Variable pivot column oriented Givens rotations based power system state estimator

Pandian, A and Soman, SA and Parthasarathy, K (1998) Variable pivot column oriented Givens rotations based power system state estimator. In: International Journal of Electrical Power & Energy Systems, 20 (3). pp. 183-189.

PDF Variable_pivot-57.pdf Restricted to Registered users only Download (623kB) | Request a copy

Abstract

The numerically stable power system state estimation (PSSE) algorithm uses a Givens rotations based least square (LS) solver. Row and column ordering techniques are used to reduce computations as well fills arising during sparse matrix QR decomposition. Row oriented algorithm is popularly used for QR decomposition in PSSE application with a priori row and column ordering to reduce fills. This paper proposes online variable pivot row and column ordering techniques for sparse QR decomposition, which locally reduce fills during each rotation operation. Use of online ordering techniques requires a shift from row oriented QR decomposition to column oriented QR decomposition. Simulation results on large power systems demonstrate the benefits of the proposed approach in comparison to row oriented QR decomposition.

Item Type:	Journal Article
Publication:	International Journal of Electrical Power & Energy Systems
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Keywords:	Power system state estimation;Givens rotations;Matrix decomposition
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	04 Dec 2006
Last Modified:	19 Sep 2010 04:32
URI:	http://eprints.iisc.ac.in/id/eprint/9029

Actions (login required)

View Item