Practical Considerations for Recursive DFT Implementation in Numerical Relays

Author

Darwish, Hatem A. ; Fikri, Magdy

Author_Institution

Dept. of Electr. Eng., Menoufia Univ.

fYear

2006

fDate

21-24 May 2006

Firstpage

880

Lastpage

887

Abstract

In this paper, practical considerations for recursive discrete Fourier transform (DFT) implementation in numerical relays are presented. The DFT filter instabilities which would produce magnified errors are emphasized. The aspects ruling error magnification of the estimated magnitude and phase are highlighted. Novel solutions directed for the elimination of error magnification are proposed and intensively tested. Digital signal processing (DSP) board based test set-up is utilized for results corroboration. The paper results are valuable for the protection engineers particularly those concerned with the development and implementation of numerical relays

Keywords

digital signal processing chips; discrete Fourier transforms; phase estimation; power filters; relay protection; testing; DFT filter; DSP board based test set-up; digital signal processing board based test set-up; discrete Fourier transform; filter instabilities; magnitude estimation; numerical relays; phase estimation; recursive DFT implementation; Digital relays; Digital signal processing; Filters; Frequency estimation; Phase estimation; Power engineering and energy; Power system protection; Power system relaying; Protective relaying; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference and Exhibition, 2005/2006 IEEE PES

Conference_Location

Dallas, TX

Print_ISBN

0-7803-9194-2

Type

conf

DOI

10.1109/TDC.2006.1668614

Filename

1668614