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### 2. What are the advantages of SAS?
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In power system modeling and analysis, SAS has proven several features:
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In power system modeling and analysis, SAS has been proven to have the following features:
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* **High numerical robustness.** Steady-state analysis usually requires solving nonlinear algebraic equations. Traditional tools usually use Newton-Raphson method or its variants, whose results can be highly dependent on the selection of starting point and they suffer from non-convergence problem. In contrast, SAS provides much better convergence thanks to the high-level analytical nature.
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