Abstract
This paper proposes an optimization model for the secondary control of islanded microgrids. It considers the action of the primary control and the references given by the tertiary control. The model is solved in each step, based on a linear approximation of the frequency-dependent power flow equations. The main objective of the model is to carry out frequency and voltages to suitable values, considering the capacity limits of renewable sources and energy-storage devices. Numerical experiments on the CIGRE low-voltage benchmark test system demonstrate the frequency achieve nominal values taking into account the main constraints of the system.
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