Treatment of inequality constraints in power system state estimation

Author

Clements, Kevin A. ; Davis, Paul W. ; Frey, Karen D.

Author_Institution

Worcester Polytech. Inst., MA, USA

Volume

10

Issue

2

fYear

1995

fDate

5/1/1995 12:00:00 AM

Firstpage

567

Lastpage

574

Abstract

A new formulation of the power system state estimation problem and a new solution technique are presented. The formulation allows for inequality constraints such as VAr limits on generators and transformer tap ratio limits. In addition, unmeasured loads can be modeled as unknown but bounded quantities. The solution technique is an interior point method that uses logarithmic barrier functions to treat the inequality constraints. The authors describe computational issues arising in the implementation of the algorithm. Numerical results are given for power systems ranging in size from six to 118 buses

Keywords

digital simulation; power system analysis computing; power system state estimation; CPU times; VAr limits; algorithm; buses; computer simulation; generators; inequality constraints; interior point method; logarithmic barrier; power system state estimation; solution technique; transformer tap ratio limits; Lagrangian functions; Load modeling; Observability; Power measurement; Power system measurements; Power system modeling; Power systems; Reactive power; State estimation; Voltage;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/59.387890

Filename

387890