Transformer winding losses evaluation when supplying non linear load
| Title | Transformer winding losses evaluation when supplying non linear load |
| Publication Type | Conference Paper |
| Year of Publication | 2009 |
| Authors | Frelin, W, Berthet L, Petit M, Vannier J-C |
| Conference Name | Proceedings of the 44th International Universities Power Engineering Conference |
| Date Published | September |
| Conference Location | University of Strathclyde |
| Keywords | Power Quality Transformer Modelling and Sensing |
| Abstract | Nonlinear loads produce harmonic currents, which induce additional losses in transformers and cause temperature rise, especially in the windings. The estimation of winding eddy current loss, in the presence of harmonics, is based on the cognition of winding eddy current loss under rated conditions. This paper deals with the transformer winding loss estimation and gives a simplified winding resistance expression that takes winding eddy-current into account and permits to estimate associated losses under rated condition. The impact of transformer winding characteristics, as thickness and layer number, on the resistance variation with frequency is shown. |
