Improving the response transient and dynamic stability using voltage-based droop control in an islanded microgrid equipped with energy storage

Abstract

Due to the existence of a high number of unintegrated small-scale sources, islanded microgrids need some specific flexibilities such as energy storages. Therefore, in order to control the load and distributed generations in a microgrid, voltage-based droop control is used. This control method determines the switching of power electronic converters to ensure the stable operation of the microgrid. In this paper, the voltage-based droop control is applied to energy storage systems considering their charge condition based on fuzzy controller. This voltage-based droop control automatically adjusts the power priority of microgrid elements too and energy storage systems are considered in this priority list without any communication tools. One of the advantages of this method is coordinated combination of distributed generations in the studied system. The simulated cases prove the efficient performance of voltage-based droop control in transient and dynamic responses in existence of all element of the microgrid.