Individual Pitch Control of a Wind Turbine Based on Fuzzy Logic ADRC

Taking the variable speed variable pitch wind turbine as an object of study, which works under the condition above rated wind speeds, a fuzzy logic individual pitch control scheme was proposed based on auto disturbance rejection controller (ADRC) to reduce the influence of disturbance. For each of the state variables in the system, an auto disturbance rejection controller was designed, of which the parameters were adjusted by fuzzy logic control. The control strategy proposed was then compared with that of the PD and ADRC on the Matlab. Results show that the newly proposed control strategy can be used to observe and deal with the nonlinearity, wind speed and other unknown quantities to restrain the blade offset and achieve the goal of constant power output.