A direct numerical method for observability analysis

This paper presents an algebraic method that uses the triangular factors of singular, symmetric gain matrix to determine the observable islands of a measured power system. This is accomplished in a noniterative manner via the use of selected rows of the inverse factors. Implementation of the propose...

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Bibliographic Details
Published inIEEE transactions on power systems Vol. 15; no. 2; pp. 625 - 630
Main Authors Gou, B., Abur, A.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.05.2000
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Algebra
Covariance matrix
Estimators
Factorization
Gain
Gain measurement
Inverse
Islands
Jacobian matrices
Mathematical analysis
Mathematical models
Measurement errors
Observability
Phase measurement
Power measurement
Sparse matrices
State estimation
Symmetric matrices
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Summary:This paper presents an algebraic method that uses the triangular factors of singular, symmetric gain matrix to determine the observable islands of a measured power system. This is accomplished in a noniterative manner via the use of selected rows of the inverse factors. Implementation of the proposed method presents little additional effort, since sparse triangular factorization and forward/back substitution procedures common to existing state estimators, are the only required functions. The method is further extended for the choice of pseudo-measurements in order to merge the observable islands into a single observable system. Numerical examples are given to illustrate the details of the proposed methods.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0885-8950
1558-0679
DOI:10.1109/59.867151