Impact of Transformer Correlations in State Estimation Using the Unscented Transformation

Author

Caro, Eduardo ; Valverde, Gustavo

Author_Institution

Dept. of Stat., Tech. Univ. of Madrid, Madrid, Spain

Volume

29

Issue

1

fYear

2014

fDate

Jan. 2014

Firstpage

368

Lastpage

376

Abstract

This paper addresses the power system state estimation problem considering the correlations among instrument transformer signals. The correlations among processed measurements are estimated using the Unscented Transformation given the correlation and basic statistical information of internal measurements. In addition, the paper analyzes the impact of these correlations on the estimated states using the IEEE 118-bus test system under various operating conditions and measurement configurations.

Keywords

instrument transformers; matrix algebra; power system measurement; power system state estimation; power transformers; statistical analysis; IEEE 118-bus test system; instrument transformer signals; internal measurements; measurement configurations; power system state estimation problem; statistical information; transformer correlations; unscented transformation; Correlation; Covariance matrices; Current measurement; Instrument transformers; State estimation; Vectors; Voltage measurement; Correlated measurements; power system state estimation; uncertainty estimation; unscented transformation;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/TPWRS.2013.2279189

Filename

6594917