Publications Internationales

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Subject: search.filters.subject.Photovoltaic

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    New MPPT hybrid controller based on genetic algorithms and particle swarm optimization for photovoltaic systems
    (2023) Mammeri, Elhachemi; Ahriche, A.; Necaibia, A.; Bouraiou, A.
    Traditional Maximum Power Point Tracking (MPPT) techniques are unable to reach high performance in photovoltaic (PV) system under partial shading conditions because of the multi-peaks present in the Power-Voltage curve. For that, particle Swarm Optimization (PSO) and genetic algorithms (GA) have been combined in recent years. However, these algorithms demonstrate some drawbacks in tracking accuracy and convergence rates, which impair control performance. In this paper, a new controller based on hybridization of PSO and GA is introduced to track the global maximum power point (GMPP). The proposed algorithm (HPGA) increases the balance rate between exploration and exploitation due to the cascade design of GA and PSO. Thus, the GMPP tracking of both algorithms will be improved. Simulations are carried out based on ISOFOTON-75W PV modules to prove the high performance of the proposed algorithm. From the obtained results, we conclude that HPGA shows fast convergence and very good tracking accuracy of GMPP in PV system even under different shading patterns.
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    Performance evaluation of the combined solar chimney-photovoltaic system in Algeria
    (Elsevier, 2021) Kebabsa, Hakim; Lounici, Mohand Said
    The demand for solar energy technologies is increasing due to the growing interest in renewable energy. However, these technologies are affected by atmospheric conditions and low overall efficiency. The present study proposes a combined solar chimney-photovoltaic (SC-PV) system to deal with stand-alone system weaknesses. This work evaluates this self-sustainable system's performance and estimates the electric energy generated under the climatic conditions of Algeria using computational fluid dynamics (CFD). The model is first validated using the Spanish prototype experimental data. The simulations show that the proposed system provides several valuable benefits for improving turbine power, solar cell temperature, and PV efficiency. The results indicate the SC in the combined system performs better turbine generated power than a stand-alone system only for an appropriate PV location and width. Using the heat released from the PV to increase the kinetic energy of airflow beneath the collector, the total improvement in turbine power reaches 8.91%. Similar to the optimal PV widths (10 m), other widths, varying from 20 m to 30 m, increase the overall turbine power without degrading SC performance. Using the SC-PV as a cooling method, the solar cell temperature decreases by 12.12% (6.30 °C) compared with cell temperature in the stand-alone system (52 °C). Accordingly, the PV efficiency increases by 3.23% compared with PV efficiency in the stand-alone system (13.18%). The results also indicate the highly intensive solar radiation region (Adrar) has higher monthly turbine power than other areas. The appropriate areas for building such a system will be in the south of the country, where the solar potential is high. In these regions, the SC-PV could contribute to satisfying the electricity demand
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    Modeling and simulation of hybrid (wind + photovoltaic + battery) power system in south west Algerian site (Bechar)
    (2009) Dahbi, M.; Benatiallah, A.; Benslimane, T.
    The main objectives of the work described in this paper to model and simulate the autonomous hybrid photovoltaic wind generator with battery storage (PV/WG). The more accurate and practical mathematic models for characterizing PV module, wind generator and battery storage are adopted, combining with hourly measured meteorological data and load data. The hourly wind speed, solar radiation and environmental temperature data for the typical day’s in the different seasons recorded at Algerian Meteorological Office of Bechar (South Western of Algeria (31. 38° north latitude, 2. 15° western longitude, and 0.20 albédo)) [1], have been analysed to investigate the potential of utilizing hybrid (PV/ WG) energy conversion systems used to feed with electrical energy a typical rural house at Bechar. The performance of hybrid systems consisting of different rated power wind generator, PV areas and storage battery are presented. The hourly average energy generated for the above hybrid system configuration has been compared with hourly load data of typical house. Simulation is performed in a Matlab software environment