NJIT eTD::njit-etd1990-023::Wang, Yanshi::"A study of the effects of weighting matrices in power system state estimation"

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.

Title:	A study of the effects of weighting matrices in power system state estimation
Author:	Wang, Yanshi
Document Type:	Thesis
Department:	Department of Electrical and Computer Engineering
Degree:	Master of Science
Major:	Electrical Engineering
Advisory Committee:	Hubbi, Walid Cohen, Edwin Friedland, Bernard
Thesis 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.
Complete Thesis:	njit-etd1990-023 (150 pages ~ 4,374 KB pdf)
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