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Group of Safety, Reliability and Maintenance > 5.7 Economic and Technological Analysis of Maritime Clusters > Publications
Ramos-Marin, S. and Guedes Soares, C. (2025), Multi-objective optimization for hybrid electric system setup in a remote island, Journal of Ocean Engineering and Marine Energy, Vol. 11, 885-908.
This paper assesses the optimal configurations of a hybrid electric system, including different forms of marine renewable energy. The efficiency of three multi-objective optimisation approaches - Multi-objective Pareto Search, Multi-Objective Genetic Algorithm (MOGA) and a hybrid MO-GA is evaluated and compared when used to delimit the Pareto front of optimal trade-off configurations, balancing between a low environmental impact and a cost-effective system. The approach is applied to the electric market of Porto Santo Island (Portugal), where existing conventional and renewable electricity generation plants (thermoelectric, onshore wind and solar PV) have been examined together with other forms of marine energy (waves and offshore wind). Various linear and non-linear functions constrain the optimisation. Results point to a system dimensioned with a 63% share of renewable energies (Res), as the optimal configuration with the cheapest electric generation cost (3.7 M€/year), in a trade-off of the highest environmental impact. The lowest environmental impact is linked to a system wholly composed of RE sources, although it is also associated with the most expensive cost of electricity (4.6 M€/year). Overall, configurations in the Pareto optima present higher installed capacities of offshore wind technology, followed sequentially by lower penetrations of onshore wind, thermoelectric, WEC and solar PV energies.
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