Dynamic thermal modelling of power transformers

  title={Dynamic thermal modelling of power transformers},
  author={Dejan Susa and Matti Lehtonen and Hans Nordman},
  journal={IEEE Transactions on Power Delivery},
The aim of this paper is to introduce hot-spot and top-oil temperature thermal models for more accurate temperature calculations during transient states based on data received in a normal heat run test (i.e., the top oil in the tank of the transformer and the average winding-to-average oil gradient). Oil viscosity changes and loss variation with temperature are taken into account. The new thermal models will be validated using experimental (fiber-optic test) results obtained at varying load… CONTINUE READING
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