State estimation for power distribution system and measurement impacts

Author

Li, Ke

Author_Institution

Northern California Power Agency, Roseville, CA, USA

Volume

11

Issue

2

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

911

Lastpage

916

Abstract

A distribution state estimator (DSE) based on the weighted-least-square approach and three-phase modeling techniques is presented in this paper. The three-phase model required to formulate the state estimator is developed. Customer load estimates and real-time measurements are modeled as expected values with errors. Particularly, this paper introduces the concept of stochastic results of DSE and has a detailed analysis. Test examples are used for demonstrating the capabilities of a DSE. The influence of the measurement placement and measurement accuracy on the estimated results are discussed. Other system parameters that affect the system state deviations are illustrated. The practice application of a prospective DSE is discussed

Keywords

distribution networks; least mean squares methods; measurement errors; measurement theory; power system analysis computing; power system measurement; power system state estimation; stochastic processes; application; customer load estimates; errors; measurement accuracy; measurement placement; power distribution system; power system state deviations; real-time measurements; state estimator; stochastic results; three-phase modeling; weighted-least-square approach; Circuits; Monitoring; Power distribution; Power engineering and energy; Power measurement; Power system management; Power system modeling; Real time systems; State estimation; Stochastic processes; Testing;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/59.496174

Filename

496174