On the application of αβ-transformation for power systems frequency relaying

Author

Soliman, S.A. ; Alammari, R.A. ; El-Hawary, M.E.

Author_Institution

Dept. of Electr. Eng., Qatar Univ., Doha, Qatar

fYear

2001

fDate

2001

Firstpage

120

Lastpage

124

Abstract

This paper presents a new and very accurate algorithm for power system frequency measurement. The proposed algorithm is based on αβ-transformation of the three phase voltages or current waveforms in the relay location, where digital samples are available for the three phase waveforms. Having obtained the digital samples of one of the components, α-β components, the finite divided difference formulae are used to calculate the parameters of one of these components; the magnitude, the frequency and phase angle. The necessary formulae are derived within the text and effects of imbalance and harmonics contamination on the waveforms are discussed within the text

Keywords

frequency measurement; power system measurement; power system protection; power system relaying; relay protection; αβ-transformation; digital samples; finite divided difference formulae; frequency; frequency measurement; harmonics contamination; parameters calculation; phase angle; power systems frequency relaying; relay location; three phase current waveforms; three phase voltage waveforms; three phase waveforms; waveforms; Amplitude estimation; Digital relays; Frequency estimation; Frequency measurement; Pollution measurement; Power harmonic filters; Power system harmonics; Power system measurements; Power system relaying; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering, 2001. LESCOPE '01. 2001 Large Engineering Systems Conference on

Conference_Location

Halifax, NS

Print_ISBN

0-7803-7107-0

Type

conf

DOI

10.1109/LESCPE.2001.941637

Filename

941637