1.Data consolidation: removal of the outliers and correction for the effect of air density and wind turbulence;
2.Creation of the reference power curve with the bin method;
3.Application of the translation transformation to obtain a normal distribution in each bin;
4.Calculation of the residuals in each bin;
5.Renormalization of the residuals towards a distribution with mean of 0 and standard deviation of 1 and temporal agglomeration of the residuals in each bins toward a globalized residual in function of the time;
6.Application of control charts to evaluate if the WTG suffered a change in its behavior.