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Optimized energy management strategy for grid connected double storage (pumped storage-battery) system powered by renewable energy resources
Egypt Japan Univ Sci & Technol, Energy Resources Eng Dept, Alexandria, Egypt.;Assiut Univ, Fac Engn, Elect Engn Dept, Assiut, Egypt..
Mälardalen University, School of Business, Society and Engineering, Future Energy Center. AGH Univ Sci & Technol, Fac Management, Dept Eng Management, Krakow, Poland..ORCID iD: 0000-0001-9576-7877
Egypt Japan Univ Sci & Technol, Energy Resources Eng Dept, Alexandria, Egypt.;Assiut Univ, Fac Engn, Mech Engn Dept, Assiut, Egypt..
Assiut Univ, Fac Engn, Elect Engn Dept, Assiut, Egypt.;Egypt Japan Univ Sci & Technol, Dept Mechatron & Robot Engn, Alexandria, Egypt..
2020 (English)In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 192, article id 116615Article in journal (Refereed) Published
Abstract [en]

This paper presents a grid-connected double storage system (DSS) consisting of pumped-storage hydropower (PSH) and battery. The system is supplied by photovoltaics and wind turbines. In the proposed hybrid system, batteries absorb excess renewable energy that cannot be stored in PSH and they cover loads that cannot be supplied from the water turbine. To improve the system performance, a novel energy management strategy for the DSS is proposed. The strategy is based on an optimized factor that governs the charging process of the DSS. The problem of the optimal system design is solved by a non-dominated sorting genetic algorithm (NSGA-II). The multi-objective function considers simultaneously the minimal investment cost and minimal CO2 emissions. A comparative study of photovoltaic/wind/pumped-storage hydropower and photovoltaic/wind/double storage system is performed to show the effectiveness of the proposed strategy in terms of system economic and environmental performance. The considered location of the PSH station is on Attaqa Mountain at Suez (Egypt). The results indicate the effectiveness of the proposed energy management strategy for the storage system from economic and environmental perspectives. Coupling the battery with the PSH reduces the electricity cost by 22.2% and results in minimal energy exchange with the national grid (5% of the annual demand). A sensitivity analysis shows the largest variation of the electricity cost with changing the capital cost of the solar and wind generators. Also, it is observed that when the load increases, the optimal size of the system components increases, but it isn't proportional with the demand increase as could be expected. (C) 2019 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2020. Vol. 192, article id 116615
Keywords [en]
Pumped-storage hydropower, Battery, Double storage system, Renewable energy sources, NSGA-II, Hybrid energy system
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-58641DOI: 10.1016/j.energy.2019.116615ISI: 000515212800050Scopus ID: 2-s2.0-85076305239OAI: oai:DiVA.org:mdh-58641DiVA, id: diva2:1665906
Available from: 2022-06-08 Created: 2022-06-08 Last updated: 2023-09-13Bibliographically approved

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Jurasz, Jakob

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