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  • 1.
    Guezgouz, M.
    et al.
    Department of Electrical Engineering, Mostaganem University, Mostaganem, Algeria.
    Jurasz, Jakob
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Faculty of Management, Department of Engineering Management, AGH University.,Cracow, Poland.
    Bekkouche, B.
    Department of Electrical Engineering, Mostaganem University, Mostaganem, Algeria.
    Ma, T.
    School of Mechanical Engineering, Shanghai Jiao Tong University, China.
    Javed, M. S.
    School of Mechanical Engineering, Shanghai Jiao Tong University, China.
    Kies, A.
    Frankfurt Institute for Advanced Studies, Goethe University Frankfurt, Frankfurt am Main, Germany.
    Optimal hybrid pumped hydro-battery storage scheme for off-grid renewable energy systems2019Ingår i: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 199, artikel-id 112046Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The development of energy storage systems paves the way towards a high integration of renewable energy sources in the electricity generation sector. Considering above, this paper introduces a new energy management strategy to efficiently coordinate a hybrid energy storage system based on pumped hydro storage (long term bulk storage) with batteries (short term, more flexible). For the purpose of this analysis, hourly time series of irradiation, wind speed, temperature and real measured load (characteristic for farmstead) covering one year were gathered for the selected site in Algeria. The optimal size of the system is determined based on a multi-objective optimization using a grey wolf optimizer implemented in MATLAB software. The results indicate that the hybrid storage system enables achieving higher reliability at lower cost in comparison to a system with single storage technology. The use of hybrid storage also reduces the curtailment of renewable generation. Further findings reveal that the cost of an optimal energy supply system with 97.5% reliability is 0.162 €/kWh, 0.207 €/kWh and 1.462 €/kWh for hybrid storage, battery and pumped storage, respectively. However, sensitivity analysis shows that the optimal hybrid storage configuration is less resilient when changes in irradiation/temperature/load are considered. This indicates that special actions (upscale of installed power) must be undertaken to avoid lower performance of hybrid storage systems. In summary, the hybrid storage system seems to be better sized for consideration in optimized solar/wind conditions, but by avoiding oversizing they are less resilient to future potential changes in renewable energy availability.

  • 2.
    Guezgouz, M.
    et al.
    Mostaganem University, Algeria.
    Jurasz, Jakub
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. AGH University of Science and Technology, Cracow, Poland.
    Bekkouche, B.
    Mostaganem University, Algeria.
    Techno-economic and environmental analysis of a hybrid PV-WT-PSH/BB standalone system supplying various loads2019Ingår i: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 12, nr 3, artikel-id 514Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The Algerian power system is currently dominated by conventional (gas- and oil-fueled) power stations. A small portion of the electrical demand is covered by renewable energy sources. This work is intended to analyze two configurations of renewables-based hybrid (solar–wind) power stations. One configuration was equipped with batteries and the second with pumped-storage hydroelectricity as two means of overcoming: the stochastic nature of the two renewable generators and resulting mismatch between demand and supply. To perform this analysis, real hourly load data for eight different electricity consumers were obtained for the area of Mostaganem. The configuration of hybrid power stations was determined for a bi-objective optimization problem (minimization of electricity cost and maximization of reliability) based on a multi-objective grey-wolf optimizer. The results of this analysis indicate that, in the case of Algeria, renewables-based power generation is still more expensive than electricity produced from the national grid. However, using renewables reduces the overall CO 2 emissions up to 9.3 times compared to the current emissions from the Algerian power system. Further analysis shows that the system performance may benefit from load aggregation. 

  • 3.
    Jurasz, Jakob
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Faculty of Management, Department of Engineering Management, AGH University, Cracow, Poland.
    Canales, F. A.
    Department of Civil and Environmental, Universidad de la Costa, Barranquilla, Atlántico, Colombia.
    Kies, A.
    Frankfurt Institute for Advanced Studies, Goethe University Frankfurt, Frankfurt am Main, Germany.
    Guezgouz, M.
    Department of Electrical Engineering, Mostaganem University, Mostaganem, Algeria.
    Beluco, A.
    Instituto de Pesquisas Hidráulicas, Universidade Federal do Rio Grande do Sul, Brazil.
    A review on the complementarity of renewable energy sources: Concept, metrics, application and future research directions2020Ingår i: Solar Energy, ISSN 0038-092X, E-ISSN 1471-1257, Vol. 195, s. 703-724Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    Global and regional trends indicate that energy demand will soon be covered by a widespread deployment of renewable energy sources. However, the weather and climate driven energy sources are characterized by a significant spatial and temporal variability. One of the commonly mentioned solutions to overcome the mismatch between demand and supply provided by renewable generation is a hybridization of two or more energy sources into a single power station (like wind-solar, solar-hydro or solar-wind-hydro). The operation of hybrid energy sources is based on the complementary nature of renewable sources. Considering the growing importance of such systems and increasing number of research activities in this area this paper presents a comprehensive review of studies which investigated, analyzed, quantified and utilized the effect of temporal, spatial and spatiotemporal complementarity between renewable energy sources. The review starts with a brief overview of available research papers, formulates detailed definition of major concepts, summarizes current research directions and ends with prospective future research activities. The review provides a chronological and spatial information with regard to the studies on the complementarity concept.

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