Negative values of equivalent leakage inductance and winding resistance are often encountered when modeling three-winding transformers in power system simulations. These negative valued parameters can sometimes cause problems in arriving at a steady-state solution, and can result in unstable time-domain simulations. A modified equivalent circuit based on an autotransformer is proposed for three-winding transformer modeling. This model requires only positive values of inductances and resistances and thus leads to stable numerical solutions. Such a model can be derived for most practical situations. The superiority of the proposed model is demonstrated by means of an EMTP/ATP simulation of a test case involving a single-phase three-winding transformer.
|Number of pages
|Published - 1999
|Proceedings of the 1999 Winter Meeting of IEEE Power Engineering Society. Part 1 (of 2) - New York, NY, USA
Duration: Jan 31 1999 → Feb 4 1999
|Proceedings of the 1999 Winter Meeting of IEEE Power Engineering Society. Part 1 (of 2)
|New York, NY, USA
|1/31/99 → 2/4/99