An Iterative Method for Solving Complex-Symmetric Systems Arising in Electrical Power Modeling
Victoria E. Howle, Stephen A. Vavasis · SIAM Journal on Matrix Analysis and Applications · 2005
We propose an iterative method for solving a complex-symmetric linear system arising in electric power networks. Our method extends Gremban, Miller, and Zagha's [in Proceedings of the International Parallel Processing Symposium, IEEE Computer Society, Los Alamitos, CA, 1995] support-tree preconditioner to handle complex weights and vastly different admittances. Our underlying iteration is a modification to transpose-free QMR to enhance accuracy. Computational results are described.