On the Optimal Design of Hybrid-Electric Power Systems for Offshore Vessels

Evolution of technology is significantly increasing the presence of hybrid-electric power systems in offshore (support/operation) vessels. They require high dynamic response including dynamic positioning and high levels of reliability and safety. This paper presents a methodology for the optimal design of hybrid-electric power systems for all-electric offshore vessels focused on economic objectives. The methodology is based on the energy modeling of the most promising hybrid-electric power system architectures, as well as the use of an advanced multiobjective optimization technique to obtain the Pareto set of noninferior solutions, corresponding to the best sizing of the energy storage system and energy management strategy. Therefore, modern vessel power systems (ac or dc distribution systems designed around the use of power electronics converters and energy storage systems) can be optimized in terms of fuel consumption, emissions, and capital expenditure/operational expenditure according to the vessel operation modes and power profiles.