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var str = 'Risk Analysis and Assessment of Butane-Propane Splitter Column in the Skikda Refinery Petroleum Plant';
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]]>
Risk]]>
Threaten zones]]>
HAZOP]]>
PHAST]]>
Major scenarios]]>
Risk analysis and assessment are extremely important in the petrochemical sector to prevent potential risks. This study was carried out at Gas platform (unit No 30) of Skikda refinery Algeria, with the aim of predicting and estimating the effects of major explosions in the propane and butane Splitter column and estimating the possible human and environmental consequences of the containment loss. The methodology developed here is based on a combination of HAZOP presentation and PHAST tool. First, HAZOP is used to capture the responsible derivations of operating parameters to produce the worst consequences. Related Causes, safety barriers and some recommendations are carried out in a HAZOP sheet which represents all of that. Then the major scenarios detected by the worst consequences have been studied and modeled by PHAST software. The modeling process is completed by simulating the principal effects (Jetfire, BLEVE, UVCE) resulting from two scenarios in the form of two potential leaks on the bottom and the head of a gas separator column containing butane and propane respectively. The results are shown on the region map to indicate the exact threaten zones. Finally, a comparison in terms of effects between the two scenarios is performed and some conclusions are extracted.
]]>
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var str = 'BENAISSA, Amina';
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]]>
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var str = 'HAMAIDIA, Mohyiddine';
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]]>
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var str = 'KHELFAOUI, Malika';
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]]>
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var str = 'BENHAMLAOUI, Wafia';
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]]>
Algerian Journal of Signals and Systems ; Vol. 7 No. 4 (2022); 156-163]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v7i4]]>
Laboratory of Signals and Systems, Algeria]]>
2023-01-14]]>
Copyright (c) 2022 Amina BENAISSA, Mohyiddine HAMAIDIA, Malika KHELFAOUI, Wafia BENHAMLAOUI]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/176/151]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/176]]>
10.51485/ajss.v7i4.176]]>
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var str = 'A General Overview of Combined Cycle Gas Turbine Plants';
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]]>
Combined Cycle]]>
Gas Turbines]]>
Mathematical Modeling]]>
simulation]]>
control]]>
The Combined Cycle Gas Turbines (CCGT) has encountered a large diffusion over the last decades. Different researchers have focused on performance evaluation of CCGT through mathematical modeling techniques. Hence, there are some important factors which should be respected while modeling the CCGT. These factors include type of different components of the CCGT system, their configuration, the modeling methods, and the purpose of the modeling, the type and structure of the control system and the simulation objectives. Hence, a brief overview about CCGT design and technologies, mathematical modeling, simulation tools and methods are presented in this paper.
]]>
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var str = 'Talah, Djamila';
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]]>
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var str = 'Bentarzi, Hamid';
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]]>
Algerian Journal of Signals and Systems ; Vol. 7 No. 4 (2022); 135-155]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v7i4]]>
Laboratory of Signals and Systems, Algeria]]>
2023-01-14]]>
Copyright (c) 2022 Djamila Talah, Hamid Bentarzi]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/175/150]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/175]]>
10.51485/ajss.v7i4.175]]>
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var str = 'Simple Control Method for Unified Power Quality based on Five-level Inverter Topologies Operating under all Voltage Disturbances';
document.write(linkifyHtml(str, options));
]]>
Five-level (NPC) inverter, UPQC, Voltage disturbance compensation, Power quality improvement, Total Harmonic Distortion (THD)]]>
This paper proposes a simple control scheme for UPQC (Unified Power Quality Conditioner) system based on five-level NPC (Neutral Point Clamped) inverter capable to compensate all disturbances under all voltage conditions. The proposed UPQC is designed by the integration of shunt and series APFs (Active Power Filters) sharing a common dc bus capacitor. The dc voltage is maintained constant using proportional integral voltage controller. To get the reference signals for shunt and series APFs, synchronous current detection method (SCD) and instantaneous reactive power (PQ) strategies are adopted. These reference signals are derived from the control algorithm and injected in LS-SPWM (Level Shifted-Sin Pulse Width Modulation) controllers to generate the switching signals. The performance of proposed UPQC system is evaluated using MATLAB-Simulink software and SimPowerSystem Toolbox for all voltage disturbances compensation. The simulation results demonstrate the effectiveness of proposed UPQC system to improve the power quality at the common connection point of the non-linear load in steady and transient conditions operation.]]>
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var str = 'CHENNAI, Salim';
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]]>
Algerian Journal of Signals and Systems ; Vol. 7 No. 4 (2022); 170-177]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v7i4]]>
Laboratory of Signals and Systems, Algeria]]>
2023-01-14]]>
Copyright (c) 2022 Salim CHENNAI]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/171/153]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/171]]>
10.51485/ajss.v7i4.171]]>
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var str = 'Accident sequences Analysis in a NPP's Electrical System Model using Event Tree Method';
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]]>
Probabilistic safety assessment]]>
Nuclear power plant]]>
Electrical power system]]>
Event tree]]>
Fault tree]]>
Accident scenarios]]>
Initiating event]]>
This paper analyzes the logical accident scenarios in an electrical system model of a nuclear power plant (NPP) using the coupling of fault tree and event tree analysis methods. An Emergency Power Supply System (EPSS) Benchmark of an NPP is used for validation. The safety functions of the EPSS are identified and their failure probabilities are calculated using fault tree method. The obtained results provide various accident sequences triggered by the loss of the main electric connection of the EPSS and their occurrence frequencies. This methodology ensures an efficient sorting of various accident sequences according to their occurrence frequency and end sates.]]>
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var str = 'Benabid, Rabah';
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]]>
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var str = 'Dallal KEMIKEM';
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]]>
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var str = 'Djamel Fennouch';
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]]>
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var str = 'Boussaad MOHAMMEDI';
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]]>
Algerian Journal of Signals and Systems ; Vol. 7 No. 4 (2022); 164-169]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v7i4]]>
Laboratory of Signals and Systems, Algeria]]>
2023-01-14]]>
Copyright (c) 2022 Rabah Benabid, Dallal KEMIKEM, Djamel Fennouch, Boussaad MOHAMMEDI]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/170/152]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/170]]>
10.51485/ajss.v7i4.170]]>
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var str = 'Synthesis of ADRC and its Application to an Electrical Power System';
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]]>
ADRC]]>
Power Grid]]>
AVR]]>
Active Distribution Network.]]>
As the power system becomes smarter, the difficulty of control is also increasing. Since, load frequency and voltage stability is an important power quality index in power system, any sudden load disturbance will cause the system load frequency and voltage deviation, and as the power system becomes more complex. However, the stability and reliability of the smart power grid are facing great challenges caused by the intermittency and randomness of renewable energies. Nowadays, it is necessary to find a more appropriate control strategy and techniques. Due to the superior anti-interference and anti-coupling ability of the active disturbance rejection control (ADRC), novel applications of this control technique have been developed in smart system. This paper presents firstly a synthesis of ADRC and then it discusses some important applications of ADRC in this field.]]>
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var str = 'Ahcene, Fazia';
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]]>
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var str = 'Bentarzi, Hamid';
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]]>
Algerian Journal of Signals and Systems ; Vol. 7 No. 3 (2022): AJSS; 122-134]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v7i3]]>
Laboratory of Signals and Systems, Algeria]]>
2022-09-30]]>
Copyright (c) 2022 Fazia Ahcene, Hamid Bentarzi]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/168/148]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/168]]>
10.51485/ajss.v7i3.168]]>
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var str = 'Hybrid Renewable Energy System Optimization using iHOGA';
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]]>
HRES]]>
Sizing]]>
Techno-economic Study]]>
iHOGA]]>
Electrical energy is considered to be the heart of modern civilization. Traditional electricalenergy generation approaches which usually rely on oil and its derivatives, produce different kinds of pollution in addition to being expensive to implement and maintain. And most important, they are exhaustible on the long run. The sun is an unlimited source of energy for humanity around the world and a competitive energy with strong potential. The solar systems technology offers a promising method for the large scale use of solar energy in the southern zone of Algeria. The magnitude of solar radiation is the most important parameter for sizing these systems. This study presents a techno-economic feasibility evaluation for an installation of a stand-alone PV system which covers the electric demand of 20 houses in the province of Tindouf located in the South-West of Algeria. The aim is to select the appropriate components and see the results of the simulation using the hybrid simulator iHOGA, which include the total cost, CO2 emissions and their impact on the environment.]]>
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var str = 'Recioui, Abdelmadjid';
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]]>
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var str = 'Benaissa, Narimene';
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]]>
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var str = 'Dekhandji, Fatma Zohra';
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]]>
Algerian Journal of Signals and Systems ; Vol. 7 No. 3 (2022): AJSS; 99-108]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v7i3]]>
Laboratory of Signals and Systems, Algeria]]>
2022-09-30]]>
Copyright (c) 2022 Abdelmadjid Recioui, Narimene Benaissa, Fatma Zohra Dekhandji]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/167/149]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/167]]>
10.51485/ajss.v7i3.167]]>
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var str = 'Unified Power Quality Conditioner Performance based on Multi-level Inverter Topologies using Intelligent Controllers';
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]]>
Three-level (NPC) inverter]]>
UPQC]]>
Fuzzy logic]]>
Artificial neural network]]>
Voltage disturbance compensation]]>
Power quality improvement]]>
Total Harmonic Distortion (THD)]]>
This paper presents unified power quality conditioner (UPQC) system based on three-level neutral point clamped (NPC) using Fuzzy and ANN controllers. The proposed UPQC is able to mitigate source current harmonics and compensate all voltage disturbances. It is designed by the integration of series and shunt active filters (AFs) sharing a common DC bus capacitor. The DC voltage is maintained constant using proportional integral voltage controller. The synchronous reference frame (SRF) theory is used to get the reference signals for the shunt APF and the power reactive theory (P-Q theory) for the series APF.Conventional control schemes require complex calculations, the use of intelligent systems help to reduce the control system size and the operation complexity. The shunt and series active power filter (APF) reference signals derived from the control algorithm are injected in Fuzzy and Ann intelligent controllers to generate switching signals. The performances of the proposed UPQC system are evaluated using Matlab-Simulink software and SimPowerSystem Toolbox under various operation conditions. The simulation results show the performance of the proposed UPQC based on intelligent controllers to improve the power quality in steady and transient conditions operation.]]>
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var str = 'CHENNAI, Salim';
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]]>
Algerian Journal of Signals and Systems ; Vol. 7 No. 3 (2022): AJSS; 109-116]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v7i3]]>
Laboratory of Signals and Systems, Algeria]]>
2022-09-30]]>
Copyright (c) 2022 Salim CHENNAI]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/166/147]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/166]]>
10.51485/ajss.v7i3.166]]>
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var str = 'Triple band Quasi-Yagi Antenna for Mutiband Applications';
document.write(linkifyHtml(str, options));
]]>
Quasi-Yagi Antenna, Multiband Antenna and CPW]]>
This paper presents a simple and compact quasi-yagi antenna for multiband applications. The antenna consisting of a multistrip quasi-yagi element and a coplanar waveguide to coplanar fed line, the antenna operates in three different frequency bands, namely 3.2, 4.35, and 10.5 GHz. drivers are built with a symmetrical structure based on the classic dipole configuration. The antenna structure design and its multi-band nature with effective radiation make it a good candidate for multi-band applications.]]>
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var str = 'fertas, fouad';
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]]>
Algerian Journal of Signals and Systems ; Vol. 7 No. 3 (2022): AJSS; 94-98]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v7i3]]>
Laboratory of Signals and Systems, Algeria]]>
2022-09-30]]>
Copyright (c) 2022 fouad fertas]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/165/144]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/165]]>
10.51485/ajss.v7i3.165]]>
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var str = 'Transient Simulation of an Industrial Steam Boiler';
document.write(linkifyHtml(str, options));
]]>
Industrial Steam boiler]]>
Safety]]>
Modeling and simulation]]>
Relap5]]>
Steady-state validation]]>
Tube rupture transient]]>
The safety analysis of an industrial installation is extensively based on modeling and simulation. However, the analysis of simulation using realistic computer codes like RELAP5/Mod3.2 will help understand thermal-hydraulic behavior of an installation during normal and accidental conditions. In a steam boiler operation, it is very important to evaluate numerous accident scenarios under real plant conditions. One of the main accidental transients is tube rupture of steam boiler. The main objective of this study consists toinvestigate the behavior of an industrial steam boiler installed in the complex of natural gas liquefaction (LNG) at Skikda in Algeria during feed water line break accident. A RELAP5 model was set up to simulate the entire system, the model represents all steam boiler components to be suitable for the analysis of the several accidents. The control and regulation systems are also considered. The model was qualified against the steam boiler data at steady-state conditions. As seen from the results, a good agreement was obtained. The transient simulation results show that the thermal-hydraulic code correctly predicts the behavior of the main steam boiler parameters and how the control system, when required, can successfully mitigate the accident.]]>
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var str = 'Deghal Cheridi, Amina Lyria';
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]]>
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var str = 'Dadda , Amel';
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]]>
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var str = 'Bouam , Abdellah';
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]]>
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var str = 'Dahia , Ahmed';
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]]>
Algerian Journal of Signals and Systems ; Vol. 7 No. 2 (2022): AJSS; 77-83]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v7i2]]>
Laboratory of Signals and Systems, Algeria]]>
2022-06-30]]>
Copyright (c) 2022 Amina Lyria Deghal Cheridi, Amel Dadda , Abdellah Bouam , Ahmed Dahia]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/164/143]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/164]]>
10.51485/ajss.v7i2.164]]>
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var str = 'Risk Assessment of an LNG Storage Tank Release: Case study of LNG storage unit in Skikda LNG terminal';
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]]>
LNG terminal]]>
LNG storage tank]]>
HAZOP]]>
Bowtie analysis]]>
Fault tree analysis]]>
ALOHA]]>
LOC]]>
Liquefied natural gas (LNG) terminals ensure the production, storage, and transportation of LNG. Therefore, it assembles critical equipment that can cause hazards to personnel, assets, and the environment. This paper presents a risk assessment for an LNG storage tank release in an LNG terminal. Risk assessment was conducted by applying a HAZOP study, Bowtie analysis, fault tree analysis, and ALOHA (Areal Locations of Hazardous Atmospheres) simulation. The results were to identify causes, consequences, and safeguards of hazards related to over and under pressure in an LNG storage tank. Moreover, a bowtie analysis was established for LNG loss of containment (LOC) from flammable liquids storage tanks. In addition, a fault tree analysis was presented to identify the causes of tank failure considering pressure hazards. Finally, the consequences of LNG released from the storage tank are simulated using the ALOHA software]]>
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var str = 'CHEBLI , Sarra';
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var str = 'TOLBA , Chérif';
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var str = 'ZENNIR , Youcef';
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Algerian Journal of Signals and Systems ; Vol. 7 No. 2 (2022): AJSS; 53-60]]>
2676-1548]]>
2543-3792]]>
10.51485/ajss.v7i2]]>
Laboratory of Signals and Systems, Algeria]]>
2022-06-30]]>
Copyright (c) 2022 Sarra CHEBLI , Chérif TOLBA , Youcef ZENNIR]]>
https://creativecommons.org/licenses/by-nc/4.0]]>
https://ajss.dz/index.php/ajss/article/view/162/139]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
Peer-reviewed Article]]>
https://ajss.dz/index.php/ajss/article/view/162]]>
10.51485/ajss.v7i2.162]]>