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Boztepe M.,Ege University | Guinjoan F.,Polytechnic University of Catalonia | Velasco-Quesada G.,Polytechnic University of Catalonia | Silvestre S.,Polytechnic University of Catalonia | And 2 more authors.
IEEE Transactions on Industrial Electronics | Year: 2014

String inverter photovoltaic (PV) systems with bypass diodes require improved global maximum power point tracking (GMPPT) algorithms to effectively reach the absolute maximum power operating point. Several GMPPT algorithms have been proposed to deal with this problem, but most of them require scanning wide voltage ranges of the PV array from nearly zero voltage to open-circuit voltage that increases the scanning time and, in turn, causes energy loss. This paper presents a novel GMPPT method which significantly restricts the voltage window search range and tracks the global power peak rapidly in all shading conditions. Simulation tests and experimental comparisons with another GMPPT algorithm are presented to highlight the features of the presented approach. © 1982-2012 IEEE. Source

Bakelli Y.,Applied Research Unit on Renewable Energies URAER | Hadj Arab A.,Center for Development of Renewable Energies (CDER) | Azoui B.,University of Batna
Solar Energy | Year: 2011

This paper recommends an optimal sizing model, to optimize the capacity sizes of different components of photovoltaic water pumping system (PWPS) using water tank storage. The recommended model takes into account the submodels of the pumping system and uses two optimization criteria, the loss of power supply probability (LPSP) concept for the reliability and the life cycle cost (LCC) for the economic evaluation. With this presented model, the sizing optimization of photovoltaic pumping system can be achieved technically and economically according to the system reliability requirements. The methodology adopted proposes various procedures based on the water consumption profiles, total head, tank capacity and photovoltaic array peak power. A case study is conducted to analyze one photovoltaic pumping project, which is designed to supply drinking water in remote and scattered small villages situated in Ghardaia, Algeria (32°29′N, 3°40′E, 450. m). © 2010 Elsevier Ltd. Source

Larbi S.,Polytechnic School of Algiers | Bouhdjar A.,Center for Development of Renewable Energies (CDER) | Chergui T.,Applied Research Unit on Renewable Energies URAER
Renewable and Sustainable Energy Reviews | Year: 2010

In this paper, we present the performance analysis of a solar chimney power plant expected to provide the remote villages located in Algerian southwestern region with electric power. Solar energy and the psychometric state of the air in the south of Algeria are important to encourage the full development of solar chimney power plant for the thermal and electrical production of energy for various uses. We are interested in Adrar where solar radiation is better than other areas of Algeria. The obtained results show that the solar chimney power plant can produce from 140 to 200 kW of electricity on a site like Adrar during the year, according to an estimate made on the monthly average of sunning. This production is sufficient for the needs of the isolated areas. © 2009 Elsevier Ltd. All rights reserved. Source

Bouzidi B.,Center for Development of Renewable Energies (CDER)
Renewable and Sustainable Energy Reviews | Year: 2011

The availability of water and the ability to access are the key questions arising in developing countries including Algeria. Indeed, due to lack of electricity, the Saharan regions representing 80% of the country are facing major problems to cover drinking water needs. Paradoxically, there is in some of these areas an important quantity of groundwater at shallow depths. On the other hand, Algeria has considerable renewable energy resources, particularly solar and wind energy options that are now relevant solutions to this problem. To date, few facilities specifically photovoltaic were conducted throughout the national territory (Saharan regions and highlands). However vandalism (destruction, robbery, etc.) did not spare these facilities particularly in border areas, such Adrar, and therefore prospective purchasers of such systems are discouraged. A new strategy to deal these actions became necessary for the regions most affected. In this context, we propose to study and compare the two options for solar and wind water pumping applications in the Adrar region. Because it has become necessary that the energy issue arises in new terms. It is proposed now to ask, taking into account the circumstances, which form of energy would be appropriate for what and for which ends. In other words, we will essentially develop a new spirit, a new attitude that would be based on a determination on a case by case basis, of the appropriate energy resource. This will allow to have another vision of the use and the viability of renewable energies. © 2011 Elsevier Ltd. All rights reserved. Source

Chouder A.,Center for Development of Renewable Energies (CDER) | Silvestre S.,Polytechnic University of Catalonia | Taghezouit B.,Center for Development of Renewable Energies (CDER) | Karatepe E.,Ege University
Solar Energy | Year: 2013

This paper presents a detailed characterization of the performance and dynamic behaviour of photovoltaic systems by using LabVIEW real-time interface system. The developed software tool integrates several types of instruments into a single system which is able to offer online measurements all data sources and comparison simulation results with monitored data in real-time. Comprehensive monitoring and analyzing of PV systems play a very important role. The proposed method is a low-cost solution to provide fast, secure and reliable system by making the system database-ready for performance analysis of PV systems. The proposed method is also applied to a grid connected PV system in the Centre de Developpement des Energies Renouvelables (CDER) in Algeria. The results show that there is a good agreement between the measured and simulation results values. The integration methodology of robust simulation and monitored data in real-time can be extended to study the fault diagnosis of a PV system. © 2012 Elsevier Ltd. Source

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