Title :
A coherence method for detecting and analyzing oscillations
Author_Institution :
Pacific Northwest Nat. Lab., Richland, WA, USA
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;
Conference_Titel :
Power and Energy Society General Meeting (PES), 2013 IEEE
Conference_Location :
Vancouver, BC
DOI :
10.1109/PESMG.2013.6672430
