Fourier transform based procedure for investigations on the grid frequency signal

The continuous growth of PV and wind sources makes the inertia of power systems decrease and creates larger frequency deviations. Frequency oscillation is a stochastic signal and, consequently, it could be complex to compare the effectiveness of different control approaches devoted to manage this problem. In this paper a Fourier transform procedure is proposed in order to define a standard frequency oscillation and to set up the dynamic model of the electric grid. The final goal is to numerically simulate a realistic transient behavior; using this grid, such a model results to be the ideal starting point for evaluating the effectiveness of different possible approaches to manage the energy balance problem.