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Title: A Coherence Method for Detecting and Analyzing Oscillations

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.
Authors:
Publication Date:
OSTI Identifier:
1324921
Report Number(s):
PNNL-SA-92284
400403209
DOE Contract Number:
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: IEEE Power and Energy Society General Meeting (PES 2013), July 21-25, 2013, Vancouver, British Columbia, Canada
Publisher:
IEEE, PISCATAWAY, New Jersey, United States.
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
coherence; power spectral density; phasor measurement unit (PMU); oscillations; power system dynamics