Consecutive DFT Method for Instantaneous Oscillating Phasor Measurement

Author

Hui Xue ; Dunsheng Song ; Rengang Yang

Author_Institution

Coll. of Inf. & Electr. Eng., China Agric. Univ., Beijing, China

Volume

28

Issue

4

fYear

2013

fDate

Nov. 2013

Firstpage

4634

Lastpage

4644

Abstract

A consecutive DFT method for instantaneous oscillating phasor measurement is proposed in this paper. The proposed method is based on one cycle DFT and applies three consecutive DFT values for phasor measurement. First, an analysis of standard DFT based phasor measurement method under low frequency oscillations is given. Then a method to eliminate the phasor measurement errors is proposed based on the relation among three consecutive DFT values. Due to its high precision and low required processing effort, the proposed algorithm is a good candidate for online phasor measurement under low frequency oscillation transient conditions.

Keywords

discrete Fourier transforms; oscillations; phasor measurement; DFT values; consecutive DFT method; instantaneous oscillating phasor measurement; low frequency oscillation transient conditions; online phasor measurement; standard DFT based phasor measurement method; Discrete Fourier transforms; Frequency measurement; Frequency modulation; Measurement errors; Oscillators; Discrete Fourier transforms; measurement; modulation;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/TPWRS.2013.2268858

Filename

6553614