Variable speed control of wind turbines using tuning functions design

In recent years, wind energy has become an important part of the electrical power generation. Wind variations produce mechanical power fluctuations and consequently the speed changes in the turbine rotor lead to variations in the currents and voltages produced by the wind generators. The purpose of this paper is the setpomt regulation of the angular speed of a wind turbine via the control of a rectified voltage produced by a secondary synchronous generator despite wind variations. The procedure based on the adaptive tuning functions and the backsteppmg design permits to adjust the rotational speed in order to maintain the tip speed ratio to its optimal value with the purpose of optimising the maximum available power. It has only been simulated the particular case of the design of the control algorithm that carries out its angular speed to its nominal value for the protection against the gusts wind whose speed values can be superior to the designed furling wind speed.