A comparison of two dynamic power cable configurations for a floating offshore wind turbine in shallow water

Abstract

For the study of the double wave configuration for the dynamic power cable of a Floating Offshore Wind Turbine (FOWT) in shallow water, this paper presented a comparison of the hydrostatic and hydrodynamic performance between a lazy wave and a double wave configuration. The double wave shape’s parametric presentation was first developed based on an extension of a previous parametric lazy wave shape. An aero-hydro-servo-elastic integrated model fully coupling the FOWT and the dynamic power cable was then proposed in the SIMO/RIFLEX code for numerical simulation. Subsequently, the strain-cycle curve and the rain flow counting method were employed to estimate the copper conductor’s fatigue damage. The bending moment was proved to provide the major fatigue contribution. The results showed that the double wave offered superior performance than the lazy wave. The second arc of the double wave configuration was proved critical for suffering high curvature, tension, and fatigue damage. A lower position and less hogged wave arc were suggested for the determination of the double wave shape.

Characterization of the Mechanical Properties of Low Stiffness Marine Power Cables through Tension, Bending, Torsion, and Fatigue Testing

“…Fretting and wear damages to the conductors' wires, caused primarily by cyclic bending loads, have been recognized as a challenge for marine cables with metallic armor [18][19][20][21][22][23]. The current study showed that this is also challenging for marine cables without metallic armor.…”

“…They also provide mechanical properties that reduce the risk of structural integrity degradation if appropriately designed, such as fatigue, fretting, and wear caused by cyclic loading conditions from the cable's motions. Many studies in the literature have presented results from numerical simulations and experiments of armored dynamic power cables [18][19][20][21][22][23]. Most of them emphasized bending-induced loading conditions and fatigue experiments since this loading mode causes wear and fretting damage to the cable's parts and components.…”

A Fundamental Study on Inter-Array Cabling Methods Between Two Floating Offshore Wind Turbines in Shallow Waters

“…This approach offers a new perspective on enhancing the efficiency and cost-effectiveness of cable configurations in floating offshore wind farm projects. Zhao et al (2021) conducted a study comparing two dynamic power cable configurations for floating offshore wind turbines in shallow water. Their research compared the hydrostatic and hydrodynamic performance of lazy wave and double wave configurations, utilizing a comprehensive numerical simulation approach.…”

Simulation Study on Methods for Reducing Dynamic Cable Curvature in Floating Wind Power Platforms

“…The cable system serves as the conduit for transmitting electrical energy from the floating platform to the onshore location. Based on its operational conditions, the cable system can be categorized into the static cable end and dynamic cable end [9]. The former primarily refers to conventional submarine cables laid on the seafloor, while the latter is a crucial component of floating offshore wind power platforms, consisting of dynamic cables and their associated accessories [10].…”