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Sustained oscillations are one of major stability concerns of a power system operator. In order to take effective remedial reactions, it is preferred to detect sustained oscillations at their early stage. Previously, self-coherence spectra were used to detect sustained oscillations using phasor measurement unit (PMU) data. This paper proposes a hypothesis test using a bootstrap method to set up a...
When analyzing the electromechanical dynamic properties of power-system field-measurement data using signal processing techniques, it is often useful to identify and remove the slow trends within the data. This paper proposes an iterative non-linear trend identification algorithm. The proposed method adapts the upper and lower envelope idea proposed by empirical mode decomposition (EMD) method to...
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