Presentation Description: The Ultraflexible Smart Floating Offshore Wind Turbine (USFLOWT) is a project funded under the U.S. ARPA-E’s ATLANTIS program that seeks to reduce floating offshore wind LCOE via the innovative platform SpiderFLOAT designed with a control-co-design (CCD) approach.
The SpiderFLOAT (SF) substructure was conceived to enable CCD optimization including smart control systems for mass minimization, system stability, and performance. The components of the substructure are fully modular and designed for ease of manufacturing (through a combination of local-content prefab and onsite manufacturing), transport, and installation. The low fixity level of the joints transfers minimum bending loads among the members, thus reducing demand on structural resistance, and allowing for tunable system hydrodynamic stiffness. Rather than responding to the waves as a rigid unit, SF's compliant members can have individual dynamics, thus can mitigate wave hydrodynamic forces and damp unwanted energy with only a reduced portion transferred to the RNA and tower. Compared to currently deployed heavy and stiff floaters of Oil-and-Gas derivation, SF's innovative ultracompliant and slender approach becomes evident. However, this ultra-flexible layout gives rise to complex dynamics and therefore requires a robust control system to maintain stability and performance. In this talk, we highlight the innovative characteristics of the system, including structural aspects of the design methodology and control optimization aspects.
Demonstrate how the role of controls in a revolutionary floating platform can help reduce mass of the platform and costs.
Describe how an innovative analytical implementation can support the design optimization of the floating substructure.
Describe key aspects of the design of a floater wind turbine that controls must be tuned to achieve.