A coherence method for detecting and analyzing oscillations

Author

Ning Zhou

Author_Institution

Pacific Northwest Nat. Lab., Richland, WA, USA

fYear

2013

fDate

21-25 July 2013

Firstpage

1

Lastpage

5

Abstract

In this paper, a coherence method is proposed to detect and analyze forced oscillations from phasor measurement unit data. The calculation of coherence spectrum is reviewed, and forced oscillations are related to the peaks in the coherence spectrum. Using simulation and field measurement data, the proposed coherence method´s performance is compared with the power spectral density method. When applied to detect and analyze forced oscillations under low signal noise ratio conditions, the proposed coherence method shows better performance.

Keywords

oscillations; phasor measurement; power system stability; coherence method performance; coherence spectrum calculation; field measurement data; forced oscillations; oscillation analysis; oscillation detection; phasor measurement unit data; power grids; power spectral density method; signal noise ratio conditions; Coherence; Data models; Noise; Oscillators; Phasor measurement units; Power system dynamics; coherence; oscillations; phasor measurement unit (PMU); power spectral density; power system dynamics;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Society General Meeting (PES), 2013 IEEE

Conference_Location

Vancouver, BC

ISSN

1944-9925

Type

conf

DOI

10.1109/PESMG.2013.6672430

Filename

6672430