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A new eigen-analysis method of steady-state stability studies for large power systems: S matrix method

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2 Author(s)
Uchida, N. ; Central Res. Inst. of Electr. Power Ind., Tokyo, Japan ; Nagao, T.

The authors discuss an advanced version of the S matrix method, an eigenvalue technique for the analysis of the steady-state stability (or the stability against small signals) of large power systems. The dynamic characteristics of power systems can be linearly approximated with a set of differential equations. The technique transforms the matrix A into the matrix S and then determines several eigenvalues with the largest absolute values from matrix S that correspond to the dominant eigenvalues of matrix A. In the process of identifying the appropriate eigenvalues, the method uses the refined Lanczos process, which makes high-speed calculation possible through the use of the sparsity and the structural uniformity of matrices

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Power Systems, IEEE Transactions on  (Volume:3 ,  Issue: 2 )