Transformer safety risk assessment method based on load characteristics and multiple fault characteristics

Due to the lack of correlation analysis on the influencing factors of the main transformer load of transformer in existing methods, the evaluation results are inaccurate. Therefore, we proposed the transformer risk assessment method considering load characteristics and multiple fault characteristics. Firstly, a correlation analysis is conducted on the factors affecting the main transformer load of the transformer. Based on the analysis results, principal component analysis and grey correlation analysis, the importance of different types of fault characteristics in transformers is measured, and the weight vectors of different fault types are calculated to obtain the corresponding feature vectors for transformer fault types. Then, the fault types and feature vectors of the transformer are statistically analyzed, and the risk of the transformer is evaluated by using improved Analytic Hierarchy Process. Finally, the experimental test results show that the proposed method can not only obtain high accuracy evaluation results, but also effectively reduce the evaluation time.