Adaptive estimation of wide range frequency changes for power generator protection and control purposes

Author

Szafran, J. ; Rebizant, W. ; Michalik, M.

Author_Institution

Inst. of Electr. Power Eng., Wroclaw Univ. of Technol., Poland

Volume

146

Issue

1

fYear

1999

fDate

1/1/1999 12:00:00 AM

Firstpage

31

Lastpage

36

Abstract

A method and a detailed adaptive algorithm for wide-range frequency change measurement is presented. The method is based on a two-stage operating principle in which the results of a coarse frequency measurement are used for both orthogonal filter adjustment and modifications to the basic algorithm that is applied to fine frequency estimation. The adaptive features ensure good selectivity of the algorithm (in the sense of higher and subharmonic attenuation) within the range 5 to 80 Hz. Simulation results presented confirm good accuracy of frequency estimation in the presence of a standard noise level in the input signal, as well as satisfactory frequency tracking properties of the algorithm at relatively high frequency-changing rates

Keywords

adaptive estimation; control system analysis computing; electric generators; electric machine analysis computing; frequency estimation; frequency response; machine control; machine protection; machine theory; 5 to 80 Hz; adaptive estimation; algorithm selectivity; coarse frequency measurement; fine frequency estimation; frequency estimation accuracy; frequency tracking properties; harmonic attenuation; orthogonal filter adjustment; power generator control; power generator protection; two-stage operating principle; wide range frequency changes;

fLanguage

English

Journal_Title

Generation, Transmission and Distribution, IEE Proceedings-

Publisher

iet

ISSN

1350-2360

Type

jour

DOI

10.1049/ip-gtd:19990052

Filename

756480