Abstract: Renewable energy is energy derived from natural sources that are replenished at a higher rate than they are consumed. Wind energy plays significant role and can be considered as the most deployed renewable energy source; however, the efficiency level and cost-effectiveness of a wind turbine system with regard to wind application are mainly dependent on its control.   There is a most important recent technique named Maximum Power Point Tracking (MPPT) that is used in wind turbines. MPPT allows tracking the optimal operation points of the wind turbine system under fluctuating wind conditions and the tracking process speeds up over time. Irrespective of the knowledge of intangible turbine mechanical characteristics such as its power coefficient curve, power characteristic, or torque characteristic, MPPT can be achieved. So in this paper, wind turbine systems, control methods and strategies for wind turbine systems, and MPPT control methods and strategies for wind turbine systems had been studied.

Keywords: Wind turbine system, Control methods, Control strategies, Maximum Power Point Tracking techniques and Maximum Power Point Tracking strategies.