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Partial Refactorization-Based Machine Modeling Techniques for Electromagnetic Transients
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DOI：10.1109/TPWRD.2016.2529662.png)
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Abstract
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Electromagnetic transient-type (EMT-type) programs solve nodal analysis or modified-augmented-nodal-analysis (MANA) formulation-based power system network equations (PSNE). The PSNE coefficient matrix can be either constant or time varying depending on the utilized synchronous machine (SM) model. Therefore, a computational efficiency comparison for the SM models requires accounting for the refactorization scheme and the utilized sparse matrix solver (SMS). In addition, MANA formulation does not require or force admittance model usage and enables flexibility while representing the SMs in PSNE. This paper compares computational performances of various SM models for a practical case and accounts for the refactorization scheme, the utilized SMS, and the SM representation in MANA formulation.
Keywords:
Electromagnetic transients
modified-augmented-nodal-analysis
partial refactorization
sparse matrix solver
synchronous machine
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