Contrastive analysis of general and special forced oscillations of power systems

With the continuous incorporation of renewable energy and new loads into the electric power grid, random factors that induce general forced oscillations (GFOs) gradually become risks that affect the power system's security and stability. This research conducts a comparative analysis of the generation mechanisms of GFOs versus the traditional special forced oscillations (SFOs), specifically, from the perspective of frequency domain. Similarities and differences in en-oscillating conditions, occurrence probabilities, and the influencing factors of GFO and SFO are compared to better understand and recognize the GFO theory and the response characteristics of the power system under random excitations. A series of simulations in the lO-generator, 39-bus New England Test System is carried out to verify the analysis.

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