The application discloses a kind of based on
bathtub curve fitting transformer family defect identification method and device, comprising: obtaining the sample set of different
voltage grade
transformer average
failure probability;Based on sample set, the distribution fitting of different
voltage grade
transformer average
failure probability in sample set is carried out, and the
bathtub curve of transformer
failure probability is constructed;Using CATS
algorithm, the failure information of transformer that may exist family defect is matched with the similarity of transformer failure probability
bathtub curve, and the
similarity measure coefficient is obtained;
Similarity measure coefficient is standardized, and then according to the family defect
risk classification framework, the family defect of transformer is discriminated.The application uses Weibull-CATS method to establish the identification model of transformer family defect, using the data of
power grid data platform, just can offline to high-risk transformer family defect fast identification, without another electrical test, without affecting transformer operation, with higher precision, robustness.