Sensitivity Analysis for Frequency Regulation in a Two-Area Power System

Julian Patino, Felipe Valencia, Jairo Espinosa

Abstract


In recent years, the integration level of renewable energy sources into the grid system has grown considerably. In the near future, renewable-based power is expected to be comparable to the conventional power generation systems. Nevertheless, the variations in renewable power can induce negative effects on power systems, such as frequency disturbances. This paper presents a study of the sensitivity functions for system frequency to power changes produced by renewable energy sources. Transfer functions are analyzed using Bode plots. The results reveal that there is a region where the impacts of the harmonic contents of the power variations cause larger impacts on both the frequency and the total transferred power of a given control area.

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Keywords


renewable energy; power system control; frequency regulation; sensitivity analysis; Bode plots

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