Methods and systems to improve the effectiveness of the stall-controlled wind turbine by accurately determining the wind speed without using the anemometer and other separate wind speed measuring device. Wind speed, among other methods, to track the mapping TSR model for operation in stall controlled wind turbines in a given TSR range, during ramp transition mapped for the desired wind speed range when reaching the maximum desired power level decreasing the RPM value at lamp start by following the RPM (transferring control to RS), when it reaches a desired RPM level, increasing the RPM along with power, and / or periodic unloading of the rotor it may be determined by use. Wind speed information may be utilized to control the wind turbine parameters.