Open AccessAnalysis of temperature field of medium frequency transformer based on improved thermal network method
Author(s) -
Xu Wanlun,
Huang Pei,
Liu Zhenxing,
Zhao Min,
Dian Renjun,
Wang Peng,
Wang Qi,
Wang Dan,
Shen Tong
Publication year - 2022
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/gtd2.12451
Subject(s) - transformer , dissipation , thermal , finite element method , mechanics , yoke (aeronautics) , heat transfer , electrical engineering , mechanical engineering , electronic engineering , engineering , physics , structural engineering , thermodynamics , voltage , fly by wire , control system
Medium frequency transformer (MFT) plays a key role in future power systems and new energy systems. It is very important for the safe operation of MFT to correctly calculate the temperature rise and hot spot position. According to the heat dissipation of transformer, the equivalent thermal network model of the core‐type transformer is established in this paper. The traditional thermal network model ignores the heat dissipation of the magnetic core column and the inner surface of the yoke to the air. In this paper, the magnetic core column is divided into the air surrounding part and winding surrounding part. The heat dissipation on the inner surface of the yoke is further considered. The improved thermal network model is verified by finite element simulation. The results show that compared with the traditional thermal network model, the improved thermal network model proposed in this paper can more comprehensively analyse the temperature field distribution and calculate the node temperature more accurately.