Combined method for identifying a source of low-frequency oscillations in power system.

The identification and analysis of low-frequency oscillations (LFO) in the parameters of the electrical regime are significant for the efficient operation of power systems. The decision-making loop in most dispatching centers of large system operators includes LFO monitoring. It belongs to one of the most relevant areas of synchrophasor measurement data processing. There are several methods have for determining the source of forced oscillations. However, due to the scale and internal heterogeneity of the power systems, no one provides a final solution to the problem in practice. The paper proposes a combination of methods based on the analysis of the oscillation energy and the amplitude-frequency characteristics of the measuring signals. The paper considers the examples of the LFO analysis in actual cases in the power system of Russia. [ABSTRACT FROM AUTHOR]