Numerical Analysis and Review of Taut-Leg and Compliant Mooring Systems for Floating Photovoltaic Systems

Abstract This paper comprehensively investigates the motions and dynamic loading conditions experienced by a floating photovoltaic (PV) system. The analysis aims to enhance the management of the loads exerted on the floating structures, while simultaneously identifying various factors that could improve the efficiency of solar energy capture. The floating photovoltaic system comprises modular rafts strategically designed to accommodate varying water depths through the mooring lines. This adaptability is crucial for optimizing energy production under different environmental conditions. A time-domain simulation is employed to accurately evaluate the system’s behavior, utilizing a multi-body dynamic approach. This methodology allows for a nuanced assessment of how the floating solar structure responds to meteoceanographic loads defined by Eurocode guidelines [1]. Two distinct mooring line systems — taut-leg and compliant configurations — are analyzed in detail to determine the most effective arrangement for minimizing dynamic loads. The results indicate that the compliant mooring setup significantly reduces the maximum tension experienced within the lines compared to the taut-leg system. This reduction in tension contributes to improved structural integrity and represents a favorable alternative that could lead to enhanced performance and longevity of the floating photovoltaic installation.