Description of somplified numerical model relevant for development of control consepts. DeepWind Deliverable D4.1

This report gives a description of a simplified numerical model for a floating vertical axis wind turbine relevant for development of control concepts. The model consists of a look-up table of aerodynamic forces based on a double-multiple streamtube representation of the aerodynamics, coupled with spring-damper representations of the most relevant floating tower and mooring system degrees of freedom, a simple representation of the hydrodynamic Magnus effect, and different versions of a model describing the electrical system (generator, converter and grid connection) with varying level of detail.
This model includes the most relevant characteristics and degrees of freedom of the DeepWind turbine, and is well suited for analyses of control concepts without involving too time-consuming simulations.