Nonlinear, lumped parameter transformer model reduction technique
- Rensselaer Polytechnic Institute, Troy, NY (United States). Electric Power Engineering Dept.
Utility engineers often need nonlinear transformer models in order to investigate power system transient events. Methods exist to create accurate wideband reduced order linear transformer models, however, to date a method of creating a reduced order wideband nonlinear transformer model has not been presented. This paper describes a technique that starts with a detailed nonlinear transformer model used for insulation design studies and reduces its order so that it can be used conveniently in EMTP. The method is based on linearization of the core`s saturable characteristic during each solution time intervals. The technique uses Kron`s reduction approach in each solution time interval. It can be applied to any nonlinear lumped parameter network which uses electric parameter analogies (i.e., FEM networks). This paper outlines the nonlinear reduction technique. An illustrative example is given using the transient voltage response during saturation for a 785/345/34.5kV, YYD 500 MVA single phase auto transformer.
- OSTI ID:
- 64426
- Report Number(s):
- CONF-940702-; ISSN 0885-8977; TRN: IM9528%%85
- Journal Information:
- IEEE Transactions on Power Delivery, Vol. 10, Issue 2; Conference: 1994 Institute of Electrical and Electronic Engineers/Power Engineering Society (IEEE/PES) summer meeting, San Francisco, CA (United States), 24-28 Jul 1994; Other Information: PBD: Apr 1995
- Country of Publication:
- United States
- Language:
- English
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