Digital analysis of power systems dynamic oscillation using a curve fitting technique

This paper discusses an application to the least error squares (LES) curve fitting technique, for analyzing the power systems dynamic oscillation, to determine the damping constant and oscillation magnitude. Unlike the other available techniques, the damping constant and oscillation magnitude can be obtained directly from the digitized samples of the swings. It is assumed that the frequency components of the power system swings are identified in the frequency spectrum. The results obtained using the proposed technique showed a good agreement with the actual values of a given example.