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Influence of the Parasitic External Electromagnetic Field on the Efficiency of a Photovoltaic System
El-Khanssa Kechar,El-Bahi Azzag,Abdelhamid Ksentini 한국전기전자재료학회 2019 Transactions on Electrical and Electronic Material Vol.20 No.5
The aim of this work is to study the eff ect electromagnetic disturbances issued from high voltage–power stations of a given power on the performance of photovoltaic panels placed at diff erent distances from sources emitting electromagnetic radiation the tests were carried out under real conditions in the region of Annaba for a power line 400 kV high voltage connecting to Ramdane Djamel to Cheffi a, the obtained results allowed analyzing the current–voltage, power–voltage characteristics in the presence of the electromagnetic fi eld. For a better characterization of the photovoltaic generators, we study the electrical power delivers by the photovoltaic generators to an external charge and we deduce the conversion effi ciency of the photovoltaic system with a maximum power point tracking command for 09 h depending on the intensity of the electromagnetic field. The experimental results make it possible to check the infl uence of parasitic radiation on the photovoltaic system with the proposed controller.
Yasmine-Derdour, Yasmine-Derdour,Bouabdellah-Kechar, Bouabdellah-Kechar,Faycal-Khelfi, Mohammed Korea Information Processing Society 2016 Journal of information processing systems Vol.12 No.2
A primary task in wireless sensor networks (WSNs) is data collection. The main objective of this task is to collect sensor readings from sensor fields at predetermined sinks using routing protocols without conducting network processing at intermediate nodes, which have been proved as being inefficient in many research studies using a static sink. The major drawback is that sensor nodes near a data sink are prone to dissipate more energy power than those far away due to their role as relay nodes. Recently, novel WSN architectures based on mobile sinks and mobile relay nodes, which are able to move inside the region of a deployed WSN, which has been developed in most research works related to mobile WSN mainly exploit mobility to reduce and balance energy consumption to enhance communication reliability among sensor nodes. Our main purpose in this paper is to propose a solution to the problem of deploying mobile data collectors for alleviating the high traffic load and resulting bottleneck in a sink's vicinity, which are caused by static approaches. For this reason, several WSNs based on mobile elements have been proposed. We studied two key issues in WSN mobility: the impact of the mobile element (sink or relay nodes) and the impact of the mobility model on WSN based on its performance expressed in terms of energy efficiency and reliability. We conducted an extensive set of simulation experiments. The results obtained reveal that the collection approach based on relay nodes and the mobility model based on stochastic perform better.
Bendimerad, Nawel,Kechar, Bouabdellah Korea Information Processing Society 2015 Journal of information processing systems Vol.11 No.4
Wireless Video Sensor Networks (WVSNs) have become a leading solution in many important applications, such as disaster recovery. By using WVSNs in disaster scenarios, the main goal is achieving a successful immediate response including search, location, and rescue operations. The achievement of such an objective in the presence of obstacles and the risk of sensor damage being caused by disasters is a challenging task. In this paper, we propose a fault tolerance model of WVSN for efficient post-disaster management in order to assist rescue and preparedness operations. To get an overview of the monitored area, we used video sensors with a rotation capability that enables them to switch to the best direction for getting better multimedia coverage of the disaster area, while minimizing the effect of occlusions. By constructing different cover sets based on the field of view redundancy, we can provide a robust fault tolerance to the network. We demonstrate by simulating the benefits of our proposal in terms of reliability and high coverage.
( Nawel Bendimerad ),( Bouabdellah Kechar ) 한국정보처리학회 2015 Journal of information processing systems Vol.11 No.4
Wireless Video Sensor Networks (WVSNs) have become a leading solution in many important applications, such as disaster recovery. By using WVSNs in disaster scenarios, the main goal is achieving a successful immediate response including search, location, and rescue operations. The achievement of such an objective in the presence of obstacles and the risk of sensor damage being caused by disasters is a challenging task. In this paper, we propose a fault tolerance model of WVSN for efficient post-disaster management in order to assist rescue and preparedness operations. To get an overview of the monitored area, we used video sensors with a rotation capability that enables them to switch to the best direction for getting better multimedia coverage of the disaster area, while minimizing the effect of occlusions. By constructing different cover sets based on the field of view redundancy, we can provide a robust fault tolerance to the network. We demonstrate by simulating the benefits of our proposal in terms of reliability and high coverage.
( Yasmine Derdour ),( Bouabdellah Kechar ),( Mohammed Faycal Khelfi ) 한국정보처리학회 2016 Journal of information processing systems Vol.12 No.2
A primary task in wireless sensor networks (WSNs) is data collection. The main objective of this task is to collect sensor readings from sensor fields at predetermined sinks using routing protocols without conducting network processing at intermediate nodes, which have been proved as being inefficient in many research studies using a static sink. The major drawback is that sensor nodes near a data sink are prone to dissipate more energy power than those far away due to their role as relay nodes. Recently, novel WSN architectures based on mobile sinks and mobile relay nodes, which are able to move inside the region of a deployed WSN, which has been developed in most research works related to mobile WSN mainly exploit mobility to reduce and balance energy consumption to enhance communication reliability among sensor nodes. Our main purpose in this paper is to propose a solution to the problem of deploying mobile data collectors for alleviating the high traffic load and resulting bottleneck in a sink’s vicinity, which are caused by static approaches. For this reason, several WSNs based on mobile elements have been proposed. We studied two key issues in WSN mobility: the impact of the mobile element (sink or relay nodes) and the impact of the mobility model on WSN based on its performance expressed in terms of energy efficiency and reliability. We conducted an extensive set of simulation experiments. The results obtained reveal that the collection approach based on relay nodes and the mobility model based on stochastic perform better.