it to acquire data from satellites.]]>
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var str = 'KHOUANE, Boulanouar';
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var str = 'BELBEKRI , Nasreddine';
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var str = 'BENMANSOUR, J. Eddine';
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Algerian Journal of Signals and Systems ; Vol. 8 No. 2 (2023): AJSS; 55-58]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v8i2]]>
Laboratory of Signals and Systems, Algeria]]>
2023-12-31]]>
Copyright (c) 2023 Boulanouar KHOUANE, Nasreddine BELBEKRI , J. Eddine BENMANSOUR]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/189/163]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/189]]>
10.51485/ajss.v8i2.189]]>
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var str = 'Design and simulation of Demodulator Based BELL-202 standard for NanoSatellite Communication Sub-system';
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Educational Nano-Sat]]>
PEDAGO-SAT]]>
BEL-202]]>
AFSK]]>
communication sub-system]]>
In recent years a trend of using CubeSat-class nanosatellites for commercial and scientific missions has taken the lead; this is due to the advantage of the available and low-cost products on the market without need for a large development and infrastructure investments. On our behalf, the advanced approach is to build a CubeSat platform dedicated to academic and engineering training on the different satellite subsystems, including development of a transponder based on products and software/hardware solutions accessible to the research and academic community in order to promote its use to engage in cross-team development on the basis of this platform and allowing the aggregation of a know-how.
In this context, the work presented in this paper, handles partly the problematic by a proposal of the communication system design, intended to be integrated on our platform; with a particular focus on the implementation of an FSK modulator based on the Bell 202 standard. The reported development project will include simulations, implantation and the validation tests performed to achieve our first prototype.]]>
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var str = 'Mohamed belkacem, yasmina';
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var str = 'boutte, aissa';
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Algerian Journal of Signals and Systems ; Vol. 8 No. 1 (2023); 28-32]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v8i1]]>
Laboratory of Signals and Systems, Algeria]]>
2023-06-30]]>
Copyright (c) 2023 yasmina Mohamed belkacem, aissa boutte]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/186/160]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/186]]>
10.51485/ajss.v8i1.186]]>
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var str = 'Smart Energy Management for a Microgrid System Based on Echo State Networks─Gray Wolf Optimizer Hybrid Algorithm';
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Smart energy management]]>
microgrid]]>
echo state network]]>
gray wolf optimizer]]>
This work present a smart energy management system for a microgrid based on a hybrid intelligent adaptive algorithm composed of an echo state network and gray wolf optimizer techniques. The microgrid connected to the grid is composed of renewable sources such as photovoltaic and wind conversion associated with a hybrid battery hydrogen fuel generation storage system. An adaptive intelligent control unit is developed to manage the power flow between the hybrid power sources and other devices in the system. The controller chooses the optimal operating mode of power sources ensuring the continuous supply of the injecting power in the grid and maintaining the battery state of charge at acceptable levels as the hydrogen tank level. Complete mathematical modeling for the proposed system is implemented in MATLAB/Simulink to track the microgrid performance. Numerical and graphical results are presented to show the effectiveness of the proposed control system]]>
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var str = 'Babouri, Khalida';
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var str = 'Abadlia, Issam';
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Algerian Journal of Signals and Systems ; Vol. 8 No. 1 (2023); 21-27]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v8i1]]>
Laboratory of Signals and Systems, Algeria]]>
2023-06-30]]>
Copyright (c) 2023 Khalida Babouri, Issam Abadlia]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/182/159]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/182]]>
10.51485/ajss.v8i1.182]]>