Now showing items 1-2 of 2

  • A sparsity-preserving spectral preconditioner for power flow analysis 

    Due to the ever-increasing demand for more detailed and accurate power system simulations the dimensions of mathematical models increase. Although the traditional direct linear equation solvers based on LU factorization are robust they have limited scalability on the parallel platforms. On the other hand simulations of the power system events need to be performed at a reasonable time to assess the results of the unwanted events and to take the necessary remedial actions. Hence to obtain faster ...

  • Sparsity Preserving Computation for Spectral Projectors 

    Authors:Yetkin, E. Fatih; Daǧ, Hasan
    Publisher and Date:(Amer Inst Physics, 2011)
    Several areas of applications such as model order reduction preconditioner design and eigenvalue problems for spectral projectors can be found in the literature. In this paper a fast and sparsity preserving approach for computing the spectral projectors is proposed. The suggested approach can be used in both Newton iteration and integral representation based methods. A comparison of the original and the suggested approaches in terms of computation time sparsity preservation and accuracy is presented ...