Estimation of parameter errors from measurement residuals in state estimation [power systems]

Author

Liu, Wen-Hsiung E. ; Wu, Felix F. ; Lun, Shau-Ming

Author_Institution

Energy Manage. Syst. Div., Control Data Corp., Plymouth, MN, USA

Volume

7

Issue

1

fYear

1992

fDate

2/1/1992 12:00:00 AM

Firstpage

81

Lastpage

89

Abstract

Any error of network parameters affects the value of the measurement residuals calculated in state estimation. Explicit mathematical expressions relating the residuals to the parameter errors are derived. A two-step approach is proposed for parameter error estimation. The first step is to estimate a bias vector which combines the effects of parameter errors and the state of the system. A least-square approach using the measurement residuals calculated in each state estimation run is proposed for the first step. After several state estimation runs, a sequence of such bias vectors is obtained. The second step is to estimate the parameter errors from the sequence of bias vectors. A recursive least-square estimation method is proposed for this step. Theoretical and computational issues of the proposed method are addressed. Test results are presented

Keywords

errors; least squares approximations; parameter estimation; power systems; bias vector; error estimation; least-square approach; measurement residuals; network parameters; parameter errors; power systems; recursive least-square estimation method; state estimation; Computer errors; Energy management; Error analysis; Estimation error; Intelligent networks; Parameter estimation; Power measurement; Power system measurements; State estimation; Topology;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/59.141690

Filename

141690