A detailed model of a full conversion wind turbine is presented in this paper. Most of the systems found in a modern wind turbine are included in the model and an optimal level of model complexity is achieved to allow the design, analysis and simulation of controls and subsystem interactions within a turbine under various conditions. Mechanical, electrical and control subsystems were modeled to achieve flexibility for future expansion and properties that can be analyzed. Beside describing the overall wind turbine (WT), simulation system integration, which couples a variety of freeware and commercial software, the paper introduces a variable speed control for wind turbine with stall power regulation. It also describes the analysis of the interactions between components which cannot be observed with a simple WT model.