Estratégias de controle hierárquico em microrredes CA trifásicas

Abstract

Due to the growth in demand for electricity in the world, the participation of generation distributed by renewable energy sources such as photovoltaic and wind, causes changes in the way energy is generated and consumed. In this scenario, microgrids and nanogrids emerge as a solution to integrate distributed generation into the electrical grid. The traditional system is predominantly distributed in alternating current, leading to studies of microgrids in alternating current, due to the low modifications to adapt the microgrids to the electrical sector. On the other hand, direct current loads in AC networks have grown and allied to the fact that some renewable energy sources have direct voltage, encourage the development of DC microgrids that cause changes of high economic factor. In this way, hybrid microgrids arise that try to syncretize the advantages of the DC and AC systems. In this context, the work aims to model and simulate a three-phase AC microgrid model with energy storage. The microgrid will have hierarchical control that is divided into primary, secondary and tertiary. In the primary control, the droop control technique will be used. The secondary control comes to nullify the voltage and frequency error caused by the droop control.