## Abstract

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.

Original language | English (US) |
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Pages | 1025-1030 |

Number of pages | 6 |

State | Published - 1999 |

Event | 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 |

### Other

Other | Proceedings of the 1999 Winter Meeting of IEEE Power Engineering Society. Part 1 (of 2) |
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City | New York, NY, USA |

Period | 1/31/99 → 2/4/99 |