Project Outline

This research and development project aims to develop integrated load analysis and dynamic cable design technologies for floating offshore wind systems. The objective is to establish technologies capable of performing fully coupled analyses of the entire system, including floating wind turbines, mooring systems, inter-array dynamic power cables, and export dynamic power cables, and to define design criteria and analysis procedures incorporating structural, hydrodynamic, and fatigue analyses.

Through this work, the dynamic behavior and fatigue performance of 66 kV inter-array cables and 154 kV export cables will be quantitatively evaluated. In addition, optimal design technologies for floating offshore substations and power cable layouts will be developed. Ultimately, the project aims to secure core enabling technologies applicable to the demonstration and commercial deployment phases of floating offshore wind projects.

Technical Features of the Technology Development

Integrated Load Analysis–Based Design Technology for Floating Offshore Wind

This research focuses on the development of an integrated load analysis technology for floating offshore wind systems, encompassing wind turbines, floating platforms, mooring systems, and dynamic power cables. The technology accounts for the coupled behavior arising from the interaction of aerodynamic loads, wave loads, current loads, and structural responses, enabling accurate load assessment and structural stability evaluation under realistic offshore environmental conditions.

By incorporating these fully coupled aero-hydro-structural effects, the proposed approach supports high-fidelity analysis and design of floating offshore wind systems, contributing to improved reliability and safety in engineering applications.

Design and Analysis of Inter-array and Export Cables

This study develops technologies for the dynamic behavior analysis and fatigue life assessment of dynamic power cables subjected to repeated bending and tensile loads induced by the motions of floating wind turbines. The scope includes both inter-array cables and export cables. Fatigue damage accumulation is evaluated from a system-level perspective, encompassing not only the cable body itself but also critical components such as end fittings and the connections to floating structures, thereby ensuring the overall reliability and robustness of the cable design.

Cable Layout Optimization and Establishment of Design Criteria

For 66 kV-class inter-array dynamic power cables and 154 kV-class (and higher) export cables, this study performs optimal cable layout design within floating offshore wind farms. By comprehensively considering cable routing, curvature, water depth variations, and floating structure motions. optimal design solutions are derived that simultaneously satisfy installation feasibility, operational performance, and long-term fatigue durability.

Standardization and Design Framework Development for Demonstration Projects

By systematically reviewing international offshore wind design standards (DNV, ABS, IEC, etc.) and existing research outcomes, this study establishes applicable technical guidelines for the design of floating offshore wind systems and dynamic power cables. The developed analysis and design technologies are intended to be applied to future demonstration and commercial projects, thereby contributing to the enhancement of technological competitiveness in the domestic floating offshore wind industry.