Model and Simulation of a Floating Hybrid Wind and Current Turbines Integrated Generator System, Part II: Hydrodynamics and Acting Forces

Abstract

This work is part of a series of publications that propose a floating hybrid system for which a simulation tool has been developed, called FHYGSYS (Floating Hybrid Generator Systems Simulator). The objective of this series of publications is to analyze the behavior and to evaluate different control strategies of the floating hybrid system. This system consists of an “OC3-Hywind” wind turbine and two marine current turbines presented by the authors in previous publications. This work completes the exposition of the mathematical model of the floating hybrid system started in a previous publication (Part I), in which the inertial, kinematic, and dynamic parts of the model were described. In this second part, the forces acting on the floating system are extensively described, and the turbines are modeled using the so-called One-Dimensional theory (or also known as Simple theory). The results obtained with the FHYGSYS simulation tool have been validated—through a code-to-code comparison—with FASTv8, both in the first part and in this second part of this work.