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Frequency Band Decomposition of a Dynamic Persistence Measure Using Ambient Synchrophasor Data

A global measure of the persistence of oscillations in the bulk power grid using PMU has been developed. In this paper the contributions of different spectral bands to the persistence metric are defined and characterized, as a means to learn about the sources and patterns of oscillatory swing dynamics. These persistence-contribution metrics are computed for archived PMU data from the Western Interconnect: it is found that peaks in persistence arise from different spectral bands during the analysis period. The use of the persistence metric in a real-time monitoring system is presented.

Author(s):

Sandip Roy    
Washington State University
United States

Bernard Lesieutre    
University of Wisconsin
United States

 

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