Sensitivity analysis of wind power generating system

Assessment of effect of parameter variation on system dynamic performance is necessary for designing high performance system control strategies. The variation in parameter values makes the model uncertain, thus the control scheme designed without considering these variations do not offer the desired and optimal system performance when applied to systems with parameter variations. With the tremendous growth of wind energy generating systems these days, the assessment of dynamics of wind turbine generators and the parameters which may influence the dynamics has became of utmost importance. The present article aims to identify the parameters to which the system dynamics is sensitive. A comprehensive study is carried out to design optimal controllers for the system under consideration with ± 25% parameter variations. The results are compared with open loop system dynamics. The investigations of set of eigenvalues obtained under various parameter variations are carried out and fruitful conclusions area drawn. The parameters relating high performance operation of permanent magnet machines are found to be the sensitive parameters of the system along with the reactance of transmission link connecting machine to infinite bus.