The invention relates to a wind generating set performance assessment method based on the
correlation analysis. The method comprises the following steps that firstly, data are collected through a big-
data platform; secondly, a generating set to be analyzed is determined; thirdly, the set in which correlation needs to be determined is subjected to the
correlation analysis through different unit wind speeds with time as the sequence; fourthly, a correction unit is selected, and the
relative power generating amounts of the correction unit are obtained; and fifthly, the average value of the
relative power generating amounts is solved, when the
relative power generating amount of the generating set to be analyzed is lower than the average power generating amount (k*100)%, the performance of the generating set to be analyzed is not good enough, and the generating set to be analyzed is in urgent need of rectification, wherein k is a constant. According to the wind generating set performance assessment method, a multi-level correlation and
consistency analysis method is utilized, the related unit is determined, the influence of complex wind conditions on the performance assessment is eliminated, the relative power generating amount of the related unit is directly applied to serve as the assessment standard, the influence of good and bad wind resources on power generating is eliminated, and the assessment result is more reliable.