| With the rapid consumption of fossil energy,environmental pollution is becoming significantly serious and traditional energy sources are also gradually exhausting.In order to implement the new development concept and ensure that the target of carbon peak and carbon neutrality goals are achieved on schedule,the development and utilization of renewable clean energy is of great significance.The offshore wind and wave energy reserves are very abundant.China’s offshore wind energy reserves about 750 million k W,and the theoretical average power of wave energy along China’s coast is about 12.85 million k W,which has huge development potential.Strong sea winds are usually accompanied by strong waves,the wind and waves combined develop can improve on the Marine renewable energy utilization,the wind and waves can capture device combined with turbine platform design not only can share the mooring system and transmission cables,also can reduce the occupied area,to improve China’s ocean development ability.This paper proposes a semi-submersible floating wind turbine platform combined with a point absorber wave energy conversion device.The hydrodynamic software ANSYS-AQWA is used to conduct the frequency domain calculation of the integrated platform.The additional mass,radiation damping,wave force and response amplitude operator of the floater in single point absorber device and integrated platform.And then the power generation result in different wave directions and wave periods are compared,which verifies that the combined device design can effectively improve the power generation of the point absorber wave energy converter.Secondly,the PTO system parameters of the integrated platform are analyzed to select the optimal Bpto value.Aiming at the optimization design of the floater radius size in the integrated platform,the displacement,velocity and power generation of the floater with different radius size in the vertical direction are investigated in multiple periods of regular and irregular waves.A more appropriate floater radius size is obtained by the comparing of power generation.Finally,7200 seconds of time domain analysis are conducted to the mooring system of the integrated platform.The influences of mooring system stiffness and unit mass on displacement,mooring load,laid length and power generation of the integrated platform are compared.In order to ensure the stability of the mooring system,extend the mooring life and improve the power generation efficiency of the integrated device,the selection suggestions of mooring system parameters are given. |
