Single-phase microgrid, islanded operation, grid-connected operation, photovoltaic/battery unit, grid-forming droop control
Abstract
In a scenario where the use of renewable sources only expands and the level of complexity of distribution systems becomes increasingly large, microgrids are an attractive grid configuration option as they enhance system reliability and keep the electrical parameters within quality standards. This paper aims to detail the main control strategies used to ensure the operation of single-phase microgrids. The simulated system has photovoltaic (PV) solar generation and supplies variable local loads that require the support of battery energy storage systems (BESS). The simulations began with the proper functioning test connected to the grid, followed by the islanding of this system, and once islanded, the system is subjected to generation and load variations. For this purpose, Matlab/Simulink is used to accomplish the simulations. The results show transitions between states with few oscillations and fast returns to the operating point.
