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This paper presents a wind-turbine model for energy capture and switching simulation at lull wind conditions. The model includes aerodynamics as well as the control parts. It allows to study turbine behavior dependent on different controller settings and wind-speed characteristics. Based on such simulations, control parameters can be optimized regarding energy capture and turbine profits near cut-in wind speed. This was applied to a standard 1.5-MW wind turbine. Model validation was done using measurement data of different wind turbines. The model is kept as simple as possible considering the modeling of system components. However, all simplifications taken are allowable for energy capture and switching simulation. They guarantee shortest simulation times.