TY - JOUR
TI - Analysis of winding temperature field under dynamic variable load of oil-immersed transformer
AU - Xu Dapeng
AU - Mao Yu
AU - Yang Xiaohui
AU - Qin Chunxu
AU - Shang Haikun
AU - Zhao Jun
AU - Zhang Jianying
AU - Li Zhiwei
JN - Thermal Science
PY - 2021
VL - 25
IS - 4
SP - 3009
EP - 3019
PT - Article
AB - The research on the temperature field of the transformer winding under  dynamic variable load is of great significance for ensuring the safe  operation of power systems. This paper takes an SSP-360000/500 transformer as  the research object, establishes a 2-D simulation model, and uses the finite  volume method to analyze the high voltage winding and low voltage winding  temperature distribution of the transformer under dynamic variable load. The  simulation calculation results have been fully verified by the experimental  data to make the successful prediction of the overall temperature and hot  spot temperature position of forced oil circulation transformers with a  guided structure. The results show that the most significant temperature  raise occurs at the secondary end of the winding. In the case of dynamic  variable load. The temperature raise of the winding becomes larger as the  load increases, but before the rated load is in the stable temperature rise  range, it can run safely for a long time. However, during overload operation,  the average temperature raise of the high voltage winding may exceed its  limit, the insulation material is damaged.