Power matrix and dynamic response of the hybrid Wavestar-DeepCwind platform under different diameters and regular wave conditions

Power production assessment usually carried out as a power matrix, is essential for the appraisal of wave energy converter (WEC) technologies. This article proposes the hybrid Wavestar-DeepCwind platform, which is composed of Wavestar WEC and a floating wind turbine to evaluate the power matrix under different regular wave conditions and different Wavestar diameters. Firstly, the effects of the Wavestar diameter and power take-off (PTO) damping coefficient on the absorbed power of a single Wavestar placed on the fixed point are investigated using the potential flow-based boundary element method (BEM). Secondly, considering the opti-mum PTO damping coefficient, the effect of Wavestar diameter on the total absorbed power was found. Finally, numerical simulation is extended for different wave periods and wave heights to estimate the total power matrix and the capture width ratio (CWR) matrix under different diameters. According to the numerical results, it is indicated that the maximum absorbed power and maximum CWR are obtained around the wave periods (T = 5s and T = 6s) for all wave heights (H = 1~4m) and Wavestar diameters (D = 5-10m). The heave response of the DeepCwind and three Wavestars (WS1 (or WS3) and WS2) in frequency domains are presented and discussed at various conditions.