Research on Key Position of Hot Spot Temperature of Dry Type Transformer in Distribution Network

The power transformer is one of the important equipment in the distribution network system and its safe and stable operation has an important impact on the reliability of the entire distribution network system [1]. The hot spot temperature of the transformer is one of the important factors that affect the insulation life of the distribution network transformer. In this paper, the magnetic field distribution of the dry-type transformer is obtained by using finite element software through electromagnetic field simulation calculation, so as to obtain its core loss and coil loss, and the temperature distribution of the dry-type transformer can be accurately calculated through the heat flow field, thereby obtaining the hot spot position of the transformer, which provides theoretical basis for online hot spot temperature monitoring of transformers.