Observability analysis and bad data processing for state estimation with equality constraints

Journal Article · Sun May 01 04:00:00 UTC 1988 · IEEE Trans. Power Syst.; (United States)

DOI:https://doi.org/10.1109/59.192905· OSTI ID:6163451

Wu, F F; Liu, W H.E.; Lun, S M

The factorization-based observability analysis and the normalized residual-based bad data processing have been derived for state estimation using normal equation approach. The observability analysis is conducted during the process of triangular factorization of the gain matrix. The normalized residuals are calculated using the sparse inverse of the gain matrix. The application of the method of Lagrange multipliers to handle state estimation with equality constraints arising from zero injections is gaining popularity because of its better numerical robustness. The method employs a different coefficient matrix in place of the gain matrix at each iteration. In this paper, the factorization-based observability analysis and the normalized residual-based data processing are extended to state estimation with equality constraints. It is shown that the observability analysis can be carried out in the triangular factorization of the coefficient matrix and the normalized residuals can be calculated using the sparse inverse of this matrix. Test results are presented.

• Research Organization: Dept. of Electrical Engineering and Computer Sciences and the Electronics Research Lab., Univ. of California, Berkeley, CA (US)
• OSTI ID: 6163451
• Journal Information: IEEE Trans. Power Syst.; (United States), Journal Name: IEEE Trans. Power Syst.; (United States) Vol. 3:2; ISSN ITPSE
• Country of Publication: United States
• Language: English

Related Subjects

200300* -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
42 ENGINEERING
420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
ACCURACY
COMPUTER CALCULATIONS
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
DATA PROCESSING
ENERGY SYSTEMS
EQUATIONS
EQUATIONS OF STATE
MATRICES
POWER SYSTEMS
PROCESSING
TESTING