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.
Restricted to Registered users only
Download (608Kb) | Request a copy
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|
|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|
Actions (login required)