Covariance management based RLS algorithm for phasor estimation in severely noisy systems

Author

De Almeida, Luiz A L ; Lima, Antonio C de C

Author_Institution

Dept. of Commun. Syst., Fed. Univ. of Bahia, Brazil

Volume

13

Issue

4

fYear

1998

fDate

10/1/1998 12:00:00 AM

Firstpage

1067

Lastpage

1072

Abstract

This paper presents a new algorithm, derived from the recursive least squares (RLS), to estimate power system voltage and current harmonics for digital relay purposes. The algorithm is based on the RLS covariance matrix management, by making use of the covariance resetting in a different way. The approach provides a kind of attractor that absorbs all nonmodeled dynamics. In order to demonstrate its effectiveness, the proposed algorithm is applied to simulated signals and its performance is compared with other conventional methods

Keywords

covariance analysis; harmonic distortion; least squares approximations; parameter estimation; power system harmonics; power system protection; power system relaying; relay protection; RLS covariance matrix management algorithm; attractor; power system current harmonics; power system relay protection; power system voltage harmonics; protection performance; Covariance matrix; Digital relays; Least squares approximation; Power system dynamics; Power system harmonics; Power system management; Power system relaying; Recursive estimation; Resonance light scattering; Voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.714457

Filename

714457