State estimation for large power distribution systems

Dr. J. Besada-Juez, A. González-Bordagaray, J. Ferro-Vázquez, G. Plaza-González



This article presents the modifications andimprovements that have been included over the classic formulation of the state estimation to be able to run in real networks with large power distribution systems. Improvements include a new penalty term that keeps bus consumption or power generation within an allowed band and the inclusion of dynamic elements such as voltage regulators and capacitor batteries.
A complete algorithm is presented that is capable of operating on large power systems in near real time. This algorithm and the results have been tested with numerous cases of real distribution networks covering large geographical areas, obtaining very good results and demonstrating the enormous usefulness of this approach.

Published in: Renewable Energy & Power Quality Journal (RE&PQJ, Nº. 17)
Pages: 177-182 Date of Publication: 2019/07/15
ISSN: 2172-038X Date of Current Version:2019/04/10
REF: 256-19 Issue Date: July 2019
DOI:10.24084/repqj17.256 Publisher: EA4EPQ


Authors and affiliations

Dr. J. Besada-Juez1, A. González-Bordagaray2, J. Ferro-Vázquez2, G. Plaza-González1
1. Department of Software Engineering. Qwi Tecnologías de la Información. Madrid (Spain)
2. Operation Technical Services. Iberdrola Distribución Eléctrica. Bilbao (Spain)

Key words

State estimation, measurement quality, large power distribution systems.


[1] John J. Grainger, William D. Stevenson, “Power System Analysis” McGraw-Hill (1994).
[2] Ali Abur, Antonio Gomez Exposito, “Power System State Estimation Theory and Implementation”, CRC Press (2004).
[3] Yousu Chen, “Weighted-Least-Square State Estimation”, PNNL (2015).
[4] George N. Korres, “A Robust Method por Equality Constrained State Estimation”, IEEE Transactions on Power Systems (2002).
[5] Jian Chen, “Measurement Enhancement for State Estimation”, Texas A&M University (2008).
[6] James D. McCalley, “Electrical Power Transmission”, Iowa State University (1998).