Load and fatigue evaluation for 66kV floating offshore wind submarine dynamic power cable

Abstract

Floating Offshore Wind technology has seen a number of prototype deployments around the world in recent years. One of the critical components that must maintain the highest possible integrity is the dynamic power cable. This paper presents the approach and applied methods for the design work that informs the development and qualification of a 66kV submarine dynamic power cable. The design envelope is quantified through coupled aero-hydrodynamic modelling, determining the ultimate load conditions for different cable configurations. The model sensitivity and convergence for an OC4 floating design are explored regarding metocean conditions, computational parameters. A lowered Lazy Wave cable configuration is chosen as most suitable design, providing a compromise between hang-off tensions and induced bending stresses. The numerical results form the basis for subsequent physical cable demonstration and validation tests.