Optimal Design and Performance Analysis of a Hybrid System Combining a Semi-Submersible Wind Platform and Point Absorbers

Integrating point absorber wave energy converters (PAWECs) and an offshore floating wind platform provide a cost-effective way of joint exploitation. However, the coupled dynamics complicated hybrid system its influence on power performance are not well understood. Here, frequency-domain-coupled hydrodynamics, considering constraints output through relative motion between PAWECs semi-submersible platform, is introduced to optimize size, take-off damping, layout PAWECs. Results show that annual generation PAWEC can be improved by 30% using 90° conical or hemispherical bottom instead flat bottom. Additionally, while letting protrude out sides triangular frame distance 1.5 times radius, total up 18.2% without increasing response platform. The reduce resonant heave due damping force. This study provides reference for synergistic use energy.