Transformer State Evaluation Based on Improved TOPSIS Method

Transformer is one of the main equipments in power system. Its operation state directly affects the reliability of power system. Therefore, it is very important to carry out the research of transformer state evaluation. Since the current state evaluation method can only evaluate a single transformer, this paper proposes an algorithm for simultaneous assessment of multiple transformers. Firstly, the transformer condition evaluation index system is established. Secondly, TOPSIS is improved by using the grey correlation degree, and a transformer condition assessment model is established by using the improved algorithm. Finally, the state of 6 transformers is evaluated according to the relevant data, and the rationality and validity of the proposed method are verified by examples. (paper)