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Impact of a Periodic Power Source on a RES Microgrid

Energy Systems Laboratory, National & Kapodistrian University of Athens, 34400 Evia, Greece
Author to whom correspondence should be addressed.
Energies 2019, 12(10), 1900;
Received: 13 April 2019 / Revised: 11 May 2019 / Accepted: 17 May 2019 / Published: 18 May 2019
(This article belongs to the Section Smart Grids and Microgrids)
PDF [2545 KB, uploaded 18 May 2019]


The aim of this article is to highlight the impact of a periodic power source, such as a tidal turbine, on the operation and sizing of an autonomous hybrid microgrid with photovoltaic panels and storage. The technique of hill climbing (repeated local search) is used to find the optimum combination of Renewable Energy Sources (RES) and storage units with respect to the required capital cost for various load curves and weather conditions. To model the operation of the microgrid devices, analytical and phenomenological models, have been used, which take into account the specifications of actual commercial devices. Six different case studies are presented, with and without a tidal generator, which are based on six different sets of electrical consumption data corresponding to the Euripus campus of the National & Kapodistrian University of Athens (NKUA) in Psachna, Evia, Greece, and respective meteorological and tidal current data from the region. The results show that tidal energy may be used in a RES microgrid, where applicable, to satisfy the base load requirements, leading to a reduction in installed capacities of intermittent RES and storage, accompanied with cost reduction, especially in cases where a high load factor is observed or may be achieved, through demand response mechanisms. Such a hybrid microgrid configuration may be appropriate for regions where low velocity tidal and marine currents exist along with substantial solar and/or wind energy potential, such as the Mediterranean coast line and islands. View Full-Text
Keywords: tidal energy; photovoltaics; storage; hill climbing optimization; load factor tidal energy; photovoltaics; storage; hill climbing optimization; load factor

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Angelopoulos, A.; Ktena, A.; Manasis, C.; Voliotis, S. Impact of a Periodic Power Source on a RES Microgrid. Energies 2019, 12, 1900.

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