Integrated Offshore Wind and Wave Energy: Dynamic Interactions and Economic Potential of Hybrid Systems

Abstract Renewable energy is vital for achieving a zero-carbon future, with offshore wind and wave energy offering high potential due to their abundance and low environmental impact. While offshore wind is mature, wave energy remains an emerging complementary resource. Integrating both into a hybrid system could enhance power generation, reduce costs, and utilize infrastructure efficiently. This study investigates a hybrid system combining a floating offshore wind turbine with a heaving point absorber wave energy converter. As case studies, we consider the NREL 5MW and IEA 15MW wind turbines and the RM3 wave energy converter, along with spar and semi-submersible platforms. Key factors like platform stability, dynamic response, mooring loads, and power production are examined, focusing on how wave energy converter motion and a reaction plate affect performance. The reaction plate improves spar stability, enhancing energy absorption and output. Results show a 38% reduction in the levelized cost of energy for the wave energy converter when integrated with the wind turbine, without increasing the wind turbine’s costs. This highlights the economic viability of hybrid systems. Further analysis will assess hydrodynamic responses, mooring tensions, annual energy production, and cost-benefit implications. The findings provide insights for optimizing hybrid offshore renewable energy systems, supporting sustainable energy goals with cost-effective solutions.