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- W2313373902 abstract "This paper proposes and tests strategies to accomplish high quality incomplete triangular factors (ILU) preconditioners for iteratively solve the load flow sublinear problem. The process begins constructing the preconditioner over the reordered Jacobian matrix calculated in the first Newton iteration. If the iterative process does not start due to high inaccuracies and/or numerical stability problems emerged during the preconditioner construction, the solution process is restarted and the Jacobian matrix calculated in the first Newton iteration is preprocessed through scaling, nonsymmetric and symmetric (reordered) permutations, leading to a new and better quality preconditioner. Numerical experiments considering two Brazilian power system configurations (2256/3515 buses) operating under adverse conditions (heavy loaded) corroborate the efficiency of such strategies over the preconditioner quality improving the robustness of the iterative solution process. A LU preconditioner and a direct solver for comparison purposes are also considered." @default.
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- W2313373902 date "2011-04-16" @default.
- W2313373902 modified "2023-09-27" @default.
- W2313373902 title "An Efficient Reordering Technique for Incomplete Factorization GMRES Preconditioning: Application in Load Flow Problems" @default.
- W2313373902 doi "https://doi.org/10.2202/1553-779x.2343" @default.
- W2313373902 hasPublicationYear "2011" @default.
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