Title :
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
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;
Journal_Title :
Power Systems, IEEE Transactions on
DOI :
10.1109/TPWRS.2013.2279189
