说明：  Many scientific competencies are necessary to study wind energy conversion systems (meteorology for wind's behavior study, mechanics and chemistry for constraints and composition of the materials used in the turbine, electrical engineering for electromechanical conversion and transformation of the electrical power and automatic for the control of the turbine and generator connected to it). The study presented in this document concerns the automatic part of this energy conversion system. After a short recall of the concepts and equations governing wind energy conversion systems, this document makes a state of two strategies for the control of the mechanic speed of the wind turbine in zone 2 in order to maximize the power product.