The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	A study of the effects of weighting matrices in power system state estimation
Author:	Wang, Yanshi
View Online:	njit-etd1990-023 ([xi], 135 pages ~ 4.7 MB pdf)
Department:	Department of Electrical and Computer Engineering
Degree:	Master of Science
Program:	Electrical Engineering
Document Type:	Thesis
Advisory Committee:	Hubbi, Walid (Committee chair) Cohen, Edwin (Committee member) Friedland, Bernard (Committee member)
Date:	1990
Keywords:	Electric power systems --State estimation --Data processing. Electric power systems --State estimation.
Availability:	Unrestricted
Abstract:	The effects of weighting matrices that may be used in the Weighted Least Squares (WLS) method when applied to the problem of Power System State Estimation (PSSE) are studied. These weighting matrices include the one usually used in the literature and the one used in the utility PSSE programs The performances of these weighting matrices are compared using the Monte Carlo simulation technique. To test the performances of the weighting matrices, a PSSE program is developed, different performance indices for state comparison are defined, and many cases are studied. Results show that the weighting matrix usually used in literature, 1/σ², and a proposed weighting matrix, 1/σ, give comparable results and are the best of those tested. The weighting matrix used in the utility industry programs offers little or no improvement.